Advantech ARMA-C250-CRM User manual

INSTALLATION AND OPERATING MANUAL
REDUNDANT 250 W C-BAND RACK-MOUNT
SOLID STATE POWER AMPLIFIER
ARMA - C250 – CRM
PM 101-615652-140 REV. 4

ARMA-C250-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-C250-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 FOR ONE UNIT............................................................................................................... 10
2.4 RMR-C400A REDUNDANCY KIT (P/N 190-310604-020)....................................................................... 11
2.5 SPECIFICATIONS.......................................................................................................................................16
3. INSTALLATION ............................................................................................................................................23
3.1 INSTALLATION CONSIDERATIONS......................................................................................................23
3.2 INSTALLATION PROCEDURE................................................................................................................. 23
4. OPERATION................................................................................................................................................... 25
4.1 INTRODUCTION........................................................................................................................................25
4.2 FRONT PANEL CONTROLS .....................................................................................................................25
4.2.1 Front Panel Menu System................................................................................................................... 26
4.3 REMOTE INTERFACE...............................................................................................................................28
4.3.1 Software Installation and Set-up......................................................................................................... 28
4.3.2 Using the RS-485 Serial Interface.......................................................................................................29
INITIAL MENU (SCREEN) PAGE....................................................................................................................30
MENU (SCREEN) PAGE #1 ............................................................................................................................. 31
MENU (SCREEN) PAGE #2 ............................................................................................................................. 33
MENU (SCREEN) PAGE #3 ............................................................................................................................. 34
4.4 DISCRETE INTERFACE ............................................................................................................................35
4.4.1 RF Enable ........................................................................................................................................... 35
5. CONFIGURATION AND SET-UP................................................................................................................ 36
5.1 SOFTWARE CONFIGURATION..............................................................................................................36
5.2 RF CONFIGURATION................................................................................................................................ 36
5.2.1 Safety Considerations..........................................................................................................................36
5.3 START-UP ......................................................................................................................................................37
5.4 SELECT LOCAL CONTROL MODE...................................................................................................................37
5.5 SETTING FAULT CONDITION FOR LOW OUTPUT POWER ................................................................................38
5.5.1 At the Front Panel:..............................................................................................................................38
5.5.2 Using the Serial Interface:..................................................................................................................38
5.6 GAIN ADJUSTMENT ....................................................................................................................................... 39
5.6.1 At the Front Panel:..............................................................................................................................39
5.6.2 Using the Serial Interface:..................................................................................................................39
5.7 POWERING UP THE AMPLIFIER ......................................................................................................................39
5.7.1 At the Front Panel:..............................................................................................................................39
5.7.2 Using the Serial Interface:..................................................................................................................40
5.8 STATUS DISPLAY SCREENS................................................................................................................... 40
5.9 AMPLIFIER SHUTDOWN .........................................................................................................................40
5.10 RF INPUT AND OUTPUT MONITOR PORTS..................................................................................... 41
5.10.1 Monitor Calibration Chart..................................................................................................................41

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6. ALARMS AND FAULTS ...............................................................................................................................42
6.1 THERMAL ALARMS AND FAULTS........................................................................................................ 42
6.2 RESETTING THE SSPA ............................................................................................................................. 42
6.2.1 Using the Serial Interface ...................................................................................................................42
6.2.2 At the Front Panel............................................................................................................................... 42
7. MAINTENANCE ............................................................................................................................................43
7.1 CLEANING..................................................................................................................................................43
7.2 PRECAUTIONS........................................................................................................................................... 43
7.2.1 Connection to Line Voltage.................................................................................................................43
7.2.2 RF Radiation Hazard.......................................................................................................................... 43
7.2.3 Non-user-serviceable Modules............................................................................................................ 43
7.3 FUSES AND CIRCUIT BREAKERS.......................................................................................................... 43
7.3.1 Fuses ................................................................................................................................................... 43
7.3.2 Circuit Breakers.................................................................................................................................. 43
7.4 MAIN FAULT DIAGNOSIS ....................................................................................................................... 44
7.5 POWER SYSTEM FAULT DIAGNOSIS ...................................................................................................44
7.6 SSPA FAULT DIAGNOSIS ........................................................................................................................45
7.7 TEMPERATURE FAULT DIAGNOSIS.....................................................................................................45
7.8 LOW OUTPUT POWER FAULT DIAGNOSIS ......................................................................................... 45
7.9 HIGH REFLECTED POWER FAULT DIAGNOSIS.................................................................................. 45
7.10 MODULE REPLACEMENT (EACH UNIT)..........................................................................................45
7.10.1 General Precautions for Modules Replacement..................................................................................46
7.10.2 Power Supplies Replacement.............................................................................................................. 47
7.10.3 Display Control Panel Replacement................................................................................................... 49
7.10.4 RF Module Replacement.................................................................................................................... 50
7.10.5 Monitor and Control Board Replacement.......................................................................................... 52
7.10.6 Fans Replacing ...................................................................................................................................53
8. APPENDIX A: SAFETY AND EMC COMPLIANCE................................................................................54

ARMA-C250-CRM
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FIGURES
FIGURE 1: PRODUCT OUTLINE (REDUNDANT SYSTEM) – FRONT AND REAR VIEWS ........................12
FIGURE 2: WAVEGUIDE CONNECTIONS (TOP VIEW & SIDE VIEW)..................................................13
FIGURE 3: BLOCK DIAGRAM (EACH UNIT).....................................................................................14
FIGURE 4: REDUNDANT SYSTEM BLOCK DIAGRAM.......................................................................15
FIGURE 5: BACK PANEL CONNECTORS..........................................................................................22
FIGURE 6: FRONT PANEL COMMANDS HIERARCHY.......................................................................27
FIGURE 7: INITIAL PAGE OF THE COMMUNICATION PROGRAM......................................................30
FIGURE 8: PAGE #1 OF THE COMMUNICATION PROGRAM..............................................................31
FIGURE 9: PAGE #2 OF THE COMMUNICATION PROGRAM..............................................................33
FIGURE 10: PAGE #3 OF THE COMMUNICATION PROGRAM............................................................34
FIGURE 11: DISCRETE INTERFACE – PROPOSED MONITOR AND CONTROL CIRCUIT ......................35
FIGURE 12: PRODUCT OUTLINE (SINGLE UNIT)..............................................................................55
FIGURE 13: 3-D VIEW OF THE REDUNDANT SYSTEM (IN RACK CABINET)......................................56
FIGURE 14: ENLARGED 3-D VIEW OF THE REDUNDANT SYSTEM (IN RACK CABINET)...................57

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TABLES
TABLE 1: ELECTRICAL SPECIFICATIONS (EACH UNIT)..................................................16
TABLE 2: MECHANICAL SPECIFICATIONS (EACH UNIT)................................................17
TABLE 3: POWER REQUIREMENTS (EACH UNIT).............................................................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 RS-485 INTERFACE (J2) – PIN ASSIGNMENTS ...................................18
TABLE 9: DISCRETE INTERFACE (J3) – PIN ASSIGNMENTS ...........................................19
TABLE 10: REDUNDANT INTERFACE (J6) – PIN ASSIGNMENTS....................................21
TABLE 11: STATUS INDICATORS..........................................................................................22
TABLE 12: REDUNDANT INDICATORS................................................................................22
TABLE 13: SERIAL RS-485 INTERFACE CONNECTION INFORMATION........................28

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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-C250-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 265V AC) is dangerous because prime power potentials have been
known to cause death or injury.
----------------------------------------------- WARNING ----------------------------------------------------
This equipment can not be repaired by the operator. 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-C250-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 milliWatt vs 20 to 500 Watt 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.
----------------------------------------------- CAUTION-----------------------------------------------------
THESE ARE HEAVY UNITS. USE TWO OR MORE PEOPLE TO LIFT AND MOVE
this equipment or use an equipment cart. There is a risk of back injury, if this equipment is lifted
by one person.

ARMA-C250-CRM
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2. GENERAL INFORMATION
2.1 INTRODUCTION
This manual contains information required to install and operate the Redundant 250 W, C-Band
Rack-mount Solid State Power Amplifier Model # ARMA-C250-CRM, in a 1:1 redundant
configuration.
2.2 DESCRIPTION
The ARMA-C250-CRM includes two 250 W solid state power amplifiers (SSPA) and a
waveguide switching unit for 1:1 redundant operation. Each SSPA incorporates a DC main
power supply and a forced air cooling system. Each SSPA features an RS-485 interface that
provides full remote monitor and control of selected functions. A product outline drawing of a
redundant system is shown in Figure 1 at page 12 & Figure 2at page 13. The functional block
diagram of a single solid state power amplifier is shown in Figure 3 at page 14 and a functional
block diagram of the redundant system is shown in Figure 4 at page 15.
2.2.1 POWER SUPPLY
The main power supply provides a DC high current output to the HPA (High Power Amplifier),
a low current output to the secondary power supply and to two filtered, low current supplies for
operation of the four 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 220V 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-C250-CRM
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2.3 PACKING LIST FOR ONE UNIT
Item Quantity Description Part #
1. 1Installation and Operating Manual PM 101-615652-140 Rev. 4
2. 1C-band, 250 W amplifier,
model ARMA-C250-CRM 100-615652-140
3. 1Converter RS485 to RS232,
Keyboard Powered (optional) 510-000485-001
4. 1Serial Communications Software
(on 3½” diskette) 380-100796-001, Rev. 1.40
5. 1IEC-320 (F) standard sheet C-19
(Connector for J5) 634-113800-002
6. 1Water proof gasket for WG flange 705-137000-001
7. 10 #10-32 x 1/2” hex screws 802-103290-001
8. 18 #10 lock washers 803-100100-001
9. 1DB - 25P (M) (Connector for J3) 631-871380-001
10. 1Back - shell cover for item #9 631-000250-001
11. 1DE - 9P (M) (Connector for J2) 631-871380-003
12. 1Back - shell cover for item #11 631-925380-001
13. 1Connector 15 crimp snap-in
(Connector for J6) 631-205206-001
14. 1Slide Non-Pivoting with Mounting Kit 815-230124-001
15. 2Wrap-Around Bracket for All Open
Slot S-230 Slide 815-307200-001
16. 8#10-32 x 1/2” machined screws PHIL
pan head 18-8 SS 802-103210-001
17. 10 #10 flat washer 7/16 18-8 SS 803-100200-001

ARMA-C250-CRM
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2.4 RMR-C400A REDUNDANCY KIT (P/N 190-310604-020)
Item Quantity Description Part #
1. 1W/G Switches Assembly 240-310600-501
2. 2Ground Cable 260-100014-001
3. 1Serial Interface Cable Assembly 260-310402-001
4. 1Semi-rigid Cable Assembly Upper 260-310602-601
5. 1Semi-rigid Cable Assembly Lower 260-310602-701
6. 1Local Bus Cable Assembly 260-310803-001
7. 1C-Band Splitter Assembly (for rack-mount) 290-510400-001
8. 1Support 330-152825-004
9. 1Plate 330-153418-001
10. 2Pin ¼ 20 330-153419-001
11. 1Connector Plate 330-153639-001
12. 2WR137 Water proof gasket for WG flange 705-137000-001
13. 1“A” Decal 780-000220-001
14. 1“B” Decal 780-000230-001
15. 410-32 Hex Nut 18-8 SS 801-103210-001
16. 2¼ 20 Hex Nut 18-8 SS 801-142010-001
17. 48-32 Hex Nut 18-8 SS 801-832010-001
18. 16 #10-32 x 1/2” Mach Screw Hex Head 18-8 SS 802-103290-001
19. 26-32 x 5/16” Mach Screw Socket Cap 18-8 SS 802-632030-001
20. 48-32X5/8” Mach Screw Phil Pan Head 18-8 SS 802-832010-005
21. 18 #10 lock washer 803-100100-001
22. 4#10 flat washer 803-100200-001
23. 2¼ split washer 803-140100-001
24. 2¼ flat washer 803-140200-001
25. 2#6 Split Washer 18-8 SS 803-600100-001
26. 4#8 split washer 803-800100-001
27. 8#8 flat washer 803-800200-001

ARMA-C250-CRM
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Figure 1: Product Outline (redundant system) – front and rear views

ARMA-C250-CRM
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Figure 2: Waveguide Connections (top view & side view)

ARMA-C250-CRM
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Figure 3: Block Diagram (each unit)
ISOLATOR
J1
RF
INPUT
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
+ 12V
- 9V
- 15V
+ 15V
+ 5V
GND
J2
SERIAL
I/F
J3
DISCRETE
I/F
J6
REDUNDANT
I/F
CURRENT
SENSOR
PMALARM
TEMP
MUTE
40 dB
30 dB
20 dB
10 dB
+ 12V
MAIN
POWER
SUPPLY
SECONDARY
POWER
SUPPLY
FRONT PANEL
KEY PAD
LED's
DISPLAY
CIRCUIT
BREAKER
J8
RF INPUT
SAMPLE
PM1
PM2
+ 12V
VARIFAN
+ 15V
+ 12V (high current)
COOLING
FANS (FRONT)
+ 48V
+ 48V
+ 48V
+ 48V
TEMP
SENSOR
PM2
POWER CONDITIONER
BOARD ASSEMBLY
POWER MODULE
+12V,
-9V
+12V,
-9V
TEMP
SENSORS
POWER CONDITIONER
BOARD ASSEMBLY
LNA HPA
PM1
PM2
+12V,
-9V
TEMP.
COMPENS
- 9V
TH_F
TH_F
TH_R
L
G
N
FILTER ISOLATOR
COM
COM
DALARM
MUTE-D
DTEMP
GAIN
RESET
GAIN
RESET
DTEMP
MUTE-D
DALARM
OUTPUT
POWER
DETECTOR REFLECTED
POWER
DETECTOR
+ 12V (high current)

ARMA-C250-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

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2.5 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 5.850 - 6.450 GHz
Power Output (P1dB) + 53 dBm, min
Gain @ rated power 62 dB, min
Gain Flatness 2.0 dB p-p, max over 600 MHz (at room temperature)
0.6 dB, max over 40 MHz
Gain Variation ± 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 8 dB, max
Spurious at rated power - 65 dBc, max
Harmonics at rated power - 90 dBc, max
AM/PM Conversion at rated power 2.5 °/dB, typ.
Third Order Intermodulation
(Two equal tones 5 MHz apart) - 36 dBc max. @ 7 dB back-off total power - 26 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-C250-CRM
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TABLE 2: MECHANICAL SPECIFICATIONS (EACH UNIT)
Physical Dimensions See Figure 1 at page 12 &Figure 2 at page 13
Approximate Weight 100 lb (46 kg)
Mounting Requirements See Figure 1 at page 12 &Figure 2 at page 13
TABLE 3: POWER REQUIREMENTS (EACH UNIT)
Power Requirements 220V AC, 47-63 Hz, single phase
Power Consumption 13A typical @ 220V AC
Power Factor Correction 95% min.
TABLE 4: ENVIRONMENTAL CONDITIONS
Temperature:
Non operating (continuos 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: [

],[

],[

],[

],[Enter] &[Clear]

ARMA-C250-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 CPR - 137 (Grooved) CPR -1 37 (Flat)
(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 RS-485 INTERFACE (J2) – PIN 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) – PIN 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 > 2.0:1, 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.