TB 9-6625-152-24
Table 1. Calibration Description Continued.
Test instrument parameters
Performance specifications
AM
Range: 400 kHz to 1.05 GHz, 10 Hz to 15 kHz modulation frequency
AM Depth
Range: 0 to 99% (2947); 0 to 99% (manually tuned), 0 to 90% <100 MHz;
0 to 80% 100 to 400 MHz (2947A)
Accuracy: 8% FS 1 digit (2947); 5% of setting 1 digit @ 1 kHz;
8.5% of setting 1 digit 50 Hz to 10 kHz (2947A)
Range: 400 kHz to 1.05 GHz
Residual AM
Range: 400 kHz to 1.05 GHz, 10 Hz to 15 kHz modulation frequency
FM
Deviation
Range: 0 to 75 kHz
Accuracy: 5% resolution, @ 1 kHz modulation frequency (Resolution is
10 Hz <2 kHz deviation, and 1% >2 kHz deviation) (2947);
5% resolution @ 1 kHz modulation frequency; 7.5%
resolution, 50 Hz to 10 kHz modulation frequency (Resolution
is 10 Hz <2 kHz deviation, and 1% >2 kHz deviation) (2947A)
RF SPECTRUM ANALYZER
Level
Frequency range: 100 kHz to 1.05 GHz (2947);
400 kHz to 1.05 GHz (2947A)
Dynamic range: 80 dB
Accuracy: 2 dB resolution (2947); 2 dB resolution (10 dB/div),
(Resolution is 0.1 dB on 2 dB/div or 0.5 on 10 dB/div) (2947A)
Frequency
Range: 10 Hz to 20 kHz
Accuracy: 0.01 Hz Freq. Std @ <180 Hz; 0.1 Hz Freq Std @ >180 Hz
Level
Range: 4 V rms (2947); 0.1 mV to 4 V rms (2947A)
Accuracy: 5% resolution, 50 Hz to 15 kHz (Resolution is 0.1 mV @
<409 mV or 1 mV @ >409 mV)
Level Distortion
Range: 4 V rms (2947); 0.1 mV to 4 V rms (2947A)
Accuracy: <0.5% @ 1 kHz; <1% @ 50 Hz to 15 kHz
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; AN/GSM-287; or AN/GSM-440. Alternate items may be used
by the calibrating activity when the equipment listed in table 2 is not available. The items
selected must be verified to perform satisfactorily prior to use and must bear evidence of
current calibration. The equipment must meet or exceed the minimum use specifications
listed in table 2. The accuracies listed in table 2 provide a four-to-one ratio between the
standard and TI. Where the four-to-one ratio cannot be met, the four-to-one accuracy of the
equipment selected is shown in parentheses.
5. Accessories Required. The accessories required for this calibration are common
usage accessories, issued as indicated in paragraph 4 above, and are not listed in the
calibration procedure. The following peculiar accessory is also required for this calibration:
RF Power Amplifier, Ophir RF, Model XRF733.