TB 9-6625-2340-24
(103) Adjust A4A8C29 (fig. 20) to center signal on center vertical graticule line.
(104) Adjust A4A8C13 (fig. 20) for best symmetry of signal.
(105) Remove 21.4 MHZ CRYSTAL FILTER BYPASS NETWORK(S) (fig. 18) from
between A4A8TP4 and A4A8TP5 (fig. 20).
(106) Press TI keys as listed in (a) through (c) below:
(a) FREQUENCY SPAN, 10, kHz.
(b) MARKER .
(c) RESA BW, 3, kHz.
MKR LVL should
(107) Adjust A4A8R40 (fig. 20) to align markers on display.
indicate 1.00X.
(108) Press TI 2-22 GHz key.
(109) Set attenuators for 25 dB.
(110) Press TI keys as listed in (a) through (h) below:
CENTER FREQUENCY, 100, kHz.
(a)
FREQUENCY SPAN, 3, kHz.
(b)
RES BW, 1, kHz.
(c)
ATTEN, 0, dB.
(d)
REFERENCE LEVEL, 30, dBm.
(e)
SCALE LOG, 1, dBm.
(f)
MARKER .
(g)
REFERENCE LEVEL, 20, dBm.
(h)
(111) Set attenuators for 15 dB.
LVL should
MKR
(112) Adjust A4A8R7 (fig. 13) to align markers on display.
indicate 0.00dB.
(113) Press TI REFERENCE LEVEL, 10, and dBm keys.
(114) Set attenuators for 5 dB.
(115) Adjust A4A8R6 (fig. 13) to align markers on display. MKR
LVL should
indicate 0.00dB.
(116) Press TI 2-22 GHz key.
(117) Set TI LINE switch to STANDBY.
(118) Replace TI top cover.
14. Log Scale Switching
a. Performance Check
(1) Press TI 2-22 GHz key.
(2) Connect TI CAL OUTPUT to TI RF INPUT.
(3) Press TI keys as listed in (a) through (e) below:
(a) CENTER FREQUENCY, 100, MHz.
(b) FREQUENCY SPAN, 100, kHz.
(c) REFERENCE LEVEL, 8, dBm.
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