TM 43-6625-916-12
RADAR TEST SET
0002 00
EQUIPMENT DESCRIPTION AND DATA - Continued
The following measurements are performed on the F1 and F2 pulses transmitted by the transponder under
test.
Pulse Frequency1,3
1086.90 MHz MIN
1093.10 MHz MAX
Pulse Width1
0.30 uS MIN
0.60 uS MAX
Pulse Spacing1,4
nominal -0.15 uS MIN
nominal +0.15 uS MAX
Pulse Spacing limits are calculated relative to the nominal specified spacing of F1 and F2.
In addition to the F1 and F2 pulse measurements, all other pulses in the reply transmitted by the transponder
under test are verified internally to be within +/-0.15 uS of nominal. The measurement data for these other
pulses is not available to the user.
If the transponder was tested by directly coupling to the antenna cable the following are evaluated.
Pulse Power1,3,5
52.5 dBm MIN
61.5 dBm MAX
Receiver sensitivity (MTL)6
-72 dBm MIN
-80 dBm MAX
If the transponder was tested by an over-the-air measurement the following are evaluated.
Pulse Power1,3
51.5 dB
MIN
62.5 dB
MAX
Receive sensitivity
-71 dB
MIN
-81 dB
MAX
Mode 4
Percent Reply
80 %
MIN
n/a
MAX
ISLS Percent Reply
n/a
MIN
10 %
MAX
Reply Delay1
Direct Connect
200.00 uS
MIN
203.35 uS
MAX
Radiated2
200.00 uS
MIN
203.35 uS
MAX
Since a Mode 4 reply can occur in a specified random position, reply delay measurements for Mode 4 are
normalized to the first reply position and compared to the limits above.
The following measurements are performed on the R1 and R3 pulses transmitted by the transponder under
test.
Pulse Frequency1,3
1086.90 MHz MIN
1093.10 MHz MAX
Pulse Width1
0.30 uS MIN
0.60 uS MAX
Pulse Space1,4
nominal -0.15 uS MIN
nominal +0.15 uS MAX
3
The average value of all the Frequency and Power measurements is displayed on the TS-4530/UPM screen by pressing the S3
button to access the parametric data.
4
Pulse spacing is not relevant for the first pulse.
5
For direct connect pulse power measurement, the cable loss factor is added to the measurement.
6
Receiver sensitivity is determined by a greater than 80% reply rate to twelve interrogations.
0002 00-13
Previous Page
