TB 9-6625-1914-24
Table 1. Calibration Description - Continued
Test instrument parameters
Performance specifications
Model 8555( ) - continued
Residual FM
Stabilized: <100 Hz p-p
Unstabilized: <10 kHz p-p
Residual response
<-90 dBm
Scan accuracy
Frequency error between any two points on display is
Sensitivity
Average noise level for a 10 kHz bandwidth varies from -
107 dBm at 0.01 GHz to -80 dBm at 18.00 GHz
Model 8556( )
<400 V (4th graticule on display)
Average noise level
500 Hz, 0-30 kHz, 3 kHz, 0-300 kHz (with model
Center frequency accuracy
8552B) 1 kHz, 0-30 kHz; 5 kHz, 0-300 kHz (with Model
8552A)
2.3% from 20 Hz to 300 kHz
Frequency response
Every 20 kHz 0.01%
Marker accuracy
3% between any 2 display points w/Model 8552B
Scan width accuracy
5% between any 2 display points w/Model 8552A
Spurious responses
>70 dB below a -40 dBm signal at 2 and 100 kHz
Accuracy: 100 3.5 mV
Frequency response: 100 5 mV
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-286, 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 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
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)