TB 9-6625-2181-24
Table 1. Calibration Description - Continued
Test instrument parameters
Performance specifications
CN-1000/G, Hewlett-Packard, Model 350D
Attenuator
Range: 0 to 110 dB in 1 dB steps
Frequency: Dc to 100 KHz
< 0.125 dB at any step
Accuracy:
10 dB section:
< 0.25 dB from 0 to 80 dB
100 dB section:
< 0.5 dB above 80 dB
General Radio, Types 1450-TAR and 1450-TB
Attenuator
Range: 0 to 110 dB (0 to 111 dB for General Radio, Type 1450-TB)
Frequency: 0 to 100 kHz
0.02 dB, 0.25% of indicated switch value
Accuracy:
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with AN/GSM-286, AN/GMS-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
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 accessories are also required for this
calibration: Decade Resistor, Winslow, Model 336 (7907234) or Clarostat, Model 240C, and
voltage divider, 600- , double banana plug to triple banana jack (Hewlett-Packard, Model
11047A) (7911560).
NOTE
The voltage divider accuracy of 1.0 percent is critical in
calibration process.
NOTE
Decade resistor must be capable of dissipating 5 watts.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
Fluke, Model 5720A (5720A) (p/o
CALIBRATOR
Voltage range: 1 mV to 35 V ac
MIS-35947); w amplifier, Fluke
+20 to - 60 dBm
5725A/AR (5725A/AR)
0 to 45 V dc
0.3%.
Accuracy:
Frequency: 100 Hz to 1 MHz
CHANGE 1
