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Figure 1. Frequency response - equipment setup.

Calibration Procedure For Electronic Voltmeters An/Urm-145 (Me-247/U) And An/Urm-145A (Me-247A/U) Page Navigation
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TB 9-6625-2287-24
(7) Adjust signal generator frequency controls to value listed in signal generator
frequency settings listed in table 5.
(8) Configure measuring receiver to measure RF power in mV.
(9) Adjust signal generator output voltage controls for .1 V indication on TI meter.
Measuring receiver indication will be within limits specified in table 5.
(10) Adjust signal generator for remaining frequency settings listed in table 5.
Measuring receiver indication for remaining frequency settings will be within limits
specified in table 5.
Table 5. Frequency Response1
Measuring receiver indications2
Measuring receiver indications3
Signal generator
frequency settings
(mV)
(mV)
(MHz)
Min
Max
Min
Max
3
95
105
95
105
5
95
105
95
105
7
95
105
95
105
10
95
105
95
105
20
95
105
95
105
50
95
105
95
105
100
95
105
95
105
175
95
105
95
105
200
95
105
90
110
300
95
105
90
110
400
95
105
90
110
1Verified
to 100 MHz for all systems codes except COO; for COO, verify to 400 MHz.
2AN/URM-145
(ME-247/U).
3AN/URM-145A (ME-247A/U).
10. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
10


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