AOR USA SR2000A Frequency Monitor User Manual SDU5600

®

SR2000A

FREQUENCY MONITOR

INSTRUCTION MANUAL

AOR, LTD.

TABLE OF CONTENTS

Table of contents ------------------------------------------------------------------------------------------- 1

1 Index ------------------------------------------------------------------------------------------------ 3

1-1 Introduction -------------------------------------------------------------------------------------- 3

1-2 Maintaining the unit ---------------------------------------------------------------------------- 3

1-3 Power requirements --------------------------------------------------------------------------- 4

1-4 Supplied accessories ------------------------------------------------------------------------- 4

1-5 Features ------------------------------------------------------------------------------------------ 4

2 Control and functions ------------------------------------------------------------------------------ 5

2-1 Front panel controls ---------------------------------------------------------------------------- 5

2-2 Rear Panel --------------------------------------------------------------------------------------- 7

3 Connections -------------------------------------------------------------------------------------------- 9

4 Power Switch ------------------------------------------------------------------------------------------- 9

4-1 Start up ------------------------------------------------------------------------------------------- 9

4-2 Powering down --------------------------------------------------------------------------------- 9

5 Operations of the SR2000A ---------------------------------------------------------------------- 9

5-1 Display ---------------------------------------------------------------------------------------------- 9

5-2 Key commands ---------------------------------------------------------------------------------- 12

6 Monitoring Modes --------------------------------------------------------------------------------------- 13

6-1 Basic operations – VFO mode (manual mode) ------------------------------------------- 13

6-1-1 Setting up the monitoring frequency --------------------------------------------------- 13

6-1-2 Setting up the receive mode ------------------------------------------------------------- 16

6-1-3 Audio Gain Control ------------------------------------------------------------------------- 16

6-1-4 Squelch control ------------------------------------------------------------------------------ 17

6-1-5 RF attenuator and preamplifier settings ----------------------------------------------- 18

6-1-6 Mute volume and squelch ----------------------------------------------------------------- 18

6-1-7 Input sensitivity (amplitude) -------------------------------------------------------------- 19

6-1-8 Resolution bandwidth (RBW) ------------------------------------------------------------ 19

6-1-9 Waterfall display function ------------------------------------------------------------------ 20

6-1-10 Selecting the operation modes --------------------------------------------------------- 21

6-2 Operation Modes ----------------------------------------------------------------------------------22

6-2-1 Spectrum analyzer mode ------------------------------------------------------------------- 22

6-2-2 Step resolution mode ------------------------------------------------------------------------ 23

6-2-3 Channel scope mode ------------------------------------------------------------------------ 24

6-3 Marker functions --------------------------------------------------------------------------------- 25

6-4 Calculation function ------------------------------------------------------------------------------ 27

6-5 Video monitor function -------------------------------------------------------------------------- 28

7 Configuration -------------------------------------------------------------------------------------------- 29

7-1 Resetting the SR2000A ------------------------------------------------------------------------ 31

8 Memory channels ------------------------------------------------------------------------------------- 32

8-1 Memory read mode ------------------------------------------------------------------------------32

8-2 Memory scan -------------------------------------------------------------------------------------- 33

8-3 Programming the memory ----------------------------------------------------------------------34

8-4 Memory text input -------------------------------------------------------------------------------- 35

8-5 Selected memory scanning ------------------------------------------------------------------- 36

8-6 Priority monitor ----------------------------------------------------------------------------------- 38

9 Frequency Offset -----------------------------------------------------------------------------------------39

10 Normal Search and FFT Search ------------------------------------------------------------------- 40

10-1 Programming Search banks -------------------------------------------------------------------- 40

10-2 Normal Search ------------------------------------------------------------------------------------ 42

10-3 Frequency Pass setup --------------------------------------------------------------------------- 42

10-4 FFT Search ---------------------------------------------------------------------------------------- 43

10-4-1 Search banks and FFT search ----------------------------------------------------------- 43

10-4-2 FFT search setup ---------------------------------------------------------------------------- 44

1

10-4-3 FFT search results --------------------------------------------------------------------------- 44

11 Delete menu ---------------------------------------------------------------------------------------------- 46

12 Computer control information ---------------------------------------------------------------------- 47

12-1 Command list ------------------------------------------------------------------------------------ 49

12-2 Command details ------------------------------------------------------------------------------- 50

13 Specifications -------------------------------------------------------------------------------------------- 60

14 Limited warranty ----------------------------------------------------------------------------------------- 61

2

1 Introduction

1-1 Introduction

Thank you for purchasing the SR2000A Frequency Monitor. The SR2000A is a worthy successor

to the SR2000 and is the “next generation” in frequency monitor. Using a five-inch TFT color

display, DSP (Digital Signal Processing) and FFT (Fast Fourier Transform), faster sampling rates

and color imaging, video display function, optional APCO25 (P25) decoder, the SR2000A opens

the door to new possibilities and applications. We put the power of FFT algorithms to work in

tandem with a powerful receiver covering 25 MHz ~ 3 GHz continuous (Cellular blocked for US

consumer version). The result is a compact color spectrum display monitor that’s ultra-sensitive,

incredibly fast, yet easy to use.

The SR2000A is perfect for base, mobile or field use and can also be used in combination with a

personal computer.

Every effort has been made to make this manual correct and up to date. Due to continuous

development of the product and by error or omission, anomalies may be found and this is

acknowledged.

manual may be copied or transferred by any means without the prior written consent of AOR,

LTD. AOR and the AOR logo are trademarks of AOR, LTD. All other trademarks and names are

acknowledged.

1-2 Maintaining the unit

There are no internal operator adjustments. In the unlikely event of service being required,

please contact your dealer for technical assistance.

Level of risk

As the SR2000A is powered from 12V DC, there is little chance of serious injury as long as

common sense is applied.

Observe the polarity of connections if supplied AC power units is not being used. DC input is a

nominal 12V DC, with the connector wired center conductor positive. Reverse polarity connection

will damage the SR2000A and could lead to the risk of fire or explosion under severe

circumstances.

Carefully handle the AC plug of the supplied AC power unit to prevent touching the terminals

when inserting or removing from the AC plug. NEVER connect the SR2000A directly to the AC

outlet.

Handling the SR2000A

Use a soft, dry cloth to gently wipe the SR2000A clean. Never use abrasive cleaners or organic

solvents which may damage certain parts. Treat the unit with care, avoid spillage or leakage of

liquids into the cabinet and power supply. Special care should be taken to avoid liquid entering

around the keys, main dial or via the connectors.

[Note: Never push or knock the LCD screen – it is very fragile and sensitive to shock.]

Special remarks

Do not use or leave the SR2000A in direct sunlight (especially the TFT display). It is best to avoid

locations where excessive heat, humidity, dust and vibration are expected. Always keep the

SR2000A free from dust and moisture.

3

1-3 Power requirements

The SR2000A may be provided with a suitable AC/DC power unit. The SR2000A is designed for

operation from a nominal 12 V DC regulated power supply (12 to 14 V is acceptable), which

should be capable of supplying a minimum of 1.5 amp continuous, ideally a 2 amp power supply

unit should be used.

[Note: Never connect the SR2000A directly to an AC outlet.]

[Safety Notice: Always disconnect the power supply from the AC outlet when not in use.]

Should the SR2000A appear to behave strangely, normal operation may be resumed by resetting

the microprocessor. Please refer to section “6. Configuration” for further information.

1-4 Supplied accessories

The following accessories are provided in the shipping box.

1 Instruction manual (this booklet)

1 AC adapter

1-5 Features

z FFT (Fast Fourier Transform) high speed display

The FFT search function enables incredibly high speed signal monitoring, 10MHz search

in approximately 0.07 seconds!

z Displays up to 40MHz of spectrum bandwidth

Up to 40 MHz of bandwidth can be displayed in real time through advanced Digital Signal

Processing. (No audio is available when the frequency span is set to 20MHz or 40 MHz)

z 5 inch TFT color LCD display

5 inch TFT color display is easy to monitor the clear, crisp images of received signals.

z Waterfall (time) display function

Tracks signals over time and uses colors to define their strength.

z Average or peak value readings

z Frequency coverage

25 MHz ~ 3 GHz (Cellular Blocked for US consumer version)

z Ultra-stable, high sensitivity triple conversion receiver

z AM/NFM/WFM/SFM receive modes

z Video display mode (NTSC, PAL, and SECAM format)

z 1000 memory settings

100ch x 10 memory banks

z Easy menu-driven operation

z PC control through serial port or USB interface

z APCO25 (P25) decoder (Optional decoder board required)

4

2 Controls and functions

2-1 Front panel controls

The front panel of the SR2000A is dominated by the large color LCD. Controls are ‘grouped’ to

assist efficient operation; there are a total of 26 keys in addition to the power on/off switch and the

rotary dial encoder.

1 Power switch

Press once to latch the switch in, switching on the SR2000A.

To switch off the SR2000A, press the switch again, the switch releases outward.

5

1 LCD (Liquid Crystal Display)

The large high resolution (320 x 240 pixels) 5 inch color TFT display provides all

operational information and spectrum display.

2 Soft function keys

Each one of the three “soft keys” has multiple roles as indicated on the LCD screen

depending on the circumstances of the operation.

3 Dial knob

The rotary dial knob is a multi-function rotary control and is used to move the cursor, to

make a selection, to move the marker/center frequency and to tune to the desired

frequency.

4. Main keypad

There are 20 main keys including numeric keys. Some keys have secondary functions,

and the functions are printed above each respective key. To access the secondary

function, press the “FUNC” key located at the top right of the control keys, then press

respective key.

5. Special function keys

Three (3) special function keys are provided with the SR2000A. Those keys are to be

used for setting the center frequency, squelch level and volume control (audio output).

6

2-2 Rear panel

ANT

This is the antenna input for the SR2000A. The connector is a BNC type. Use 50ohm

cable to connect your antenna.

DC 12V

The supplied power unit is terminated with a center positive (+) polarity connector.

PHONES

Headphone jack (3.5mm stereo type):

A pair of headphones or earphones may be connected.

When this headphone jack is used, the internal speaker will be automatically disabled.

EXT.SP

External speaker jack: This 3.5mm mono jack provides audio output to drive an external

speaker unit. This unit should have a nominal 8 ohm impedance and power handling of 2

watts or greater.

VIDEO OUT

This RCA connector provides the composite video output. An external video monitor may

be connected.

ACC

Accessory connector: Provides output for audio and the discriminator. See below.

7

REMOTE 1

USB interface connector. Use a USB-A to USB-B cable (not supplied) to connect your PC.

The USB driver can be downloaded from the following URL:

http://www.ftdichip.com/ftdrivers.htm

Click “VCP Drivers”, then select the device number “FT232B”.

REMOTE 2

RS-232C serial interface connector. Use a DB-9 serial cable to connector your PC.

(Caution: The REMOTE 1 and the REMOTE 2 cannot be used simultaneously.)

INTERNAL SPEAKER (TOP PANEL)

Internal speaker

ACC CONNECTOR PIN ASSIGNMENT

This connector provides output for audio and the discriminator, or for other applications

you might create. Refer to the pin assignment indicated in the chart below.

PIN NUMBER CONNECTION

1 5V DC @30mA max.

2 Discriminator output (500mV p-p)

3 10.7MHz IF output

4 NC

5 NC

6 AF out (H) 120mV @ 600 ohm

7 AF out (L) 60mV @ 600 ohm

8 Ground

Note: Values for pins 2, 6, 7 are for a FM 3KHz deviation at antenna input level.

RACK MOUNT

There are four (4) screw holes (unused), two (2) on each side on the cabinet. They are a

provision for rack mount application. Size of the screw is M4 x 8.

8

3 Connections

Connect your antenna to the connector labeled “ANT”, and an external speaker,

if required, to the connector labeled “EXT.SP”. The speaker should have a power handling

capability of 2 watts or greater.

Where possible, use the supplied AC/DC power unit. Connect the supplied power unit to the

wall outlet and its DC cable to the “DC 12V” connector on the rear panel.

4. Power switch

To switch on the SR2000A, press once to latch the switch in.

4-1 Start-up

After connecting the AC/DC power unit, switch on the power switch. The opening screen will

briefly display the AOR logo, model number, firmware version and make a short

“beep” sound. This start-up sequence is a factory default and cannot be altered.

4-2 Powering down

To switch off the SR2000A, press the power switch a second time, the switch releases and

the unit is powered down. Interfering with the regular powering down process might damage

the SR2000A.

5 Operations of the SR2000A

5-1 Display

This section explains what you can expect to see on the SR2000A monitor screen using the

VFO seek mode in the spectrum operation mode.

Once the SR2000A is properly connected, the display will appear on the screen.

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(1) Center Frequency (CF)

The center frequency reading is shown in MHz, and the highest resolution is 10 Hz.

(2) Total displayed bandwidth (SPAN)

The center frequency appears in the middle of the display with the frequency extending

to the left and right. The total frequency spread from the left through center to the right is

referred as the total SPAN. The maximum is 10MHz and minimum is 0.160MHz

(160KHz) in normal span mode. The horizontal scale is divided into 320 increments

(steps).

WSP (Wide Span Mode)

The SR2000A displays up to 40 MHz of spectrum bandwidth (20MHz or 40MHz

selectable) in the wide span mode.

To select the wide span mode, set the SR2000A to the VFO mode. Then press the

FUNC key. A soft key menu will appear on the bottom of the LCD.

[WSP 20M] [WSP 40M] [Video]

On this screen menu, choose either the WSP 20M (Span width 20MHz) mode or the WSP

40M (Span width 40 MHz) mode. To return to the normal span mode, press the FUNC

key again. A soft key menu will be changed.

[to VFO] [WSP 40M] [Video]

Press the to VFO soft key. The center frequency in the WSP mode is transferred to the

VFO mode screen.

Or, press the FUNC key, then press the 4 (VFO) key. The center frequency previously

used in the VFO mode will be recalled.

(No audio is available when the frequency span is set to 20MHz or 40 MHz)

(3) Start Frequency (SF)

The frequency displayed at the bottom left of the screen is the Start Frequency of the

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SPAN.

(4) End Frequency (EF)

The frequency displayed on the right bottom of the screen is the End (Stop) Frequency

of the SPAN.

(5) Seek Mode

The seek mode displays the current operation mode such as VFO mode, Memory Read,

Memory Scan, Search, and FFT Search.

(6) Receiver Information (RFU)

The RFU information is displayed on the top of the LCD screen, and displays the

Monitored frequency, receive mode, frequency step size, signal strength, RF amplifier

status, and attenuator level.

(7) Operating Mode (OP)

Three operating modes are available with the SR2000A.

z Spectrum : Spectrum Analyzer mode

z StepReso.: Step Resolution mode

z Channel : Channel Scope mode (operates only in the VFO mode)

(8) Resolution Band Width (RBW)

Displays the current resolution in KHz. The resolution is selectable from 1 KHz, 4 KHz,

32 KHz, 64 KHz, and 128 KHz. Greater detail is obtained by selecting 4 KHz, often with a

lower baseline while 128 KHz provides faster refresh rates.

Note: If the spectrum frequency span is set between 160 ~ 422 KHz, the RBW is

automatically displayed in 4 KHz.

The RBW is not selectable in the WSP mode. (4 KHz fixed)

(9) MARKER (10) Marker Information

The frequency and strength of signals may be read on the screen. Under the Marker

menu, the peak signal search is also available.

(11) Volume Level (VOL)

Volume level indicator represents the audio output level through the rear panel external

Speaker jack and headphones jack. While this icon is highlighted, the volume level can

be adjusted from 0 to 72 (maximum). Beware of excessive volume levels when using the

headphones.

(12) NSQ/LSQ

Displays the squelch setup. NSQ stands for Noise Squelch and LSQ for Level Squelch.

Levels range from 0 to 72.

(13) Signal level indicator

Received frequencies are plotted on the horizontal scale and signal strength on the

vertical scale, showing the overall effect of signal activity over the given frequency span.

The bottom horizontal line is the ‘baseline’. When signals are entered, they produce

11

vertical lines, and the higher the line, the stronger the signal. A 50 dB range is provided

by the scale which is divided into 10 dB increments. The vertical scale is adjustable in six

levels by altering the internal amplifier (amplitude). The horizontal scale is split into ten

segments indicating the frequency span (bandwidth) in use. The marker is designed to

move across one segment by one full rotation of the dial knob.

(14) Function Key Indicator

When the function key is pressed followed by certain keys, they serve a secondary

function. The secondary function is printed above the respective key. While the function

key is pressed, the reversed FUNC icon appears on the top left corner of the screen.

(15) VFO (Variable Frequency Oscillator)

The SR2000A has a nine (9) VFO system, identified from VFO-A to VFO-I. Displayed on

the previous page example is VFO-A.

Note: Relationship between Frequency Span and Frequency Step

The LCD provides a high resolution of 320 steps from the left to right edges of the screen

X-axis. A frequency bandwidth represented by one step is calculated as SPAN/320.

This is done automatically by the SR2000A in the Spectrum Analyzer and Step Resolution

Modes. This bandwidth differs from the frequency step size displayed in the Receiver

Information (RFU).

Resolution Bandwidth (RBW)

The resolution is selectable from 1 KHz, 4 KHz, 32 KHz, 64 KHz, and 128 KHz. Greater

detail is obtained by selecting 1 KHz, often with a lower baseline while 128 KHz provides

faster refresh rates.

5-2 Key Commands

The SR2000A allows user-friendly operation through 20 main keys, 3 basic operation keys and

3 soft keys. The selected functions are displayed on the LCD screen. The table below

describes the functions allocated to each of the main keys and the basic operation keys.

KEYS FUNCTIONS

1~9, 0 , . (period) As entered

FUNC+1 [FFT] FFT Search

FUNC+2 [SRCH] search mode

FUNC+2 (press & hold) [SRCH] search bank input, settings

FUNC+3 [SCAN] memory channel mode, memory scan

FUCN+3 (press & hold) [SCAN] memory channel input, settings

FUNC+4 [VFO] VFO mode, VFO switch

FUNC+5 [S SCAN] select scan

FUNC+6 [S SET] select memory set

FUNC+7 [PRIO] monitoring priorities

FUNC+7 (press & hold) [PRIO] monitoring priorities settings

FUNC+8 [DEL] deletion of memory channels and search banks

FUNC+9 [CONFIG] SR2000A’s overall configuration

FUNC+. (period) [OFFSET] monitoring offset settings

FUNC+. (period)(press & hold) [OFFSET] frequency settings

FUNC+0 [OBS] operation mode selection

MODE [MODE] receiving mode selection

12

FUNC+MODE [PASS] pass frequency settings

FUNC+MODE (press & hold) [PASS] pass frequency browser

STEP [STEP] step frequency settings

FUNC+STEP [SPN/STP] frequency span, frequency step settings

ATT (press and hold) [ATT] attenuator settings on/off

FUNC+ATT [WATER] waterfall display

RBW [RBW] resolution bandwidth input

FUNC+RBW [OPE] calculation function

CLR [CLR] clear, back space key

FUNC+CLR [A CLR] all clear, erase a sequence

MK.F [MK.F] marker selection, CF settings

FUNC+MK.F [MKR] marker mode selection

KHz [KHz] to validate in KHz

FUNC+ KHz [AMP] amplifier settings

MHz [MHz] to validate in MHz, “enter” key

MHz (press & hold) Input in memory channel

VOL/MUTE Select the dial as a volume knob

VOL/MUTE (press & hold) Mute the audio

FUNC+ VOL/MUTE Mute the audio

SQUELCH / MONI Select the dial as a squelch knob

SQUELCH / MONI (press & hold) Open the squelch

FUNC + SQUELCH / MONI Open the squelch

FREQ. / MKR Select the dial as a frequency tuning knob

FREQ. / MKR (press & hold) Select the dial as a marker tuning knob

FUNC+WSP 20M (Soft key) Select 20MHz of spectrum bandwidth

FUNC+WSP 40M (Soft key) Select 40MHz of spectrum bandwidth

FUNC+ Video (Soft key) Select the video display mode

6 Monitoring Modes

6-1 Basic operations – VFO mode (manual mode)

This describes the SR2000A in the most commonly used VFO mode. This mode allows manual

input of the center frequency.

6-1-1 Setting up the monitoring frequency

The SR2000A follows the rule:

Monitor main frequency (MF) = Center Frequency (CF)

In the Spectrum Analyzer or Step Resolution modes, you can enter the frequency directly

through the numeric keypad, followed by the MHz key to complete the sequence.

In addition, the receiver may be tuned using the dial knob. In the plot below (with the frequency

selected in reverse contrast), the frequency step size that applies the receiver frequency step.

13

RECEIVE MODE FREQUENCY STEP MONITOR FREQUENCY

By pressing the soft key below CENTER FREQ. on the LCD, the center frequency is selected

and can be adjusted using the dial knob.

Key entry of the main frequency:

Enter the frequency in MHz format using the numeric keys, then press the

MHz key to complete.

Frequency Step:

Once the frequency on the LCD is selected, the frequency step that applies is

the receiver frequency step.

If the CENTER FREQ. is selected, the frequency step that applies is the display step.

In the plot on above, the frequency step would be 31.250KHz.

(10 MHz/320=31.250KHz)

This value is not displayed in the Spectrum Analyzer mode.

Rotating the dial knob clockwise increases the frequency, rotating it counterclockwise

decreases it.

In the diagram below, the Step Resolution mode is active. The center frequency

being selected (in reverse contrast), the dial knob now controls the display step.

14

Press the FREQ key to reassign the frequency control to the dial knob.

Start and End Frequency Input

In the VFO mode, the step key enables the step size for tuning the receiver to be

customized. Pressing the STEP key will select the tuning step in reverse contrast. Then

rotate the dial to select a new step size. To confirm the entry, press the MHz key.

There are 13 preprogrammed step sizes as follows:

0.1, 0.5, 1.0, 2.0, 5.0, 6.25, 8.33, 9.0, 10.0, 12.5, 25.0, 50.0, and 100.0 KHz.

In addition, unusual step sizes may be entered by using the numeric keypad in 0.1KHz

increments. Acceptable input range is 0.1KHz to 100KHz.

To enter the main frequency:

Press the FREQ key which will display the frequency in reverse contrast.

To enter the receiver tuning step, press the STEP key. Rotate the dial knob to

select the desired tuning step, and press the MHz key.

You may enter the step frequency by the numeric keypad, and press the MHz

key.

15

6-1-2 Setting up the receive mode

To change the receive mode, press the MODE key. The receive mode icon will be selected (in

reverse contrast) on the LCD to confirm that the mode select menu has been activated.

The following 4 modes are available with the SR2000A: NFM, WFM, SFM, AM.

RECEIVE MODE

Receive mode setup:

Press the MODE key.

Rotate the dial knob to select the desired mode.

Press the MHz key.

IF filter bandwidth for each receiving mode

RECEIVE MODE IF filter bandwidth

WFM 300KHz

NFM 15KHz

SFM 6KHz

AM 6KHz

When an optional APCO25 (P25) board is installed, select the NFM mode to monitor APCO25

(P25) signal in convention mode.

6-1-3 Audio Gain Control

Pushing the VOL key will select the volume indicator on the LCD (in reverse contrast). You can

then adjust the AF gain by rotating the dial knob.

16

VOLUME LEVEL VOLUME INDICATOR

AF gain (volume level) control:

Press the VOLUME key.

Rotate the dial knob to select the desired volume level.

The volume level can be set from level 00 to 72.

To mute he sound, press the FUNC key, then press the VOL key.

(Press and hold the VOL key for one second to do the same.)

To undo the mute, repeat the above steps.

6-1-4 Squelch control

The SR2000A has two (2) squelch types, NSQ (Noise Squelch) and LSQ (Level Squelch).

Pressing the SQUELCH key allows you to select one or the other. Then adjust the squelch

level with the dial knob, from level 00 to 72.

ÅÆ

NSQ selected LSQ selected

Note

In both squelch modes, an “S” icon appears on the left side of the S-meter when the squelch

Is open.

[Note] When LSQ is selected, a white line under the S-meter represents the squelch level

compared to signal strength.

17

Squelch level control:

Press the SQUELCH key.

Rotate the dial knob to select the desired volume level.

The squelch level can be set from level 00 to 72.

6-1-5 RF attenuator and preamplifier settings

The ATT key selects the antenna attenuation level (by reverse contrast). Using the dial

Knob, you can choose between 0dB, 10dB, 20dB. Validate your choice by pushing the

MHz key.

The RF preamplifier can be toggled on and off by pressing the ATT key for one second.

The change is reflected on the screen by RF:ON and RF:OFF.

Change the RF attenuator settings:

Press the ATT key.

Rotate the dial knob to select the desired setting.

Press the MHz key to validate the entry.

Depending on the attenuator setting, general noise floor level on the display may increase.

To toggle the RF amplifier on and off, press and hold the ATT key for one second.

6-1-6 Mute volume and squelch

Muting the AF level can be done in two ways. Either by pressing the FUNC key followed by

the VOL key, or pressing the VOL key for one second. In both cases, the volume level display

turns red to indicate that the sound is muted. To undo the mute, repeat the same steps.

The squelch can also be muted by pressing the FUNC key followed by the SQUELCH key,

or pressing the SQUELCH key for one second.

When muted, the squelch display turns red. To undo the mute, repeat the same steps.

18

To mute the volume:

Press the FUNC key, then press the VOL key. Or,

press and hold the VOL key for one second.

To mute the squelch:

Press the FUNC key, then press the SQUELCH key. Or,

pressing the SQUELCH key for one second.

6-1-7 Input sensitivity (amplitude)

This feature refers to the setup of the input sensitivity level of the SR2000A. There are 6

different levels of input sensitivity between 0dBm and –50dBm in 10dB steps.

Press the FUNC key, then press the KHz key to highlight the reference level (in reverse

contrast). Either adjust the level with the dial knob and validate with the MHz key, or enter

the value with the numeric keys as in the example below for a reference level of –30dBm.

FUNC + KHz

3

MHz

You may ignore zeros “0” following 3 in this example.

Any invalid entry will generate a beep, and the nearest value will be automatically selected

instead.

REFERENCE LEVEL REFERENCE LEVEL

OBSERVATION WITH DIFFERENT AMPLITUDES

6-1-8 Resolution bandwidth (RBW)

The sampling filters may be selected from four (4) different bandwidths of 1KHz, 4KHz,

32KHz, 64KHz and 128KHz.

Press the RBW key to make the RBW display appear in reverse contrast. Rotate the dial

knob to select the desired value followed by MHz key to complete the sequence.

The two plots here show the results from monitoring the same signal (81.3MHz WFM)

but using 4KHz and 128KHz RBW bandwidth respectively. With narrower RBW, finer

signal activity can be observed. With wider RBW bandwidth, the resolution becomes coarse

but it can be better suited for signals with wide bandwidth such as FM broadcast signals.

19

RBW=4KHz RBW=128KHz

Set up the RBW (Resolution Band Width):

Press the RBW key.

Rotate the dial knob to select the desired RBW.

Press the MHz key to validate.

The RBW should be chosen as appropriate for different monitoring requirements.

As the SR2000A employs modern DSP/FFT techniques, there is no difference

in screen update speed regardless of which RBW has been selected. However,

selection of RBW may affect displayed signal strength.

When a signal is displayed which is much wider in bandwidth than the currently

selected RBW filter (for example, WFM or digital transmissions), there will be

some inaccuracy in the signal strength displayed. This is because the wider signal

will lose some of its energy after passing through a narrower RBW filter.

6-1-9 Waterfall display function

The SR2000A is equipped with a waterfall function which can display the variation of signal

strengths in conjunction with the time lapsed (as sweeps progress). Sixteen different

colors are employed dependent on signal strength, in the shape of waterfall.

Press the FUNC key, then press the ATT key to start the waterfall display. To exit the

waterfall display, repeat above steps or press the CLR key.

Note that this function can be used in the VFO mode, memory read mode, and WSP modes.

WATERFALL

DISPLAY

20

Activate the waterfall function:

Press the FUNC key, then press the ATT key.

Signal strength corresponds to the height of each signal in the vertical

scale. Therefore, the color will vary when the input sensitivity

(amplitude) has been altered in the course of monitoring.

Waterfall color corresponds to the vertical height.

Signal display is scrolling downwards as time progresses.

6-1-10 Selecting the operation modes

The SR2000A has 3 different operation modes which can be selected by pressing the FUNC

key followed by the 0 key. The soft keys below the screen give you access to each

corresponding mode. The channel scope mode is only available in the VFO seek mode.

Select the operation mode menu:

Press the FUNC key, then press the 0 key.

Then select one of the three modes by pressing the corresponding soft

key.

Operation modes:

1. Spectrum analyzer mode (Spectrum)

2. Step resolution mode (StepReso)

3. Channel scope mode (Channel)

OPERATION MODE

----------------------- SOFT KEYS --------------------------

21

6-2 Operation Modes

There are three (3) operation modes with your SR2000A. They are the Spectrum

Analyzer Mode, Step Resolution Mode, and the Channel Scope Mode.

To go to the Spectrum Analyzer Mode, press the FUNC key, then press the 0 key.

Then press the Spectrum key on the soft keys.

To go to the Step Resolution Mode, press the FUNC key, then press the 0 key.

Then press the StepReso key on the soft keys.

To go to the Channel Scope Mode, press the FUNC key, then press the 0 key.

Then press the Channel key on the soft keys.

6-2-1 Spectrum analyzer mode

The plot below shows the following signal data:

Center frequency (CF) : 84.0 MHz

Frequency span: 10.0 MHz

Start frequency : 79.0 MHz

End frequency: 89.0 MHz

Step bandwidth: 31.25 KHz (the step bandwidth is not displayed)

In this example, one step represents a bandwidth of 31.25KHz.

(10MHz / 320 = 31.25 KHz)

z Center frequency (CF)

Press the CENTER FREQ. soft key to make the center display readout appear in the

reverse contrast. Enter a desired frequency via the numeric keys followed by the MHz key.

This becomes the center frequency.

z Frequency span (SPAN)

Press the FUNC key, then press the STEP key to reverse the contrast of the SPAN

numeric display. Enter the frequency span over which you wish to monitor, using the

numeric keys followed by the KHz key or the MHz key to confirm the entry. The display

step will be automatically calculated but the value is not displayed on the LCD.

22

z Start and End frequencies

The START and End frequency can be entered in the same manner as the center

frequency entry using the assigned soft keys, numeric keys and MHz key. The dial knob is

not valid for the entry.

[Note]

The CF = MF principle

In the spectrum analyzer mode and the step resolution mode,

Main frequency = Center frequency

When the center frequency is altered using the numeric keys or the dial knob, the main

frequency is changed accordingly. The center frequency becomes the main frequency.

Step bandwidth

In the spectrum analyzer mode, the bandwidth value per step is not displayed on the

LCD.

Displayed frequency span (MHz) is obtained by the following formula:

CF +/- (frequency span / 2)

In the above example, the center frequency is 84.0 MHz. Therefore, the display

frequency span is 84 +/- (10 /2) = 84 MHz +/- 5 MHz.

6-2-2 Step resolution mode

The plot below shows the following signal data:

Center frequency (CF) : 122.50 MHz

Step bandwidth: 25.0 KHz

Start frequency : 118.5 MHz

End frequency: 126.5 MHz

Frequency span: 8 MHz

The frequency span value is automatically calculated by the display step. However, it

does not appear on the screen.

In this example, the chosen step is 25 KHz, the frequency span is

25 KHz x 320 = 8 MHz.

23

[Note] When the center frequency (CF) is selected and controlled with the dial knob,

the monitor main frequency (MF) stays the same on display. In this case,

MF is NOT equal to CF.

Effective frequency coverage

The center frequency (CF) must be within the frequency coverage of the

SR2000A (25MHz ~3000MHz). If exceeded, monitoring is not possible.

Display frequency span (MHz) is obtained by the following formula:

CF +/- (display step x 160)

In the above example, the center frequency is 122.50MHz. Therefore,

122.5 +/- (25 x 160) = 122.5MHz +/- 4 MHz

6-2-3 Channel scope mode

The plot below shows the following signal data:

Start frequency : 82.0 MHz

Display step : 20.0 KHz

End frequency : 85.2 MHz

Frequency span : 3.2 MHz

Main frequency marker : 84.0 MHz

In this mode, neither the frequency span nor the center frequency values appear on the

screen.

z Start frequency (Ch. START)

Press the CH. START soft key (left key below the LCD) to make the start frequency

display appear in reverse contrast. Enter a desired frequency using the numeric keys,

which is the lowest of the frequency spread you wish to monitor, followed by the MHz key

to confirm.

z Step frequency (Ch. STEP)

Press the CH. STEP soft key (middle key below the LCD) to make the frequency display

appear in reverse contrast. Enter the desired step frequency using the numeric keys,

followed by the KHz or the MHz key to confirm.

24

z End frequency (Ch. END)

Press the Ch. END soft key (right key below the LCD) to make the end frequency display

appear in reverse contrast. Enter a desired frequency using the numeric keys, which is the

highest frequency spread you wish to monitor, followed by the MHz key to confirm.

z Marker and main frequency marker operation

When the channel scope mode is activated, monitoring begins on the start frequency.

Press the FUNC key followed by the FREQ. key and rotate the dial knob to move the white

marker onto the signal of your interest, then press the MK.F key. The yellow receive

marker moves to the nominated position and the SR2000A monitors the selected

frequency.

[Note]

The channel scope mode functions only in the VFO mode. Moreover, if the VFO is switched,

setting information will be lost and the operation mode will change to spectrum analyzer

mode

The end frequency (Ch. END) is confined by the following formula:

(Ch. START) + [(Ch. STEP) x 160] or,

(Ch. START) + 5 MHz or,

(Ch. START) + > 0.16 MHz

For this reason, if you do not enter an end frequency, the SR2000A will automatically

select an appropriate end point.

Invalid entry for the end frequency will be alerted with a beep and the closest possible

valid frequency will be automatically chosen by the SR2000A. The same happens with any

invalid frequency entry.

6-3 Marker functions

The SR2000A has a marker function. The marker is often used to obtain the value of a

frequency of interest. In addition to the instantaneous reading, it provides peak detection

and continuous peak detection. Press the FUNC key followed by the MK.F key to place the

SR2000A in marker mode operation.

SOFT KEY ALLOCATIONS IN THE MARKER MODE

INSTANTANEOUS PEAK CONTINUOUS

READING DETECTION DETECTION

The marker function operates in the WSP mode and the memory channel mode (except

MK.F mode).

z Instantaneous reading (Marker : MKR)

This feature is useful for many applications. The marker can be moved sideways by rotating

the dial knob. The LCD displays the frequency and signal strength reading where the marker

is positioned.

25

z Peak detection (Peak : PEK)

This feature is used to detect the most powerful signal while sweeping the frequency range.

Press the PEAK soft key, which in turn requests a trigger level. You need to specify what

level is required. Enter the trigger level via the numeric keys. Only signals which are

stronger than the trigger level you specified will then be subject to peak detection.

The marker will be forced to the position of the strongest signal detected and end its

sweep sequence.

While no signal above the trigger level is received,

the TRIG. WAIT is displayed.

z Continuous peak detection (C-PEAK :CPK)

This function is designed to continue the peak signal detection process one sweep after

another.

Press the C-Peak soft key to activate the function.

There is no trigger level setup in this process.

26

[Note]

[MK.F] key functions:

In the spectrum analyzer and step resolution mode, pressing the MK.F key

forces the marker frequency to become the center frequency.

In the channel scope mode, pressing the MK.F key will not become the

center frequency. The MK.F key cannot be used in the Peak Detection

mode.

6-4 Calculation function

Pressing the FUNC key followed by the RBW key allows you access to three (3) calculation

features: Maximum value hold (MAX), Average value (AVR) and Median (MED) value.

Each function is then accessible through the corresponding soft key below the LCD.

Note this function is available in the WSP mode and the memory channel mode.

z Maximum value hold (MAX)

Press the MAX soft key to access this feature, and the MAX icon will be displayed.

To exit from this feature, press the FUNC key, then press the RBW key, and press the MAX

key.

With the MAX function in use, each sweep will be retained as data and build-up until the

process ends. This is particularly useful to detect intermittent signals which come

and go over a period of time.

27

z Averaged value (AVR range: 2 ~ 31)

Press the AVR soft key to access this feature, and the AVR icon will be displayed.

You are required to enter a sampling cycle between 2 and 31 to produce averaged

results.

To exit from this feature, press the FUNC key, then press the RBW key, and press the

AVR key.

This feature is designed to provide the plot pattern obtained by averaging the signals

received over the sampling cycle. A stable signal pattern is produced even if the signal

is fluctuating in strength.

DISPLAYS AVERAGE VALUE OF 20

z Median (MED range: 2 ~ 4)

Press the MED soft key to access this feature, and the MED icon will be displayed.

The plot is designed to provide signal pattern based over a sampling cycle of

between 2 and 4, and is useful to plot impulse noise. The sampling cycle can be entered

via the numeric keys followed by the MHz key.

To exit from this feature, press the FUNC key, then press the RBW key, and press the

MED key.

[Example]

Display step : 10 KHz, Median : 2, and a frequency of 50 MHz:

50 MHz – 10 KHz = 49990 KHz

50 MHz + 10 KHz = 50010 KHz

The value showed on the dB axis at 50 MHz will be the average of the three values for

the 3 frequencies.

6-5 Video monitor function

The SR2000A has a built-in video decoder and supports NTSC, PAL, and SECAM format.

The video signal format is automatically detected.

28

If the video signal frequency is below 1,000 MHz, then the AM video mode will be

automatically selected.

If the video signal frequency is above 1,000 MHz, then the FM video mode will be

automatically selected.

To activate the video function, perform the following steps:

1. In the VFO mode or the spectrum analyzer mode, set the voice frequency of the video

signal.

2. Press the FUNC key.

3. A soft key menu will appear on the bottom of the LCD.

[WSP 20M] [WSP 40M] [Video]

4. Press the Video soft key.

To return to the normal spectrum analyzer screen, push any soft key.

[Note] Some video transmitters utilizes the reversed frequency shift modulation in order to

set signals scrambled. In this case, the video signal can be descrambled by

performing following steps:

1. In the configuration menu (see Chapter 7, Configuration), select the V.FREQ DIR.

2. Select NORMAL or REVERSE to descramble video signal.

7 Configuration

In this chapter, we learn how to set fundamental operating parameters of the SR2000A.

To access the SR2000A’s configuration menu, press the FUNC key, then press the

9 key.

29

Use the UP and DOWN soft key to move from one section to the other.

Once the desired selection appears in reverse contrast, rotate the dial knob to do any

changes as needed, and press the MHz key to go to the next section. Be aware that your

changes have not been saved so far! Once you have finished the desired configuration

changes, press and hold the MHz key for one second to save all your settings and return

to the screen you were at before entering the configuration.

Press the CLR key to escape from the configuration menu without saving your changes.

You will return to the screen you used before entering the configuration screen.

To access the configuration menu:

Press the FUNC key, then press the 9 key.

Use the UP and DOWN soft keys to go to the desired selection.

Rotate the dial knob to apply changes.

To go to the next selection, press the MHz key.

To save your all changes, press and hold the MHz key for one

second.

To cancel the configuration without saving any changes, press the

CLR key.

z DELAY TIME

Sets the delay in seconds, between squelch closing and scan restart. Default setting is 2.

Setting possibilities are “OFF” (scan resumes immediately), a range from 0.1 ~ 9.9, and

HOLD (does not continue scan).

z FREE

Sets the delay in seconds, between the squelch opening and scan restart. Default setting is

OFF.

Setting possibilities are OFF and 0.1 ~ 9.9. This feature is rarely used and should be set to

OFF.

30

z MKR-OUT (Marker data output)

The frequency and signal level which the marker I reading, can be output as data to the

serial port. “ON” enables this feature. Default setting is “OFF”.

z NTSC/PAL

Select the receive video format to display on the LCD and video out from the rear connector.

Default setting is NTSC.

To receive in SECAM format, select PAL.

z V. FREQ

Select the audio frequency on the video signal to the monitor frequency or the audio signal

frequency (video frequency – 2.645 MHz).

Default setting is AUDIO.

If there is an adjacent interfering signal near the receive frequency and causes the decoding

problem, then set it to AUDIO (video frequency – 2.645 MHz). In that case, select the

V.FREQ DIR to NORMAL.

z V.FREQ DIR

Some video transmitters utilizes the reversed frequency shift modulation in order to

set signals scrambled. If the signal is reversed, select the V.FREQ DIR to REVERSE.

Default setting is NORMAL.

In the AM video mode, select NORMAL.

z V.H-POS

This function is to adjust the horizontal position of the external video monitor.

Default setting is 16.

z V.SYSTEM

Select the video format to NTSC, PAL, or SECAM.

Default setting is AUTO.

To receive in SECAM format, select AUTO or PAL.

z BEEP

The SR2000A emits confirmation “beeps” when the keypad is used. Default is ON.

Beep level is not adjustable.

z PLOT (Drawing mode setup)

Set to PAINT as default. The OUTLINE setting has the monitor only drawing the outline

of the displayed wave.

z DEF-DIAL (Dial automatic return), DIAL-TIME (Dial return timing)

The dial knob is used to tune 4 main functions which are frequency (FREQ), marker (MKR),

Squelch (SQL) and AF gain (VOL). The DEF-DIAL selections allows you to set one of the

31

Four functions as the dial default, to which it returns after a given time. This time in seconds

Can be set with the DIAL-TIME selection, anywhere between 1 and 30 seconds. Default

DEF-DIAL setting is OFF, the dial retains the functions you have assigned to it.

z DATA LINE

Select the PC interface port. Default setting is REMOTE 2 (RS-232C).

z DATA BPS

Used to configure the serial port speed. Following speeds are available:

9600, 19.2k, 38.4k, 57.6k, 115kbps. Default speed is 115kbps.

z BACKLIGHT

Switches the LCD screen backlight on and off.

Caution: Setting the LCD screen to off would render it unreadable, therefore, it is highly

advised to maintain the default in the ON position. The OFF feature is for

professional use of the SR2000A.

[Note]: While accessing the SR2000A configuration menu, the only receiving functions

that can be altered are the AF GAIN (volume) and SQUELCH. To return to the

configuration menu, press the FREQ. key,

7-1 Resetting the SR2000A

If you wish the SR2000A to return to the factory default settings, perform the following

steps: 1. Turn the SR2000A power off.

2. Press and hold the [ 3 ] key and [ 6 ] key simultaneously while turning the power

on.

3. After the LCD displays several flashing, then release the [ 3 ] key and the [ 6 ]

key.

8 Memory Channels

The SR2000A features 1000 memory channels (100 channels in each of the 10 banks).

Press the FUNC key, then press the 3 key to access the “Memory read” mode.

To access the memory read mode:

Press the FUNC key and then press the 3 key.

8-1 Memory read mode

Once you enter the “memory read” mode, the screen looks like the plot below. Be aware

that you cannot enter this mode unless at least one frequency has previously been stored

as a memory channel. (As described in paragraph 8-3).

32

Memory read indicator Memory bank and channel

Memory description text

First, select the desired memory bank and channel using the numeric keys. The first

single digit number will be the bank and second 2 digit number will be the channel.

If you enter an incorrect parameter, an error beep will sound.

Alternatively you can use the dial knob to select the desired bank number and channel.

In case the memory bank/channel indicator is not selected by reverse contrast, press the

FREQ. key. Note that bank switching like that found on a common scanner is not possible.

by the numeric keys:

Example:

You would like to recall the memory bank “0” with the memory channel “09”:

Press the 0, 0, 9 keys

By rotating the dial knob, either left or right, browse through the existing memory

banks/channels.

To select the memory bank/channel by reverse contrast:

Press the FREQ. key.

8-2 Memory scan

To scan the frequencies which are stored in the bank/memory channels, press the

FUNC key, then press the 3 key. As in the plot below, the frequencies of the detected

signals (according to the squelch settings) are listed on the screen. The screen is

overwritten by the 31st frequency. The displayed (maximum 30) frequencies are stored

until the operation mode is changed (such as VFO) or the screen is overwritten with new

frequencies, or the power is switched off.

33

INDICATOR FOR SELECTED FREQUENCY

This memory scan behavior depends on the squelch delay time (between squelch closing

and scan restart) set in the “configuration menu” in paragraph 7. If you wish to bypass

the configured delay settings, press the MHz key to force detection to the next higher

frequency, or press the KHz key to the next lower frequency.

You can pick up any of the detected frequencies and copy it to the VFO screen for live

analysis. To do so, select the desired frequency with the white triangle by using the UP

soft key or the DOWN soft key, then press the SET FREQ. soft key. The VFO mode will

be in the same state as just before you entered in the memory scan mode.

To force the next signal detection:

Press the MHz key for scanning up.

Press the KHz key for scanning down.

To copy a frequency onto the VFO:

Select the frequency with the UP or

DOWN soft keys.

Press the SET FREQ. soft key.

8-3 Programming the memory

In either the VFO mode or the Memory read mode, access the memory programming page

by pressing the MHz key for two seconds, or by pushing the FUNC key followed by the 3

key for one second. Use the UP and DOWN soft keys to scroll through the page.

34

z Bank channel (BANK-CH)

An available bank and memory channel are automatically selected (bank 0 by default, as

long as there are available channels). It is possible to choose another bank/channel with

the numeric keys.

z Frequency (FREQ)

The frequency automatically displayed is the one which was active in your previous VFO

mode. You can input any other frequency with the numeric keys followed by the MHz key.

z Receive mode (MODE)

The automatically displayed receive mode is the one which was active in your previous

VFO mode. You can choose another mode with the dial knob, followed by the MHz key.

z Memory text (TEXT)

If desired, a text of up to 12 characters can be associated with your selected frequency.

Consult the following paragraph 8-4 about how to input.

To select the receive mode:

Rotate the dial knob, and press the MHz key to

confirm.

To save all your selections:

Press and hold the MHz key for two seconds.

To leave this screen without saving any changes:

Press the CLR key.

8-4 Memory text input

A text of up to 12 characters can be assigned to each memory channel. To access the

memory text screen, press the MHz key when the TEXT line is selected by reverse

contrast in the memory programming screen (as plotted in previous paragraph 8-3).

35

SELECTED LETTER

Up To 12 CHARACTERS CAN BE

ENTERED HERE

z Soft keys (<=, DEL, = =>)

The soft keys <= = and = => allow you to go to the previous/next character, while DEL

soft key deletes the selected character.

z Character input

A set of character is assigned to each numeric keys, as displayed on the monitor. For

example, when you press the 2 key, the assigned characters come as follows:

A Æ B Æ C Æ a Æ b Æ cÆ 2 Æ A Æ …..

When a different key is pressed, the cursor goes automatically to the next character.

[Note]: The text input method of the SR2000A is very similar to cellular

phones.

z Saving your changes

To save your text input, press the MHz key, which will bring you to the Memory Programming

Page (previous paragraph 8-3). Remember to press and hold the MHz key again for 2

seconds to save all your changes.

To save your text input:

Press the MHz key.

To leave this screen without saving any changes:

Press and hold the CLR key for 2 seconds.

8-5 Selected memory scanning

The Selected Memory Scanning function allows you to scan only a selection of frequencies

which were previously saved as memory channels. A maximum of 100 channels within a

bank can be scanned.

36

In this example, memory “mem 0-03” is chosen.

z Accessing a selection (S SET)

Once you are in the Memory Read mode screen as plotted above, the selected memory

Scanning mode can be accessed by pressing the FUNC key followed by the 6 key. The

SEL icon will appear on the top of the screen.

z Activating select scan (S SCAN)

Press the FUNC key followed by the 5 key to activate the scanning of the selection you

have previously accessed. There must be at least one channel in the memory bank, for the

scanning mode to function.

You can select any of the detected frequencies and copy it onto the VFO screen for live

analysis. To do so, select the desired frequency with the white triangle by using the UP

or DOWN soft keys, then press the SET FREQ. soft key.

To copy a frequency to the VFO mode screen:

Move the cursor with the UP or DOWN soft keys.

Press the SET FREQ. soft key.

37

8-6 Priority monitor

The priority function enables you to carry on scanning or monitoring while the SR2000A

checks a selected frequency for activity.

z Priority set up (PRIO)

You can access the Priority mode set up screen from either the VFO mode or memory

read mode, by pushing the FUNC key, then push and hold the 7 key for 2 seconds.

First select the memory bank/channel number (using the numeric keys) which contains

the frequency you would like to use it as a priority channel. Then using the DOWN soft

key, decide the interval (in seconds) at which this priority channel should be monitored.

Possibilities are from 1 ~ 20 seconds.

Press and hold the MHz key for 2 seconds to save your settings, or press the CLR key

if you wish to leave without saving.

To save all your selections:

Press and hold the MHz key for 2 seconds.

To leave this screen without saving any changes:

Press the CLR key.

z Engaging the priority channel

` Pressing the FUNC key followed by the 7 key allow you to engage the priority function.

The PRIO icon appear on the top of the screen, indicating that the priority is ON.

The INTERVAL value determines how long the SR2000A will wait between cycles before

re-sampling the priority frequency for activity. If no activity is detected, the receiver returns

to its previous state.

Note: When the SR2000A switches to the priority channel, a switching noise may be heard.

However, it is normal.

38

PRIORITY FUNCTION INDICATOR

9 Frequency Offset

This function enables the received frequency to be quickly shifted by a pre-determined

value which makes it easy to track duplex transmissions or check repeater inputs/outputs.

z Setting up an offset frequency

The frequency offset menu can be accessed by pressing the FUNC key, followed by a two

second press of the . (decimal) key.

Using the numeric keys, the offset frequency can be selected between 0 ~ 999.9999 MHz.

With the DIRECTION soft key specify whether the offset frequency is + or – the main

frequency. To save your settings and to return to the previous screen, press the MHz key.

If you wish to quit without saving, press the CLR key.

, SWITCH BETWEEN + AND – THE VALUE

z Activating frequency offset

Activation is possible only in the VFO mode and the Memory read modes.

Press the FUNC key followed by the . (decimal) key.

The DUP icon will display on the top of the screen to confirm operation.

39

FREQUENCY OFFSET INDICATOR

|

8 MHz SHIFT Press the FUNC key, then press the SQUELCH key

|

| FLASHING

z Monitoring the offset frequency

To access the offset frequency previously set, press and hold the SQUELCH for 2 seconds,

or alternatively press the FUNC key followed by the SQUELCH key.

A flashing DUP icon will show the offset frequency is being monitored.

10 Normal Search and FFT Search

The SR2000A has 40search banks (01-40) to which can be applied Normal Search as well as

FFT Search. In both cases, search bank usage is similar.

10-1 Programming Search banks

To access the Search bank settings menu page, press the FUNC key, then press and

hold the 2 key for two seconds.

Move the cursor to your desired selection with the UP and DOWN soft keys.

z Search bank number (BANK)

Select a bank number between 01 and 40.

40

z Lower frequency limit (L-FREQ)

Enter the search lower frequency limit. Press the MHz key to confirm.

z Higher frequency limit (H-FREQ)

Enter the search higher frequency limit. Press the MHz key to confirm.

z Receive mode (MODE)

Using the dial knob, select the desired receive mode. Then press the MHz key to confirm.

z Frequency step (STEP)

Choose your desired frequency step in KHz with the dial knob. Then press the MHz key to

confirm.

z Bank text (TEXT)

You can name each search bank, as described in paragraph 8-4.

To save all selections:

Press and hold the MHz key for two seconds. After the search bank set up is

completed, the SR2000A will start the normal search.

To leave this screen without saving any changes:

Press the CLR key.

10-2 Normal Search

z Search (SRCH)

Activate the search with the FUNC key followed by the 2 key, and it will start searching in

the frequency range you have specified in the search bank menu (paragraph 10-1).

The two digit bank channel can be changed while search is active.

Search is resumed manually either with the MHz key to go up, or KHz key to go down the

frequency range.

BANK TEXT DESCRIPTION

EXAMPLE OF SEARCH BANK 03 UNDER PROCESS

41

z Nonstop search

If you press again the FUNC key and 2 keys while the search is active (as plotted above),

You will enter the Nonstop search mode.

The SR2000A will continuously search in the frequency range you have specified.

You can exit that mode by repeating the same steps. As the screen can only display

30 frequencies on the screen, new frequencies will overwrite the older ones.

NONSTOP (CONTINUOUS) SEARCH

You can pick up any of the detected frequencies and to the VFO screen for live analysis.

To do so, select the desired frequency with the white triangle by using the UP and DOWN

soft keys, then press the SET FREQ. soft key.

To copy a frequency to the VFO screen:

Move the cursor with the UP or DOWN soft keys. Press the SET FREQ. key.

10-3 Frequency Pass setup

Frequency Pass allows individual frequencies to be passed so they will be skipped over

when in normal search mode (including nonstop search). Each of 40 search banks have

50 pass frequencies for a total of 2000.

IF PASS FREQUENCIES ARE PRESENT IN THE

SEARCH BANK, THE [PASS] ICON APPEARS.

42

While in the Search mode, press the FUNC key followed by the MODE key to access

the PASS mode, then as in the plot above, the frequency 147.86 MHz is selected from

the search result list by the white triangle cursor (with the UP or DOWN soft keys),

and set as a PASS FREQUENCY by pressing the SET FREQ. soft key.

Each bank accepts up to 50 pass frequencies. An error beep will sound if you try to

register more than this maximum.

(Note) 1. Up to 30 out of 50 pass frequencies are displayed on the screen at a time.

2. This function is not available in the FFT search mode.

z Frequency Pass Browser menu

In the VFO mode or the search mode, press the FUNC key followed by a two seconds of the

MODE key press, to access the frequency pass browser screen.

All pass frequencies of the designated search bank will be listed.

z Delete pass frequencies

Use the UP or DOWN soft keys to move the white cursor to the frequency you wish to erase,

and press the DEL soft key to delete the entry.

To leave this screen without saving any changes:

Press the CLR key.

10-4 FFT Search

FFT search differs from regular scanning methods (one frequency / step after the other) in

that It provides a spectrum “image” up to 10 MHz wide, sampled 15 times per second.

10-4-1 Search banks and FFT search

Although the search bank basic step for normal search and FFT search are done the same

way (for L-FREQ, H-FREQ and text settings)，in FFT search, however, the following

43

parameters must also be set.

FFT Frequency step

Threshold level (signal detection level)

10-4-2 FFT search setup

To access the FFT search mode, press the FUNC key, then press the 1 key.

z Search bank selection

First select a search bank (two digits) to access and confirm by pressing the MHz key.

z Frequency step selection

Using the dial knob, select an appropriate frequency step. Then press the MHz key to

confirm the entry.

z Using the threshold level

Set the threshold level with the dial knob. Once set, only signals over this level will be

detected by the FFT search. You can adjust the level by actually looking at the spectrum.

Once the MHz key is pressed, the FFT search will start.

SEARCH BANK NUMBER FFT FREQUENCY STEP THRESHOLD LEVEL

To validate entry:

Press the MHz key.

To quit without saving changes:

Press the CLR key.

10-4-3 FFT Search Results

If FFT search detects a signal stringer than a given threshold level, then the search result

frequencies will be listed as on the example below.

44

Up to 30 frequencies can be listed on one screen. After that, every following result will

overwrite the older ones.

z Color coded signal levels

As the FFT search operates at high speed, and to render the results more understandable,

eight different colors are assigned to different signal intensities. Although this display

information is limited to the frequency and signal level colors, the real power of the SR2000A

is its possibility to output all these data to a PC interface port in a continuous data stream.

[Note]

Format of the Interface data output to PC:

DL-mm RFnn….

(mm: dB level, nn…..: frequency[Hz])

Please refer to the command list for details.

During the FFT search, it is possible to copy any frequency from the search results to the

VFO mode, for further analysis. To do so, use the UP or DOWN soft keys to the white

triangle cursor to the desired frequency, and press the SET FREQ. key to switch to VFO

(you are therefore exiting the FFT search mode).

While the FFT search results are being listed on the screen, you can switch banks by

entering the two digits bank number (this will bring you to the FFT search setup screen).

While the FFT search results are being listed on the screen, by pressing the CLR key you

can return to the FFT search setup screen and modify parameters. Validate each change

45

by pressing the MHz key.

[Caution!]

When FFT search is operating, the resolution bandwidth

(RBW) is automatically set to 4 KHz.

11 Delete menu

The SR2000A allows convenient deletion of search banks, memory banks, memory channels,

pass banks and pass frequencies in one single Delete menu.

To access the Delete menu function, press the FUNC key, then press the 8 key.

As in the plot below, move the cursor to the desired selection with the UP or DOWN soft

keys, then press the DELETE soft key to delete your selection.

THE CONTENTS OF THE PUSH TO DELETE

SELECTION ARE

DISPLAYED

z Search bank (SRCH-BANK)

Use the numeric keys to enter the two digit number of the search bank you wish to delete.

z Memory bank (MEM-BANK)

Use the numeric keys to enter the one digit number of the memory bank you wish to delete.

All frequencies in this bank will be deleted.

z Memory channel (MEM-CH)

Use the numeric keys to enter the three digit of the memory bank/channel you wish to

delete. Only the frequency assigned to this channel will be deleted.

z Pass bank (PASS-BANK)

46

Use the numeric keys to enter the two digit number of the pass bank you wish to delete.

All frequencies in this bank will be deleted.

z Pass frequency (PASS-FREQ)

Use the numeric keys to enter the three digit number of the pass bank/frequency you wish to

delete. Only the selected frequency will be deleted.

Each time you press the DELETE soft key, the screen returns to the previous mode.

To quite the Delete menu without applying changes, press the CLR key.

To access the Delete menu:

Press the FUNC key, then press the 8 key.

To delete entries:

Press the DELETE soft key.

To quit without saving changes:

Press the CLR key.

12 Computer control information

Your SR2000A is fully controllable by PC via the RS-232C serial interface or the USB

interface. No specific hardware interface is required, just a straight RS-232C cable or USB-A

to USB-B interface cable.

The RS-232C port uses a DB-9 connector.

The SR2000A RS-232C specification is as follows:

Baud rate: 9600/19200/38400/57600/115200 bps

Data bits: 8

Stop bits: 2

Parity: None

Flow control: RTS / CTS

Delimiter

PC Æ SR2000A

<CR> (0x0d)

or

<CR><LF> (0x0d 0x0a)

Note: <LF> will be ignored

SR2000AÆ PC

“OK” response when the command has been correct:

<SP><CR><LF> (0x20 0x0d 0x0a)

Response when the command has been incorrect:

? <CR><LF> (0x3f 0x0d 0x0a)

47

Response to the read command:

Following the output of the parameter, the correct response should read:

<SP><CR><LF> (0x20 0x0d 0x0a)

Numerical parameter auto-correct

The SR2000A correct the numerical command parameter to the digit format applying to

the given parameter. In the following example, the DB command has to be followed by

a 3 digit number.

[Example]

The SR2000A will add one or two “0” in order to achieve three digits.

DB3<CR> ----- processed as DB003<CR>

DB03<CR> ---- processed as DB003<CR>

However be aware that for some commands like Memory channel or Search bank, if

You input MQ33 for MQ303 (bank 3, channel 3), the SR2000A would mistakenly correct

your entry to MQ033 which means bank 0, channel 33.

Format of the data output to PC at search and scan:

FFT search

DL-mm RFnn…

Mm: dB level, nn… : frequency [Hz]

Before “mm” be sure to add “-“ (minus)

Normal search and scan

ATn AMn SQn LCxxx RFmmmmnnnnn

Refer to AT, AM, SQ, LC, RF commnds for detail

48

12-1 Command list

Below is the command list for the SR2000A. Each command is explained on the following

pages.

AG AF gain AM RF amp

AT Attenuator AV Arithmetic average value

BL Back light BP Beep sound

CS Channel scope mode CF Center frequency

CM Marker mode DB Level search

DD Delay time DI Dial’s automatic return parameter

DM Calculation function mode DS Serial port speed

DT Dial’s automatic return EF End of frequency

EX Remote off FD High speed data download

FF FFT search FP Spectrum frequency span

FS Spectrum display step GD Graph download

GN Spectrum input sensitivity GR Select memory list read

GA Select memory LC Signal strength output read out

LM Signal strength read out MA Memory channel data read

MB Memory bank delete MC Change marker frequency to CF

MD Demodulation mode ME Median value

MF Marker frequency MI Marker level read out

MO Marker data read MQ Memory channel delete

MR Memory read mode MS Memory scan mode

MU Mute MX Memory data setting

OF Offset OL Offset frequency

OM Operation mode PD Pass frequency delete

PM Spectrum plot image PP Priority monitor setting

PQ Priority function switch PR Pass frequency read

PW Pass frequency setting QS Search bank delete

RF Monitor receive frequency RQ Noise squelch

RS Reset RW Spectrum frequency resolution step

RX RFU status read SC Search/scan stop & non stop

SE Search bank entry & setting SM Select memory scan

SP Free scan SQ Squelch

SR Search bank read out SS Normal search mode

ST Frequency step (except search) SV Copy search data to VFO

TF Start frequency TI Priority interval time

TL Spectrum peak trigger TS FFT frequency step

TT FFT signal bar level VR Firmware version

VX VFO selection & setting WF Waterfall

HV Video output horizontal position NP NTSC/PAL select

RY Step Up/Down SL Serial port select

VO Video decode frequency VS Spectrum/video select

WS Wide band frequency span DV Video decode frequency shift

49

12-2 Command details

AG AF gain

Setup: AGn<CR> nnn = 0 ~ 72 Default : 0

Acquisition: AG<CR> Response value : AGgnn (fixed length)

AM RF amp

Setup: AMn<CR> n = 0 (off), n = 1 (on) Default : 1

Acquisition: AM<CR> Response value : AMn

AT RF attenuator

Setup: ATn<CR> n = 0 (0dB), n = 1 (10dB), n = 2 (20dB) Default : 0

Acquisition: AT<CR> Response value : ATn

AV Arithmetic average value

Setup: AVnn<CR> nn = 2 ~ 31 Default : 31

Acquisition: AV<CR> Response value : AVnn (fixed length)

BL Back light

Setup: BLn<CR> n = 0 (off), n = 1 (on) Default : 1

Acquisition: BL<CR> Response value : BLn

BP Beep sound

Setup: BPn<CR> n = 0 (mute), n = 1 (on) Default : 1

Acquisition: BP<CR> Response value : BPn

CF Center frequency

Setup: CFm.n<CR> m = 25 ~ 3000 (MHz) n for 100Hz designated value

Acquisition: CF<CR> Response value : CFmmmm.nnnn (MHz) (fixed length)

CM Marker mode

Setup: CMn<CR> n = 0 (marker), n = 1 (peak), n = 2 (continuous peak) Default : 0

Acquisition: CM<CR> Response value : CMn

CS Channel scope mode

Setup: CS nnnn.nnnn mmm.mmm kkkk.kkkk<CR>

Values: nnnn.nnnn start frequency (MHz)

mmm.mmm step frequency (KHz)

kkkk.kkkk end frequency (MHz)

Acquisition: CS<CR> Response value : CS nnnn.nnnn mmm.mmm kkkk.kkkk

(Note: This command is available only in the channel scope mode.)

DB Level search

Setup: DBnnn<CR> nnn = 0 ~ 72 Default : 0

Acquisition: DB<CR> Response value : DBnnn (fixed length)

DD Delay time

Setup: DDn.n<CR> n.n = 0 ~ 9.9 (second) FF (hold) Default : 2.0

Acquisition: DD<CR> Response value : DDn.n (fixed length) or DDFF (hold)

(Note: No . (period) is required between n and n when FF is selected.)

DI Main Dial automatic return parameters

Setup: DIn<CR> n = 0 (off)

n = 1 (frequency)

50

n = 2 (marker)

n = 3 (squelch)

n = 4 (volume) Default : 0

Acquisition: DI<CR> Response value : DIn

DM Calculation function mode (spectrum)

Setup: DMn<CR> n = 0 (none)

n = 1 (average)

n = 2 (maximum)

n = 3 (median) Default : 0

Acquisition: DM<CR> Response value : DMn

(Note: This command also resets the operation.)

DS Serial port speed

Setup: DSn<CR> n = 0 (115200bps)

n = 1 (57600bps)

n = 2 (38400bps)

n = 3 (19200bps)

n = 4 (9600bps) Default : 0

Acquisition: DS<CR> Response value : DSn

DT Main Dial automatic return

Setup: DTnn<CR> nn = 1 ~ 30 Default : 10

Acquisition: DT<CR> Response value : DTnn (fixed length)

DV Video decode frequency shift

Setup: DVn<CR> n = 0 (normal)

n = 1 (reversed) Default : 0

Acquisition: DV<CR> Response value : DVn

EF End frequency

Setup: EFmm.nn<CR> m.n = 25.08 ~ 3005 (MHz)

n for 100Hz designated value

Acquisition: EF<CR> Response value : EFmmmm.nnnn (MHz) ( fixed length)

(Note: Depending on the center frequency and the spectrum frequency span, some

values cannot apply.)

EX Remote off

Setup: EX<CR> Command valid only for setup

FD High-speed data download

Acquisition: FD<CR>

The level data of each frequency on the screen can be obtained with the following format.

(one frequency data = 1 byte)

FD<SP><CR><LF><SP><SP><SP>(level data)<SP><SP><SP><CR><LF>

The level data is displayed by the following formula.

The reference level is -100dB (0x20).

(Example) -80dB 0x20+20=0x34 (while 20=0x14)

The data will be converted to ASCII code.

Therefore, the level data is 320.

(Note: When the level data indicates other than 320, the SR2000A is in the channel scope

mode. The level data depends on start, step, and end frequencies.)

51

FF FFT search

Setup: FFmm TSnn TT-kk<CR> FFmm : mm = 01 ~ 40 (search bank number)

TSnn: nn refers to TS

TS-nn: -nn refers to TT

TT-kk: -kk refers to TT

Command valid only for setup

FP Spectrum frequency setup

Setup: FPm.n<CR> m.n = 0.16 ~ 10 (MHz)

n for 1 KHz designated value Default : 10

Acquisition: FP<CR> Response value : FPmm.nnn (fixed length)

(Note: Does not apply with FFT search)

FS Spectrum display setup

Setup: FSm.n<CR> m.n = 0.5 ~ 31.25 (KHz)

n for KHz designated value Default : 31.25

Acquisition: FS<CR> Response value : FSmm.nnn (fixed length)

(Note: Does not apply with FFT search)

GA Select memory

Setup: GAn<CR> n = 0 (release)

n = 1 (registration) Default : 0

Acquisition: GA<CR> Response value : GAn

(Note: This command cannot be used alone, it must be associated with MA, MX or RX

commands. However, in the memory channel mode, this command can be used

alone.)

GD Graph download

Acquisition: GD<CR>

Output the level data of each frequency on the screen.

Response: GD<SP><CR><LF>/<SP><CR><LF>

(Example) F0083.0000L-100<SP><CR><LF>

F0083.0312L-100<SP><CR><LF>

---

F0092.9375L-100<SP><CR><LF>

F0092.9787L-100<SP><CR><LF>

/<SP><CR><LF>

(Note: The separator (/<SP><CR><LF>) has 320 lines. When the level data indicates other

than 320, the SR2000A is in the channel scope mode. The level data depends on

the start, step, and end frequencies.)

GN Spectrum/Video input sensitivity

Setup: GNn<CR> n = 0 (0dBm))

n = 1 (-10dBm)

n = 2 (-20dBm)

n = 3 (-30dBm)

n = 4 (-40dBm)

n = 5 (-50dBm) Default : 4

Acquisition: GN<CR> Response value : GNn

52

GR Select memory list read

Acquisition: GRnn<CR> nn = 00 ~ 99 (channel number)

nn = %% (all channels)

nn must be in two digits format

HV Video output horizontal position

Setup: HVn<CR> n = 0~49 n = 0 (left end of the screen) Default : 16

Acquisition: HV<CR> Response value : HVnn (fixed length)

LC Automatic Signal strength output

Setup: LCn<CR> n = 0 (no output)

n = 1 (output open) Default : 0

Acquisition: LC<CR> Response value : LCn

LM Signal strength read out

Acquisition: LM<CR>

The response value depends on squelch type NSQ or LSQ.

In the NSQ mode: ATx AMy NSQm LMnnn

In the LSQ mode: ATx AMy LSQm LMnnn

ATx: x refers to command AT.

AMy: y refers to command AM.

m = 0 (squelch closed)

m = 1 (squelch open)

nnn = 000 ~ 999

MA Memory channel data read

Acquisition: MAmnn<CR>

m = 0 ~ 9 (bank number)

nn = 00 ~ 99 (channel number)

Response value as follows:

MXmnn GAn RFnnnnnnnnnn MDn SQn ATn AMn TMxx…

MXmnn : m = 0 ~ 9

nn = 00 ~ 99 (channel number)

GAn: n refers to command GA

RFnnnnnnnnnn : nnnnnnnnnn (Hz)

MDn: n refers to command MD.

ATn: n refers to command AT.

AMn : n refers to command AM.

TMxx… : xx… message of maximum 12 letters.

MXmnn represents blank channels.

(Note: Refer to the SQ command for detail.)

MB Memory bank delete

Setup: MBn<CR> n = 0 ~ 9 (bank number)

Command valid only for setup.

53

MC Change marker frequency to center frequency (CF)

Setup: MC<CR> Command valid only for setup.

MD Demodulation mode

Setup: MDn<CR> n = 0 (NFM)

n = 1 (WFM)

n = 2 (SFM)

n = 3 (AM) Default : 0

Acquisition: MD<CR> Response value : MDn

ME Median value

Setup: MEn<CR> n = 2 ~ 4 Default : 4

Acquisition: ME<CR> Response value : MEn

MF Marker frequency

Setup: MFm.n<CR> m.n = 20 ~ 3005 (MHz)

n for 100Hz designated value.

However, m.n will depend on the center frequency and

frequency span. The initial value is as for CF.

Acquisition: MF<CR> Response value : MFmmmm.nnnn (MHz) (fixed length)

MI Marker level read out

Acquisition: MI<CR> Response value: MInnn

Nnn = -99 ~ 0 (dB)

MO Marker data read

Setup: MOn<CR> n = 0 (no output)

n = 1 (output active) Default : 0

Acquisition: MO<CR> Response value : MOn

(Note: When the spectrum is displayed, the commands MF and FD are

sequentially executed every time the spectrum data is updated.)

MQ Memory channel delete

Setup: MQmnn<CR> m = 0 ~ 9 (bank number)

nn = 00 ~ 99 (channel number)

Command valid only for setup.

MR Memory read mode

Setup: MRmnn<CR> m = 0 ~ 9 (bank number)

nn = 00 ~ 99 (channel number)

Command valid only for setup.

MS Memory scan mode

Setup: MSn<CR> n = 0 ~ 9 (bank number)

Command valid only for setup.

MU Mute

Setup: MUn<CR> n = 0 (mute off)

n = 1 (mute on) Default : 0

Acquisition: MU<CR> Response value : MUn

MX Memory data setting

Setup: MXmnn GAn RFnnnn.nnnn MDn ATn AMn TMxx…<CR>

MXmnn: m = 0 ~ 9 (bank number)

54

nn = 00 ~ 99 (channel number)

GAn : n referes to command GA.

It is possible to omit it, in which case it is specified by GA0.

RFnnnn.nnnn (MHz)

MDn : n refers to command MD.

ATn : n refers to command AT.

It is possible to omit it, in which case it is specified by AT0.

AMn : n refers to command AM.

It is possible to omit it, in which case it is specified by AM1.

TMxx… : xx… message of maximum 12 letters. It is possible to omit it.

Command only valid for setup.

NP NTSC/PAL select

Setup: NPmn<CR> m: spectrum screen output

M=0 (NTSC), m=1(PAL)

n : Video decode

n = 0 (NTSC)

n = 1 (PAL)

n = 2 (AUTO) Default : 02

Acquisition: NP<CR> Response value : NPmn

OF Offset

Setup: OFn<CR> n = 0 (offset reception off)

n = 1 (offset reception on) Default : 0

Acquisition: OF<CR> Response value : OFn

OL Offset frequency

Setup: OLxmmm.nnnn<CR> x: + or –

The offset direction is therefore indicated.

mmm.nnnn = 0.0001 (100Hz) ~ 999.9999 (MHz)

Default : 0

Acquisition: OL<CR> Response value : Olxmmm.nnnn

OM Operation mode

Setup: OMn<CR> n = 0 (spectrum analyzer mode)

n = 1 (step resolution mode)

n = 2 (channel scope mode) Default : 0

Acquisition: OM<CR> Response value : OMn

PD Pass frequency delete

Setup: PDmmnn<CR> mm = 01 ~ 40 (search bank)

nn = 00 ~ 49 (channel)

Both bank and channel numbers must be in two

digit format.

Command valid only for setup.

PM Spectrum plot image

Setup: PMn<CR> n = 0 (paint)

n = 1 (outline) Default : 0

Acquisition: PM<CR> Response value : PMn

PP Priority monitor setting

Setup: PPmnn<CR> m = 0 ~ 9 (memory bank)

55

nn = 00 ~ 99 (memory channel)

Acquisition: PP<CR> Response value : PPmnn

PQ Priority function switch

Setup: PQn<CR> n = 0 (off)

n = 1 (on)

Acquisition: PQ<CR> Response value : PQn

PR Pass frequency read

Acquisition: PRmm<CR> mm = 01 ~ 40 (search bank)

Response value : If no frequency is registered in the

PRmm nnnn.nnnn (MHz) list, the only response will be “OK”.

PW Pass frequency setting (normal search)

Setup: PWnnnn.nnnn<CR> nnnn.nnnn (MHz)

If no frequency is specified, the present frequency will be

chosen. Command valid only for setup.

QS Search bank delete

Setup: QSnn<CR> nn = 01 ~ 40 (search bank) Command valid only for setup.

(Note: The pass frequencies inside the search bank will also be

deleted.)

RF Monitor receive frequency

Setup: RFnn.nn<CR> nn.nn = 25 ~ 3000 (MHz)

Acquisition: RF<CR> Response value : RFnnnn.nnnn (MHz) (fixed length)

RQ Noise squelch

Setup: RQn<CR> nn = 0 ~ 72 Default : 0

Acquisition: RQ<CR> Response value : RQnn (fixed length)

RS Reset

Setup: RS<CR> Command valid only for setup.

This command does not delete search bank or memory channels.

The receiver needs to restart after executing this command.

RW Spectrum frequency resolution step

Setup: RWn<CR> n = 0 (1KHz)

n = 1 (4KHz)

n = 2 (32KHz)

n = 3 (64KHz)

n = 4 (128KHz) Default : 2

Acquisition: RW<CR> Response value : RWn

RX RFU (Receiver unit) status read

Acquisition: RX<CR> Response values are as follows:

In the memory channel mode:

MR MXmnn GAn RFmmmm.nnnn STmmm.nn MDn ATn AMn TMxx…

(Unit: RF: in MHz, ST: in KHz)

In the memory scan mode:

MS MXmnn GAn RFmmmmmnnnn STmmmnnn MDn SQn ATn AMn TMxx…

(Unit: RF: in Hz, ST: in Hz)

In the select memory channel mode:

56

SM MXmnn GAn RFmmmmmnnnn STmmmnnn MDn SQn ATn AMn TMxx…:

(Unit: RF: in Hz, ST: in Hz)

In the normal search mode:

SSnn RFmmmmmnnnn STmmmnnn MDn SQn ATn AMn TTxx…

(Unit: RF: in Hz, ST: in Hz)

In the FFT search mode:

FFmm TSnn TT-kk (Refer to command FF)

In the VFO mode:

Vx RFmmmm.nnnn STmmm.nn MDn ATn AMn

(Unit: RF: in MHz, ST: in KHz)

In the WSP (Wide Span) mode:

WSxx RFmmmm.nnn (Refer to command WS)

Refer to each command for details.

RY Step Up/down

Setup: RYn<CR> n = 0 (step up)

n = 1 (step down)

Command valid only for setup

SC Search / scan stop & non stop

Setup: SCn<CR> n = 0 (stop mode)

n = 1 (non stop mode) Default : 0

Acquisition: SC<CR> Response value : SCn

(Note: FFT search is always in non stop mode.)

SE Search bank entry & setting

Setup: SEnn SLnn… SUnn… STnn… MDn ATn AMn TTxx…<CR>

SEnn: nn = 01 ~ 40 (search bank number, always two digits)

SLnnnn.nnnn: search lower end (MHz)

SUnnnn.nnnn: search higher end (MHz)

STnnn.nn: search step frequency (KHz)

MDn : n refers to command MD.

ATn : n refers to command AT.

It is possible to omit it, in which case it is specified by AT0.

AMn : n refers to command AM.

It is possible to omit it, in which case it is specified by AM1.

TTxx… : xx… message of maximum 12 letters. It is possible to omit it.

Each command has to be separated by a blank space.

Command only valid for setup.

SL Serial port select

Setup: SLn<CR> n = 1 (REMOTE 1)

n = 2 (REMOTE 2) Default: 2

Acquisition: SL<CR> Response value : SLn

SM Select memory scan

Setup: SM<CR> Command valid only for setup

SP Free scan

Setup: SPn.n<CR> n.n = 0.0 ~ 9.9 (second)

n.n = 0 for value zero, the free scan is OFF. Default : 0

Acquisition: SP<CR> Response value : SPn.n

57

SQ Squelch

Setup: SQn<CR> n = 0 (noise squelch)

n = 1 (level squelch) Default : 0

Acquisition: SQ<CR> Response value : SQn

SR Search bank read out

Setup: SRnn<CR> nn = 01 ~ 40 (search bank number)

Response value :

SRnn SLnnnnnnnnnn SUnnnnnnnnnn MDn SQn ATn AMn TTxx….

(Note: Refer to the SE command for details.)

SS Normal search mode

Setup: SSmm<CR> mm = 01 ~ 40

The search bank number must always be two digits.

Command valid only for setup.

ST Frequency step (except search)

Setup: STnnn.nnn<CR> nnn.nnn = 0.1 ~ 100.0 (KHz), 6.25 (KHz), 8.33 (KHz)

Default :10

Acquisition: ST<CR> Response value : STnnn.nnn

SV Copy search data to VFO

Setup: SVn<CR> n = 0 ~ 8, n = 0 (VFO-A)

n = 1 (VFO-B)

n = 2 (VFO-C)

n = 3 (VFO-D)

n = 4 (VFO-E)

n = 5 (VFO-F)

n = 6 (VFO-G)

n = 7 (VFO-H)

n = 8 (VFO-I) Default : 0 (VFO-A)

Command valid only for setup.

TF Start frequency

Setup: TFmm.nn<CR> m.n = 20 ~ 2999.92 (MHz)

n for 100Hz designated value

Acquisition: TF<CR> Response value : TFnnnn.nnnn (MHz)

(Note: Depending on the center frequency and the spectrum frequency span, some

value cannot apply.)

TI Priority interval time

Setup: TInn<CR> nn = 1 ~ 20 (second) Default : 5

Acquisition: TI<CR> Response value : TInn

TL Spectrum peak trigger

Setup: TL-nn<CR> nn = 0 ~ 99 Between TL and nn, the minus sign (-) is necessary.

Default : -90

Acquisition: TL<CR> Response value : TL-nn

TS FFT frequency setup

Setup: TSnn<CR> nn = 2 ~ 12,

nn = 2 (5KHz)

nn = 3 (6.25KHz)

nn = 4 (8.33KHz)

58

nn = 5 (9KHz)

nn = 6 (10KHz)

nn = 7 (12.5KHz)

nn = 8 (20KHz)

nn = 9 (25KHz)

nn = 10 (30KHz)

nn = 11 (50KHz)

nn = 12 (100KHz) Default : 6 (10KHz)

Acquisition: TS<CR> Response value : TSnn

TT Signal bar level

Setup: TT-nn<CR> nn = 0 ~ 99 (dB) Between TT and nn, the minus sign (-) is necessary.

Acquisition: TT<CR> Response value : TT-nn

VO Video decode frequency

Setup: VOn<CR> n = 0 (same as audio frequency)

n = 1 (-2.65MHz offset) Default : 0

Acquisition: VO<CR> Response value : VOn

VR Firmware version

Acquisition: VR<CR> The response value corresponds to the version number.

VS Spectrum/video select

Setup: VSn<CR> n = 0 (spectrum)

n = 1 (video) Default : 0

Acquisition: VS<CR> Response value : VSn

VX VFO selection & setting

Set up: Vxn.n Selection: x = A ~ I,

x = A (VFO-A)

x = B (VFO-B)

x = C (VFO-C)

x = D (VFO-D)

x = E (VFO-E)

x = F (VFO-F)

x = G (VFO-G)

x = H (VFO-H)

x = I (VFO-I)

Setup: Vxnnnn.nnnn<CR> x = A ~ I, nnnn.nnnn = 25.0000 ~ 3000.0000 (MHz)

(in 100 Hz step)

WF Waterfall function

Setup: WFn<CR> n = 0 (off)

n = 1 (on) Default : 0

Acquisition: WF<CR> Response value : WFn

WS Wideband span

Setup: WSxx RFm.n<CR>

Xx = 20 (MHz width)or 40 (MHz width)

nnnn.nnnn = 35.0000 ~ 2990.0000 (MHz)

59

13 Specifications

Model: SR2000A

Frequency range: 25 ~ 3,000 MHz

(Cellular blocked for US consumer version)

Receive modes: AM/NFM/WFM/SFM/APCO25(P25) Optional

Receiver configuration: Triple conversion super heterodyne

IF frequency: 1st : 255.3 / 744.3 MHz

2nd : 10.7 MHz

3rd : 455 KHz

Sensitivity: 25MHz ~ 225MHz: NFM: 0.35uV (12dB SINAD)

AM: 0.6uV (10dB S/N)

WFM: 2.0uV (12dB SINAD)

225MHz ~ 1.7GHz: NFM: 0.35uV (12dB SINAD)

AM: 0.8uV (10dB S/N)

WFM: 2.0uV (12dB SINAD)

1.7GHz ~ 2.7GHz: NFM: 0.6uV (12dB SINAD)

2.7GHz ~ 3GHz: NFM: 1.5uV (12dB SINAD)

IP3: 25MHz ~ 225MHz: +1.0dBm

225MHz ~ 1.7GHz: +1.0dBm

1.7GHz ~ 2.7GHz: +1.0dBm

2.7GHz ~ 3GHz: +1.0dBm

S/N: 25MHz ~ 225MHz: 40dB

225MHz ~ 1.7GHz: 35dB

1.7GHz ~ 2.7GHz: 32dB

2.7GHz ~ 3GHz: 30dB

Frequency stability: +/- 1ppm (32 ~ 122 degrees F)

LCD: 5 inches TFT color LCD

Memory channels: 1,000

Search banks: 40

Pass channel memory: 2,000

Priority channel: 1

Operation mode: Spectrum mode,

Step resolution mode,

Channel scope mode

Resolution Band Width: 1, 4, 32, 64, 128 KHz

Input Impedance: 50 ohm

Audio output: 1.2watts (@8 ohm) 10% THD

Speaker: Internal

PC interface: RS-232C or USB

Power requirements: 12 ~ 16V DC @ 1.5 amps (at 1watt audio output)

Control keys: 26,keys, one (1) dial

Operating Temperature: 32 ~ 122 degrees F

Dimensions: 220 (W) x 120 (H) x 195 (D) (mm)

8.7 (W) x 4.7 (H) x 7.7 (D) (inches)

(Projects not included)

Weight: 3.3 Kg (7.4lbs)

All specifications are subject to change without notice or obligations.

60

14 LIMITED WARRANTY

AOR USA, Inc. (AOR) warrants its products as described below:

AOR will repair or exchange equipment as a result of defects in parts or workmanship for a

period of one year from the date of original retail purchase from an authorized AOR dealer.

Exclusions

The following items are not covered by the AOR limited warranty:

1. Products that are damaged through accident, abuse, misuse, neglect, or user

modifications.

2. Problems that arise through failure to follow directions in the owner’s manual.

3. Exposure of the product to adverse or severe weather conditions, including

temperature extremes or water, including rainfall or immersion.

4. Exposure to toxic materials, biohazards, radioactive materials or other contamination.

5. Repairs attempted by parties other than AOR or its authorized personnel.

6. Damage that results from improper installation, including improper voltage and/or

reversed polarity, or exposure of a receiver to signal levels exceeding specifications.

7. Damage resulting through the use of accessories from manufacturers other than AOR.

8. Equipment that has had serial numbers removed or altered in any way.

9. Damage that occurred as a result of shipment. Claims must be presented to the carrier.

10. AOR is not responsible for any costs arising from installation or reinstallation of the

equipment, nor for any consequential (such as loss of use) damage claims.

Obtaining Warranty Service

1. You are responsible for shipping the product to AOR and any related costs.

2. Warranty claim must be accompanied by a legible copy of the original product purchase

receipt.

3. You must include a description of the problem(s) encountered with the product.

4. You must include your name, a valid ground shipping address (including zip code) and

telephone contact information.

5. AOR will ship the repaired (or replaced) product by ground transport.

Limitations

Any and all implied warranties, including those pertaining to merchantability and utility for a

specific purpose are limited to the duration of this limited warranty.

AOR’s limits on warranty pertain only to the repair or, at its option, replacement of defective

products. AOR shall not be liable for any other damages, including consequential, incidental

or otherwise, arising from any defect.

Some states do not allow limitations on how long an implied warranty lasts and may not

allow the exclusion of incidental or consequential damages. As such, the above limitations

may not apply in every case. This warranty gives you specific legal rights and you may have

other rights that apply in your state.

If you have questions about this limited warranty, or the operation of your AOR product,

contact AOR at (310) 787-8615 during normal business hours (9 am ~ 5 pm Pacific Time

Zone), or write to AOR USA, INC., 20655 S. Western Ave., Suite 112, Torrance, CA 90501.

You may also send a fax to AOR at (310) 787-8619. Additional information is available at the

AOR web site: www.aorusa.com/support.html

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We suggest attaching your purchase receipt to this half of the warranty information sheet

and that you keep this information in a secure location.

AOR Model Number __________________________

Serial Number _______________________________

Dealer Name ________________________________

Purchase Date _______________________________

AOR, LTD.

2-6-4, Misuji, Taitok-Ku

Tokyo, 111-0055, Japan

http://www.aorja.com

AOR USA, INC.

20655 S. Western Ave. Suite 112

Torrance, CA 90501, U.S.A.

Phone: 310-787-8615

Fax: 310-787-8619

http://www.aorusa.com

info@aorusa.com

Printed in the U.S.A.

62

AOR USA SR2000A Frequency Monitor User Manual SDU5600

AOR USA Inc. Frequency Monitor SDU5600

User Manual

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