Ancillary Radar Equipment (IFF, PPI’s, RHI’s, Radar Simulators etc)

PPI Indicators to be identified

GPA-122 IFF/SIF Decoder
The Coder-Decoder is an advanced microelectronic Identification, Friend or Foe CIFF) subsystem that increases the usefulness of conventional Mark X IFF systems and improves the operational effectiveness
of Aircraft Control and Warning (ACP') controllers by providing identification and altitude information on friendly aircraft through the use of Selective Identification Feature (SIF). SIF enhances the basic IFF with the assignment of individual coded replies in each mode to identify various aircraft and missions. Coder group consists of the DK-614, ( )/ GPA-122. Decoder consists of KY-615 ( )/GPA-122. The structure of the
pulse group used for interrogation and reply provides individualized information pertaining to the responding aircraft. The system provides for automatic pressure-altitude information, transmission in 100 foot increments, from -1000 to 126,700 feet. The Coder/Decoder provides the binary pulse coding and utilizes the multiple-pulse reply codes which are available in the following modes:
Mode 1, Security Identification (SI), 32 codes
Mode 2, Personal Identification (PI), 4096 codes
Mode 3/A (Mode 3), Target/Traffic Identification (TI), 4096 codes
Mode C, Pressure Altitude data, 1278 codes
Capability: Provides the PPI operator with a visual coded numeric indication for an unknown Mode 1, 2,
3A or C reply. Acquisition of the unknown target is made by use of a range azimuth gate or a photo-electric pickup. device (light pencil). The readout consists of three five-digit channels which are electroluminescent panels with 0.5 inch characters that can be viewed from a 180° angle.
Weight: 48 pounds
Manufacturer: Litton Industries

GPA-125 - Coder-Decoder Group
The Coder-Decoder Group is designed for integration with an existing (SIF) system to provide Mode 4 capabilities at the radar site. Push button switches on the master and operator's control boxes enable the
operator to remotely control the time and duration of the Mode 4 interrogations.
Capability: The Coder-Decoder Group generates randomly comprised Mode 4 interrogations, decodes and processes the reply from the target aircraft, indicates system fault and low randomness alarm conditions, provides auxiliary signals required for proper interfacing and operation with associated equipment, and routes and interfaces input signals from associated equipment as required by the site mission. Front panel controls permit the operator to initiate and terminate Mode 4 interrogations, to select the type of video (SIF or Mode 4) to be displayed on associated PPI's, to select internal or external synchronization, to operate with either MTI or non-MTI radars, and to operate under certain emergency conditions.
Weight: 144 pounds
Manufacturer: Hazeltine

GPA-126 Plan Position Indicator
The CPA 126 is a Plan Position Indicator primarily designed for use with the AN/MPS-11 Radar set. The indicator receives target video information in the form of triggers or pulses and displays a visual representation of the radar echoes. It has various positions for other information such as, IFF/SIF, range marks, angle marks and video mapping presentations.
a. Range Coverage 50-220 miles in 1 ranges 0-50, 0 - 100, 0 - 220
b. Azimuth Coverage - 360 degrees or any sector.
c. Off center operation variable from 50- 150 miles.
d. Provisions for use of IFF and Video Mapping Equipment.
e. Delayed sweep variable between 1 and 24o miles.
Display: 12" CRT
Range: 0-50, 0-100, 0-200 mi.
Range marks: 10 and 50 mi intervals.
Power input: 120/208V 60cy AC.
Weight: 418 pounds
Manufacturer: General Electric

GPA-127 Plan Position Indicator

GPA-131 Video Mapper
Notes: Generates and supplies five different air space maps to radar PPI’s.

GPA-30 Video Mapper
Notes: Used in conjunction with ground based radar sets to provide these sets with an electronic map of the region being scanned by the radar antenna. The equipment generates a map from opaque film negative of the territory surrounding the radar site. The maps used are circular with the radar site at the center; the range of the map is 10 to 350 nautical miles. On the longest range, the equipment will resolve map lines 0.0025 inches wide and spaced 0.0075 inches apart. This map is presented to the PPI of the associated radar. It is superimposed over the video signals from acquired targets, permitting the operators to locate the position of a radar target with respect to a point on the earth's surface. The AN/GPA-30 is capable of supplying video mapping signals to a maximum of 12 plan position indicators. Map making and photographic facilities for drafting and processing of maps are not included with this equipment.
Capability: Accepts trigger and servo data from a single search radar for proper range and azimuth
orientation of a single map.
Weight: 515 pounds
Manufacturer: Televiso Corporation (TM 11-487C-1)

GPS-T2A Radar Signal Simulator
The AN/GPS-T2A is a training device which is used to simulate radar targets on ground radar equipment. It will supply simulated surveillance and height information as necessary to produce a realistic presentation on search radar indicators. The simulator will operate in synchronism with the station radar antenna or when the antenna is not used, the simulator will supply the rotational information to the station radar indicators. It has an electronic countermeasure (ECM) attachment which allows the simulator to produce composite target, permanent-echo and jamming signals.
Capability: After being detected, amplified, and fed to radar indicators, the composite signal presents the
problem on the radar PPI in the form of programmed targets in an environment of jamming noise and
permanent echo.
Weight: 960 pounds
Manufacturer: Radio Corporation of America
Notes: 70mm Tape

GPS-T4 Radar Simulator
The AN/GPS-T4 is used to train personnel in the use of ground control intercept radar. The equipment enables radar operators to gain practice in the use of radar by simulating targets that appear and act like the actual intercept aircraft displayed during a tactical operation. The radar remains in normal operation while used with the simulator and can pick up real targets while a training problem is in progress. The PPI operator receives radar indications and makes observations and comments similar to those required in an actual intercept situation. His comments concerning target identification and intercept procedures are transmitted in the usual way to the "Pilots" (console operators) who then "Fly the intercepting aircraft" (set the required flight characteristics into the SM-204).
Capability: Each SM-204 is capable of simulating airspeeds up to Mach 2.5 that vary proportionately with
altitude. Climb and descent rates up to 30,000 feet per minute are possible, with a maximum ceiling of 60,000 feet. Targets may be made to accelerate up to Mach 0.5 per minute, and to consume fuel at the rate of 150,000 pounds per hour. Turn rates can be as tight as 7.5 degrees per second, and winds can be introduced from any direction with speeds up to 200 knots. These are the maximum limits of the target generator; the actual limits of any one target are set by the aircraft characteristics module for that particular type of aircraft.
Weight: 3859 pounds
Manufacturer: The Marquardt Corporation
Notes: 12 targets

GPX-18B IFF/SIF Decoder
The 0A-1272/GPX-18B Coder-Decoder groups generate paired pulse coded interrogations for modulation and transmission by the radar recognition set (AN/UPX-6). When these interrogations are received by an airborne transponder set, a coded reply (code train) is transmitted from the transponder, and received and detected by the receiver portion of the radar recognition set. Thereafter, the code train is sent to the coder-decoder group and compared for correctness with the mode and code requirements. Correct signal replies are then displayed on the radar set Plan Position Indicator (PPI) as target SIF (Selective Identification Features) responses. The 0A-1272/GPS-18B in conjunction with the AN/UPX-6 is used with the AN/MPS-11 and AN/TPS-48 radar systems.
Capability: Single channel during generation of pulse pairs to UPX-6. Received video is routed to six channels for decoding.
Notes: Used for identification of friendly targets of Radar Set AN/MPS-11. Transmits coded r.f. pulses for triggering of transponders of Transponder Set AN/APX-25 carried by friendly aircraft to be identified. Receives the transponder replies and after decoding furnishes them to the associated radar indicator in the form of video pulses. Its narrow beam width interrogations is synchronized with that of the radar in azimuth and time thus permitting the reply pulses to be displayed on the associated radar PPI in close association to the radar targets being identified. Also provision is made for symbolic display of the mode 2 response codes from Transponder Set AN/APX-25. Manufacturer: Radio Receptor, Brooklyn, N. Y. C. (TM 11-487C-1)
Weight: 264 pounds
Manufacturer: Bell Corp.

OA-99 Plan Position Indicator

PPN-18A - Transponder Set
The AN/PPN-18A Transponder set is a portable, watertight radar transponder designed for use as a positive troop location and identification device during forward air control (FAC) operations. When triggered by a radar pulse, the transponder transmits a coded RF response pulse. Operation is automatic once the operator turns the unit on and selects one of six codes to be used in the response pulse.
The transponder has external operating controls and indicators. The battery power source can be replaced without opening the transponder case assembly.
Capability: The AN/PPN-18A is a J-Band beacon used for offset bombing primarily with the F-111. Maximum range is approximately 50 miles.
Frequency Range: 16.25 to 17.0 GHz
Weight: 11 pounds
Manufacturer: Motorola Government Electronics Div. Scottsdale, AZ

TLQ-32 ARM Decoy Set
Description: A ground-based system that produces a decoy signal to protect battlefield radar from anti-radiation missiles.
Technical Data:
Emitter unit: 7 x 3 x 3 ft
Unit weight: 112 lb
Frequency: 2.9 to 3.1 GHz    
Power: 680 W (nominal)        
Coverage: 360º           
Setup/teardown: < 15 min     
Lift/carry: 2 persons per module        
Modules per system: 3 + power source                      
Power requirement: 2.5 kW (GFE generator)
Units: Central control unit (CCU)     
            Emitters (3)    
            Redundant fiber-optic links   
Description: The TLQ-32(V) consists of a transmitter assembly, modulator assembly, control/monitor, and antenna.  The units are integrated on a pallet, with the antenna extending above the center (transmitter) module.  They are interconnected by fiber-optic cable to a control unit in the radar operations shelter and protected with Kevlar. The system was designed for either fully automatic or manual operation.  There is an extensive built-in test capability for ease of maintenance, and the modularity makes rapid setup and teardown possible.

The radar operator controls the system with the Central Control Unit (CCU) in the TPS-75(V) operations shelter.  Three independent emitters each include a synthesizer, modulator, RF amplifiers, and control circuits; all are shock-mounted inside polypropylene transit cases that snap together to configure the emitter.  The antenna at the site is installed with a quick-disconnect clamp, while a redundant fiber-optic link consists of two fibers in a loop with the data flow going in opposite directions.  Optical transmitters are located at the CCU and each emitter. 

The TLQ-32(V) was designed to produce a decoying signal that emulates the sidelobe radiation pattern of the TPS-75(V) tactical radar.  The CCU accepts radar triggers and frequency code information, which are converted into command messages and sent via fiber-optic link to the emitters.  The command messages consist of a timing signal and a frequency code, and an indicator for selecting which emitter to radiate.  They are sent to the emitters, and the emissions are set up.  This involves tuning the emitter to the approximate frequency of the next radar pulse and initiating the pulse timing.  The decoy pulse is internally modulated to a 13-bit Barker code.

Three transmit units are located some distance from the radar, and either mask the sidelobe signals so that an attacking ARM’s seeker cannot locate the radar, or deceive incoming anti-radiation missiles into exploding harmlessly away from the radar’s antenna without destroying the decoy emitter.

The design facilitates the rapid replacement of faulty modules.  The emitters are form-fit-function identical, and a line-replaceable unit or complete case can be replaced without the need for adjustment or alignment.  It has an extensive built-in test capability.

Although the initial systems are limited to use with the TPS-75(V) because the modulator is hardwired to simulate the associated radar’s antenna pattern, the system can be changed to emulate other systems.  The hardwiring could be changed, or a software adaptation of the output signal could be developed.  This would make it easier to adapt the TLQ-32(V) ARM Decoy to other radars.

Operational Characteristics.  Anti-radiation missiles use aircraft sensors to locate radar sites that pose a threat to an attack.  After launch, the missile’s onboard sensors home in on the radar by sensing the characteristic pattern of the antenna sidelobes.  The missile then explodes close to the antenna in an attempt to put the radar out of commission.
The ARM Decoy’s function is to mislead the missile seeker enough to make it impact or detonate harmlessly away from the main radar antenna.  One anti-missile technique involves shutting off the radar transmitter, depriving the ARM of a signal to home in on.  However, this puts the radar temporarily out of service during an attack - the goal of the attacker anyhow. 

The TLQ-32(V) emitters are located away from the radar to be protected.  With the three units set up in a configuration specifically tailored to provide incoming anti-radiation missiles with a more attractive target than the original radar antenna, the system masks the true sidelobes by specifically emulating the sidelobe pattern of the radar, the pattern on which the missile homes.  Designers call the area in which the missile impacts the “ARM pit.” Distances and deployment schemes are classified.  Minor adjustments in the field can match the decoy to its particular radar.
          1970s   ARM capability demonstrated in combat in the Middle East (Arab-Israeli and Iran-Iraq conflicts)
          FY86   Initial concept development
Nov 1989     Solicitation released
Apr 1990     Solicitation completed
July 1990    Contract for pre-production units
Feb  1992     First article testing at China Lake Test Center
Mar  1993    Production approval/contract (14 systems)
Nov  1993    Solicitation announcement for additional 19 systems
Aug  1994    Solicitation announcement for additional two systems
          1994    Delivery of first production lot completed
May 1995    Estimated completion of Lot 1 deliveries
          1996    Deliveries continue
          2004   Production ends
Manufacturer: ITt Gilfillan
Notes: Lightweight, ruggedized, tunable decoy system that imitates the AN/TPS-43E and AN/TPS-75 radars; Delivered to the USAF in 1993.

TM-1B Radar Simulator
Manufacturer: Burroughs {sp} of Santa Monica

TPB-1B Ground Directed Bombing System

TPB-1C Ground Directed Bombing System

UPA-35 Indicator Group
10 to 250 mi, variable manually
Operating Voltages and Power Requirements: 115 vac, 55 to 65 cps, 1-ph, 1.82 kva
Type of Presentation: Video (12-in. CRT) and mechanical indicators
Pulse Repetition Rate: 200 to 600 pps (determined by prr of associated radar)
Trigger Input: 5 to 50v
Trigger Pulse Width: 0.5 to 6.5 µsec
Video Input: 1 to 2.5v, video, IFF and beacon
Mapping Antenna and Trace Speed: 0 to 20 rpm (can be sector scanned)
Video Off-Centering: 0 to 250rmi in any azimuth
Delayed Sweep: 4 to 200 mi
Input and Output Impedances: 68 ohms
Direction Finder Input: Synchro data from DF system
Direction Finder Gate: 2, .05v, 250 to 15,000 msec
Azimuth Accuracy: Total error between sweep input synchros and cursor output synchros does not exceed t deg at antenna speeds of 0 to 10 rps; -1.5 deg at antenna speeds of 10 to 15 rps using a 1- and 36-speed servo system. Indicator operates satisfactorily with 1-speed Synchro input data.
Range Strobe Output: 10 t3v; 2 t1; sec {unreadable}
Azimuth Output: 1- and 36-speed synchro data output determined by position of electronic cursor for control of height-finder antenna. Manufacturer: Hazeltine Electronics Corp., Little Neck, N. Y.
Notes: A universal plan position indicator. The indicator provides a visual display of azimuth, range, and height data (both absolute and relative) of targets detected by search and height-finding radar sets. The indicator may be used to display continuous signals from a radar direction finding set. It may be used also to display range and azimuth between any two targets within a range of 10 to 250naut mi. Ease of operation of the AN/UPA-35 is aided by the ability of the indicator to retain information. Where more than one AN/UPA-35 is used with one height finding radar antenna, indicators may control the single antenna at preset intervals. Radar information displayed by the
AN/UPA-35 permits control and direction of military aircraft from a ground station. (TM 11-487C-1)

UPA-48 Indicator Group
The AN/UPA- 4 8 is a console type plan position indicator (PPI) designed for use with a search radar system. The PPI receives target video information, sweep starting information in the form of triggers, synchro signals, and ancillary inputs such as range marks and IFF/SIF video targets. Using these inputs, the indicator drawer produces a PPI display with the following features: Display off-centering, delayed sweep, variable range control, cursor off-centering, and counter readout of target range strobe, and height and cursor azimuth. The AN/UPA-48 is compatible with any 400 Cps radar system, e.g., AN/TPS-44, AN/TPS-43, and AN/MPS-11 when converted.
Power Requirements:
Type: 120v plus or minus 10%, 2-wire single ph, 400 cps plus or minus 35 cps
Voltage Tolerance: 2.5v (max fluctuation)
Power Consumption: 800 w
Crest Factor: 1.4 plus or minus 10%
Form Factor: 1.11 plus or minus 5%
Transient Voltage Limits: Plus or minus 30 pct for 3 seconds duration. Equipment may stop operating but will re-stabilize after proper voltage is reapplied.
Functional Characteristics:
Range Coverage: Variable from 25 to 375 mi
Azimuth Coverage: 360 deg or any sector.
Range Accuracy: Plus or minus 1 pct or 0.5 mi, whichever is the greatest.
Azimuth Accuracy: Plus or minus 0.5 deg
Off-Centering Control: Continuously variable up to 250 mi in any direction.
Displaced Cursor Control: The cursor origin can be located at any position on the display.
Range Strobe Control: The range strobe can be located at any position on the cursor.
Height Finder Cursor Control: For height finding information, the cursor origin can be preset to any location within a ten mile radius.
Delayed Sweep Control: The sweep origin can be delayed any amount between O and 350 miles.
Signal Characteristics:
Sweep Trigger Inputs
Amplitude: 5 to 75v peak (across 75 ohms).
Pulse Width: 0.5 to 10 µsec
Polarity: Positive.
Pulse Repetition Frequency (PRF): 150 to 1000 pps with up to 10 pct jitter.
Video Signal Inputs
Amplitude: 1 to 2.5v peak (across 75 ohms).
Pulse Width: Between 0.5 and 15,000 µsec
Polarity: Positive.
Azimuth Signal Inputs: 1 speed and 36 speed 400 cps, synchro data at antenna.
Range Pulse Output for Height Computation
Amplitude: 10 plus or minus 3v peak (across 75 ohms).
Pulse Width: 2 plus or minus 1 µsec
Polarity: Positive.
Pulse Repetition Frequency (PRF): 150 to 600 pps
Azimuth Information for Height Computation Gating: 1 speed and 36 speed, 400 cps synchro data for the cursor bearing. Manufacturer: Westinghouse Electric Corporation (TM 11-487C-1)
Weight: 375 pounds
Manufacturer: Westinghouse Electric Corp., National Corp.
Notes: A console type plan-position indicator designed for use with search or height finder radar systems. Provides visual presentation of range, azimuth and height. Special features: transistorized, portable, ruggedized, off-center scanning, accepts 8 radar video inputs, 1 special input combines 2 videos, 6 digital inputs to mix digital data into video data, delayed sweep capability, adaptable, by motor, servo synchro power supply replacement to any power source, may be used in a variety of radar systems applications.

UPA-59 IFF Decoder
Mode Interrogation Mode: 1, 2, 3, 4 and C
Interlace Operation: Multimode 1, 2, 3, 4, C (individually selectable in any combination)
Passive Decoding
Basic: 3 channels: Modes 1, 2 and 3/A; X-pulse decoding; External outputs for expansion to any number of channels; Range adjustment for early decode
Option: 5 channels any mode or code
Active Readout Capability: 1 target -4 modes, 2 targets -2 modes, 3 or 4 targets -1 mode
PPI Active Readout Gating: PPI range-azimuth gate; PPI X-Y gate; Light pen
Selected Altitude Layer (SAL): Aircraft within SAL displayed, upper and lower limits selectable from 0 to 99,000 feet in 1000-foot increments
Degarble Feature: Links to select for bracket and passive decoding; always provided for active decoding
Radar Video Mix: Selectable radar/IFF mixing with duty cycles to 60%
Tag Video: Tag trigger decoding on Modes 1, 2, 3, 4, and C, and reset decoding
Mode 4 Capability: Mode 4 interrogation control; Video amplification and mode gating to provide video outputs for external processing
Raw Video (Code) Display Delay: 0 us, 20.3 us, 40.6 us, 60.9 us (selectable internally)
Emergency Alarms: 4X military emergency; 7700 civil emergency; 7600 communications failure; Tone, flashing warning lights, and PPI display, mute/reset; Selectable threshold; Short range inhibit
I/P Decoding: Provides double slash display for decoded l/P replies
Input Video: Operates with separated mode video, composite video (all modes with tags) or tag video (all modes plus separate tag input)
Self-Test Capability: Front panel selected; any code, any mode; Emergency 4X, 77, 76; Active readout display and PPI display for all decoded test signals
Power Requirements: 115 VAC, 47-400 Hz, 70 watts
Manufacturer: Hazeltine, Target

UPA-62 Plan Position Indicator
Display: 16" CRT
Range: 20, 40, 80, 160 and 320 miles with 2:1 expansion.
Power: 120V, 50, 60 or 400 Hz
Notes: Unit has height finder, cursor and range strobe and offset sweep to 320 nm. Can accept synchro, digital or 12-13 bit ACP and north mark data up to 60 RPM
Manufacturer: Westinghouse Electric Corporation

UPX-6 Radar Recognition Set
The AN/URX-6 is a receiver transmitter designed to operate with other IFF (Identification Friend or Foe) or SIF (Selective Identification Features) equipment as part of an aircraft identification system for an associated radar set. The Primary function of the equipment is to transmit and receive coded signals between radar identification equipment and target aircraft within the range of the IFF/ SIF system. The receiver and transmitter are tuned by changing operating crystals and by manual screwdriver adjustments adjacent to these crystals. The transmitter is factory aligned for 1020 MHz operation,
although its overall tuning range is 990 MHz to 1040 Hz. The receiver is similarly factory aligned (at 1100 MHz), and may be tuned for any frequency between 1080 MHz and 1130 MHz. The AN/UPX-6 is compatible with the following Coder-Decoder Groups: OA-1266, OA-1267, OA-1268, OA-1269, OA-1271, OP-1272, 0A-2397, OA-2605, AN/GPA-78 or AN/SPA-64.
Capability: 6 has one tunable channel each for transmission and reception of coded signals in the IFF/SIF system.
Transmitter - 990-1040 mc
Receiver - 1080-1130 mc
Power Output: 1.5 kW Peak
Operating Voltages and Power Requirements: 105, 117 or 125v ac, 60 or 100 cps, single ph, 250 w
Type of Presentation: PPI and B indicators of associated radar set
Pulse Width: 1 µsecond
Pulse Repetition Rate: 180 to 120 pps (adjusted to conform with pulse repetition rate of associated radar)
Receiver Bandwidth:
Broad - 8 to 11 mc - 60 db
Narrow - 5 mc - 70 db
Receiver Input Impedance: 50 ohms
Receiver Output Impedance: 72 ohms
Frequency (IF): 60 mc
Weight: 77 pounds
Manufacturer: Radio Receptor, Inc. (TM 11-487C-1)

UPX-23 Radar Recognition Set
Interrogator set AN/UPX-23 is a lightweight transportable Radar Recognition Set, intended primarily for use in connection with one or more Decoder Groups, Radar Indicators and Radar Sets. The Interrogator Set is packaged in a single, compact, drip-proof case.
Capability: The Interrogator Set when operated in connection with a suitable Radar Set, Decoder Groups, Radar Indicators and Mark XII IFF/SIF type Radar Identification Sets (Transponders), receiving the RF replies from them and processing the replies into proper video signals to be applied to the decoders and indicators. The set generates interrogation pulse pairs for Modes 1, 2, 3/A and C whenever the operator initiates a challenge in these modes. Equipment is capable of transmitting auxiliary Mode 4 interrogations, if modulation for coded pulse trains is supplied by a properly synchronized external equipment. The interrogator set will interlace challenges on different modes and separate the replies,
routing each reply to the proper decoder.
Mode Interrogation: Modes 1, 2, 3/A, 4, C
                            Modes B and D optional
Mode Interlace: Sequence: A: 1, 2, 3/A, C 1, 2, 3/A, C…etc.
                           Sequence: B: 1, 4, 2, 4, 3/A, 4, C, 4…etc.
                           Sequence: C: Mode 4 continuous
                           Sequence D:  Program Card
Coding: Internal: P1, P2 and P3 Pulses
              External: optional
Transmitter: Frequency 1030 (±0.20) MHz
                     Min Peak RF Power – 2000 watts at duty cycles up to 1.0%
Receiver: Center Frequency 1090 (±0.5) MHz
                3dB bandwidth of 8.0 MHz
                Receiver Gain: 112 dB
                Switch selectable long and short gain time control gate
                CW and MCW Anti-jamming circuits
Video Outputs: Two separated video outputs per mode
                          Two composite video outputs
Mode 4 Capability: Video amplification and mode gating to provide display video outputs
                                 Provisions for external processing
                                 Three pulse decoding
ISLS Trigger: Interrogation side lobe suppression pulse of 20 to 70 volts amplitude or optional ISLS switch driver
Dimensions: 10.7 H x 16.1 W x 18.0 D
Weight: 57 pounds
Power: 85 – 125 watts (depending on transmitted duty cycle, excluding 63 watts available  for remote power, total 200 watts for full duty cycle and remote control)
Voltage: 115 (± 10%) volts at 60 to 400 Hz
               115/220 volts at 50 to 400 Hz optional
Manufacturer: Cardion, Zenith.
Power: 1.5KW
Repetition rate: 3000 PPS max.

UPX-25 Radar Recognition Set
Manufacturer: Cardion Electronics, Target,

UPX-27 Radar Recognition Set
Manufacturer: Cardion Electronics, Target,

UPX-37 Digital Interrogator
Manufacturer: BAE Systems, Litton(?)
Notes: Replacement for the UPX-27; has self test and diagnostic menus

UYQ-27(V)6 Plan Position Indicator
Notes: Use in the TPS-75; all digital, and has track ball instead of the push-pull and turn knob for cursor control;