Ericsson 9D902780G3 User manual

ASSEMBLY DIAGRAM
MAINTENANCE MANUAL
FOR
UHF TRANSMITTER SYNTHESIZER MODULE
19D902780G3, G6 - G9
LBI-38671D
UHF TRANSMITTER
SYNTHESIZER MODULE
19D902780G3, G6 - G9
(19D902780, Sh. 1, Rev. 3)
TABLE OF CONTENTS
Page
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CIRCUIT ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
VOLTAGE CONTROLLED OSCILLATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FREQUENCY DOUBLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
RF AMPLIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
REFERENCE BUFFER AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PRESCALER AND SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LOOP BUFFER AMPLIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
AUDIO FREQUENCY AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
VOLTAGE REGULATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LOGIC CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TEST PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ALIGNMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRODUCTION CHANGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
IC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OUTLINE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ASSEMBLY DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
Ericsson Inc.
Private Radio Systems
Mountain View Road
Lynchburg, Virginia 24502
1-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A.
ericssonz

DESCRIPTION
The principle function of the Transmitter Synthesizer Mod-
ule is to provide the RF excitation for input to the MASTR III
station power amplifier. The output of the synthesizer is a
frequency modulated signal at the desired frequency. The mod-
ule contains the following functional blocks:
•A voltage controlled oscillator.
•Frequency Doubler (Multiplier).
•A chain of integrated circuit RF Amplifiers.
•A reference buffer amplifier.
•Dual modulus prescaler and synthesizer integrated
circuits.
•Loop amplifiers and passive loop filter.
•An audio amplifierand apre-modulation integrator.
•IC voltage regulators for +5 and -5 Vdc. A discrete
component regulator for +8 Vdc, and an Opera-
tional Amplifier regulator for +4 Vdc.
•Logic circuitry: address decoder, input signal gates,
and a lock indicator circuit.
CIRCUIT ANALYSIS
VOLTAGE CONTROLLED OSCILLATOR
Transistor Q1 and associated circuitry comprise a low
noise Voltage Controlled Oscillator (VCO). Inductor L1 and
associated capacitors form the oscillator resonant circuit
(tank).The noisecharacteristicof thisoscillatoris dependent
on the Q of this resonant circuit. The components used in the
tank are specified to have especially high Q. Diode D1 aids
in setting the bias point for low noise operation. (Any field
replacement of oscillator parts should use identical parts).
Variable Capacitor C10 sets the fixed capacitance in the
tank, and therefore sets the frequency range over which the
oscillator can be voltage tuned.
The oscillator frequency is voltage tuned by the signal
applied through R5 and L5 to the two varicap diodes D2 and
D3. Additionally, audio modulation is applied as an AF
voltage to the two varicap diodes. This RF voltage varies the
oscillator frequency at an audio rate (i.e., it frequency modu-
lates the oscillator). Low frequency audio is applied along
with the varicap control voltage through R5 and L5 while
high frequency audio (MOD) is applied via C16.
Resistors R6 through R9 provide a two volt negative bias
on the varicap diodes.
Transistors Q101andQ102andassociatedcircuitryform
the oscillator enable switch. This switch allows the station
control circuitry to turn the VCO ON or OFF via the
ANT_REL line. Setting the ANT_REL line to a logic low
causes Q102 to conduct. The five (5) volt output at Q102
collector (OSCON) enables the fault indicator gates,U705-3
and U705-4, and turns on Q101. Q101 starts to conduct,
providing a ground path for Q1. This turns ON the VCO.
FREQUENCY DOUBLER
Transistors Q801 and Q802 form a buffer stage to drive
transistor multiplier Q803. The buffer isolates VCO Q1 from
loading effects which could degrade oscillator loaded Q and
hence noise performance. Transistor multiplier Q803 is
tuned to pass the second harmonic of the VCO output and
serves as a frequency doubler. Tank elements L802, C812-
C814 and L803 form a resonant circuit and matching net-
work to drive resistive splitter R201-R204.
RF AMPLIFIERS
The RF chain begins with resistive splitter R201-R204
and R216-R218. The output of the splitter at R203 is attenu-
atedby10dBandprovidesimpedancematchinghelicalfilter
FL201, which is tuned to pass the fundamental while reject-
ing harmonics by approximately40 dB.Theoutput ofFL201
is fed thru resistive pad R205-R207 to MMIC Amplifier
U201 which operates in compression. U201 drives output
amplifier U202 into compression. The output amplifier is
followed by a bandpass filter (C208-C210, L203-L205) and
resistive attenuators (R210-R215). The final output at the
front panel BNC Connector (J2) isnominally 11.5dBm, and
drives the station Power Amp.
The other output of the resistive splitter at R218 is
attenuated by 20 dB and drives buffer amp U203 into com-
pression. U203 drives the synthesizer prescaler providing a
feedback signal for the synthesizer phase locked loop.
REFERENCE BUFFER AMPLIFIER
Transistor Q401 and associated components comprise a
buffer amplifier for the reference oscillator signal. (The
reference oscillator signal is produced by the receiver syn-
thesizer module of a MASTR III station.) The 0 dBm refer-
ence oscillator signal is fed through the front panel BNC
connector J1. Resistor R405 provides a 50 ohm load to the
reference oscillator. The output of the Reference Buffer
Amplifier is fed directly to the synthesizer integrated circuit.
The output level at TP9 is approximately 3 volts peak to
peak.
Copyright © June 1992, Ericsson GE Mobile Communications, Inc.
TABLE 1 - GENERAL SPECIFICATIONS
ITEM SPECIFICATION
FREQUENCY RANGE 450-470 MHz (G3)
425-450 MHz (G7)
403-430 MHz (G6)
380-400 MHz (G8)
470-494 MHz (G9)
CHANNEL SPACING 6.25 kHz
RF POWER OUT (50 Ohm load) 10 to 13 dBm
(10 to 20 mW)
RF HARMONICS < -30 dBc
NON-HARMONIC SPURS
1 to 200 MHz < - 90 dBc
200 MHz to 1 GHz < - 60 dBc
CARRIER ATTACK TIME <25 mSec
REFERENCE INPUT
input level 0 dBm ±1.5dB
input impedance 50 Ohm
frequency 5 to 17.925 MHz (must be integer divisible by
channel spacing)
MODULATION SENSITIVITY 5 kHz peak dev/1 Vrms, Adjustable
AF INPUT IMPEDANCE 600 Ohm
AF RESPONSE
10 Hz ±1.5 dB
1000 Hz0 dB reference
3 kHz ±1.5 dB
10 Hz SQUARE WAVE MODULATION <10%
Sq wave droop
HUM & NOISE -55 dB
POWER REQUIREMENTS 13.8 Vdc @ 275 mA
-12.0 Vdc @ 10 mA
LBI-38671
1

PRESCALER AND SYNTHESIZER
Integrated circuit U402 is the heart of the synthesizer. It
contains the necessary frequency dividers and control cir-
cuitry to synthesize output frequencies by the technique of
dual modulus prescaling. U402 also contains an analog
sample and hold phase detector and a lock detector circuit.
Within the synthesizer (U402) are three programmable
dividers which are loaded serially using the CLOCK, DATA,
and ENABLE inputs (pins 11, 12, and 13 respectively). A
serial data stream (DATA) on pin 12 is shifted into internal
shift registers by low to high transitions on the clock input
(CLOCK) at pin 11. A logic high (ENABLE) on pin 13 then
transfers the program information from the shift registers to
the divider latches.
The reference signalis applied to U402 pin 2 and divided
by the "R" divider. This divides the reference signal down to
a divided reference frequency (Fr). The typical reference
frequency is 12.8 MHz and the typical divided reference
frequency is 6.25 kHz providing for synthesizer steps of 6.25
kHz for use with both 12.5 kHz and 25 kHz channel spacing.
Other channel spacings are possible by providing proper
programming.
The "A" and "N" dividers process the loop feedback
signal provided by the VCO (by way of the dual modulus
prescaler U401). The output of the "N" divider is a divided
version of the VCO output frequency (Fv).
Synthesizer U402 also contains logic circuitry to control
the dual modulus prescaler U401. If the locked synthesizer
output frequency is 450 MHz. The prescaler output nomi-
nally will be equal to 3.515625 MHz (450 MHz/128). This
frequency is further divided down to Fvby the "N" divider
in U402. Fv is then compared with Frin the phase detector
section.
The phase detector output voltage is proportional to the
phase difference between Fvand Fr. This phase detector
output serves as the loop error signal. This error signal
voltage tunes the VCO to whatever frequency is required to
keep Fvand Frlocked (in phase).
LOOP BUFFER AMPLIFIERS AND LOOP
FILTER
The error signal provided by the phase detector output is
buffered by operational amplifiers (op-amp) U501A and
U501B. The audio modulation signal from U601B is also
applied to the input of U501B. The output of U501B is the
sum of the audio modulation and the buffered error signal.
The output of the second buffer (U501B) is applied to a
loop filter consisting of R506, R507, R508, C505 and C506.
This filter controls the bandwidth and stability of the synthe-
sizer loop. The UHF transmitter synthesizer has a loop
bandwidth of only several Hertz. This is very narrow, result-
ing in an excessively long loop acquisition time. To speed
acquisition, switches U502A and U502C bypass the filter
circuit whenever an ENABLE pulse is received by the Input
Gates.
AUDIO FREQUENCY AMPLIFIER
The transmitter synthesizer audio input line is fed to
U601A. U601A is configured as a unity gain op-amp. Re-
sistor R601 sets the 600 ohm input impedance of this ampli-
fier. (NOTE: Data for digital modulation is fed to the
synthesizer through the audio input line).
The amplifier output is split into two components and fed
to two variable resistors VR601 and VR602. VR601 sets the
level in the low frequency audio path and VR602 sets the
level in the high frequency audio path. (There is no clear
break between the low and high frequency ranges. All voice
frequencies are within the high frequency range. The low
frequency range contains low frequency data components).
The wiper of VR601 (low frequency path) connects to
the input of U601B, the pre-modulation integrator. U601B
performs the function of a low-pass filter and integrator. The
integrator output is summed with the PLL control voltage at
the input of loop buffer amplifier U501B. This integrated
audio signal phase modulates the VCO. The combination of
pre-integration and phase modulation is equivalent to fre-
quency modulation.
The wiper of VR602 (high frequency path) is connected
to the modulation input of the VCO through C16.
VOLTAGE REGULATORS
U301 and U303 are monolithic voltage regulators (+5
Vdc and -5 Vdc respectively). These two voltages are used
by synthesizer circuitry. The +5 V regulator output is also
used as a voltage reference for the +8 Vdc discrete regulator
circuit.
U302A, Q302 and associated circuitry comprise the +8
volt regulator. Most module circuitry is powered from the +8
volt line. The regulator is optimized for especially low noise
performance. This is critical because the low noise VCO is
powered by the +8 volt line.
The +8 Vdc line also feeds the +4 Vdc regulator, U302B
and associated resistors. The +4 Vdc regulator provides a
bias voltage for several op-amps in the module.
Figure 1 - Block Diagram
LBI-38671
2

LOGIC CIRCUITS
Logic circuitry (other than that inside the synthesizer IC -
U402) consists of the following:
•An address decoder
•Input gates and level shifters
•Lock Indicator circuitry
The address decoder, U702, enables the Input Gates when
the A0, A1, and A2 input lines receive the proper logic code
(110 for the transmitter synthesizer). After receiving the proper
code, Y3 (U702-12) sends a logic low signal to U701C. U701C
acts as an inverter and uses the logic high output to turn on
Input Gates U701A, U701B, and U701D. The Input Gates
allow the clock, data and enable information to pass on to the
synthesizer via the level shifters. The Level Shifter Transistors
Q701, Q702 and Q703 convert the 5 volt gate logic level to the
8 volt logic level required by the synthesizer U402.
The Fault Indicator circuitry indicates when the synthesizer
is in an out-of-lock condition. The fault detector latches,
U705A and U705B are reset by the enable pulse during initial
loading of data into the synthesizer. If at any time afterwards
the lock detector signal (LD) goes low, the high output of
U705B will cause the output of gates U705C and U705D to go
low. The low output from U705C causes Q704 to conduct
turning on the front panel LED (CR701). The output of U705D
(FLAG) is connected to J3-13C for external monitoring of the
Synthesizer Module. A logic low on the FLAG line indicates
an out-of-lock condition.
MAINTENANCE
RECOMMENDED TEST EQUIPMENT
The following test equipment is required to test the synthe-
sizer Module:
1. RF signal source for 12.8 MHz, 0 dBm reference (in-
cluded with item 10)
2. AF Generator or Function Generator
3. Modulation Analyzer; HP 8901A, or equivalent, or a
UHF receiver
4. Oscilloscope; 20 MHz
5. DC Meter; 10 meg ohm (for troubleshooting)
6. Power Supply; 13.8 Vdc @ 350 mA
12.0 Vdc @ 25 mA
7. Spectrum Analyzer; 0-1 GHz
8. Frequency Counter; 10 MHz - 500 MHz
9. Personal Computer (IBM PC compatible) to load fre-
quency data
10. Service Parts Kit, (TQ-0650), (includes software for
loading frequency data)
TEST PROCEDURE
(Steps 5, 6, and 7 can be done using a modulation
analyzer or UHF receiver with 750 µs de-emphasis switch-
able in or out.
1. Lock synthesizer at 470.0 (G3), 430 (G6), 450 (G7),
400 (G8), or 494 (G9) MHz using software provided
in the service parts kit.
Verify lock (flag = high).
Verify front panel LED is off.
2. Measure output frequency.
Verify frequency = 470.0000 (G3), 425.000
(G6) or 450.000 (G7) MHz, 400.000 (G8), or
494.000 (G9) ±200 Hz.
3. Measure harmonic content.
Verify 2nd harmonic is < -30 dBc.
4. Measure RF power output into 50 ohm load.
Verify 10 to 13 dBm (10 to 20 mW).
5. MeasureAF distortionwith standardmodulating sig-
nal input.
Verify <5%.
6. Measure Humand Noiserelative to 0.44 kHz average
deviation, (de-emphasis on).
Verify < -55dB
7. Measure AF response at 300 Hz, 1 kHz (ref) and 3
kHz, (de-emphasis off).
Verify within ±1.5 dB with respect to 1 kHz
reference.
8. Verify lock at different frequencies.
a. Lock synthesizer at 380 (G8), 450 (G3), 403
(G6), 425 (G7), or 470 (G9) MHz. Verify LED
is off.
b. Lock synthesizer at 385 (G8), 455 (G3), 408.5
(G6), 430 (G7), or 476 (G9) MHz. Verify LED
is off.
c. Lock synthesizer at 390 (G8), 460 (G3), 414
(G6), 437.5 (G7), or 482 (G9) MHz. Verify
LED is off.
d. Lock synthesizer at 395 (G8), 465 (G3), 419.5
(G6), 445 (G7), or 488 (G9) MHz. Verify LED
is off.
ALIGNMENT PROCEDURE
1. Apply +13.8 Vdc and -12 Vdc. Verify the current
drain on the 13.8 volt supply is, <300mA and the
current drain on the -12 volt supply is <20 mA.
2. Lockthesynthesizerat380(G8),450(G3),403(G6),
425 (G7), or 470 (G9) MHz. Adjust trimmer C1O
until Vtest (23A) reads 2.5 (G3, G8), or2.0 (G6, G7,
G9) V ±0.05V.
3. Locksynthesizerat460.0(G3),390.0(G8),414 (G6)
or 437.5 (G7), or 482 (G9) MHz for the following
three adjustments.
•Set VR602 for 4.5 kHz peak deviation with a stand-
ard modulating signal applied to the audio input.
•Set VR601 for 4.4 kHz peak deviation with 0.6
Vrms, 10 Hz sine wave audio applied to module AF
input.
•Apply a 10 Hz 0.85 Vpk square wave (same peak
value as 0.6 rms (sine wave) to module AF input.
Adjust VR601 slightly for the flattest demodulated
square wave using a modulation analyzer or re-
ceiver (no de-emphasis) and an oscilloscope. The
maximum net variation in voltage over 1/2 cycle is
10%.
TROUBLESHOOTING
A troubleshooting guide is provided showing typical
measurements at the various test points.
SERVICE NOTES
The following service information applies when
aligning, testing, or troubleshooting the TX Synthe-
sizer:
•Standard Modulating Signal = 1 kHz sinusoidal
voltage, 0.6 Vrms at the module input terminals
(600 ohm Rin).
•Logic Levels:
Logic 1 = high = 4.5 to 5.5 Vdc
Logic 0 = Low = 0 to 0.5 Vdc
•Transmitter Synthesizer Address = A0 A1 A2 =
110
•Synthesizer data input stream is as follows:
14-bit "R" divider most significant bit
(MSB) = R13 through "R" divider least sig-
nificant bit (LSB) = R0
10-bit "N" divider MSB = N9 through "N"
divider LSB = N0
7-bit "A" divider MSB = A6 through "A"
divider LSB = A0
Single high Control bit (last bit)
Latched When Control Bit = 1
DATA ENTRY FORMAT
Latched When
Control Bit = 1
Data in ➞Last A0 A6 N0 N9 R0 R13 ➞
Bit LSB – – – – – MSB LSB – – – – MSB LSB
For the transmitter synthesizer, 5 kHz chan-
nel spacing
R = 2560
N = integer part of (frequency in kHz)/(320)
A = (frequency in kHz)/(5) - 64*N
All numbers must be converted to binary.
•ANT_REL line must be logic low (0V) in order to
lock synthesizer.
•Synthesizer lock is indicated by the extinguishing
of the front panel LED indicator and a logic high
on the fault flag line (J3 pin 13C).
•Always verify synthesizer lock after each new data
loading.
Control B
LBI-38671
3

PARTS LIST
SYMPTOM CHECK
(CORRECT READINGS SHOWN) INCORRECT READING INDICATES DEFECTIVE COMPONENT
SYNTHESIZER FAILS TO LOCK Check DC voltages
+5 V @ U301 Pin 1
+8 V @ Q301 collector
-5 V @ U303 Pin 1
U301 or associated components
U302, Q301, Q302 or associated
components
U303 or associated components
Check 12.8 MHz reference signal
3V P-P, 12.8 MHz @ U402 Pin 2 No reference signal to front panel BNC or Q401
Check oscillator signal
11.5 ±1.5 dBm 435 to 485 MHz at
front panel BNC Proceed to "Low/No RF output" below
Check prescaler output
IV P-P, 3.5 MHz @ U401 Pin 4 U202, U401
Check CLOCK, DATA, ENABLE
While loading frequency data into
synthesizer Check 8V logic signals
@ Pins 11, 12, 13 of U402
Wrong address or
U701, U702, Q701, Q702, Q703
Check Phase detector output
6.25 kHz random signal @ U501
Pin 7 U402, U501
Low/No RF Output Check oscillator
LESS than 0.5 Vdc @ collector of
Q101 Synthesizer not keyed (low on ANT relay line) or Q101, Q102
Check RF chain
No Modulation Check AF amplifier
Apply IV, 1 kHz signal to
TX/Audio/Hi U601
Check IV signal @ U601 Pin 1
TROUBLESHOOTING GUIDE UHF TRANSMITTER SYNTHESIZER MODULE
19D902780G3, G6 - G9
ISSUE 5
*COMPONENTS, ADDED, DELETED OR CHANGED BY PRODUCTION CHANGES
SYMBOL PART NO. DESCRIPTION
TRANSMITTER SYNTHESIZER BOARD
19D902779G3, G6 - G9
- - - - - - - - - MISCELLANEOUS - - - - - - - - -
2 19D902508P4 Chassis.
3 19D902509P2 Cover.
4 19D902555P1 Handle.
6 19A702381P506 Screw, thread forming: TORX, No.M3.5-.6 x 6.
7 19A702381P513 Screw, thread forming: TORX, No.M3.5 - 0.6 X 13
11 19A702381P508 Screw, thd.form: No.3.5-0.6 x 8.
12 19D902824P1 Casting.
- - - - - - - - - - CAPACITORS - - - - - - - - -
C1 19A702236P25 Ceramic: 10 pF + or -.5 pF, 50 VDCW, temp coef
-30 PPM/°C.
C2 19A702236P32 Ceramic: 18 pF + or -5%, 50 VDCW, temp coef 0 +
or -30 PPM
C3 19A702236P28 Ceramic: 12 pF + or - 5%, 50 VDCW, temp coef 0
+ or -30 PPM.
C4 19A702236P1 Ceramic: 0.5 pF + or - pF, temp coef 0
+ or - PPM/°C.(Used in G8).
C4 19A702236P8 Ceramic: 1.5 pF + or -.25 pF, 50 VDCW.
(Used in G3, G6, G7)
C5 19A702236P13 Ceramic: 3.3 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM. (Used in G3).
C5 19A702236P17 Ceramic: 4.7 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM. (Used in G6 & G8).
C5 19A702236P15 Ceramic: 3.9 pF + or -.25 pF, 50 VDCW, temp
or -30 PPM/°C. (Used in G7 & G9).
C6 19A702236P28 Ceramic: 12 pF + or - 5%, 50 VDCW, temp coef 0
+ or -30 PPM.(Used in G8 & G3).
C6 19A702236P30 Ceramic: 15 pF + or -5%, 50 VDCW, temp coef 0 +
or -30 PPM/°C. (Used in G6 & G7).
C6 19A702236P32 Ceramic: 18 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.(Used in G9).
C7 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C8 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C9 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C10 19A134227P5 Variable: 1.5 to 14 pF, 100 VDCW.
C11 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C12 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C13 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
and + or -30 PPM/°C.
C14
C15 19A700004P2 Metallized polyester: 0.1 uF + or - 10%, 63
VDCW.
C16 19A702061P73 Ceramic: 330 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C17 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C18 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
and
C19
C101 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C102 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C103 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C201 19A702061P61 Ceramic: 100 pF + or - 5%, 50 VDCW, temp coef 0
+ or - 30 PPM. .
SYMBOL PART NO. DESCRIPTION
C202 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C203 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C204 19A702061P61 Ceramic: 100 pF + or - 5%, 50 VDCW, temp coef 0
and + or - 30 PPM.
C205
C206 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C207 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C208 19A702236P28 Ceramic: 12 pF + or - 5%, 50 VDCW, temp coef 0
+ or -30 PPM.
C209 19A702236P10 Ceramic: 2.2 pF + or -2.5 pF, 50 VDCW, temp
+ or -30 PPM/°C. (Used in G3, G6, G7, G8).
C209 19A702236P8 Ceramic: 1.5 pF + or -0.25 pF, 50 VDCW, temp
+ or -30 PPM/°C. (Used in G9).
C210 19A702236P28 Ceramic: 12 pF + or - 5%, 50 VDCW, temp coef 0
+ or -30 PPM.
C211 19A702061P61 Ceramic: 100 pF + or - 5%, 50 VDCW, temp coef 0
and + or - 30 PPM.
C212
C213 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C214 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C215 19A702061P61 Ceramic: 100 pF + or - 5%, 50 VDCW, temp coef 0
+ or - 30 PPM.
C301 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C302 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C303 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
and
C304
C305 19A705205P7 Tantalum: 10 uF, 25 VDCW; sim to Sprague 293D.
C306 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C307 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C308 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
and + or -30 PPM/°C.
C309
C310 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C311 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C312 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C313 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C401 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C402 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C403 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
thru
C405
C406 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C407 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C408 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C409 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C410 19A702052P26 Ceramic: 0.1uF + or - 10%, 50 VDCW
C411 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C412 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C413 19A702052P108 Ceramic: 0.01 uF + or -10%, 50 VDCW.
C414 19A702061P69 Ceramic: 220 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C501 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C502 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C503 19A702052P33 Ceramic: 0.1 uF + or -10%, 50 VDCW.
C504 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
LBI-38671
4

PARTS LIST
SYMBOL PART NO. DESCRIPTION
C505 19A703684P3 Metalized polyester: 2.2 uF + or - 10$, 50 VDCW.
C506 19A703902P3 Metal: 0.047 uF + or -10%, 50 VDCW.
C507 19A702052P33 Ceramic: 0.1 uF + or -10%, 50 VDCW.
C602 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C603 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C604 19A705205P2 Tantalum: 1 uF, 16 VDCW; sim to Sprague 293D.
C605 19A703684P3 Metalized polyester: 2.2 uF + or - 10$, 50 VDCW.
C701 19A702061P61 Ceramic: 100 pF + or - 5%, 50 VDCW, temp coef 0
thru + or - 30 PPM.
C712
C714 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
and + or -30 PPM/°C.
C715
C801 19A702061P4 Ceramic: 1.8 pF + or - 0.5 pF, 50 VDCW, temp
or - 250 PPM.
C802 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C803 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
and
C804
C805 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C806 19A702061P65 Ceramic: 150 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C807 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D.
C808 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C809 19A702061P13 Ceramic: 10 pF + or - 5%, 50 VDCW, temp coef 0
+ or - 30 PPM.
C810 19A702052P14 Ceramic: 0.01 uF + or - 10%, 50 VDCW.
C811 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0
+ or -30 PPM/°C.
C812 19A702061P13 Ceramic: 3.3 pF + or - 0.25 pF, temp
or - 30 PPM/°C.(Used in G8).
C812 19A702061P5 Ceramic: 2.2 pF + or - 0.5 pF, 50 VDCW, temp
or - 120 PPM. (Used in G6, G7, G3).
C813 19A702061P21 Ceramic: 15 pF + or - 5%, 50 VDCW, temp coef 0
and + or - 30 PPM. .(Used in G6, G7, G3).
C814
C813 19A702061P32 Ceramic: 18 pF + or - 5%, 50 VDCW, temp coef 0
and + or - 30 PPM/°C.(Used in G8).
C814
C813 19A702236P28 Ceramic: 12 pF + or - 5%, 50 VDCW, temp coef 0
and + or - 30 PPM. .(Used in G9).
C814
- - - - - - - - - - - DIODES - - - - - - - - - -
CR701 19A703595P10 Optoelectic: Red LED;sim to HP HLMP-1301-010.
D1 19A705377P1 Silicon, Hot Carrier: sim to MMB0201. (Used in
G40, G3, G6,
D2 19A149674P3 High tuning ratio diode: sim to Toko KV1430.
and
D3
- - - - - - - - - - - FILTERS - - - - - - - - - -
FL201 19A705458P8 Filter: 378-402 MHz; sim to
302MXPR-1785A (Used in G8).
FL201 19A705458P5 Helical, UHF: 424-450 MHz. (Used in G7).
FL201 19A705458P4 Helical, UHF: 403-425 MHz. (Used in G6).
FL201 19A705458P1 Helical, UHF: 450-470 MHz. (Used in G3)
- - - - - - - - - - - JACKS - - - - - - - - - - -
J1 19A115938P24 Connector, receptacle.
and
J2
J3 19B801587P7 Connector, DIN: 96 male contacts, right angle
to AMP 650887-1.
- - - - - - - - - - INDUCTORS - - - - - - - - - -
L1 19C851001P3 Coil, RF: 1 1/2 Turns, sim to Paul Smith
SK-901-1. (Used in G8).
L1 19C851001P2 Coil, RF: sim to Paul Smith SK-901-1.
(Used in G6).
SYMBOL PART NO. DESCRIPTION
L1 19C851001P1 Coil, RF: sim to Paul Smith SK901-1.
(Used in G3, G7).
L2 19A705470P28 Coil, Fixed: 1.8 uH; sim to Toko 380LB-1R8M.
(Used in G9).
L2 19A705470P24 Coil, Fixed:0.82 uH;sim to Toko 380NB-R82M.
thru (Used in G3, G6 - G8).
L5
L201 19A705470P15 Coil, fixed: 0.15uH; sim to Toko 380NB-R15M.
and
L202
L203 19A705470P1 Coil, Fixed: 10 nH; sim to Toko 380NB-10nM.
L204 19A705470P10 Coil, fixed: 56 nH; sim to Toko 380NB-56nM.
L205 19A705470P1 Coil, Fixed: 10 nH; sim to Toko 380NB-10nM.
L206 19A705470P15 Coil, fixed: .15uH; sim to Toko 380NB-R15M.
L801 19A705470P2 Coil, Fixed: 12 nH; sim to Toko 380NB-12nM.
thru
L803
- - - - - - - - - - TRANSISTORS - - - - - - - - -
Q1 19A702524P2 N-Type, field effect; sim to MMBFU310.
Q101 19A700076P2 Silicon, NPN: sim to MMBT3904, low profile.
Q102 19A700059P2 Silicon, PNP: sim to MMBT3906, low profile.
Q301 19A134577P2 Silicon, PNP: sim to Phillips BCX51-16.
Q302 19A700076P2 Silicon, NPN: sim to MMBT3904, low profile.
Q401 19A704708P2 Silicon, NPN: sim to NEC 2SC3356.
Q501 19A700076P2 Silicon, NPN: sim to MMBT3904, low profile.
Q701 19A700076P2 Silicon, NPN: sim to MMBT3904, low profile.
thru
Q704
Q801 19A704708P2 Silicon, NPN: sim to NEC 2SC3356.
thru
Q803
- - - - - - - - - - RESISTORS - - - - - - - - - -
R1 19B800607P470 Metal film: 47 ohms + or -5%, 1/8 w.
R2 19B800607P183 Metal film: 18K ohms + or -5%, 1/8 w.
R3 19B800607P680 Metal film: 68 ohms + or -5%, 1/8 w.
R4 19B800607P100 Metal film: 10 ohms + or -5%, 1/8 w.
and
R5
R6 19B800607P824 Metal film: 820K ohms + or -5%, 1/8 w.
R7 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
R8 19B800607P102 Metal film: 1K ohms + or -5%, 1/8 w.
R9 19B800607P681 Metal film: 680 ohms + or -5%, 1/8 w.
R101 19B800607P473 Metal film: 47K ohms + or -5%, 1/8 w.
R102 19B800607P103 Metal film: 10K ohms + or -5%, 1/8 w.
R103 19B800607P473 Metal film: 47K ohms + or -5%, 1/8 w.
R104 19B800607P472 Metal film: 4.7K ohms + or -5%, 1/8 w.
R105 19B800607P392 Metal film: 3.9K ohms + or -5%, 1/8 w.
R201 19B800607P180 Metal film: 18 ohms + or -5%, 1/8 w.
and
R202
R203 19B800607P150 Metal film: 15 ohms + or -5%, 1/8 w.
R204 19B800607P101 Metal film: 100 ohms + or -5%, 1/8 w.
R205 19B800607P331 Metal film: 330 ohms + or -5%, 1/8 w.
R206 19B800607P150 Metal film: 15 ohms + or -5%, 1/8 w.
R207 19B800607P331 Metal film: 330 ohms + or -5%, 1/8 w.
R208 19B800607P181 Metal film: 180 ohms + or -5%, 1/8 w.
R209 19B800607P750 Metal film: 75 ohms + or -5%, 1/8 w.
R210 19B800607P331 Metal film: 330 ohms + or -5%, 1/8 w.
R211 19B800607P150 Metal film: 15 ohms + or -5%, 1/8 w.
R212 19B800607P331 Metal film: 330 ohms + or -5%, 1/8 w.
and
R213
R214 19B800607P150 Metal film: 15 ohms + or -5%, 1/8 w.
SYMBOL PART NO. DESCRIPTION
R215 19B800607P331 Metal film: 330 ohms + or -5%, 1/8 w.
R216 19B800607P510 Metal film: 51 ohms + or -5%, 1/8 w.
R217 19B800607P220 Metal film: 22 ohms + or -5%, 1/8 w.
R218 19B800607P330 Metal film: 33 ohms + or -5%, 1/8 w.
R219 19B800607P181 Metal film: 180 ohms + or -5%, 1/8 w.
R220 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
R221 19B800607P330 Metal film: 33 ohms + or -5%, 1/8 w.
and
R222
R301 19B800607P100 Metal film: 10 ohms + or -5%, 1/8 w.
thru
R303
R304 19B800607P470 Metal film: 47 ohms + or -5%, 1/8 w.
R305 19B800607P103 Metal film: 10K ohms + or -5%, 1/8 w.
R306 19B800607P222 Metal film: 2.2K ohms + or -5%, 1/8 w.
R307 19A702931P230 Metal film: 2000 ohms + or -1%, 200 VDCW, 1/8 w.
R308 19A702931P249 Metal film: 3160 ohms + or -1%, 200 VDCW, 1/8 w.
R309 19B800607P471 Metal film: 470 ohms + or -5%, 1/8 w.
R310 19B800607P470 Metal film: 47 ohms + or -5%, 1/8 w.
R311 19B800607P103 Metal film: 10K ohms + or -5%, 1/8 w.
and
R312
R401 19B800607P330 Metal film: 33 ohms + or -5%, 1/8 w.
R402 19B800607P102 Metal film: 1K ohms + or -5%, 1/8 w.
R403 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
R404 19B800607P561 Metal film: 560 ohms + or -5%, 1/8 w.
R405 19B800607P510 Metal film: 51 ohms + or -5%, 1/8 w.
R406 19B800607P101 Metal film: 100 ohms + or -5%, 1/8 w.
R407 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
R408 19B800607P100 Metal film: 10 ohms + or -5%, 1/8 w.
R409 19B800607P222 Metal film: 2.2K ohms + or -5%, 1/8 w.
R410 19B800607P392 Metal film: 3.9K ohms + or -5%, 1/8 w.
R411 19B800607P562 Metal film: 5.6K ohms + or -5%, 1/8 w.
R412 19B800607P223 Metal film: 22K ohms + or -5%, 1/8 w.
(Used IN G3, G6, G7, G8).
R412 19B800607P823 Metal film: 82K ohms + or -5%, 1/8 w.
(Used in G9).
R415 19B800607P100 Metal film: 10 ohms + or -5%, 1/8 w.
R501 19B800607P470 Metal film: 47 ohms + or -5%, 1/8 w.
R502 19B800607P102 Metal film: 1K ohms + or -5%, 1/8 w.
R503 19B800607P223 Metal film: 22K ohms + or -5%, 1/8 w.
R504 19B800607P150 Metal film: 15 ohms + or -5%, 1/8 w.
R505 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
R506 19B800607P105 Metal film: 1M ohms + or -5%, 1/8 w.
R507 19B800607P183 Metal film: 18K ohms + or -5%, 1/8 w.
(Used IN G3, G6, G7, G8).
R507 19B800607P273 Metal film: 27K ohms + or -5%, 1/8 w.
(Used in G9).
R508 19B800607P333 Metal film: 33K ohms + or -5%, 1/8 w.
(Used IN G3, G6, G7, G8).
R508 19B800607P823 Metal film: 82K ohms + or -5%, 1/8 w.
(Used in G9).
R509 19B800607P473 Metal film: 47K ohms + or -5%, 1/8 w.
R510 19B800607P103 Metal film: 10K ohms + or -5%, 1/8 w.
R511 19B800607P101 Metal film: 100 ohms + or -5%, 1/8 w.
R601 19A702931P176 Metal film: 604 ohms + or -1%, 200 VDCW, 1/8 w.
R602 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
and
R603
R604 19B800607P470 Metal film: 47 ohms + or -5%, 1/8 w.
R605 19B800607P104 Metal film: 100K ohms + or -5%, 1/8 w.
SYMBOL PART NO. DESCRIPTION
R606 19B800607P680 Metal film: 68 ohms + or -5%, 1/8 w.
R607 19B800607P102 Metal film: 1K ohms + or -5%, 1/8 w.
R608 19B800607P392 Metal film: 3.9K ohms + or -5%, 1/8 w.
R609 19B800607P472 Metal film: 4.7K ohms + or -5%, 1/8 w.
R610 19B800607P105 Metal film: 1M ohms + or -5%, 1/8 w.
R701 19B800607P102 Metal film: 1K ohms + or -5%, 1/8 w.
thru
R706
R707 19B800607P472 Metal film: 4.7K ohms + or -5%, 1/8 w.
R708 19B800607P473 Metal film: 47K ohms + or -5%, 1/8 w.
and
R709
R710 19B800607P103 Metal film: 10K ohms + or -5%, 1/8 w.
thru
R712
R720 19B800607P392 Metal film: 3.9K ohms + or -5%, 1/8 w.
R721 19B800607P562 Metal film: 5.6K ohms + or -5%, 1/8 w.
R722 19B800607P473 Metal film: 47K ohms + or -5%, 1/8 w.
R723 19B800607P391 Metal film: 390 ohms + or -5%, 1/8 w.
R724 19B800607P101 Metal film: 100 ohms + or -5%, 1/8 w.
R801 19B800607P102 Metal film: 1K ohms + or -5%, 1/8 w.
thru
R803
R804 19B800607P101 Metal film: 100 ohms + or -5%, 1/8 w.
thru
R806
R807 19B800607P182 Metal film: 1.8K ohms + or -5%, 1/8 w.
R808 19B800607P103 Metal film: 10K ohms + or -5%, 1/8 w.
R809 19B800607P270 Metal film: 27 ohms + or -5%, 1/8 w.
R810 19B800607P101 Metal film: 100 ohms + or -5%, 1/8 w.
- - - - - - - - INTEGRATED CIRCUITS - - - - - - -
U201 19A705927P1 Silicon, bipolar: sim to Avantek MSA-0611.
U202 344A3907P1 Integrated circuit, MMIC: sim to Avantek
MSA-1105.
U203 19A705927P1 Silicon, bipolar: sim to Avantek MSA-0611.
U301 19A704971P9 Positive Voltage Regulator, 5 volt;sim to
MC78L05ACD.
U302 19A116297P7 Linear: Dual Op Amp; sim to MC4558CD.
U303 19A704971P7 Voltage Regulator, Negative: sim to Motorola
MC79L05ACD.
U401 19A149944P201 Dual Modulus Prescaler: sim to Motorola
MC12022A.
U402 19B800902P5 Synthesizer, custom: CMOS, serial input.
U501 344A3070P1 Dual Operational Amplifier: sim to Motorola
TL072.
U502 19A702705P4 Digital: Quad Analog Switch/Multiplexer;
U601 19A116297P7 Linear: Dual Op Amp; sim to MC4558CD.
U701 19A703483P302 Digital: Quad 2-Input NAND Gate; sim to 74HC00.
U702 19A703471P320 Digital: 3-Line To 8-Line Decoder; sim to
74HC138.
U705 19A703483P302 Digital: Quad 2-Input NAND Gate; sim to 74HC00.
- - - - - - - - VOLTAGE REGULATORS - - - - - - -
VR601 19B235029P7 5 Turn Cermet Trimmer: 5K ohms, + or - 10%, .5w,
and sim to 3296W-1502-R.
VR602
LBI-38671
5

PRODUCTION CHANGES & IC DATA
U301
19A704971P9
+5V Regulator
U302 & U601
19A116297P7
Dual Wide Band Op-Amp
U201 and U203
19A705927P11
Silicon Bipolar MMIC
U202
344A3907P1
Silicon Bipolar MMIC
U303
19A704971P7
-5V regulator
U501
344A3070P1
Operational Amplifier
PRODUCTION CHANGES
Changes in the equipment to improve or to simplify circuits are identified by a
"Revision Letter", which is stamped after the model number of the unit. The
revision stamped on the unit includes all previous revisions. Refer to the Parts
List for descriptions of parts affected by these revisions.
REV. A - TRANSMITTER SYNTHESIZER BOARD
19D902779G3,6,7
To correctloadingproblemon synthICwhichcouldcausefailuretolock
on channel.
R707 was 47k ohms (19B800607P473).
REV. B - TRANSMITTER SYNTHESIZER BOARD
19D902779G3, G6-G8
To make new band splits compatible with helical filters. New PWB.
C15 was 0.1 µF (19A700004P2).
C16 was 330 pF (19A702061P73).
LBI-38671
6

IC DATA
U401
19A149944P201
Dual Modulus Prescaler
U402
19B800902P5
Synthesizer
U502
19A702705P4
Quad Analog Switch
U701 & U705
19A703483P302
Quad 2-Input NAND Gate
U702
19A703471P120
Address Decoder
LBI-38671
7

OUTLINE DIAGRAM
UHF TRANSMITTER
SYNTHESIZER BOARD
19D902779G3, G6 - G9
SOLDER SIDECOMPONENT SIDE
(19D902779, Sh. 2, Rev. 2)
(19D903361, Layer 1 & 4, Rev. 0)
LBI-38671
8

SCHEMATIC DIAGRAM
UHF TRANSMITTER SYNTHESIZER
19D902780G3, G6 - G9
(19D903363, Sh. 1, Rev. 5)
LBI-38671
9

SCHEMATIC DIAGRAM
UHF TRANSMITTER SYNTHESIZER
19D902780G3, G6 - G9
(19D903363, Sh. 2, Rev. 3)
LBI-38671
10

SCHEMATIC DIAGRAM
UHF TRANSMITTER SYNTHESIZER
19D902780G3, G6 - G9
(19D903363, Sh. 3, Rev. 2)
LBI-38671
11