TB 9-6625-160-24
Table 1. Calibration Description Continued.
Test instrument parameters
Performance specifications
MEASUREMENT SPECIFICATIONS - Continued
Audio filters
Range:
30 kHz and 80 kHz Low Pass Filter
30 kHz Low Pass
Accuracy: 2 kHz at 3 dB cutoff
80 kHz Low Pass
Accuracy: 4 kHz at 3 dB cutoff
Option Dependent Filters
OPT 010 or 050
Accuracy:
40 Hz at 3 dB cutoff
400 Hz High Pass
OPT 011 or 051
Accuracy:
0.2 dB; 800 Hz
Psophometric (CCITT)
1 dB; 300 Hz to 3 kHz
2 dB; 50 Hz to 3.5 kHz
3 dB; 3.5 kHz to 5 kHz
OPT 012 or 052 (8903B only)
Accuracy:
0.1 dB at 6.3 kHz
CCIR Weighting
0.2 dB at 6.3 kHz to 7.1 kHz
0.4 dB at 7.1 kHz to 10 kHz
0.5 dB at 200 Hz to 6.3 kHz
1.0 dB at 31.5 Hz to 200 Hz, 10 kHz to 20 kHz
2.0 dB at 20 kHz to 31.5 kHz
OPT 013 or 053 (8903B only)
Accuracy:
0.1 dB at 1 kHz
C-Message Weighting
1.0 dB at 60 Hz to 5 kHz
OPT 014 or 054 (8903B only)
Accuracy:
0.1 dB at 6.3 kHz
CCIR/ARM Weighting
0.2 dB at 6.3 kHz to 7.1 kHz
0.4 dB at 7.1 kHz to 10 kHz
0.5 dB at 200 Hz to 6.3 kHz
1.0 dB at 31.5 Hz to 200 Hz, 10 kHz to 20 kHz
2.0 dB at 20 kHz to 31.5 kHz
OPT 015 or 055 (8903B only)
Accuracy:
0.1 dB at 1 kHz
A Weighting
0.5 dB at 20 Hz to 10 kHz
1.0 dB at 10kHz to 20 kHz
EQUIPMENT REQUIREMENTS
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. The items selected must be verified to perform satisfactorily
prior to use and must bear evidence of current calibration. The equipment must meet or
provide a four-to-one ratio between the standard and TI. Where the four-to-one ratio
cannot be met, the actual accuracy of the equipment selected is shown in parentheses.
5. Accessories Required. The accessories required for the calibration are common usage
accessories, issued as indicated in paragraph 4 above and are not listed in this calibration
procedure.
The following peculiar accessory is also required for this calibration
Feedthrough termination 600 Ω, HP model 11095A or Tektronix 011-0092-00, and
Feedthrough termination 50 Ω, HP model 11048C or Tektronix 011-0049-00.