TB 9-6625-2363-35
(b)
Frequency, 1, 0, [MHz].
(c)
Amplitude, 1, 0, [dBm].
FM/ΦM, [FM/ΦM], [ΦM], [ΦM Rate], 1, [kHz].
(d)
[ΦM Dev], 9, 0, [rad].
(e)
[ΦM], [ΦM Off On] to on.
(f)
(g)
RF On/Off to RF on.
(6) Using audio analyzer, measure the audio distortion. Distortion will indicate
within limits specified in first row of table 15.
(7) Repeat technique of (5) (b) and (e) above using the TI frequency and ΦM dev
settings and audio analyzer indications listed in table 15. Audio analyzer will indicate
within limits specified in table 15.
Test instrument
Test instrument
Audio analyzer
DATA
DATA
distortion indications
carrier frequency
phase modulation
(< %)
10 MHz
90 rad
1
500 MHz
45 rad
1
1 GHz
90 rad
1
2 GHz
180 rad
1
4 GHz
360 rad
1
(8) Reduce all outputs to minimum.
b. Adjustments. No adjustments can be made.
16. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
16 CHANGE 1
