Advantech ARMA-K100-CRM User manual

INSTALLATION AND OPERATING MANUAL
100 W Ku-BAND RACK-MOUNT
SOLID STATE POWER AMPLIFIER
ARMA-K100-CRM
PM 101-632650-140 REV. 2

ARMA-K100-CRM
1
WARRANTY
This ADVANTECH Advanced Microwave Technologies, Inc. product is warranted against
defects in material and workmanship for a period of 2 years from date of shipment. During the
warranty period, ADVANTECH Advanced Microwave Technologies, Inc. will, at its option,
either repair or replace products that will prove to be defective.
To return a product for warranty or repair service, you must first request a Return Material
Authorization (RMA) number by contacting ADVANTECH at:
Phone: [phone] or Fax: [phone]
Website: www.AdvantechAMT.com or e-mail: [email protected]
The unit should be shipped to the following address, in original shipping container (box), with
shipping charges prepaid.
ADVANTECH Advanced Microwave Technologies, Inc.
657 Orly Avenue
Dorval, Quebec
H9P 1G1
CANADA
Please indicate the RMA number on all shipping documentation.
Units shipped without prior issued RMA, or shipped not in original packing, may be subject of
rejection and returned at sender’s own expense.
LIMITATIONS OF WARRANTY
ADVANTECH Advanced Microwave Technologies, Inc. warrants this product to be free of
materials and workmanship defects.
The foregoing warranty shall not apply to defects resulting from improper handling or abuse by
the Buyer, unauthorized modification, operation outside of the environmental specifications for
the product, or improper installation or maintenance.
ADVANTECH Advanced Microwave Technologies, Inc. shall not be liable for any direct,
indirect, special, incidental or consequential damages.

ARMA-K100-CRM
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CONTENTS
1. SAFETY.................................................................................................................................................6
2. GENERAL INFORMATION .................................................................................................................9
2.1 INTRODUCTION.............................................................................................................................9
2.2 DESCRIPTION ................................................................................................................................9
2.2.1 Power Supply.................................................................................................. 9
2.2.2 HPA Assembly................................................................................................9
2.2.3 Monitor and Control Assembly ......................................................................... 9
2.3 PACKING LIST .............................................................................................................................10
2.4 SPECIFICATIONS.........................................................................................................................16
3. INSTALLATION .................................................................................................................................23
3.1 MOUNTING CONSIDERATIONS..................................................................................................23
3.2 INSTALLATION PROCEDURE.....................................................................................................23
4. OPERATION .......................................................................................................................................24
4.1 INTRODUCTION...........................................................................................................................24
4.2 FRONT PANEL CONTROLS .........................................................................................................24
4.2.1 Front Panel Menu System............................................................................... 25
4.3 REMOTE INTERFACE ..................................................................................................................25
4.3.1 Software Installation and Set-up...................................................................... 25
4.3.2 Using the RS-485 Serial Interface....................................................................26
INITIAL MENU (SCREEN) PAGE ............................................................................ 27
MENU (SCREEN) PAGE #1...................................................................................... 28
MENU (SCREEN) PAGE #2...................................................................................... 30
MENU (SCREEN) PAGE #3 ......................................................................................... 32
4.4 DISCRETE INTERFACE................................................................................................................33
4.4.1 RF Enable..................................................................................................... 33
5. CONFIGURATION AND SET-UP.......................................................................................................34
5.1 SOFTWARE CONFIGURATION....................................................................................................34
5.2 RF CONFIGURATION...................................................................................................................34
5.2.1 Safety Considerations.....................................................................................34
5.3 START-UP.....................................................................................................................................35
5.4 SELECT LOCAL CONTROL MODE..............................................................................................35
5.5 SETTING FAULT CONDITION FOR LOW OUTPUT POWER .......................................................36
5.5.1 At the Front Panel..........................................................................................36
5.5.2 Using the Serial Interface................................................................................ 36

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5.6 GAIN ADJUSTMENT ....................................................................................................................37
5.6.1 At the Front Panel..........................................................................................37
5.6.2 Using the Serial Interface................................................................................ 37
5.7 POWERING UP THE AMPLIFIER .................................................................................................37
5.7.1 At the Front Panel..........................................................................................37
5.7.2 Using the Serial Interface................................................................................ 38
5.8 STATUS DISPLAY SCREENS .......................................................................................................38
5.9 AMPLIFIER SHUTDOWN.............................................................................................................38
5.10 RF OUTPUT MONITOR PORT ......................................................................................................39
5.10.1 Monitor Calibration Chart............................................................................ 39
5.11 RF INPUT MONITOR PORT..........................................................................................................39
6. ALARMS AND FAULTS......................................................................................................................40
6.1 THERMAL ALARMS AND FAULTS.............................................................................................40
6.2 RESETTING THE SSPA.................................................................................................................40
6.2.1 Using the Serial Interface................................................................................ 40
6.2.2 At the Front Panel..........................................................................................40
7. MAINTENANCE .................................................................................................................................41
7.1 CLEANING ...................................................................................................................................41
7.2 PRECAUTIONS.............................................................................................................................41
7.2.1 Connection to Line Voltage ............................................................................ 41
7.2.2 RF Radiation Hazard...................................................................................... 41
7.2.3 Non User-serviceable Modules........................................................................41
7.3 FUSES AND CIRCUIT BREAKERS...............................................................................................41
7.3.1 Fuses............................................................................................................ 41
7.3.2 Circuit Breakers............................................................................................. 41
7.4 MAIN FAULT DIAGNOSIS ...........................................................................................................42
7.5 POWER SYSTEM FAULT DIAGNOSIS.........................................................................................42
7.6 SSPA FAULT DIAGNOSIS ............................................................................................................43
7.7 TEMPERATURE FAULT DIAGNOSIS...........................................................................................43
7.8 LOW OUTPUT POWER FAULT DIAGNOSIS................................................................................43
7.9 HIGH REFLECTED POWER FAULT DIAGNOSIS.........................................................................43
7.10 MODULE REPLACEMENT...........................................................................................................43
8. APPENDIX A: SAFETY AND EMC COMPLIANCE ..........................................................................44

ARMA-K100-CRM
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FIGURES
FIGURE 1: PRODUCT OUTLINE (REDUNDANT SYSTEM).................................................................. 12
FIGURE 2: WAVEGUIDE CONNECTIONS (TOP VIEW &SIDE VIEW)................................................. 13
FIGURE 3: BLOCK DIAGRAM (ONE UNIT)....................................................................................... 14
FIGURE 4: REDUNDANT SYSTEM BLOCK DIAGRAM ...................................................................... 15
FIGURE 5: BACK PANEL CONNECTORS.......................................................................................... 22
FIGURE 6: INITIAL PAGE OF THE COMMUNICATION PROGRAM...................................................... 27
FIGURE 7: PAGE #1 OF THE COMMUNICATION PROGRAM ............................................................. 28
FIGURE 8: PAGE #2 OF THE COMMUNICATION PROGRAM ............................................................. 30
FIGURE 9: PAGE #3 OF THE COMMUNICATION PROGRAM ............................................................. 32
FIGURE 10: DISCRETE INTERFACE – PROPOSED MONITOR AND CONTROL CIRCUIT...................... 33

ARMA-K100-CRM
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TABLES
TABLE 1: ELECTRICAL SPECIFICATIONS (EACH UNIT)...................................................... 16
TABLE 2: MECHANICAL SPECIFICATIONS ........................................................................ 17
TABLE 3: POWER REQUIREMENTS...................................................................................... 17
TABLE 4: ENVIRONMENTAL CONDITIONS........................................................................ 17
TABLE 5: FRONT PANEL DISPLAY AND CONTROLS....................................................... 17
TABLE 6: CONNECTORS......................................................................................................... 18
TABLE 7: RS-485 INTERFACE................................................................................................. 18
TABLE 8: SERIAL INTERFACE (J2) – PINS ASSIGNMENTS.............................................. 18
TABLE 9: DISCRETE INTERFACE (J3) – PINS ASSIGNMENTS......................................... 19
TABLE 10: REDUNDANT INTERFACE (J6) – PINS ASSIGNMENTS................................. 21
TABLE 11: STATUS INDICATORS ......................................................................................... 22
TABLE 12: REDUNDANT INDICATORS................................................................................ 22
TABLE 13: SERIAL RS-485 INTERFACE CONNECTION INFORMATION........................ 26

ARMA-K100-CRM
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1. SAFETY
In addition to this section, included by reference are the following pertinent sections of the
International Standard IEC-215, ‘Safety requirements for radio transmitting equipment’:
Appendix D, ‘GUIDANCE ON ASSESSING THE COMPETENCE OF PERSONNEL FOR
DESIGNATION AS SKILLED’ and also Sub-clause 3.1 of the Standard.
Appendix E, ‘GUIDANCE ON SAFETY PRECAUTIONS TO BE OBSERVED BY
PERSONNEL WORKING ON RADIO TRANSMITTING EQUIPMENT’, also Sub-clauses 3.2,
3.7 and 22.1 of the Standard.
To prevent the risk of personal injury or loss related to equipment malfunction Advantech uses
the following symbols for safety related information. For your own safety, please read the
information carefully BEFORE operating the equipment.
Symbols used in manual:
WARNING: This indicates a hazardous procedure that could result in serious injury or death if
not performed properly.
CAUTION: This indicates a hazardous and dangerous procedure that could result in light-
to-severe injury or loss related to equipment malfunction, if proper precautions
are not taken.

ARMA-K100-CRM
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----------------------------------------------- WARNING -----------------------------------------------------
When supplying power to this equipment, use the 3-pin connector provided, to connect to a
grounded power outlet. If power is supplied without grounding to the equipment, there is a risk
of receiving a severe or fatal electric shock.
In the context of this document any voltage that is lethal is viewed as ‘High Voltage’. Therefore,
even prime power (90 to 264 V AC) is dangerous because prime power potentials have been
known to cause death or injury.
----------------------------------------------- WARNING ----------------------------------------------------
The operator cannot repair this equipment. DO NOT attempt to remove the equipment cover
or to disassemble internal components. Only qualified service technicians should service this
equipment. There are high-voltage parts in this equipment presenting a risk of severe injury to
untrained personnel. In addition, there is a risk of damage to precision components.
----------------------------------------------- WARNING ----------------------------------------------------
ALWAYS TERMINATE THE OUTPUT WAVEGUIDE OF THE AMPLIFIER WITH AN
RF LOAD CAPABLE OF DISSIPATING FULL CW RF POWER. SIMILARLY
TERMINATE THE INPUT TO AVOID THE POSSIBILITY OF THE AMPLIFIER
BEING DRIVEN BY STRAY LEAKAGE SIGNALS. Incorporate the termination prior to
applying prime power to the amplifier. This procedure prevents self-oscillation and irradiation of
the local environment. Even if a source is not connected to the amplifier you are working with,
there are situations where the amplifier can go into a self-induced mode and generate high levels
of RF energy. Destruction caused under excessive load voltage standing wave ratio (VSWR) will
void the warranty. Although the equipment has internal protection for VSWR higher than 3:1
and will automatically go in shutdown (with a delay of 1 second), still it is a safe procedure to
avoid unwanted effects.

ARMA-K100-CRM
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----------------------------------------------- WARNING ----------------------------------------------------
DO NOT LOOK INTO THE OUTPUT PORT OF THE POWERED RF AMPLIFIER.
Treat the powered amplifier with extreme care. Keep in mind that levels of microwave radiation
that do not induce immediate physical discomfort in most individuals can be sufficiently high to
induce longer-term effects. Your eyes are particularly vulnerable parts of your body.
The permissible levels of exposure are quite low compared to the power levels of the amplifiers
built by Advantech (e.g. less than 10 mW versus 20 to 500 W delivered by various units). The
permissible levels are currently being studied by a number of organizations. In the past the U.S.
safety Code established a dosage rate of 10 mW/cm2. Currently there is consideration being
given to reducing the permissible level to 1 mW/cm2in the United States, as has been the case
for several European countries.

ARMA-K100-CRM
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2. GENERAL INFORMATION
2.1 INTRODUCTION
This manual contains information required to install and operate the 100 W, Ku-Band Rack-mount
Solid State Power Amplifier model ARMA-K100-CRM.
2.2 DESCRIPTION
The ARMA-K100-CRM is a Ku-Band 100 W solid-state power amplifier (SSPA) intended for
rack-mount (indoor) installation. It incorporates a DC main power supply and a forced air cooling
system. The SSPA product outline is shown in Figure 1 at page 12 & Figure 2 at page 13.A
block diagram for one unit is shown in Figure 3 at page 14.A redundant system block diagram is
shown in Figure 4 at page 15. Back panel connectors are shown in Figure 5 at page 22. Full
monitor and control capabilities are available from either the front panel or with the RS-485 serial
interface.
2.2.1 POWER SUPPLY
The main power supply provides a single output, DC high current to the HPA (High Power
Amplifier), the secondary power supply and a filtered, low current supply for operation of the
fans. The secondary power supply has multiple outputs for operation of the Monitor and Control
Assembly and the front panel display. The main power supply is configured for operation from
90-264 V AC. The fans are configured for 48V DC.
2.2.2 HPA ASSEMBLY
The HPA Assembly amplifies the RF input signal to a level sufficient for transmission. Integral
to this module are low noise and power amplifier sections as well as variable attenuation sections
that are used for temperature compensation and gain control. Other functionality includes
internal power conditioning, temperature monitoring & high temperature shutdown.
2.2.3 MONITOR AND CONTROL ASSEMBLY
The MCA (Monitor and Control Assembly) monitors all the important operating parameters of
the system, and communicates externally via serial and discrete interfaces as well as the front
panel controls and display.

ARMA-K100-CRM
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2.3 PACKING LIST
Item Quantity Description Part #
1. 2 Installation and Operating Manual 101-632650-140, Rev.2
2. 2 Ku-Band, 100 Watt Amplifier,
model ARMA-K100-CRM 100-632650-140
3. 1 Serial Communications Software (on 3½” diskette) 380-100796-001, Rev. 1.4
4. 1 Converter RS-485 to RS-232 PC Keyboard
powered 510-000485-001
5. 2 Connector D-Sub 25 Back Shell, with thumb
screws 631-000250-001
6. 2 Connector D-Sub 25 Sold Cup Plug 631-871380-001
7. 2 Connector D-Sub 9 Back Shell 631-925380-001
8. 2 Connector D-Sub 9 Sold Cup Plug 631-871380-003
9. 2 IEC-320 (F) Standard Sheet C-19 (Connector for
J5) 634-113800-002
10. 12 #6-32 x 1/2” Hex Screws 802-632090-001
11. 12 #6 Lock Washers 803-600100-001
12. 2 Waterproof O-ring gasket WR-75 for WG flange 820-075000-001
13. 1 RMR-K400A Redundancy Kit (see next table) 190-330600-020

ARMA-K100-CRM
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RMR-K400A Redundancy Kit (P/N 190-330600-020)
Item Quantity Description Part #
1. 1 W/G WR75 Switch Assembly 240-330600-A01
2. 2 Ground Cable 260-100014-001
3. 1 Serial Interface Bus Cable Assembly 260-310402-001
4. 1 Semi-rigid Cable Assembly Upper 260-130602-601
5. 1 Semi-rigid Cable Assembly Lower 260-130600-701
6. 1 Local Bus Cable Assembly (Redundancy Cable) 260-310803-001
7. 1 Ku-Band Splitter Assembly (for rack-mount) 290-530400-001
8. 1 Connector Plate 330-153639-001
9. 1 Support 330-153895-001
10. 1 Plate 330-153896-001
11. 2 Pin ¼-20 330-153897-001
12. 1 “A” Decal 780-000220-001
13. 1 “B” Decal 780-000230-001
14. 4 10-32 Hex Nut 18-8 Stainless Steel SS 801-103210-001
15. 2 ¼-20 Hex Nut 18-8 SS 801-140010-001
16. 4 8-32 Hex Nut 18-8 SS 801-832010-001
17. 2 6-32x5/16 Mach Screw Socket Cap 18-8 SS 802-632030-001
18. 8 6-32x5/8” Mach Screw Hex Socket Cap 18-8 SS 802-632030-011
19. 4 8-32x3/4” Mach Screw Phil Pan Head 18-8 SS 802-832010-003
20. 2 #10 Split Washer 18-8 SS 803-100100-001
21. 2 #10 Flat Washer 7/16 OD X.20 OD X.031 Thk 18-8 SS 803-100200-001
22. 2 ¼ Split Washer 18-8 SS High Collar 803-140100-002
23. 2 ¼ Flat Washer 18-8 SS 803-140200-001
24. 10 #6 Split Washer 18-8 SS 803-600100-001
25. 8 #6 Flat Washer Sml 0.312”Od 0.155”ID 0.035”Thk 18-
8 SS 803-600200-002
26. 4 Split Washer 18-8 SS 803-800100-001
27. 8 #8 Flat Washer 3/8”OD 0.170”ID 0.031”Thk 18-8 SS
Gould Fasteners 803-800200-001
28. 2 WR75 O-Ring Half Gasket 820-075000-001

ARMA-K100-CRM
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Figure 1: Product Outline (redundant system)
!
!

ARMA-K100-CRM
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Figure 2: Waveguide Connections (Top view & side view)

ARMA-K100-CRM
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Figure 3: Block Diagram (one unit)
SECONDARY
POWER
SUPPLY MONITOR
AND
CONTROL
J4
OUTPUT
MONITOR
J7
W/G
OUTPUT
GAIN
CONTROL
COOLING
FANS (REAR)
+12V,
-9V
DRIVER
OUTPUT WAVEGUIDE
ARM ASSEMBLY
J5
AC
LINE
VARIFAN
GND
- 15V
+ 15V
+ 5V
GND
J2
SERIAL
I/F
J3
DISCRETE
I/F
J6
REDUNDANT
I/F
CURRENT
SENSOR
40 dB
30 dB
20 dB
+ 12V
MAIN
POWER
SUPPLY
FRONT PANEL
KEY PAD
LED's
DISPLAY
CIRCUIT
BREAKER
+ 12V
VARIFAN
+ 12V (high current)
COOLING
FANS (FRONT)
+ 48V + 48V + 48V
+ 48V
TEMP
SENSOR
POWER CONDITIONER
BOARD ASSEMBLY
POWER MODULE
+12V,
-9V
+12V,
-9V
TEMP
SENSORS
POWER CONDITIONER
BOARD ASSEMBLY
LNA HPA
PM1
+12V,
-9V
TEMP.
COMPENS
- 9V
TH_F
TH_F
TH_R
L
G
N
FILTER ISOLATOR
OUTPUT
POWER
DETECTOR
REFLECTED
POWER
DETECTOR
+ 12V (high current)
ISOLATOR
COM
PMALARM
TEMP
MUTE
DTEMP
MUTE-D
DALARM
GAIN
RESET
DTEMP
MUTE-D
DALARM
GAIN
COM
SWT+12V
J1
RF
INPUT
J8
INPUT
MONITOR
10 dB
INPUT
COUPLER
- 9V
PM2
- 9V
+15 V
+ 15V
- 15V
+ 5V

ARMA-K100-CRM
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Figure 4: Redundant System Block Diagram
AMPLIFIER "A"
J1 J7
J2 J6
AMPLIFIER "B"
J1 J7
J2 J6
SPLITTER
RS-485
RF INPUT
(TYPE N, FEMALE)
RF
INPUT B
RF
INPUT A
RF OUT B
RF OUT A
TO
ANTENNA
COAXIAL
SWITCH
REDUNDANT
I/F B
W/G LOAD
REDUNDANT
I/F A
SERIAL
I/F A
SERIAL
I/F B
W/G
W/G
SERIAL I/F
CABLE REDUNDANT I/F
CABLE
TO PC
HIGH POWER
SSPA
HIGH POWER
SSPA
2
1
3
4

ARMA-K100-CRM
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2.4 SPECIFICATIONS
The SSPA specified herein is capable of meeting or exceeding the performance specifications
listed in the following table over frequency range, operating temperature and line voltage
variation unless otherwise specified. The SSPA will meet all RF performance specifications
within thirty minutes of application of prime power.
TABLE 1: ELECTRICAL SPECIFICATIONS (each unit)
Frequency Range 14.000 - 14.500 GHz
Power Output (P1dB) + 49 dBm, min
Gain @ rated power 60 dB, min
Gain Flatness (at room temperature) 2.0 dB p-p, max, over 500 MHz
0.6 dB, max, over 40 MHz
Gain Variation ± 0.50 dB, max (0°C to +25°C)
± 1.50 dB, max (0°C to +50°C)
Gain Stability over 24 hours ± 0.25 dB, max @ 25°C ambient
Variable output attenuation 18 dB, min
Accuracy of attenuation setting ± 1.0 dB, over frequency and temperature range
Input Return Loss (Power on) 18 dB, max
Output Return Loss (Power off) 20 dB, max
Noise Figure @ maximum gain 10 dB, max
Spurious at rated power - 65 dBc, max
Harmonics at rated power - 65 dBc, max
AM/PM Conversion at rated power 3°/dB, typ.
Third Order Intermodulation
(Two equal tones 5 MHz apart) - 33 dBc, max. @ 7 dB back-off total power - 25 dBc, max. @ 3 dB back-off total power
Group Delay Linear
Parabolic
Ripple
0.02 ns/MHz, max
0.003 ns/MHz2, max
1 ns p-p, typical
Residual AM
(F* = Frequency in kHz)
- 45 dBc
- 20 (1+ log F*) dBc
- 80 dBc
(0 - 10 kHz)
(10 kHz - 500 kHz)
(500 kHz - 1 MHz)
Phase Noise Meets IESS-308/309

ARMA-K100-CRM
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TABLE 2: MECHANICAL SPECIFICATIONS
Physical Dimensions See product outline in Figure 1 at page 12 & Figure 2 at page 13
Approximate Weight 50 lbs (23 kg) each unit
Mounting Requirements See product outline in Figure 1 at page 12 & Figure 2 at page 13
TABLE 3: POWER REQUIREMENTS
Power Requirements 90 – 264 V AC, 47-63 Hz, single phase
Power Consumption 10A typical @ 220V AC
Power Factor Correction 95% min.
TABLE 4: ENVIRONMENTAL CONDITIONS
Temperature:
Non operating (continuous exposure)
Operating (ambient)
- 40°C to + 85°C
0°C to + 50°C
Relative humidity 95 % non condensing
Altitude 10,000 feet AMSL, derated 2ºC/1,000 feet from
AMSL
TABLE 5: FRONT PANEL DISPLAY AND CONTROLS
Display Keypad
20 characters x 2 rows alphanumeric 6 keys: [Ï],[Ð],[Í],[Î],[Enter] &[Clear]

ARMA-K100-CRM
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TABLE 6: CONNECTORS
Conn. Function Description Mating Connector
(J1) RF Input N - Type (F) N - Type (M)
(J2) Serial Interface DE - 9S (F) DE - 9P (M)
(J3) Discrete Interface DB - 25S (F) DB - 25P (M)
(J4) RF Output Monitor N - Type (F) N - Type (M)
(J5) AC Line IEC - 320 (M)
standard sheets C-20
contact style 6.3 mm QD tabs
IEC - 320 (F)
standard sheets C-19
(connector is provided)
(J6) Redundant Interface DA - 15S (F) DA - 15P (M)
(J7) RF Output WR-75 (Flat) WR-75 (Grooved)
(J8) RF Input Monitor N - Type (F) N - Type (M)
TABLE 7: RS-485 INTERFACE
Baud rate 9600 (default factory setting)
Data Bits 7
Stop Bit 1
Parity EVEN
TABLE 8: SERIAL INTERFACE (J2) – PINS ASSIGNMENTS
Name Type Pin # Active condition
TX485_H Serial port (output) 6 Serial transmit port, RS-485 TX + levels.
TX485_L Serial port (output return) 4 Serial transmit port, RS-485 TX - levels.
RX485_H Serial port (input) 9 Serial receive port, RS-485 RX + levels.
RX485_L Serial port (input return) 3 Serial receive port, RS-485 RX - levels.
RS485_C Serial port (common) 5 System common.
RS485_G Serial port (ground) 1 Shield ground / safety ground

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TABLE 9: DISCRETE INTERFACE (J3) – PINS ASSIGNMENTS
Name Type Pin # Active condition
PWRON_S output (active closed) 1 Indicates controller power is on.
RFMUT_S output (active closed) 2 Indicates RF output is muted (i.e. off).
ALARM_S output
(active open) 3 Indicates operation with degraded performance. Caused by: base plate temperature > 70°C but < 80°C,
or internally detected alarms.
FAULT_S output
(active open) 4 Indicates major failure, operation is not possible. Amplifier drain voltages are automatically turned off.
Caused by: base plate temperature > 80°C,
drain voltage > 13V or < 9V,
drain current > maximum rated + 20%,
load VSWR > 3.0:1, or internally detected faults.
RFOUT_S output (active closed) 5 Indicates RF output power greater than 30 dBm.
REMOT_S output
(active closed) 6 Indicates system control is via the remote Computer I/F (CIF).
DISOU_C output (common) 7 System output common.
RFENA_A input (active closed) 8 Enables amplifier when connected to pin 15.
CIFRC_A input (active open) 9 Enables remote Computer I/F (CIF).
GAIUP_A input
(momentary closed) 10 To decrease attenuator setting, momentarily connect to pin 15.
GAIDW_A input
(momentary closed) 11 To increase attenuator setting, momentarily connect to pin 15.
AUTOS_A input
(active open) 12 * Enables automatic switch over to standby unit upon fault detection. Alternate position is manual mode for
servicing.
SWTWG_A input
(momentary closed) 13 * Waveguide switch toggle action to connect either unit A or unit B to antenna port.
DISIN_C input (common) 15 System input common.
SWTU1_S output
(active closed) 16 * Normally closed, Form - C contact, when unit A is connected to the antenna port.
SWTU2_S output (active open) 17 * Normally open, Form - C contact, when unit A is
connected to the antenna port, in manual mode.
SWTUS_R output (return) 18 * Form - C relay common.
STDBY_S output
(active closed) 19 * Handshake signal indicating that the unit is in a stand- by state. This implies that there are no faults or alarms
and that the unit is in auto mode.