TM 43-6625-916-12
RADAR TEST SET
0002 00
EQUIPMENT DESCRIPTION AND DATA - Continued
Internal Battery Charger
Operates from External DC Input
Full recharge time within 8 hours from fully discharged state (actual
charge time depends on level of discharge) Battery will charge with
unit operating unless an external COMSEC is connected.
Automatic charge termination when fully charged
Automatic charge restriction to 0 to +40 C nominal battery
temperature range
Safety charge termination at +85 C nominal battery temperature
range
Low Battery Indication
Display indicates "BATTERY" when less than 20 % capacity
remains, flashes "BATTERY" at slow rate when less than 5%
capacity remains
Discharge Protection
Test Set automatically shuts off to prevent excessive battery
discharge.
Signal Generator
1030 or 1090 0.01 MHz
Generator Power
+4 to 44 dBm, 1dB resolution, 1.5dB accuracy at antenna
connector, +/- 2dB radiated antenna field strength -40 to 88 dBm,
1dB resolution, 1.5 dB accuracy at direct port
Pulse shape and timing
Modes 3/A, C, S comply with RTCA/DO-181B, mode 1, 2, 4 comply
with DOD AIMS 97-1000
ISLS Amplitude
Equal to P1 on difference or sum ports when enabled.
Interrogation Rate
(transponder test mode)
Modes 1,2,3/A,C,4
235 +/- 5 Hz
Mode S
50 +/- 5 Hz (short), 12.5 +/-5 Hz (long)
nd
rd
2 and 3 harmonic >30 dBc
Spurious
Applies at greater than 60 MHz from TX center frequency
-50 dBm maximum in standby / 50 dBc or 50 dBm max in transmit
when measured at the antenna connection.
Measurement Receiver
General
Frequency Range
1090 or 1030 MHz
Amplitude Range
+68 to +20 dBm at direct port, +24 to 24 dBm at antenna port
Input Protection
(1us pulse width, 1% max duty cycle)
Direct Input
+68 dBm
Antenna Input
+30 dBm at antenna connection
NOTE
The minimum recommended antenna distance to prevent damage is 3 feet (1
meter) from an active transponder antenna, and 16 feet (3 meters) from an
active high-power interrogator antenna.
Receiver Measurements
Received Power
0.1dB resolution, 1.5 dB accuracy at antenna port, 1.5 dB at direct
port, +/- 2dB antenna field strength
Method
Peak power of pulse obtained using 100 ns averaging period
Frequency
0.01 MHz resolution
+/-0.10 MHz accuracy with >400ns pulse width (transponder mode)
+/-0.05 MHz accuracy with >750ns pulse width (interrogator mode)
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