TB 9-6625-1967-24
Test instrument parameters
Performance specifications
AN/USM-437(V)1 (Tektronix, Type 1503 Option 4) and Tektronix, Type1503
Vertical deflection
Range: + 6 to -18 dB
Accuracy: 3%
Deflection reference
Range: 7 steps, 10-dB increments; 0 to 60 dB
Accuracy: 0.1 dB
Variable (additive to step increments)
Range: 0 to 18 dB
Accuracy: 2.0 dB
Dielectric scales
Solid poly: Vp/Vair = 0.66
Foam poly: Vp/Vair = 0.81
Variable: Vp/Vair = 0.31 to 1.0
Accuracy: 2% when VAR turned fully cw
Scale multipliers
Range: X10 and X100
Accuracy: 2%
Distance dial
Range: X10, 0 to 2500 ft; X100, 0 to 25,000 ft
Accuracy: 2% (+1 digit added to distance
control)
Tektronix, Types 1502 and 1502 Option 4
Range: 5 to 500 m /DIV in 7 steps
Vertical system deflection factor
Accuracy: 3%
Distance dial
Range: X.1, 0 to 100 ft; X1, 0 to 1000 ft
Accuracy: 2% 0.05 ft for X.1
2% 1 digit for X1
Dielectric scales
Solid PTFE: Vp/Vair = 0.70
Solid POLY: Vp/Vair = 0.66
OTHER-VAR: Vp/Vair = 0.55 to 1
Accuracy: 2% when VAR turned fully cw.
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 selected is shown in parentheses.
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: Attenuator, X10, Tektronix, Type 011-0059-02 and Termination, 50 ;
Tektronix, Type 011-0123-00 (supplied with TI) or (Agilent 11048B or 11048C).