ACL SR-209 User manual

/
ACL |
VHF/UHF RECEIVER
TYPE SR-209
INSTRUCTION MANUAL
ASTRO COMMUNICATION LABORATORY
9125 Gaither Road
Gaithersburg, Maryland
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VHF/UHF RECEIVER
TYPE SR-209
INSTRUCTION MANUAL
Astro Communication Laboratory
9125 Gaither Road
Gaithersburg, Maryland
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FORE WARD
VHF/UHF Receiver Type SR-209 is a basic receiver of modular design
and variable arrangement. Plug-in modules and printed circuit assemblies
provide the versatility.
This manual is about the basic receiver and its printed circuit assem
blies. Plug-in modules are referenced for continuity in presentation. Detailed
information is contained in separate instruction manuals.
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TABLE OF CONTENTS
I
Paragraph Page
SECTION I
GENERAL INFORMATION
1. General 1-1
2. Electrical Description 1-2
3. Mechanical Description 1-3
4. Accessories Supplied 1-3
SECTION II
SPECIFICATIONS
1. Receiver 2-1
2. Tuning Head 2-2
3. IF Amplifier/Demodulator 2-4
4. Signal Display Unit 2-5
5. Battery Pack 2-6
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6. Electronic Swept Heads . 2-6
SECTION III
INSTALLATION AND OPERATION
1. General 3_1
2. Installation 3_1
A. Printed Circuit Assemblies 3-1
B. Plug-in Modules 3_2
C. Connections 3.2
3. Operation 3.3
A. Power Switch 3_4
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TABLE OF CONTENTS
Paragraph Page
SECTION III
(Cont)
B. FM Operation 3-4
C. AM and PAM Operation 3-5
D. CW Operation 3-5
E. Carrier Operated Relay 3-6
F. Turn-Off Procedure 3-6
SECTION IV
THEORY OF OPERATION
1. Functional Description 4-1
2. Typical Wideband IF Amplifier, IF-212-300 4-3
A. Similarities and Differences Between IF-212-300
and Other Wideband Amplifiers 4-3
B. IF-212-300, Functional Circuit Description 4-3
3. Typical Medium Bandwidth IF Amplifier, IF-211-100 4-4
A. Similarities and Differences Between IF-211-100
and Other Medium Bandwidth Amplifiers 4-4
B. IF-211-100, Functional Circuit Analysis 4-5
4. Typical Narrow Bandwidth IF Amplifiers, IF-210-20
andIF-215-10 4-6
5. Typical Narrow Bandwidth IF Amplifier, IF-112-10 4-7
A. Similarities and Differences Between IF-112-10 and
Other Narrow Bandwidth IF Amplifiers 4-7
B. IF-112-10, Functional Circuit Description 4-7
6. AGC Amplifier, AGC-202-2 4-9
in
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Paragraph Page
SECTION IV
(Cont)
7. Video Amplifier, VA-202-1 4-9
8. Audio Amplifier, AA-206 4-10
9. Carrier Operated Relay, COR-201 4-10
10. ±12 VDC Power Supplies, PS-103 4-10
11. 24 VDC Power Supply, PS-104 4-11
12. AFC Amplifier, AFC-203 (Optional) 4-11
SECTION V
MAINTENANCE
1. General ^-J-
2. Troubleshooting 5-1
3. Test Equipment 5~2
4. Preliminary Procedures for Measurement and
Alignment o-3
5. ±12 Volt Power Supply, PS-103 5-4
A. Normal Operating Voltages 5-4
B. Power Supply Adjustment 5-4
6. 24 Volt Power Supply, PS-104 5-4
A. Normal Operating Voltages 5-4
B. Power Supply Adjustment 5-5
7. IF-212 Family IF Amplifiers 5-5
A. Normal Operating Voltages 5-5
IV
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TABLE OF CONTENTS
Paragraph Page
SECTION V
(Cont)
B. Module Alignment 5-5
C. AM Alignment 5-6
D. FM Alignment 5-6
8. IF-211 Family IF Amplifiers 5-8
A. Normal Operating Voltages 5-8
B. Module Alignment 5-9
C. AM Alignment 5-9
D. FM Alignment 5-10
9. IF-210 or IF-215 IF Amplifiers 5-10
A. Normal Operating Voltages 5-10
B. Module Alignment 5-10
C. AM Alignment 5-12
D. FM Alignment 5-12
10. IF-112 Family IF Amplifiers 5-13
A. Normal Operating Voltages 5-13
B. Module Alignment 5-14
C. AM Alignment 5-14
D. FM Alignment 5-15
11. AGC Amplifier, AGC-202-2 5-15
A. Normal Operating Voltages 5-15
B. Module Adjustment 5-16
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TABLE OF CONTENTS
Paragraph Page
SECTION V
(Cont)
12. Audio Amplifier, AA-206 5-16
A. Normal Operating Voltages 5-16
B. Module Adjustment 5-16
13. COR Amplifier, COR-201 5-17
A. Normal Operating Voltages 5-17
B. Module Adjustment 5-17
14. Other Measurements 5-18
SECTION VI
PARTS AND MANUFACTURERS LIST
1. Parts List 6-1
Receiver SR-209 6-2
300 KHz IF Amplifier, IF-212-300 6-7
100 KHz IF Amplifier, IF-211-100 6-13
20 KHz IF Amplifier, IF-210-20 6-18
10 KHz IF Amplifier, IF-112-10 6-24
AGC Amplifier, AGC-202-2 6-29
Video Amplifier, VA-202-1 6-31
Audio Amplifier, AA-206 6-32
Carrier Operated Relay, COR-201 6-34
±12 VDC Power Supply, PS-103 6-35
24 VDC Power Supply, PS-104 6-36
AFC Amplifier, AFC-203
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VI
6-37
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TABLE OF CONTENTS
Paragraph Page
SECTION VI
(Cont)
2. Manufacturer's List 6-38
SECTION VII
ILLUSTRATIONS AND SCHEMATICS
Illustrations and Schematics 7-1
LIST OF ILLUSTRATIONS
Figure Page
1-1 VHF/UHF Receiver SR-209
1-2 Typical Receiver Configurations
3-1 SR-209 Receiver, Top View
3-2 SR-209 Receiver, Rear View
3-3 Operator's Controls and Indicators
4-1 SR -209 Functional Block Diagram
5-1 IF Amplifier Alignment Test Setup
5-2 IF-212 Family AM Response
5-3 IF-212 Family FM Discriminator Response
5 - 4 I F - 2 1 1 F a m i l y A M R e s p o n s e
5-5 IF-211 Family FM Discriminator Response
5-6 IF-210 and IF-215 AM Response
5 - 7 I F - 2 1 0 a n d I F - 2 1 5 F M D i s c r i m i n a t o r R e s p o n s e
5 - 8 I F - 1 1 2 F a m i l y A M R e s p o n s e
5 - 9 I F - 1 1 2 F a m i l y F M D i s c r i m i n a t o r R e s p o n s e
vii
1-0
1-1
3-1
3- -2
3-4
4-0
5-7
5-7
5-8
5-10
5-11
5-12
5- -13
5- -14
5- -15
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TABLE OF CONTENTS
Figure Page
LIST OF ILLUSTRATIONS
(Cont)
7-1A Typical Wideband IF Amplifier, IF-212-300 7-2
7-1B IF Amplifier, IF-212-300, Schematic 7-2
7-2A Typical Medium Bandwidth IF Amplifier,
IF-211-100 7-3
7-2B IF Amplifier, IF-211-100, Schematic 7-3
7-3A Typical Narrow Bandwidth IF Amplifier,
IF-210-20 7-4
7-3B IF Amplifier, IF-210-20, Schematic 7-4
7-4A Typical Narrow Bandwidth IF Amplifier,
IF-112-10 7-5
7-5
7-4B IF Amplifier, IF-112-10, Schematic
7-5A AGC Amplifier, AGC-202-2 7-6
7-5B AGC Amplifier, AGC-202-2, Schematic 7-6
7-6A Video Amplifier, VA-202-1 7-7
7-6B Video Amplifier, VA-202-1, Schematic 7-7
7-7A Audio Amplifier, AA-206 7-8
7-7B Audio Amplifier, AA-206, Schematic 7-8
7-8A Carrier Operated Relay Amplifier, COR-201 7-9
7-8B Carrier Operated Relay Amplifier, COR-201,
Schematic 7-9
7-9A ±12 VDC Power Supply, PS-103 7-10
7-9B ±12 VDC Power Supply, PS-103, Schematic 7-10
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TABLE OF CONTENTS
Figure PaRe
LIST OF ILLUSTRATIONS
(Cont)
7-10A ±24 VDC Power Supply, PS-104 7-11
7-10B ±24 VDC Power Supply, PS-104, Schematic 7-11
7-11A AFC Amplifier, AFC-203 7-12
7-11B AFC Amplifier, AFC-203, Schematic 7-12
7-12 SR -209 Interconnection Diagram 7-13
LIST OF TABLES
Table
5- 1
5- 2
5- ■3
5- -4
5- -5
5- -6
5-7
5-8
5-9
5-10
5-11
5-12
5-13
5-14
Test Equipment Required 5-2
PS-103 Transistor Voltages 5-4
PS-104 Transistor Voltages 5-5
IF-212 Family Transistor Voltages 5-5
IF-212 Family Amplifier Characteristics 5-6
IF-212 Family FM Response Characteristics 5-8
IF-211 Family Transistor Voltages 5-9
IF-211 Family Amplifier Characteristics 5-9
I F - 2 1 1 F a m i l y F M R e s p o n s e C h a r a c t e r i s t i c s 5 - 1 0
IF-210 or IF-215 Transistor Voltages 5-11
IF-210 and IF-215 Amplifier Characteristics 5-11
IF-210 and IF-215 FM Response Characteristics 5-13
IF-112 Family Transistor Voltages 5-13
IF-112 Family Amplifier Characteristics 5-14
IX
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1
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1Table
1
15-15
5-16
I5-17
15-18
5-19
15-20
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TABLE OF CONTENTS
LIST OF TABLES
(Cont)
AGC-202-2 Transistor Voltages
AA-206 Transistor Voltages
COR-201 Transistor Voltages
VA-202-1 Transistor Voltages
AFC-203 Transistor Voltages
Main Chassis Transistor Voltages
Page
5-16
5-17
5-17
5-18
5-18
5-18
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Figure 1-1., VHF/UHF Receiver, SR-209
1-0
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SECTION I
GENERAL INFORMATION
1. General
The Astro Communication Laboratory (ACL) Type SR-209, Figure 1-1,
performs the requirements for general HF/VHF/UHF communication receiver
applications. It is completely solid state and features plug-in modules and
printed circuit subassemblies for the highest degree of versatility. Plug-in
modules are available in electronic swept heads covering 30 to 1000 MHz, in
tuning heads covering 2 to 12,000 MHz, in signal display units for panoramic
and signal analysis and in a battery pack which will supply power for field and
emergency operation. Combinations of plug-in modules are shown in Figure
1-2 in typical receiver configurations.
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Figure 1-2. Typical Receiver Configurations.
1-1
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2. Electrical Description
The SR-209 is capable of selection, control, demodulation and pro
cessing of FM, CW, AM and PAM (pulse) RF signals. Mounted on the SR-209
(main chassis) are all plug-in printed circuit assemblies essential to plug-in
module and receiver performance. On the front panel are all switches, con
trols and meters relative to proper operation.
Regulated power supply voltages, ±12 and +24 vdc, are derived from
an integral power supply which is fed via a power cable from an external
115 or 230 vac source. Power supply circuits are energized by the POWER
switch and voltages are applied as selected. The receiver is completely
transistorized and cooling is accomplished by natural principles of convection
and radiation.
The SR-209 is set for the type of input signal to be processed by the
FM, CW, AM and PAM selector. Set at FM, AM and PAM, the gain of the
receiver is controlled internally by an AGC source. A customer option for
FM reception is AFC. At CW, RF GAIN provides the overall receiver gain
adjustment. As a tuning aid for CW reception, a crystal controlled BFO
circuit is included on IF amplifier/demodulator printed circuit assemblies
with bandwidths of 250 KHz or less. BFO PITCH control on the tuning head
provides the beat note adjustment which is supplied as audio to the front
panel PHONES jack and to rear panel speaker terminals.
Three IF amplifier/demodulator printed circuit assemblies are accept
able to the receiver with instantaneous IF BANDWIDTH switching. For use
with the SH-100 series tuning heads which have an IF output of 455 KHz, IF
bandwidths of 1, 5, 10, 20 and 50 KHz are available. For the SH-200 series
tuning heads which have an IF output of 21.4 MHz IF, bandwidths are available
from 10 KHz to 4000 MHz. The exception is the SH-200P tuning head which
cannot be used with an IF amplifier whose bandwidth exceeds 500 KHz.
Meters are on the front panel to indicate when the input signal is
centered in the IF passband (TUNING) and the relative input amplitude
(SIGNAL STRENGTH). For remote sensing applications a carrier operated
relay mutes the audio output for no carrier periods. Time delay is variable
and is introduced by the COR DELAY switch on the rear panel. Front panel
COR/SQUELCH SENS control and COR indicator lamp permits adjustment
for the desired trigger level of COR operation.
The receiver may be used with any antenna which has a 50 ohm
nominal impedance, operates in an unbalanced configuration and has a fre
quency range covering the tuning head in use.
1-2
1
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3. Mechanical Description
The receiver is 3-1/2" high, 15-1/16" long, 16-7/8" wide and fits a
standard 19" electrical equipment rack. The receiver, with two tuning head
modules installed weights approximately 25 pounds. Handles are on the front
and rear panel to provide a grip for installation and to protect the meters,
controls and connectors from damage. Facilities of the receiver permit the
installation of two 3-1/2" high, 4-3/4" wide and 13-3/4" long plug-in modules
at the front panel and seven 3-3/4" long by 2-1/2" wide and five 8" long by
2-1/2" wide printed circuit assemblies on the main chassis. Two of the
printed circuit assemblies, one large and one small, are supplied as card
extenders for testing.
The front, back, side panels and main deck of the receiver are
aluminum. An aluminum overlay on the front panel has etch-engraved mark
ings, filled with black enamel. Rear panel and main chassis markings are
black, silk screened. Top and bottom dust covers are aluminum and slide
off along the side panels to facilitate maintenance. The printed circuit
assemblies are exposed when the top cover is removed. Removal of the
bottom cover permits access to the printed circuit receptacles, the wiring
harness and the power transformer.
A power cable is provided for connection at the rear panel. A type
N connector is used for RF INPUT, Jl, J2. SDU OUTPUT, J3 and VIDEO
OUTPUT, J9 are type BNC. Terminal board TBI provides connection for
audio output and COR contacts. J8, 115 VAC, 50-400 Hz is a Hubbell No.
7486 power receptacle. Switch S4 provides COR DELAY. S5 and S6 permit
operation from 115 or 230 VAC. Fl is the 1 AMP SLO-BLOW fuse holder
for 115 vac operation. F2 is a 1/2 AMP SLO-BLOW fuse holder for 230 vac
operation.
4. Accessories Supplied
The SR-209 receiver is supplied with an instruction manual and a
power cord. Alignment tools for general maintenance are mounted on card
extenders in spare printed circuit receptacles.
1-3
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SECTION II
SPECIFICATIONS
1. Receiver
Frequency Tuning Range
Tuning Heads 2 to 12, 000 MHz, refer to para
graph 2
Electronic Swept Heads 30 to 1000 MHz, refer to para
graph 6
Type of Reception FM, AM, CW and PAM (pulse)
Input Impedance 50 ohms nominal, unbalanced to
ground
AM Stability:
VHF Less than 6 db output variation for
input range of 70 db above 3. 5 uv
UHF Less than 6 db output variation for
input range of 70 db above 5 uv
FM Stability:
IF Bandwidths From 10
to 300 KHz Less than 2 db output variation
for input above 1. 5 uv
IF Bandwidths 500 KHz
and Wider Output varies less than 2 db for
input above 4 uv
Pulse Stability Less than 10 db output variation
for input range of 70 db above 5 uv
Audio Power Output 100 mw minimum into 600 ohm
load for external speaker
Video Amplifier Output 5 volts peak-to-peak into a 93
ohm load
Video Amplifier Response Less than 3 db variation from
20 Hz to 4 MHz when terminated
in a 93 ohm load
2-1
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Audio Amplifier Response Less than 3 db variation from
90 Hz to 43 KHz when properly
terminated
Video Output Impedance 93 ohms, unbalanced
BFO Operable with 10 to 250 KHz band-
widths
BFO Pitch ±20 KHz minimum
Signal Display Output :
HF SDU 455 KHz center frequency
VHF/UHF SDU 21. 4 MHz center frequency
Power Supply 115 or 230 vac, 50 to 400 Hz,
single-phase
Power Consumption 25 watts approximately with signal
display unit
Weight 30 pounds maximum
Dimensions 3-1/2" H x 15-1/16" D x 16-7/8" W
Finish Gray enamel, MIL-E-15090,
Color No. 26329, FED STD 595
2. Tuning Head
NOTE
All tuning heads use the superheterodyne
technique. The approximate weight for
each tuning head is 5 pounds and the dim
ensions are 3. 5 inches height, 4. 75 inches
wide, and 13.75 inches deep.
Fine Tuning Included on all tuning heads
Frequency Readout Calibrated dial tape
LO Output Optional, 50 mv min
2-2
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Model and Noise IF Rej. Image Rej. Oscillator
Range Figure Min. Min. Radiation
(MHz) (db max) (db) (db) Max. (uv)
SH-102P 6.0 60 60 5
(2 to 6)
SH-103P 6.0 90 60 5
(6 to 20)
SH-104P 6.0 90 60 5
(20 to 45)
SH-200P 4.5 90 65 10
(20 to 45)
SH-270P 4.5 60 60 10
(20 to 70)
SH-201P 4.5 to 90, 5.5 60 60 8
(30 to 100) above 90 MHz
SH-271P 6.5 60 60 15
(55 to 260)
SH-202P 6.5 80 50 15 to 260, 25
(90 to 300) above 260 MHz
SH-272P 8. 0 100 90 8
(225 to 400)
SH-203P 10 90 60 5
(250 to 500)
SH-204P 12 90 80 50
(490 to 1000)
SH-205P 14 90 60 300
(990 to 2000)
SH-206P 15 90 60 300
(1990 to 4000)
SH-207P-1 16 80 60 300
(4000 to 7000)
SH-208P-1 18 80 60 300
(7000 to 12000)
2-3
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3. IF Amplifier/Demodulator
Three interchangeable IF amplifier printed circuit assemblies
may be installed in the receiver. A BFO is included on those with band-
widths of 250 KHz or less.
Series IF 3 db IF A M S e n s i t i v i t y F M S e n s i t i v i t y
Tuning Ampl BW Freq. (input for 10 db (input for 21 db
Head Module (KHz) (MHz) S+N/N min) S±N/N min)
SH-100 IF - 112 - 01 10.455 . 3 uv, mod. 50%
at 400 Hz rate
SH-100 IF-112-05 50. 455 .7 uv, mod. 50%
at 400 Hz rate
SH-100 IF-112-10 10 0. 455 1 uv, mod. 5 0%
at 1 KHz rate
SH-200 IF-210-20 20 21.4 & 2 uv, mod. 5 0% 2 uv, mod. at
(VHF) 1. 65 at 1 KHz rate for
17 db S±N/N min
1 KHz rate, 7
KHz deviation
SH-200 IF-211-60 60 21. 4 & 2 uv, mod. 50% 2 uv, mod. at
(VHF) 2. 5 at 1 KHz rate 1 KHz rate, 20
KHz deviation
SH-200 IF-211-100 100 21. 4 & 3 uv mod. 50% 3 uv, mod. at
(VHF) 2. 5 at 1 KHz rate 1 KHz rate, 30
KHz deviation
SH-200 5 uv, mod. 50% 5 uv mod. at 1
(UHF) at 1 KHz rate KHz rate, 30 KHz
deviation
SH-200 IF-212-300 300 21.4 4 uv, mod 50% 4 uv, mod. at
(VHF) at 1 KHz rate 1 KHz rate, 100
KHz deviation
SH-200 8 uv, mod. 50% 8 uv, mod. at
(UHF) at 1 KHz rate 1 KHz rate, 100
KHz deviation
SH-200 IF-212-500 500 21. 4 5 uv, mod. 5 0% 5 uv, mod. at
(VHF) at 1 KHz rate 1 KHz rate, 170
KHz deviation
SH-200 10 uv, mod. 5 0% 10 uv, mod. at
(UHF) at 1 KHz rate 1 KHz rate, 170
KHz deviation
2-4
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