TB 9-4931-488-35
Table 1. Calibration Description - Continued
Test instrument
parameters
Performance specifications
Internal
Range: 400 Hz and 1 kHz (fixed)
modulation
20 Hz to 600 kHz (variable option 001 & H66)
Accuracy: 3% (fixed); 15% (variable)
Distortion:
<0.5%, 400 Hz and 1 kHz
<0.5%, 20 Hz to 2 kHz
<1.0%, 2 to 200 kHz
<2.0%, 200 to 600 kHz
Range: 0 to 100% depth
Amplitude
(5.5% reading and 1.5% FS) 0.5 to 512 MHz
modulation
Accuracy:
(400 Hz and
Distortion:
<1% (0 to 50% depth) 0.5 to 512 MHz
1 kHz rate)
<3% (50 to 90% depth) 0.5 to 512 MHz
<10% (0 to 30% depth) 512 to 1024 MHz
(option 002)
<20% (30 to 90% depth) 512 to 1024 MHz (option 002)
0.5 to 512 MHz: (0.100 0.005) AM per mV peak
External sensitivity:
into 600Ω with AM vernier fully cw
Frequency response (option 004): <0.04 dB 90 to 150 Hz rate4
(108 to 118 and 329 to 335 MHz)
<0.1 dB 9 to 11kHz rate (108 to 118 MHz)
Demodulated
Range: 20 to 80% AM (108 to 118 and 329 to 336 MHz)
output
Ac output: %AM = (20 0.4%) per V rms
(option 004)
Dc output:1.414 0.010 V dc for 100% AM
Range: 0 to 2560 kHz deviation (5120 kHz option
002)5
modulation
(400 Hz and
(7% reading +1.5% FS) 0 to 2560 kHz
Accuracy:
1 kHz rate)
(except for maximum peak deviation
position which is (10% reading 1.5% FS)
Distortion:
<1% for deviations up to 1/8 maximum allowable
<3% for deviations up to maximum allowable
External sensitivity: 1 V into 600Ω yields maximum deviation indicated
on peak deviation switch with FM vernier fully cw
6% (0 to 2560 kHz)5
Accuracy:
1
Specifications apply to all options unless otherwise specified.
2When
below top 10 dB of vernier range, add 0.5 dB.
3Calibrated to 90 dB.
4Calibrated to <0.1 dB
5Calibrated to 320 kHz deviation.
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-287 or AN/GSM-705. 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 actual accuracy of the
equipment selected is shown in parenthesis.