TB 9-4931-491-35
Table 1. Calibration Description Continued
Test instrument parameters
Performance specifications
Sweep width accuracy
200 kHz to 500 MHz, calibrated in 10 MHz
intervals
10 MHz
Band 1:
20 MHz
Band 2:
20 MHz
Band 3:
RF output accuracy
+10 to -80 dBm
0.5 dB to 500 MHz
0.75 dB from 1 to 500 MHz (when read with
Flatness at 10 dBm
measuring receiver)
1This
procedure covers only band 1 performance specifications check.
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. 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.
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 this
calibration procedure. The following peculiar accessory is also required for this calibration:
Semiconductor Device (Coaxial Crystal Detector), Hewlett-Packard Model 423A003
(7923182).
Table 2. Minimum Specifications of
Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
MEASURING RECEIVER
Flatness measurement:
Hewlett-Packard, Model 8902A
w/sensor, Hewlett-Packard, Model
Accuracy: 0.188 dB
11722A (11722A)
Frequency measurement:
Range: 50 to 500 MHz
Accuracy: 0.5%
Power measurement:
Range: +10 dB to -80 dB
Accuracy: 0.125 dB
Range: 1 to 50 V dc
Fluke, Model 8840A/AF05
Accuracy: 0.1%
(AN/GSM-64D)
Range: 1 mV/cm sensitivity
(OS-303/G)
Accuracy: 3%
Range:
10 to 110 MHz
(SG-1207/U)
Display Accuracy: 0.00125%