TB 9-6625-2235-24
Table 1. Calibration Description - Continued
Test instrument
Performance specifications
parameters
Reference level
Range: -112 to +60 dBm
Step accuracy: Steps referenced with 0 dB input attenuation:
-10 to -80 dBm: 0.5 dB
-10 to -100 dBm: 1.0 dB
Vernier accuracy: 0.5 dB
Frequency response
Range: 100 kHz to 1500 MHz
Accuracy: 1 dB with 10 dB input attenuation
Residual FM
Less than 1 kHz peak-to-peak for time < 0.1 s
Noise sidebands
Sidebands existing more than 50 kHz from 400 MHz signal will be more than -65
dB from reference with 1 kHz resolution bandwidth and full video filtering
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; 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
standard and TI. Where the four-to-one ratio cannot be met, the four-to-one accuracy will
be listed, and 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 accessories are also required for this
calibration and must be supplied with TI: Display Mainframe, Hewlett-Packard, Model 180
series with 807 Option and Extender Cable Assembly, Hewlett-Packard, Model 5060-0303.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
ATTENUATOR (FIXED)
Range: 10 dB
Weinschel, Model 9918-10 dB
Frequency: 100 kHz to 1500 MHz
(9918-10dB)
Accuracy: 0.5 dB
COMB GENERATOR
Frequency: 500 to 1500 MHz
Tektronix, Type 067-0885-00
Accuracy: 0.5%
(067-0885-00)
FREQUENCY COUNTER
Range: 0.9 to 540 ms
Fluke, Model PM6681/656
(PM6681/656)
Accuracy: 1.9%
Range: 279.7 to 280.05 MHz
Accuracy: 0.005%
