TB 9-6625-106-24
(12) Set TI outputs to minimum.
Table 12. Locked Low Noise FM Mode On.
Frequency Deviation
TI Carrier Frequency
(GHz)
Min (kHz)
Max (kHz)
5
270
330
20
270
330
b. Adjustments. Perform paragraph 11 (b) Locked FM Mode On. After adjustment
repeat 11 a and 12 a.
13. Unlocked Narrow FM Mode On
a. Performance Check
(1) Press TI keys as listed in (a) through (e) below:
(a) System, Reset.
(b) Edit L1, 0, dBm.
(c) Edit F1, 5, GHz.
(d) Modulation, FM, Internal/External, select external.
(e) on/off, turn on External FM.
(2) Allow measuring receiver to tune to TI carrier frequency, then measure FM
Deviation, with PEAK + -/2 detector, no filters, record FM Deviation reading as (N).
(3) On the TI press, on/off, turn off External FM.
(4) On the TI press, Internal/External, select Internal FM.
(5) On the TI press, Edit Deviation, 300, kHz.
(6) On the TI press, Mode, Unlocked Narrow, <Previous.
(7) On the TI press, on/off, turn on Internal FM.
NOTE
Allow the measuring receiver to re-acquire the frequency as the
TI frequency will shift slightly when FM is turned on.
(8) Set measuring receiver to measure FM Deviation with PEAK + detector, and
record FM Deviation reading as (S+N).
(9) Calculate actual frequency deviation by using the following formula,
Sactual = (S+N)-N.
perform b below.
(11) On TI turn off Internal FM, then repeat (1) (c) through (e) and (3) through (10)
above for the remaining frequency listed in table 13. If the calculated frequency deviation
is not within limits listed in table 13, perform b below.
(12) Set TI outputs to minimum.