TB 9-6625-2083-35
Minimum use
Manufacturer and model
Common name
specifications
(part number)
FREQUENCY COUNTER
Range: 995 to 1005 Hz
Fluke, Model PM6681/656
0.1%
(PM6681/656)
Accuracy:
Hewlett-Packard, Model 3458A
Range: -2.02 to + 75.2
Accuracy: 0.025%
(3458A) w/HV probe
Hewlett-Packard, Model K25-
Range: -2020Vdc
3490A
Accuracy: 0.25%
Time markers:
Fluke, Model 5820A-5C-GHZ
CALIBRATOR
Range: 10 ns to 5 s
(5820A-5C-GHZ)
Accuracy: 0.75%
Voltage amplitude: 5 mV to 10 v
Range: at 1 kHz
Accuracy: 0.5%
Pulses:
Range: 1 ms to 1 s
Risetime: 1 ns or less
DVM: Range: -2020 to +75.2 V dc
Accuracy: 0.025% (0.5%
w/HV probe)
CALIBRATION PROCESS FOR AN/USM-273 (OS-188U AND TEKTRONIX, TYPE
453) AND TEKTRONIX, TYPES 453A, 453A3, AND 453MOD703H
6. Preliminary Instructions
Personnel should become familiar with the entire bulletin before beginning the calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturers' manuals for this TI.
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 16. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to TI.
CHANGE 1
