TM 43-6625-916-12
RADAR TEST SET
0002 00
EQUIPMENT DESCRIPTION AND DATA - Continued
Pulse Spacing limits are calculated relative to the nominal specified spacing of R1 and R3.
In addition to the R1 and R3 pulse measurements, reply pulse R2 is verified by the Test Set to be within
+/-0.15 uS of nominal. The measurement data for R2 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 dBm MIN
61.5 dBm MAX
Receiver Sensitivity (MTL)6
-71 dBm MIN
-81 dBm MAX
Mode S
All measurements are made using the data from the all-call response (DF11).
Percent Reply
80 %
MIN
n/a
MAX
ISLS Percent Reply
n/a
MIN
10 %
MAX
Reply Delay1
Direct Connect
127.65 uS
MIN
128.35 uS
MAX
Radiated2
127.65 uS
MIN
128.35 uS
MAX
The following measurements are performed on the P1 (pulse 1) and the last data pulse (pulse 64) transmitted
by the transponder under test.
Pulse Frequency1,3
1086.90 MHz MIN
1093.10 MHz MAX
Pulse Width1
0.40 uS MIN
0.60 uS MAX
Pulse Space1,4
nominal -0.10 uS MIN
nominal +0.10 uS MAX
Width and position data of all other pulses in the transponder reply are checked for validity (+/-0.15 uS
tolerance from nominal). However, the user has access to measurement data for P1 and the last data pulse
only.
If the transponder was tested by directly coupling to the antenna cable the following are evaluated.
Pulse Power1,3,5
54 dBm MIN
60 dBm MAX
Receiver sensitivity(MTL)6
-78 dBm MIN
-74 dBm MAX
If the transponder was tested by an over-the-air measurement the following are evaluated.
Pulse Power1,3
51.5 dBm MIN
61.5 dBm MAX
Receiver Sensitivity (MTL)6
-71 dBm MIN
-81 dBm MAX
INTERROGATOR
NOTE
All measurements are performed on an average of the last 12 valid
interrogations from the Interrogator under test. The measurements assume
the distance between the Test Set and the interrogator antenna on the
aircraft is the distance stored in the TS-4530 setup menus. These
measurements can be saved in the TS-4530/UPM memory and recalled for
printout via the Bench Utility software (refer to WP0008 00).
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