TB 9-6625-1957-35
Table 1. Calibration Description Continued
Test instrument
parameters
Performance specifications
Ac dBm/dBV
Range: -40 to +40 dB (in 5 ranges)
Accuracy: (dB)1
+20 to -15 dB:
20 Hz to 20 kHz
0.5
-15 to -20 dB:
20 Hz to 2.0 kHz
0.5
2.0 to 10 kHz
1.5
Range: 0 to 20 MΩ (in 5 ranges)
Accuracy: (% of reading + % of FS)
Range:
200 Ω through 200 kΩ (LOΩ)
0.15 + .015
2 kΩ through 2000 kΩ (HIΩ)
0.15 + .015
2000 kΩ (LOΩ)
0.3 + .015
20 MΩ (HIΩ)
0.5 + .015
Dc current
Range: 0 to 2000 mA (in 5 ranges)
(0.2% of reading + .015% of FS)
Accuracy:
Dc High Voltage Probes (All Models)
Dc voltage
Range:
1 to 40 kV
2
Accuracy: 4.00% at 1 and 40 kV
3.0% at 10 kV
2.0% at 20 and 30 kV
1.0% at 25 kV
1Accuracy
applies to TI display value. To obtain correct dB reading, algebraically add the range selected to the display
reading. Dynamic range is -60 to +56.2 dBm.
2Verified at 1000 V only.
REQUIPMENT 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 and 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
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 ration
cannot be met, the actual accuracy of the equipment selected is shown in parenthesis.
5. Accessories Required. The
accessories required for this
calibration are common
usage accessories, issued as indicated in paragraph 4 above, and re not listed in this