TB 9-6625-2343-50
(6) Press TI keys as listed in (a) through (e) below:
(a) TRACK MODE (off).
(b) MEASUREMENT FM.
(c) HP FILTER 50 Hz.
(d) LP FILTER >20 kHz.
(e) DETECTOR AVG.
(7)
Adjust calibrator level for a TI indication of 50 kHz.
Press TI ΦM key.
(8)
(9)
If TI indication is not between 242.4 rad and 257.6 rad, perform b below.
(10)
Press TI keys as listed in (a) and (b) below:
(a) MEASUREMENT FM.
(b) HP FILTER 300 Hz.
(11) Set calibrator for a wideband output frequency of 1 kHz at a level of 446.3 mV.
(12) Adjust calibrator level for a TI indication of 250 kHz.
(13) Press TI ΦM key.
(14) If TI indication is not within limits specified in the first row of table 9, perform b below.
(15) Repeat technique of (10)(a) and (11) through (13) above for remaining calibrator
initial settings and TI FM deviations in table 9. If TI indications are not within limits
specified, perform b below.
Table 9. Φ
Modulation, 250 kHz FM
Deviation.
Test instrument
Calibrator
FM deviation
Φ Modulation indication
initial output
indication
(rad)
Frequency
Level (mV)
(kHz)
Min
Max
1 kHz
446.3
250
242.4
257.6
20 kHz
454.9
250
12.0
13.0
(16) Move TI sensor module from AM/FM test source FM OUTPUT to FM/32 OUTPUT.
(17) Set calibrator for a wideband output frequency of 20 kHz at a level of 233.3 mV.
(18) Press TI keys as listed in (a) and (b) below:
(a) AUTOMATIC OPERATION.
(b) MEASUREMENT FM.
(19) Adjust calibrator level for a TI indication of 4 kHz.
(20) Press TI keys as listed in (a) through (c) below:
(a) MEASUREMENT ΦM.
(b) AUTOMATIC OPERATION.
(c) MEASUREMENT ΦM.
(21) If TI indication is not between 0.193 rad and 0.207 rad, perform b below.
(22) Move TI sensor module from AM/FM test source FM/32 OUTPUT to FM/4 OUTPUT.
(23) Press TI keys as listed in (a) through (c) below:
(a) DATA 3.1.
(b) DATA SPCL.
(c) MEASUREMENT FM.
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