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Mobile Communications
Maintenance Manual
LBI-31567
65-110 WATT
MOBILE RADIO
DELTA-S
NARROW BAND, SYNTHESIZED
403-430-450-512 MHz
Mobile Communications
(NEGATIVE GROUND ONLY)
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LBI-31567
TABLE OF CONTENTS
MILITARY SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
COMBINATION NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
STRUCTURED OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
FREQUENCY SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CONTROL UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CHANNEL SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MICROPHONE AND HANDSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
HOOKSWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
INITIAL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TRANSMITTER ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RECEIVER ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TO RECEIVE A MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TO TRANSMIT A MESSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ILLUSTRATIONS
FIGURE 1 - TYPICAL MODULE LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
WARNING
Although the highest DC voltage in Mobile Two-Way Radio Equipment is supplied by the vehicle battery, high currents
may be d rawn under short c ir cuit co nditions. Th ese c urrents c an p ossibly h eat o bjects such as t ools, ri ngs, wa tchbands,
etc., enough to caus e burns. B e careful when working near energized ci rcuits.
High-level RF energy in the Transmitter Power Amplifier assembly can cause burns upon contact. Keep away from
these circuits w h en the t ra nsmitter is energize d!
Copyright© November 1985, General Electric Company
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LBI-31567
MILITARY SPECIFICATIONS
STANDARD METHODS/PROCEDURES
MIL-STD-810-C MIL-STD-810-D
Low Pressure 500.1/Procedure 1 500.2/Procedure 1
High Temperature 501.1/Procedure 1,2 501.2/Procedure 1,2
Low Temperature 502.1/Procedure 1 502.2/Procedure 1,2
Temperature Shock 503.1/Procedure 1 503.2/Procedure 1
Solar Radiation 505.1/Procedure 1 505.2/Procedure 1
Humidity 507.1/Procedure 2 507.2/Procedure 2
Vibration 514.2/Procedure 8, 10 514.3/Procedure 1
Shock 516.2/Procedure 1,2,3,5 516.3/Procedure 1, 3, 4, 5, 6
SYSTEM SPECIFICATIONS*
FREQUENCY RANGE 403-430 MH z** & 450-512 M Hz
BATTERY VOLTAGE 13.8 volts ±20% RX
13.6 or 13 . 4 vol ts ±20% TX
BATTERY D RAIN (Maximum)
Receive
Squelched 0.7 amperes
Unsquelched 2.2 amperes
Transmit
35/40 watts 10.0 amperes at 13.6 volts
30 watts (DOC***) 10.0 amperes at 13.6 volts
50 watts 12.0 ampe res a t 13 .6 v o lt s
80 watts 21.0 ampe res a t 13 .4 v o lt s
90 watts 22.0 ampe res a t 13 .4 v o lt s
100 watts 23.0 ampe res a t 13. 4 v ol ts
FREQUENCY STABILITY 0.0005% or optional 0.0002%
TEMPERATURE RANGE -30°C (-22°F) to +60°C (140°F)
DUTY CYCLE 100% Receive, 20% Transmit (EIA )
DIMENSION, LESS ACCESSORIES (H x W x D)
35-50 watts 65 mm x 260 mm x 325 mm
(2.5 x 10.2 x 12.7 inch es )
80-100 watts 65 mm x 290 mm x 325 mm
(2.5 x 11.4 x 12.7 inch es )
WEIGHT, LESS AC CESSORIES
35-50 watts 5.9 kg (12.9 pounds)
80-100 watts 6.5 kg (14 pounds)
* These s p ec ific ations a re intended primarily for the u s e of th e se rvi cema n. Re fe r to th e ap pro p ria te
Specifications Sheet for the complete specifications.
** 403-430 MHz combinations are for International use (50 Watt Transmitters). 421-430 MHz
combinations may be used for domestic applications.
*** Canadian Department of Transportation.
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LBI-31567
GENERAL
FCC FILING NUMBER (see table below):
RECEIVER TRANSMITTER OSCILLATOR
STABILITY
ER-140-B
ER-140-C
ER-140-D
ER-140-B
ER-140-C
ER-140-D
KT-218-B
KT-220-B
KT-221-B
KT-223-B
KT-221-C
KT-223-C
KT-218-B2
KT-220-B2
KT-221-B2
KT-223-B2
KT-221-C2
KT-223-C2
±5 PPM
±5 PPM
±5 PPM
±5 PPM
±5 PPM
±5 PPM
±2 PPM
±2 PPM
±2 PPM
±2 PPM
±2 PPM
±2 PPM
POWER
OUTPUT
40 WATTS
100 WATTS
35 WATTS
90 WATTS
35 WATTS
80 WATTS
40 WATTS
100 WATTS
35 WATTS
90 WATTS
35 WATTS
80 WATTS
DOC FILING NUMBER: RSS-119
TRANSMITTER
CONDUCTED SPURIOUS -85 dB
MODULATION ±4.5 kHz
AUDIO SENSITIVITY 70 to 120 millivolts
FREQUENCY
450-470 MHz
450-470 MHz
470-494 MHz
470-494 MHz
494-512 MHz
494-512 MHz
450-470 MHz
450-470 MHz
470-494 MHz
470-494 MHz
494-512 MHz
494-512 MHz
AUDIO FREQUENCY CHARACTE RISTI CS Within +1 dB to -4.5 dB of a 6 dB/octave pre-emphasis
from 300 to 3000 Hz per EIA standar ds. Post li mite r
filter standar d s per FCC and EIA.
DISTORTION Less than 2% (1000 Hz)
Less than 5% (300 to 3000 Hz)
DEVIATION SYMMETRY 0.5 kHz maximum
MAXIMUM FREQUENCY No Center Center
Tuning Tuning
450-512 MHz 6 MHz 12 MHz
403-430 MHz 5 MHz 10 MHz
RF OUTPUT IMPEDANCE 50 ohms
POWER OUTPUT Rated Power ±0.5 dB
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RECEIVER
AUDIO OUTPUT 12 Watts with less than 3% distortion.
(to 4.0 ohm speak e r)
LBI-31567
SENSITIVITY
Standard UHS Preamp
12 dB SINAD 0.35 mV 0.20 mV
(EIA Method)
20 dB Quieting 0.50 mV 0.25 mV
Method
SELECTIV ITY
EIA Two-signal Method -90 dB -90 dB
SPURIOUS RESPONSE -100 dB -90 dB
INTERMODULATION -85 dB -80 dB
MODULATION ACCEPTANCE ±7.0 kHz
SQUELCH SENSITIVITY 8 dB SINAD
MAXIMUM FREQUENCY SPREAD 1 dB
No degradation
Center Center with Center
Tuning Tuning Tuning
1 MHz 2 MHz 2.5 MHz
FREQUENCY RESPONSE Wit hin +2 and -8 dB of a standard 6 dB per octave
de-emphasis curv e from 300 to 3000 Hz (1000 Hz
reference).
RF INPUT IMPEDANCE 50 ohms
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Digit R
Receiver
Type
A
UHS
Pre Ampl
O
None
Digit 10
Frequency
Capacity
T
16 Channel
Z
32 Channel
W
494-512
MHz
LBI-31567
COMBINATION NOMENCLATURE
Product Code
N3
DELTA S
Transmit
Frequency
Range
R
403-430
MHz
U
450-470
MHz
V
470-494
MHz
Receive
Frequency
Range
R
403-430
MHz
U
450-470
MHz
V
470-494
MHz
W
494-512
MHz
Spacing
2
25 kHz
TypeChannel
N
Narrow Band
Digits 7-9Digit 6Digit 5Digit 4Digit 3Digits 1 & 2
RF Power
Output
035
35 Watts
040
40 Watts
050
50 Watts
090
90 Watts
Digit 11
Oscillator
Stability
A
±2 PPM
A
±5 PPM
ming
O
Test Program
1
Customer
Program
2
S950
Download
OptionProgram-
O
None
N
MII Interface
STRUCTURED OPTIONS
Guard
O
None
B
Tone/
Digital
O
Standard
N
None
Std Frame &
Mtg Hdwe
None
O
N
100
100 Watts
Digit NDigit MDigit FDigit DDigit CDigitA
AntennaMountingFuseChannel
O
None
A
Whip
Digit V
Voice Guard
O
None
G
Voice Guard
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LBI-31567
DESCRIPTION
General Electric DELTA-S mobile radio combinations
are completely solid state utilizing microcomputer technology and integrated circuits to provide high quality - high
reliability radios. The DELTA-S radio is designed for use
in vehicles having a negative ground battery system. In
vehicles having a positive ground battery system a polarity
converter must be used. Standard combinations may be
equipped with:
• Microcomputer Controlled Frequency
Synthesizer
• Up to 32 channels
• 0.0002% or 0.0005% frequency stability
• UHS Preamplifier (Ultra High Sensitivity),
optional
• Tone and/or Digital Channel Guard, optional
The radio set is housed in a weather resistant case only
2 1/2 inches high. The radio is secured to the vehicle by a
bottom mounting plate, and is tamper proof when locked
into the plate. When unlocked, the handle can be pulled out
of the mounting plate or the top cover removed for servicing. When pulled down, the handle can be used to carry the
radio.
The PA board is inserted into the radio from the top of
the frame, while the TRS board is inserted from the bottom.
There are no wires used in the basic radio. Interconnections
are provided by pins on the TRS board that mate with
connectors on the PA assembly. A power bus connects A+
and A- from the front con nector to the PA assembly. The
PA board is isolated from ground (floating). Power is
supplied directly from the battery to the PA power output
stage.
The radio is of single-layer construction with all major
modules and tuning adjustments easily accessible from the
top of the radio.
Centralized metering jacks for the transmitter, receiver
and system functions are provided for simplified alignment
and troubleshooting.
Figure 1 - Typical Module Layout
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LBI-31567
Excluding option boards, the basic radio mounted in a
cast aluminum frame. The two boards are the transmitterreceiver-system (TRS) board 19D9901620G1 and the
power amplifi er board (see Figure 1). The T RS board is
connected to chassis ground allowing it to be used in
vehicles with a negative ground battery system only. Option boards include the Channel Guard board and VG
Interface board. The VG In terface boar d is use d in radios
equipped with Voice Guard.
FREQUENCY SYNTHESIZER
The frequency synthesizer consists of a microcomputer, electrically erasable PROM(S) (EEPROM), a frequency synthesizer IC, transmit and receive VCO’s and
associated circuitry. The frequency synthesizer under control of the microcomputer generates all transmit and receive RF frequencies.
EEPROM
The EEPROM stores binary data for all RF frequencies, Channel Guard tones/digital codes, and the timing
function of the Carrier Control Timer (CCT). The microcomputer accesses the EEPROMS and provides the correct
WALSH bits t o the Channe l Guard board t o generate the
correct Channel Guard tone or digital code on a per channel
basis.
Alternatively, a single channel Programmer Model
4EX22A10 allows the user to reprogram the radio on a per
channel basis. This programmer requires the removal of the
radio top cover and any option boards present. A special
programming jack, J711, is provided in the radio for interconnections.
Programming instructions are provided in the respective Programmer Maintenance Manuals.
TRANSMITTER
The transmitter consists of the exciter, frequency synthesizer, TX VCO, and a power amplifier assembly. The
PA assembly consists of a PA board mounted along the side
of the radio next to the heat sink assembly. The PA board
also contains a hermetically sealed anten na relay and a low
pass filter.
RECEIVER
The receiver consists of the frequency synthesizer, RX
VCO, injection amplifiers, front end, IF and limiter detector. In UHS receivers, a pre-amplifier board is add ed in the
receiver front end. Audio and squelch circuitry for the
receiver is located in the system section of the TRS board.
Jacks fo r the Channel Guard a nd o ther st ructu red opt ions
are also located in the system area.
PROGRAMMING
The EEPROM allows the radio to be reprogrammed as
needed to adapt to changing system requirements. RF frequencies, Channel Guard tones and digital codes, and the
CCT function can be reprogrammed.
Depending on the configuration of the radio, one or
two EEPROMs may be provided. Radios not equipped with
a MODE A/B switch wil l have on e EEPROM. Radios with
more than 16 channels and those with the MODE switch
will have two EEPROMs.
NOTE
When programming, remember th at all RF frequen-
cies must be divisib le b y 12 .5 k H z.
The EEPROMs can be reprogrammed through the
radio front connector using the General Electric Universal
PROM Programmer Model TQ2310. This programmer allows all information to be loaded simultaneously.
CONTROL UNITS
Several "S" series control units are available for use
with the DELTA-S radio combinations.
The S-500 control unit contains an on-off volume
control switch, a rotary channel selector switch for 1, 8, or
16 channels, a MODE A/B switch (optional) to expand the
channel select capability to 32, seven segment channel
indicator(s), a red transmit indicator, channel busy indicator (optional ), and an external tone option jack. Opti ons
that may be used with this control unit include Type 90 and
99 tone, squelch operated relay SOR, GE-STAR encoder,
and public address.
The S-600 control unit contains an on-off volume
control switch, squelch disable switch, red transmit indicator, and a seven segment channel indicator. A rotary chan nel select switch permits selection of up to eigh t chann els .
A white power-on i ndicator is used for back lighti ng the
front panel. Space is provided for two optional push-button
switches and two optional indicators.
The S-900 series control units designed specifically
for the DELTA class radios are h ighly versatile, software
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LBI-31567
controlled units providing numerous functions and options
inclu di n g:
• Dual Priority Scan
• Digital Volume Control
• Digital Squelch Control
• Type 90 or 99 Enc o de T ones
• GE-STAR Identification
• 128 Channels in -
8 Modes of 16 Channels each
or
4 Modes of 32 Channels each
• Carrier Control Timer (per mode basis)*
• Channel Guard - Tone or Digital*
• Channel Frequencies*
• Home Channel Revert
• Auxiliary Relay Control
* These fea tures a r e ac t uall y performed in the radio.
If you have downloaded, the data is stored in the
control unit.
CHANNEL SELECTION
An optional telephone-type handset is available for
use with the radio. The handset uses a dynamic microphone
with a built in m icrophone pre-amplifier. The extenda ble
coiled cord plugs into the microphone jack on the back of
the control unit, and is secured to the jack by a retaining
screw.
HOOKSWITCHES
In Channel Guard or other tone applications, a microphone or handset hookswitch is supplied with the radio.
The hookswitches are equipped with a Channel Guard
disable switch.
Placing the switch in the "up" position (towards the
small speaker symbol) disables the Channel Guard decoder. With the switch in the "down" position, the Channel
Guard is disabled when the microphone or handset is
removed from the hookswitch.
SPEAKER
A three by five-inch speaker contained in a molded
plastic housi ng provides an a udio output of 1 2 watts with
a speaker impedance of four ohms. The speaker leads are
terminated in Vehicle Systems Plug P3 which connects to
J1-A on the rear of the control unit.
Depending on the control unit used, a single rotary or
push-button selector s witch will se lect up t o 16 chan nels.
In radios equipped with more than 16 channels, the control
unit contains a MODE A/B switch. The MODE switch
allows the user to select a second set of 16 channels
(17-32).
The MODE A/B switch may be used to provide mobile-to-mobile communications through an intermediate
repeater (repeated path) or direct mobile-to-mobile communications. For example, channel 1 Mode A may be
programmed for the repeater frequency (repeated path)
while channel 1 Mode B would be programmed for the
mobile receive frequency (direct path). Judicious programming will a llow selection of repeated or di rect communications paths on selected channels.
MICROPHONE AND HANDSET
A hand-held microphon e with a built-in, transistorize d
microphone pre-amplifier is available for use with the
radio. The microphone is housed in a sturdy two-piece
case, and the extendable coiled cord plugs into the microphone jack at the back of the control unit. The plug is
secured to the jack by a retaining screw.
INITIAL ADJUSTMENT
After the radio has been installed (as described in the
Installation Manual), the following adjustments should be
made by a certified electronics technician.
TRANSMITTER ADJUSTMENT
The transmitter adjustments include measuring the
forward and reflected power and optimizing the antenna
length, then setting the transmitter t o rated power outp ut.
Next, measuring the frequency and modulatio n and recording these measurements for future reference. For the complete transmitter adjustment, refer to the Alignment
Procedure in the service section of this manual.
RECEIVER ADJUSTMENT
The initial adjustment for the receiver includes tuning
the input ci rcuit to match the an tenna. Refer to the Front
End Alignment Procedures in the service section of this
manual.
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LBI-31567
OPERATION
Complete operating instructions for the Two-Way Radio are provided in the Operator’s Manual. The basic
procedures for receiving and transmitting messages in mobile combinations are as follows:
TO RECEIVE A MESSAGE
1. Turn the radio on by t urning the OFF- VOLUME
control halfway to the right.
2. Turn the SQUELCH control clockwise (to the
right) as far as possible. A noise will be heard from
the speaker.
3. Ad just the VOLUME control for the desired listening level.
4. Turn the SQUELCH control counter-clockwise to
the left until the noise just cuts off.
5. In multi-frequency radios, select the desired channel.
3. Pick up the microphone and listen briefly to the
speaker to make sure that no one else is using the
channel.
4. Press the Push-To-Talk (PTT) switch on the microphone and send the message. The red transmit
light on the control unit will glow each time the
PTT switch is pressed.
MAINTENANCE
The use of microcomputer technology allows self-diagnostic maintenance routines to be incorporated in the
microcomputer software. These routines are easy to run
and provide a q uick analysis of microcomputer and frequency synthesizer operation.
The service section of this manual contains the diagnostic routines and other maintenance information to service this radio. The service section includes:
• System interconnection
• Mechanical layout
• Disassembly procedures
The radio is now operational.
TO TRANSMIT A MESSAGE
1. T urn the radio on and select the proper channel.
2. I f a lengthy message (or several messages) are to
be sent, the vehicle engine sh ould be running t o
maintain the battery charge.
• Replacement of IC’s, chip capacitors, and
resistors
• Microcomputer self-diagnostics
• Alignment procedures for the transmitter and
receiver
• Troubleshooting flow charts and waveforms
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Printed in U.S.A.
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