TB 9-6625-164-24
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Communication Test Set, IDS, Model 93. AFTO 33K3-4-3212-1 was used as
the prime data sources in compiling these instructions. The equipment being calibrated
will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 2
hours using the dc and low frequency technique.
2. Forms, Records, and Reports. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description.
Test instrument parameters
Performance specifications
Range: Variable, 250 Hz to 4000 Hz
Fixed 404, 1004, 2804, 3804, and 2713 Hz
Accuracy:
0.01%
Level
Range: Variable, +6 to 26 dBm
Fixed, +6.0, +3, 0, 7, and 13 dBm
Accuracy:
0.5 dB
Receiver
Range: 250 to 4000 Hz
Accuracy:
0.01% 1 Hz
Level
Range: +12 to 70 dBm (Battery Operation)
+12 to 60 dBm (AC Adapter Operation)
Accuracy:
0.5 dB
Filters
Range: C-MSG and 3 kHz
Accuracy:
LIMITS
C-MSG (Loss in dB)
3 kHz FLAT (Loss in dB)
200
-27.0 to -23.0
N/A
250
N/A
-0.5 to +0.5
600
-5.7 to -3.7
N/A
1000
REFERENCE
REFERENCE
1004
N/A
-0.6 to +0.4
3000
-3.5 to -1.5
-3.5 to -2.5
4000
-17.5 to -11.5
-6.7 to -5.7
5000
-31.5 to -25.5
N/A
Transmission Distortion
Range: 250 to 4000 Hz
Accuracy: <50dBc
2
