Midland Radio SD171 UHF Data Radio User Manual sd 171 manual FCC
Midland Radio Corporation UHF Data Radio sd 171 manual FCC
users manual
SD-171
Data Radio
User Instruction Manual
2
FCC RF Exposure Compliance Requirements
The Federal Communications Commission (FCC), with its action in General Docket 93-62, November 7, 1997, has adopted
a safety standard for human exposure to Radio Frequency (RF) electromagnetic energy emitted by FCC regulated
equipment. Maxon subscribes to the same safety standard for the use of its products. Proper operation of this radio will
result in user exposure far below the Occupational Safety and Health Act (OSHA) and Federal Communications
Commission limits.
Power listed is conducted. This device must not exceed a maximum transmitting duty factor of 50%. The antenna(s) used
for this transmitter must be installed to provide a separation distance of at least 49cm (19.29 inches) from all persons, must
not be co-located or operating in conjunction with any other antenna or transmitter, and must not exceed a gain of 7 dBc.
Failure to observe these restrictions will result in exceeding the FCC RF exposure limits.
About your SD-170 Series Data Radio
The SD-170 Series of RF Link Modules utilize the latest technology in their designs and manufacturing. SD-170 models are
Phase Lock Loop Synthesizer (PLL) / microprocessor controlled and offer two (2) watts of power with 16-channel capability.
Multiple functions including 1200 to 9600 baud rates, AC and/or DC audio coupling, GMSK, FFSK and FSK modulation are
standard in these fully programmable RF Link Module units. Programmable sub-audio squelch system (CTCSS & DCS)
and two-tone squelch system are added to the signal level detect squelch system (RSSI). GPS Data handling is provided to
interface and control an internal GPS receiver.
To assure satisfaction from the radio, we urge you to thoroughly read the operation and function information in this manual
before operating your SD-171.
Applications of some of the functions described in this manual are determined by the system you use. Your dealer will
program your radio so that you have the greatest number of functions possible relative to your needs.
Should you have questions regarding the operation of the radio, please consult your Dealer.
3
Specifications
GENERAL
Equipment Type ……………………………………………………… Data radio
Performance Specifications…………………………………………TIA / EIA-603 & AS-4295
Band …………………………………………………………………… UHF
Channel Spacings …………………………………………………… 25 kHz, 12.5 kHz programmable
RF Output Power …………………………………………………… 5 watt / 1 watt programmable
Modulation Type …………………………………………………… F2D, F3E
Intermediate Frequency …………………………………………… 45.1 MHz & 455 kHz
Number of Channels ………………………………………………… 16
Frequency Source …………………………………………………… Synthesizer
Operation Rating …………………………………………………… Intermittent
90 : 5 : 5 (Standby: RX: TX)
Power Supply ………………………………………………………… Ext. Power Supply(12 VDC Nominal)
9V - 18.0V DC EXTREME
Temperature Range
Storage ………………………………………………………………… from - 40°C to + 80°C
Operating ……………………………………………………………… from - 30°C to + 60°C
Current Consumption
Standby (Muted) ……………………………………………………… < 65 mA
Transmit 5 Watt(HIGH) RF power ………………………………… < 1.5 A
Transmit 1 Watt(LOW) RF power ………………………………… < 0.7 A
Frequency Bands:
RX TX
VHF : V2 148.000 - 174.000 MHz 148.000 - 174.000 MHz
Lock Time ……………………………………………………………… < 10 mS
TX to RX attack time ………………………………………………… < 20 mS (No Power Saving)
RX to TX attack time ………………………………………………… < 20 mS
Dimensions…………………………………………………………… (32 mm)H x (58 mm)W x (125 mm)D
Weight ………………………………………………………………… 253 grams
4
TRANSMITTER Specification
Carrier Power: ………………………………………………………… Nom. Max. Min.
High …………………………………………………………5W < 6W > 4.5W
Low …………………………………………………………1W < 1.5W > 0.8W
Sustained Transmission …………………………………………… Nominal conditions
Time : 5 10 30 Sec.
Power: >90% >85% >80%
Frequency Error ……………………………………………………… ±5.0 ppm Extreme condition for UHF
Frequency Deviation:
25 kHz Channel Spacing…………………………………………… Peak ±5.0, Min. ±3.8
12.5 kHz Channel Spacing………………………………………… Peak ±2.5, Min. ±1.9
Audio Frequency Response………………………………………… Within +1/-3dB of 6dB octave
@ 300 Hz to 2.55 kHz for 12.5 kHz C.S.
@ 300 Hz to 3.0 kHz for 25 kHz C.S.
Adjacent Channel Power
25 kHz ………………………………………………………………… < 70 dBc @ Nominal Condition
< 65 dBc @ Extreme Condition
12.5 kHz ……………………………………………………………… < 60 dBc @ Nominal Condition
< 55 dBc @ Extreme Condition
Conducted Spurious Emission …………………………………… < -60 dBc
Modulation Sensitivity ……………………………………………… 100mV RMS @ 60 % Peak Dev.
Hum & Noise:
25 kHz Channel Spacing …………………………………………… > 40 dB (with no PSOPH)
12.5 kHz Channel Spacing ………………………………………… > 40 dB (with PSOPH)
Modulation Symmetry ……………………………………………… < 10 % Peak Dev @ 1 kHz input
for nominal dev +20dB
Load Stability ………………………………………………………… No osc at ≥ 10:1 VSWR all phase angles and suitable
antenna
No destroy at ≥ 20:1 all phase angle
Peak Deviation Range Adjustment @ 1 kHz, Nom. Dev +20dB:
25 kHz Channel Spacing …………………………………………… Min. 3.5, Max. 6.0
12.5 kHz Channel Spacing ………………………………………… Min. 1.5, Max. 4.0
5
RECEIVER Specification
Sensitivity (12dB Sinad) …………………………………………… Standard B.W < -118 dBm, Narrow B.W <-117 dBm
@ Nom. Condition
Standard B.W < -115 dBm, Narrow B.W <-114 dBm
@ Extreme Condition
Amplitude Characteristic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < ±3 dB
Adjacent Channel Selectivity:
25 kHz Channel Spacing …………………………………………… > 70 dB @ Nom., > 60 dB @ Extreme Condition
12.5 kHz Channel Spacing ………………………………………… > 60 dB @ Nom., > 50 dB @ Extreme Condition
Spurious Response Rejection …………………………………… > 70 dB (100 kHz - 4 GHz)
Image Response ……………………………………………………… > 70 dB
IF Response…………………………………………………………… > 70 dB
Others. ………………………………………………………………… > 70 dB
Intermodulation Response Rejection:
±25 kHz/ 50 kHz ……………………………………………………… > 70 dB
±50 kHz/ 100 kHz …………………………………………………… > 70 dB
Conducted Spurious Emission @ Nominal Conditions:
9 kHz - 1 GHz ………………………………………………………… < -57 dBm
1 GHz - 4 GHz. ………………………………………………………… < -47 dBm
RX Spurious Emissions (Radiated) @ Nominal Conditions
9 kHz - 1 GHz ………………………………………………………… < -57 dBm
1 GHz - 12.75 GHz …………………………………………………… < -47 dBm
AF Distortion. ………………………………………………………… < 5% @ Nom., < 10 % @ Extreme condition
RX Hum & Noise:
25.0 kHz CP …………………………………………………………… < 40 dB No PSOPH
12.5 kHz CP …………………………………………………………… < 40 dB with PSOPH
Receiver Response Time …………………………………………… < 16 mS
Squelch Opening Range: …………………………………………… RF level for 6 to 14 dB Sinad
Squelch Closing Range (Hysteresis): …………………………… 0 - 6 dB Sinad @ Nominal Condition
Squelch Attack Time:
RF Level at Threshold ……………………………………………… < 40 mS
RF Level at Threshold + 20 dB …………………………………… < 30 mS
Squelch Decay Time ………………………………………………… 5 mS Min., 20 mS Max.
Antenna Socket Input Match ……………………………………… > 10 dB Return Loss
L.O. Frequency Temperature Stability …………………………… 1st < 5 ppm, 2nd < 15 ppm from -30° to + 60° C
L.O. Frequency Aging Rate ………………………………………… ±2 ppm/ year
6
Unpacking information
Remove and carefully inspect the contents of your package(s) for the following items:
Radio
Fused power cord
User manual
If any items are missing, please contact the dealer from which you purchased the radios, or contact us at phone number 1-
816-241-8500 or Fax. 1-816-241-5713.
SD-171 Features
• Synthesized Operation with 16 channel capability
• 1 / 5 Watt programmable output power
• Programmable 12.5 / 25KHz channel spacing
• Channel scan
• Busy channel lockout
• Tx Time-out timer
• Power Save
• Marked Idle
• Tx Delay
• Data transmission and reception through GMSK modem
• Data transmission and reception through FFSK modem
• Support transmission of global position data
7
Description of radio components
Antenna connector
DB-15 connector
Power connector
GPS Antenna connector (option)
LED (Busy / Tx indicator)
Exterior View
RV402
RV401
SW401
maxon
RV403
CON407
12
34
5
7
6
Digital Board
Antenna installation
Fasten the antenna to the radio by turning the antenna cable clockwise into the receptacle on left of radio when looking at
front of radio.
8
Powering the data radio
Your data radio accepts many sources of DC power to permit more versatile use. This radio operates from 9V to 18V DC
and standard voltage for test is 12V DC.
Connecting the data radio to DC power
Connect DC power plug of power cable to radio’s DC IN power connector and then fasten power plug to the radio by
turning the ring clockwise.
9
SD-170 Series Operation
Channel select / SCAN
Your radio’s channel can be selected by inner DIP-S/W or serial command inputted from external control system. To
change channel by inner DIP-S/W (), you should open the upper cover and then look for the DIP-S/W() on the digital
board of the bottom cover. Once located change the DIP-S/W to select wanted channel according to channel dip switch
chart.
To use a serial command for channel selection, it should be inputted by external equipment or device(ex. Personal
computer) through Pin 8 of DB-15 connector. See the message format for serial command for full details.
If your radio has been programmed the channel scan, you must enter the scan mode by serial command.
Transmit
The transmission will be made by various inputs such as PTT signal (Pin 3 of DB-15 connector), TX serial command and
Serial data input (Pin 10 of DB-15 connector : This input is only available when a modem option board is installed). TTL
level is used as PTT signal and is active low. If you installed an option modem board, you can use RS-232 level as a PTT
signal instead of TTL level. To maintain transmission, continuous PTT signal input is required. If you use Tx serial
command for transmission, normally, it’s released by Rx serial command. Before the transmission, check the color of the
radio’s top-panel LED(). It will glow orange if RF activity is present; it will not be illuminated if the radio indicates a “clear”
channel. When the channel is “clear”, input the PTT signal or Tx serial command and transmit data or audio. Remove the
PTT signal or input Rx serial command when you have finished transmission.
CAUTION : Operation of the transmitter without a proper antenna installed may
result in permanent damage to the radio.
Receive
When you have finished transmission, remove the PTT signal or input Rx serial command. You will receive data from
another radio or hear another person talking from the connected external speaker.
10
Scan modes
Scanning is a dealer programmable feature that allows you to monitor a number of channels. Your dealer will help you
define a scanning mode and your channel “scan list”
Channel scan
Once the scan list has been established, initiate scan by serial commands. If a conversation is detected on any of the
channels in the scan list, the radio will stop on that channel and you will be able to hear the conversation. At that time, busy
channel data is sent to external equipment or device through serial command. So, you can identify busy channel data as
decoding of received serial command from your radio in the external equipment or device.
Normally, if you try to transmit during scanning, the transmission will be made on the channel that the call was received
during the programmable scan delay time. (The scan delay time is the amount of time the radio will stay on that channel
once activity has ceased. Dealer programming of 4 ~ 7 seconds is typical). The radio will resume scanning once the scan
delay time has expired, and will continue to scan until the serial command for scan stop is inputted by external equipment.
After the scan resumes, if a transmission is made, the radio will transmit on the selected priority channel. This feature is
similar to priority scan TX except for selection of priority channel. You can assign a priority channel by inner dip switch only.
Scan channel delete
To temporarily delete a channel from the scan list, simply input the serial command for scan deletion to the radio while
scanning and stopped on the channel to be deleted. This will temporarily remove that channel from the scan list until the
scan is closed or the radio’s power is reset.
CTCSS / DCS Scanning
To help to block out unwanted calls to your radio, the SD-170 series can be programmed by your dealer to scan for tones.
11
Channel dip switch chart
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
1
16
234
5678
9101112
151413
SW401
CHANNEL SELECT SWITCH
CHANNEL NO.
SWITCH POSITION
Serial command
Serial RX/TX Data Format
(1) Asynchronous Serial Data Transfer
(2) Baud Rate : 4,800 bit/sec
(3) Data Bit : 8bit , Non Parity
(4) Stop Bit : 1bit
(5) MSB first transmission
Each serial command is consist of 3 bytes.
1st byte is command and 2nd is data required by command and 3rd is check sum to decide validity of total contents.
Byte0
ST 1st Byte (Command) SP
Byte1
ST 2nd Byte (Data) SP
Byte2
ST 3rd Byte (Check Sum) SP
12
Data Protocol
Protocol for input Serial command
Protocol of data transmission from external equipment or device (: PC) to radio :
Input serial command
Receive response
Response
External equipment or device Radio
Protocol for output data
Protocol of data transmission from radio to external equipment or device (: PC) :
Receive Data
Receive Data
Output Data
(with command)
External equipment or device Radio
Output Data
(with command)
Serial Commands
Transmit Command & data
Mode Transmit
Command
(BYTE0)
Transmit data( BYTE1 ) Check sum( BYTE2 )
: Transmit Command + data
1. Channel Change 0x64 0x?? :Current channel ( 0x64 + Channel )
2. RTX Mode Send. 0x61 R(0x72) : Rx mode
T(0x74) : TX mode
( 0x61+0x72 )
( 0x61+ 0x74 )
3. Scan
Mode
From PC
To Radio
0x62 F(0x46) : Scan Stop
S(0x73) : Scan Start
O(0x4F) : Scan Delete
( 0x62+ 0x46 )
( 0x62+ 0x73 )
( 0x62+ 0x4F )
13
From Radio
To Pc
0x66 0x00 : 1 Channel
0x01 : 2 Channel
0x02 : 3 Channel
0x0f : 16 Channel
0x66 + 0x00
0x66 + 0x01
*Only for Unmute Channel,
Correct Call Channel
Error
Message
0x65 It occurs when Scan Delete command comes except
for Busy/Correct Call
It occurs when PTT key is pushed except for
Busy/Correct Call.
It occurrs when channel change command exists
during Scanning.
Control of
GPS Power
0x6a 0x00 : GPS Power Off
0x01 : GPS Power On
( 0x6a + 0x00 )
( 0x6a + 0x01 )
4.
GPS
mode Control of
GPS Data
0x63 0x00 : GPS Data Disable
0x01 : Release GPS Data
to DB-15
0x02 : Release GPS Data
to Modem
( 0x63 + 0x00 )
( 0x63 + 0x01 )
( 0x63 + 0x02 )
5. Modem test mode 0x75 0x78 : Enable test data
0x79 : Disable test data
( 0x75 + 0x78 )
( 0x75 + 0x79 )
GMSK 0x7a 0x00 : Disable
0x01 : Enable
( 0x7a + 0x00 )
( 0x7a + 0x01 )
0x7c 0x00 : Disable
0x01 : Enable Mark data
( 0x7c + 0x00 )
( 0x7c + 0x01 )
6.
Modem
alignment
mode FFSK 0x7e 0x00 : Disable
0x01 : Enable Space data
( 0x7e + 0x00 )
( 0x7e + 0x01 )
Receive Command & data
Mode Transmit
Command
(BYTE0)
Transmit data ( BYTE1 ) Check sum( BYTE2 )
: Transmit Command + data
0xaa ACK 1 Process Complete
Commands 0x55 NACK
Note)
This command is return signal for receiving command.
If Byte2 and sum of Byte0 and Byte1 among received data are same, Radio would send ACK data and execute
command. If not, Radio sends Nack data.
User would go into next step if receives ACK data. If user receives Nack data, user should send command again.
example) If user changes from 1st Channel to 2nd Channel,
User should send Channel Change Command ( 0x64,0x02 , ( 0x64 + 0x2 ) ) to Radio.
If Byte2 and sum of Byte0 and Byte1 among received data are same, Radio sends ACK data to user and
changes to 2nd channel. If not, Radio would send Nack data.
14
Status indicators and audible alert tones
Your SD-170 series data radio has a sophisticated microprocessor control which provides a range of LED displays. LED
displays operation mode, current status of radio, warning, and etc. Moreover, if you connect the Speaker filtered OUT (Pin
9 of DB-15 connector) to an external speaker, you can hear audible tones at the following conditions:
• Attempt to transmit on a channel that is already in use when busy channel lockout has been programmed into the radio
• Transmission time has exceeded time-out timer programmed length
• When the other group or people finished transmission using repeater
See the status indicators and audible alert tones chart for full details.
STATUS DESCRIPTION LED COLOR AUDIBLE TONE
POWER ON Green-Yellow-Red
Busy Channel Yellow
Correct Call Green
Transmit Red
NORMAL
Transmit Not Allowed
Normal Scan Mode Green LED Flash
Scan Delete One time Red LED
SCANNING
Scan All Delete Two times Red LED
Busy Channel lockout Two times Green LED Single Beep Tone
Time out Time One time Green LED
Before 5S T-O-T One time Green LED Single Beep Tone
EEPROM Error One time Yellow LED
Unlock Four times Yellow LED
Communication error with Modem
MCU
Green LED flash
Transmit Hang on time - Single Beep Tone
WARNING
Under channel programmed sub-
audio SQ, when transmission is
tried by input of FSK or GMSK
data.
Two times Green LED
Read Mode Red LED flash
PROGRAM Write Mode Green LED flash
AUTO TEST Yellow
Open Squelch Mode Three times Green LED
Close Squelch Mode Two times Green LED
Save Squelch Mode One time Green LED
SQUELCH PROGRAM
MODE
Init Data Load One time Green LED
15
DB 15 PIN descriptions with input/output level
D-Type
Pin No.
Function Description Signal Type Input/
Output
1 Data modulation IN
(Tx Mod)
Signal is directly injected to MOD through data
low pass filter without pre-emphasis.
Analog signal
1KHz audio at 60%
peak system deviation
input level =
100 to 120mVrms
I/P
2 Data unfiltered OUT
(RX disc)
Discriminator audio from the SD-170. This is
the unprocessed AF signal prior to tone
filtering and de-emphasis.
Analog signal
1KHz audio at 60%
peak system deviation
produces
200 to 300mVrms
O/P
3 PTT In
(Tx Key)
Signal from the ‘external device’ to key the
SD-170 transmitter.
This line has an internal pull up resistor to +5V.
Pulling the line to 0V turns on the transmitter.
Note : If you installed option modem board,
you can select RS-232 signal level by
Jumper (CON407, ) on the digital board.
TTL level
0V = Tx
o/c = Rx
RS-232 level (option)
+12V = Tx
-12V = Rx
I/P
4 Ground Ground connection to chassis of the radio. 0V (Chassis)
5 Serial Data Out
(TXD)
Serial data output for radio control or program.
It uses asynchronous data format.
TTL level O/P
6 Busy
(CD)
Logic level output from SD-170 to indicate
whether a carrier is present or not
Note : If you installed an option modem
board, you can select RS-232 signal level
by Jumper (CON407, ) on the digital
board.
TTL level
0V = carrier
5V = no carrier
RS-232 level (option)
+12V = carrier
-12V = no carrier
O/P
7 Microphone filtered
audio IN
This signal is injected to the MOD at the point
through audio-amplification, pre-emphasis and
high pass filtering where sub-audio tone is
mixed with audio.
Audio
1KHz audio at 60%
peak system deviation
input level =
6 to 8Vrms
I/P
8 Serial data IN
(RXD)
Serial command or data input for radio control
or program. It uses asynchronous data format.
TTL level I/P
9 Speaker filtered OUT Audio output from the audio amplifier.
It’s filtered by tone-filter, de-emphasis circuit.
Audio
1KHz audio at 60%
peak system deviation
produces Nominal
1Vrms @ 8Ω
O/P
10 Serial data IN for
option modem
The Serial data to be transmitted is input to
this pin. It’s only available when option modem
board is installed. Inputted data are modulated
by modem IC and then injected to MOD.
It uses asynchronous data format.
RS-232 level I/P
11 Serial data Out for
option modem
The recovered asynchronous serial data
output from the receiver. It’s only available
when option modem board is installed. It uses
asynchronous data format.
RS-232 level O/P
12 Serial data busy for
option modem
(reserved)
To eliminate data loss according to buffer
overrun of slave MCU’s memory, it indicates
buffer status.
RS-232 level O/P
16
13 GPS data input Data input for initial setting of GPS module.
It follows NMEA 0183 format and uses
asynchronous data format.
TTL level I/P
14 DGPS data input Data input for DGPS Correction of GPS
module. It follows NMEA 0183 format and
uses asynchronous data format.
TTL level I/P
15 GPS data output Position data output from the GPS module. It
follows NMEA 0183 format and uses
asynchronous data format.
TTL level O/P
17
Modem option for data communication
DESCRIPTION
The ACC-513 and ACC-514 are internal option-modems, which are applied to the SD-170 series to increase capability for
data applications. The goal of an internal modem is to improve the efficiency for data transmission and provide maximum
flexibility for user applications. The most obvious method of increasing the data efficiency is to maximize the data signaling
speed in the limited channel bandwidth. But, FSK, called direct FM modulation, has a very wide transmission bandwidth
requirement. To solve this problem a GMSK(Gaussian Filtered Minimum Shift Keying) internal option-board can be used.
Generally data has a wider bandwidth than audio. So, direct application of data is not matched with an audio system and its
application. For instance, if sub-audio (Tone) SQ system applied to a data application, its frequency conflicts with that of
sub-audio. Moreover, the inputted data is filtered by the audio filter circuit resulting in broken data transmission. To
overcome these problems and provide maximum flexibility, an FFSK(Fast Frequency Shift Keying) internal option-board
can be used.
COMMUNICATION BETWEEN DTE AND OPTION-BOARD
Our internal modem options consist of Slave MCU, Modem IC, and extra circuitry. These option-boards directly
communicate with DTE (Data Terminal Equipment) to send and receive meaningful data through the DB-15 connector on
the digital board of the SD-170. These modems are designed to accept RS232 serial data format and are also capable of
high speed wireless data-transmission between two or more devices. More detailed information for the modem option
boards is given in the technical manual for the ACC-513/514. Your dealer will help you define a TX On/Off delay time, RX
On delay time, Baud Rate, Modem Enabled, Modem Baud Rate, Data flow control, and Test Mode.
Table for modem speed
Channel Space DTE Baud Rate Modem Baud Rate
1200 1200
Narrow (12.5KHz) 2400 2400
1200 1200
2400 2400
Standard (25KHz)
4800 4800
Table 1. Available Baud rate for FFSK modem
18
Channel Space DTE Baud Rate Modem Baud Rate
Narrow (12.5KHz) 4800 4800
4800 4800
Standard (25KHz) 9600 9600
Table 2. Available Baud rate for GMSK modem
Transmission GPS Data through Modem
The SD-170 supports GPS data handling. That may help your implementation for a system related to GPS. If it is not
enough for your application, received position data from the GPS module placed in an SD-170 can be reprocessed by your
own application. The ACC-515 is a GPS module for the SD-170, which releases 11 different output data according to the
NMEA-0183 format, which can be selected by you, the available data should be processed by your application. Received
data from the ACC-515 will be released via the DB-15 connector of the SD-170 and/or transmitted to another system
through an installed modem. More detailed information for the GPS option board is given in the technical manual for the
ACC-515.
19
Option board pin-out chart
FFSK Modem Option board
Connector
No.
Pin
No. Function Description
Input/
Output
1 VCC 6V to 12V Power Input I/P
2 GND Ground
3 PTT Signal from the digital board to transmit data key the SD-
170 transmitter I/P
4 TXD_EN It ensures that the radio has stabilized in transmission
before the data is processed for modulation. I/P
5 TX_END To finish transmission, it indicates memory buffer of Master
MCU of digital board is empty. O/P
6 MUTE
(Busy)
Logic level input from digital board to indicate whether a
carrier is present or not I/P
7 MODEM_EN Modem Enable input I/P
8 POWER_SAVE Power save input for modem board. I/P
9 CMD_EN It indicates that command for Modem programming is
effective. I/P
10 CMD_IN/OUT Data Input and Output for Modem programming. I/P,
O/P
11 CMD_CLK Clock Input for Modem programming. I/P
12 MODEM_SEL It Indicates modem type to Master MCU for programming. O/P
13 RX_IN The FFSK/MSK signal input for the receiver of modem IC. I/P
Connector 1
14 TX_OUT The FFSK/MSK signal output when the transmitter is
enabled. O/P
1 Serial_IN The Serial data to be transmitted is input to this pin. I/P
2 Serial_OUT The recovered asynchronous serial data output from the
receiver. O/P
3 Busy To eliminate data loss according to buffer overrun of slave
MCU’s memory, it indicates buffer status. O/P
4 Carrier_Detect Handshake signal for RTS control mode. It indicates
whether Slave MCU of modem has decoded data or not. O/P
5 PTT_IN Handshake signal for RTS control mode. It requests data
transmission to Slave MCU of modem. I/P
Connector 2
6 PROGRAM It’s reserved input for firmware upgrade. I/P
20
GMSK Modem Option board
Connector
No.
Pin
No. Function Description
Input/
Output
1 VCC 6V to 12V Power Input I/P
2 GND Ground
3 PTT Signal from the digital board to enable transmitter circuit of
modem board. I/P
4 TXD_EN It ensures that the radio has stabilized in transmission
before the data is processed for modulation. I/P
5 TX_END To finish transmission, it indicates memory buffer of Master
MCU of digital board is empty. O/P
6 MUTE
(Busy)
Logic level input from digital board to indicate whether a
carrier is present or not I/P
7 MODEM_EN Modem Enable input I/P
8 POWER_SAVE Power save input for modem board. I/P
9 CMD_EN It indicates that command for Modem programming is
effective. I/P
10 CMD_IN/OUT Data Input and Output for Modem programming. I/P,
O/P
11 CMD_CLK Clock Input for Modem programming. I/P
12 MODEM_SEL It Indicates modem type to Master MCU for programming. O/P
13 RX_IN The GMSK signal input for the receiver of modem IC. I/P
Connector 1
14 TX_OUT The GMSK filtered Tx output signal. O/P
1 Serial_IN The Serial data to be transmitted is input to this pin. I/P
2 Serial_OUT The recovered asynchronous serial data output from the
receiver. O/P
3 Busy To eliminate data loss according to buffer overrun of slave
MCU’s memory, it indicates buffer status. O/P
4 Carrier_Detect Handshake signal for RTS control mode. It indicates
whether Slave MCU of modem has decoded data or not. O/P
5 PTT_IN Handshake signal for RTS control mode. It requests data
transmission to Slave MCU of modem. I/P
Connector 2
6 PROGRAM It’s reserved input for firmware upgrade. I/P
21
GPS Option board
Pin
No. Function Description
Input/
Output
1 VCC 6V to 12V Power Input I/P
2 VBAT Backup Power Input (3.3V) I/P
3 ENABLE GPS Data Out Enable I/P
4 PSAVE GPS Power Enable (& Power save input for GPS) I/P
5 GND Ground
6 GPS_OUT Position Data Output O/P
7 DGPS_IN DGPS Correction Data Input I/P
8 GPS_IN Initial Setting Data Input I/P
9 +5V 5V Power Input I/P
Compatible accessory list
ACC-513 9600 baud GMSK modem
ACC-514 4800 baud FFSK modem
ACC-515 GPS receiver
ACC-160 GPS antenna
ACC-516 PCB Interface - used to separate digital and RF board for alignment
ACC-916 Personality programming software
ACC-2016 Individual programming cable