TB 9-6625-2171-24
Table 1. Calibration Description - Continued
Test instrument
Performance specifications
parameters
Range: 1 to 50 W (forward power)
1 to 20 W (reverse power)
Accuracy: r20%
FOR SERIAL #635 AND UP
Accuracy: r20% (1-2.0 W)
+20 to 27% (2.1-9.9 W)
+20% (10-50 W)
AN/ARM-186 and Collins, Model 972Q-4
RF frequencies:
VOR
Frequency: 108.00 and 108.05 MHz
Accuracy: +0.0025%
LOC
Frequency: 108.10 and 108.15 MHz
Accuracy: r0.0025%
Glide slope
Frequency: 334.50 or 334.10 and 334.70 MHz
Accuracy: r0.0025%
MKR BCN
Frequency: 75.00 MHz
Accuracy: r0.005%
RF power output:
VOR and LOC
>-10 dBm
Glide slope
>-20 dBm
MKR BCN
>-20 dBm
VOR
Frequency
Accuracy
AM
Distortion
9960 Hz
r0.01%
27 to 33%
<3%
1020 Hz
r2.5%
5 to 15%
<10%
30 Hz
r0.01%
27 to 33%
<5%
FM deviation
Frequency: 9960 Hz
Accuracy: 480 r30 Hz peak
Bearing
Range: 000 to 315q
Accuracy: r1q, except at 000, accuracy is r0.7q
LOC
Frequency
Accuracy
AM
Distortion
90 Hz
r0.01%
18 to 22%
<5%
150 Hz
r0.01%
18 to 22%
<5%
1020 Hz
r2.5%
5 to 15%
<10%
DDM
0 DDM; r0.005 DDM
0.155 DDM; r0.020 DDM
RF frequencies:
Glide slope
Frequency
Accuracy
AM
Distortion
90 Hz
r0.01%
36 to 44%
<5%
150 Hz
r0.01%
36 to 44%
<5%
DDM
0 DDM; r0.010 DDM
0.175 DDM; r0.025 DDM
MKR BCN
Frequency
Accuracy
AM
Distortion
400 Hz
r2%
90 to 100%
<15%
1300 Hz
r2%
90 to 100%
<15%
3000 Hz
r2%
90 to 100%
<15%
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM 286; AN/GSM-287; or AN/GSM-705. Alternate items may be used
by the calibrating activity. The items selected must be verified to perform satisfactorily
prior to use and must bear evidence of current calibration. The equipment must meet or
