KP Electronic Systems KPBSR100 VHF Base Station Radio TX User Manual users manual 1

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Document Description	users manual 1
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Date Submitted	2001-10-31 00:00:00
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KP ELECTRONICS SYSTEMS
FCC 1D : H78KPBSR100
JOB # : 599AU1
EXHlBlT#: ‘QA— I9~G~
563W? 66
VHF Base-Station Radio Transceiver
Service Manual
K ELECTRONIC
SYSTEMS LTD
ISRAEL Office USA Office: KP ELECTROMCS, INC.
E—mail: inffikgmlemsfiom E-mail: kgelectron anlxum
PO Box 42, Tefen Industrial Park. Tefcn 24959 109 Tudor Drive, North Walm PA 19454
Tel: 9724333745955 I Fax: 97249874692 T . (215) 542-7460 / Fax: (215) 542-7461
P.N.: Book XX Rem NEW Approved VladD 30,0501
ELECTRONIC
SYSTEMS LTD '
NOTICE
The infomiation in this document has been carefully checked and is considered
reliable. No responsibility is assumed for inaccuracies.
KP ELECTRONIC SYSTEMS LTD. reserves the right to introduce changes in its
products to improve reliability, fimction or design.
KP ELECTRONIC SYSTEMS LTDi does not assume any liability arising from
the application or use of any ofits products or any product described in this
document, nor does it convey any license under its patent rights or the rights of
others.
This document contains proprietary information and may not be reproduced in
any form without prior written consent of KP ELECTRONIC SYSTEMS LTD.
Copyright 1994 by KP ELECTRONIC SYSTEMS LTD., PO. Box 42, Tefen
Industrial Park, Tefen 24959, Israel
FCC INFORMATION TO USER
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against hamifiil interference when the equipment is
operated in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, ifnot installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at
his own expense.
UNPACKING THE BSR100
' Carefully unpack the BSRIOO and inspect for external damage that might have
been caused during shipment. If there is any apparent damage, replace the unit in
its original packing and contact KP ELECTRONIC SYSTEMS LTD. for damage
~ claim instructions.
PLEASE NOTE: The antenna’s used for this transmitter must be fixed-
mounted on outdoor permanent structures with a separation distance of at
least 6 meters from all persons during normal operation. Users and
installers must be provided with appropriate antenna installation instructions
and transmitter operating conditions, including antenna co-location
requirements of §1.1307(b)(3), for satisfying RF exposure compliance.
__—__—__.__—_.._.——_-—
flQD‘iMTN am 7 camp-a "mum!
K ELECTRONIC
SYSTEMS LTD '
1 INTRODUCTION ........................................................................................................ 4
2 GENERAL DESC
2.1 FUNCTIONS
2,2 APPEARANCE AND CONNECTOR
3 THEORY OF OPERATION ........
3.1 RECEIVER .........................
3.1.1
3.1.2
3.1.3
3.2 TRANSMITTER ......
3.2.1
3.2.2
3.2.3
3.3 SYN’IHESIZER ..........
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
3.4 POWERSUPPLIES.....
3.5 MlCRO-CON‘IROLLER.
4 SOFTWARE DESCRIPTION
4.1 FUNCTION .........................
4.2 PROGRAMMABLE PARAMETERS
4.3 TROUBLESHOOTING AND SYMPTOM
4.3.1
5 PROGRAMMING GUIDE
5.1 SELF-TEST LEDs .......
5.2 Gupl OTM UTLLI‘IY PROGRAM
5.2.1
5.2.1.1
5.2.1.2 Loading Parameter Values.
5.2.1.3 Changing Parameter Values
5.2.1.4 Updating Parameter Vaiue Changes.
5.2.1.5 Continuing Parameter Value Changes
5.2.1.6 Continuous Transmission for a Predefined Ime (Tx time out) .
5.3 TROUBLESHOOTING...
6 MANUFACTURER TES l 11“; DETUP DIAGRAM
6.1 MEASURING AND AUXILIARY EQUIPMENT ...........
TIO
VHF Front-end Circults
DnzlbIE-Balanc'ed Miter. ..
45 MHz IF Section and Back-end IF 1C
A ntennu Switch
Harmonic F ilrer.
Power A mplifier
MB] 5 01 Chi/7 (Fujitsu Microelectronicx Inc
TX 0225 B.
V (JO/Rx
V CO/Tx
Tx/Buffer Ampnjier...
Rx/Buffer A mpIi/ier, ..
F ecdhack Buffer A mplifie
.7
11.
km) Bookmark not dque
Trouble LEDS .........................
Operating Instructions.
Connecting BSRI 00 to Gupl
7 TES G, ADfiJSTING, AND TUNE-“£6 ................................................................ 18
8 TECHNICAL SPECIFICATIONS ........................................................................... 21
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Dm a cumin. "gr-"5,
K ELECTRONIC
SYSTEMS LTD '
‘a introduction
This document is intended for experienced technical personnel, and it explains the
theory of operation, software and programming guide description, testing,
adjusting, and tuning procedures for the BSRIOOTM transceiver in manufacturing
and laboratory conditions It contains the following chapters:
- Introduction
0 General Description
- Theory of Operation
0 Software Description
0 Programming Guide
6 Manutacture Testing Setup Diagram
Testing, Adjusting, and Tuning
Technical Specifications
2 General Description
The BSRl 00 transceiver receives and transmits FSK (fi'cqucncy shill keying) and
DF (direct frequency) moduiated signals in VHF bands. It operates as a two-way
base-station radio at remote central stations and repeaters in halfduplex mode of
communication. The following is a description 01":
0 Functions
0 Appearance and Connectors
2.1 Functions
0 Receives and transmits:
- FSK (frequency shifl keying) modulated signals .
- DF (direct fi'equency) modulation
- Performs receiving and transmitting frequency programming changes
0 RSSI output
- Measurement analog output
~ Visual controi:
- Channel monitor control
— PT! cc-ntrci
- ON/OFF indicator
2,2 Appearance and Connectors
BSRlOO has five sets ofconnectors: J1, J2, J3, J4, JS (see Figure l: BSRlOO
connectors).
- Jl: BNC connector connects an Rx VHF antenna (usually it is connect to
Ground; optionally it can be connected to Rx)
- J2: BNC connector connects an Rx\Tx VHF antenna. (Optional BNC
connector connects a Tx antenna oniy.)
- J3: 12.5 VDC power supply.
ncpqmm Dana ‘ ann'rn "anus,
ELECTRONIC
SYSTEMS LTD '
0 J4: A 10-pin contact connector connects the foiiowing:
Connector
Pin
+VB
GND
pm
9°
R8232 IN
RS232 OUT
PTT
AUDIO IN
DIAGNOSTIC MODE
AUDIO OUT*
Oxloxv-bu
‘Optional
5: A D-typc IS—pin rear panel connedor connects illc following:
Connector Pin _
211, fi,,, _v uh , A ,
_P1120_t_11__,,,, "2A ,, _ _ ,
115232 IN 3
115232 OUT 4 A
GND 5,6,10.13,15
AUDIO OUT T 7
AUDIO 1N s
CHANNEL MONITOR 9
RSSI OUT 11 7
RSSI TO Al 12
DATAOUT 4
KP m Bsmno T
7 ,, ‘
emu
J5
0.
J2 J1
Figure 1: BSRIM cnnnectols
mm
JS
nepqmm
Dana A:
can/hm Manual
ELECTRONIC
SYSTEMS LTD
3 These-j of Geeratien
The BSRl 00 transceiver consists of five major blocks:
0 Receiver
0 Transmitter
o Synthesizer
0 Microcomputer
0 Power supplies
The following is a description of operation for the live major blocks and their
modules.
3.1 Receiver
The Rec-c 'er consists of four rreijor blocks:
- VHF Front-end Circuits
- Double-Balanced Mixer
- 45 MHZ IF Section and Back-end IF IC with RSSl meter and channel
monitor functions.
3.1.1 VHF Frontend Circuits
The VHF Front—end circuits consists of tree blocks of circuitry: Pre~selector, RF
amplifier, and Post-selector filter. The Pre-sclcetor and Post-selector filters are
fixed tuned designs and provide wide-band operation.
The prc-sclector is a 3-pole, .Ol dB Chebyshev band pass filter with capacitive
coupled resonators .The 3 dB bandwidth is 19 M11; centered at 164.5 MHZ and
the insertion loss is -l .5 dB. The prc-sclcctor filter’s output termination is
connected to the RF an .i.ier that follows it.
The RF amplifier is a class A common-emitter amplifier with an active bias
network. It has approximately +16 dB gain with 3 (B NF and is supplied by a
+8V supply (+8 Vr).
The post-selector is a 4»pole, .01 dB Chebyshev band pass filter with capacitive
coupled resonators The 3 dB bandwidth is 19 MHZ, centered at 164.5 MHz and
the insertion loss is -2.5 dB. The post—selector filter operates with a 50 Ohm
output termination. The input termination is connected to the RF amplifier. The
output transmission is connected to the mixer that foiiows.
3.1.2 Double-Balanced Mixer
The Double-Balanced Mixer is fiviS-i. DBM configuration consists of four diodes
and two balanced mixers connected in a “ring” configuration. The Double-
Balanced mixer uses two hybrids, which improve both the L-R and R—l ports.
Because of its highly balanced and symmetrical configuration, this type of mixer
theoretically suppresses 75% ot‘possible IM products. The level mixer is +7 dBm
and its conversion loss is -7 dB max
DQD‘VMW Dana R can/Era Manual
ELECTRONIC
SYSTEMS LTD ’
3.1.3 -5 MHZ IF Section and Back-end {F K:
The Intermediate Frequency (IF) Section consists of: 45 MHz IF and back-end IF
I‘C blocks. The first LO signal and RF signai mix with the IF frequency of 45
MHz and then enter the IF portion of the radio.
The signal passes through a diplexer network (DN) to optimize intercept point
performance by not allowing any signals, especially local oscillator (LO)
harmonics, to be reflected back into the mixer. It is then passed through a number
of filters. The first crystal filter, TE 9420, provides selectivity; the second,
TE9420, image and intertnodulation protection.
The TE 9420 filter is a 2-pole filter with a 1 dB ripple, -3 dB insertion loss, »3dB
bandwidth offiJS kHz, -18 dB bandwidth ofth kHz, and ultimate rejection of
-40 dB. The IF 45 MHz signal is amplified by the IF amplifier, MAR—6SM. The
amplifier provides a +1 SdB gain with a 3 dB noise figure, draws 16mA of current,
and is supplied by the +8 Vrt
The signal then passes through the second crystal filter, “39420, which provides
further selectivity and second image rejection.
The filtered and amplified IF signal is then mixed with the second local oscillator
at 44.545 MHZ. The second L0 is internal to the narrowband FM IF chip, an
external crystal, and some external chip parts. The MC3372D chip consists of an
oscillator, mixer, and limiting IF Amplifier, Quadrature Discriminator and
Squeleh Switch
The output mixing of the IF signal and the section LO produce a signal at 455
kHz. This signal is then filtered by external ceramic filters, CFWS45SG and
CFU455G2, and amplified. The CFWS4SSGY filter is a ceramic filter for
communication equipment on 4550 kHz il ld-Iz center frequency, with a 1 dB
ripple, -ll dB insertion loss, -6dB bandwidth of $4.5 kHz, and stop hand all. of
-40 LIB.
The CFU455G2 filter is a ceramic filter for communication equipment on 455.0
kI-lz il kllz center frequency, with a ldB ripple, -6 dB insertion loss, »(7 dB
bandwidth of i4.5 kHz and stop band att. of -25 dB.
The CDBC455CX16 Ceramic Diseriminator is used in the circuit of the
demodulator. The resulting detected audio output is then sent to the external
3.2 Transmitter
The VHF transmitter contains:
Antenna switch
Harmonic filter
Power amplifier
Swthesizer
one.
ELECTRONIC
SYSTEMS LTD -
3.21; Amer-aria Switch
The Antenna Switch circuit consists of two PIN diodes and lumped elements to
simulate the M4 section. When D1 and D2 are both ON, transmit mode is active.
When Dland D2 are both OFF, receive mode is active. To activate receive
isolation while transmitting, use D2 as a short»circuit termination for the M4
section.
PIN diode UM940lF provides high isolation, low loss, and low distortion, and
can handle over 100W of transmitter power in VHF and UHF bands
3.2.2 Harmonie Filter
The purpose of the low-pass filter is to attenuate the harmonics of the transmitted
signal, but low-pass filter is reflective. This means that the undesired harmonics
are reflected back into the device and remix. This effectively increases the level of
harmonic output from the active device, and therefore, the low-pass filter should
provide about 20 dB more rejection then appears to be required. The low-pass
filter is oh Chebyshev design.
3.2.3 Power Amplifier
The power amplifier consists of an output power amplifier, drive, and predrive,
The Output power amplifier contains one transistor stages: n-p~n silicon RF VHF
power transistor ZSCZSS‘),
The 2SC2539 transistor, purchased fi'om Mitsubishi, has Pout = 14 Watt,
Pin20.5Watt, Vec = 13.5V, power gain 28 dB/F : 150 MHZ, and is designed for
RF power amplifiers on VHF hand mobile radio applications.
The drive is class C amplifier and it use the MRF4427 transistor, purchased from
Motorola, has Pout =1 .0 Watt,Pin=30mW and is designed for VHF large-signal
class C mnplifier app] '
The predrive is a MMBR 5179(7H) high frequency transistor with high gain
15 dB/ZOO MHZ and low noise NF=4.5/200MHZ .
3.3 Synthesizer
The serial input PLL frequency synthesizer consists of the following blocks:
MBl 501 chip (Fujitsu Microelectronics lnc.)
TXO 2253
VCO/ Rx
VCQ/TX
Tx/bufler amplifier: MAR7SM
Ric/buffer ampiifier: ivrARSSivi
Feedback buffer amplifier: MAR7SM
coco...

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Modify Date                     : 2001:10:30 15:48:42-05:00
Create Date                     : 2001:07:16 12:53:10-07:00
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