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FEATURES
* Complies with U.S. National Standard for the IFF Mark X (SIF) Air Traffic Control Radar Beacon System (ATCRBS) characteristics.
Target Corporation's Interrogator Set is a lightweight, transportable Radar Recognition Set, which is intended primarily for use with one or more Decoder Groups, Radar Indicators, and Radar Sets.
The Interrogator Set is capable of interrogating MARK XII IFF/SIF type Radar Identification Sets (transponders), receiving the r-f replies from them and processing the replies into proper video signals to be applied to the Decoders and Indicators. The interrogations are transmitted on a crystal-controlled frequency of 1030 MHz; the replies are received at 1090 MHz. The Interrogator Set generates interrogation pulse pairs for Modes 1, 2, 3/A, and C whenever one of these modes is challenged. Optional expansion to include modes B and D is available. The Interrogator Set is capable of transmitting auxiliary Mode 4 interrogations. Operation from an external coder is also available.
In normal operation, the Interrogator Set is remotely controlled by a Decoder Group and Interrogator Control C8430 (furnished on special request). However, the Interrogator Set can be controlled locally by means of front panel controls. Connector receptacles for all the interconnecting cables are mounted on the rear panel (with the exception of the antenna connector, which is located on the front panel). A meter on the front panel is provided for checking voltage levels, currents and the standing wave ratio (SWR) of the antenna circuits.
Slide out chassis, printed circuit boards, spare card slots, and modular power supplies (which can be removed physically without interrupting operation) enable convenient servicing.
OPERATIONAL CHARACTERISTICS
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 (not provided)
Coding
Internal: P1, P2 and P3 pulses
External: optional
Transmitter
Frequency of 1030 (±0.2) MHz
Min Peak RF Power-2000 watts at duty cycles up to 1.0%
Receiver
Center Frequency of 1090 (±0.5) MHz
3 dB bandwidth of 8.0 MHz
Receiver Gain of 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 Ibs
Operating Temperature
Range of -28°C to +65°C
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
INPUT REQUIREMENTS
Power 20 Watts
Voltage . .105,115, or 125 (±10%) volts
at 50 - 400 Hz
Radar Trigger Input
Parameters
Polarity Positive
Amplitude 5 to 55 volts
Duration 0.30 to 25.0 ,µsec
Rise Time 0.01 to 2.2 µsec
Fall Time 1 to 5 times pulse
rise time
Input Impedance 75 ohms,
resistive ±5 ohms
OUTPUTS
Mode 4 Trigger, Processor Trigger,
SIF Trigger, Radar Trigger Out
Parameters
Amplitude ..20 volts (into 75 ohms)
Polarity Positive
Duration 1 µsec
Rise and Fall Time Iess than
0.1 µsec
Timing-The Mode 4 and Processor
Triggers can be adjusted to
precede the Radar Trigger Out
from 0 to 999 µsec. The SIF
Trigger can be adjusted to pre-
cede the Radar Trigger Out
from 0 to 99 µsec.
The Radar Trigger Out can be
adjusted to be delayed from the
input trigger from 0 to 67,000
µsec.
Remote Fault-Presents a ground
levei in the absence of either
the Mode 4, Processor, or SIF
Trigger.
