TB 9-6625-2250-24
(7) Press TI CONTROL TRIG key, then [SINGLE] key, and wait for completion of
sweep. The noise level will be at least 6 dB below the display line; if not, reduce SPAN
[SPAN WIDTH] and CONTROL BW [RES BW] values to reduce noise level.
NOTE
If SPAN is reduced, [CF STEP] reduction must be no more
than 95 percent of the SPAN.
(8) If a residual is not present proceed to (13) below. If residual is suspected, press
CONTROL TRIG key then [SINGLE] key. Record the amplitude and frequency of any
response above the display line.
NOTE
Noise peak will not persist when [SINGLE] key is pressed.
However a residual response will persist.
(9) If response is marginal, press TI keys as listed in (a) through (d) below:
INSTRUMENT STATE SAVE.
(a)
[SAVE STATE].
(b)
[STATE 0].
(c)
MARKER ON.
(d)
(10) Position marker on peak of response in question and press TI keys as listed in
(a) through (e) below:
MARKER MKR then [MARKER CF].
(a)
SPAN then [SPAN WIDTH].
(b)
STEP four times.
(c)
CONTROL TRIG then [CONT].
(d)
CONTROL BW then [RES BW AUTO].
(e)
(11) Reduce SPAN [SPAN WIDTH] and CONTROL BW [RES BW] until [RES
BW] is 300 Hz. Record the frequency and amplitude of any residual response above the
display line. Residual responses will be <-90 dBm.
(12) Press TI keys as listed in (a) through (c) below:
(a) INSTRUMENT STATE RECALL.
(b) [RECALL STATE].
(c) [STATE 0].
(13) Press TI FREQUENCY key then [CENTER FREQ] key.
(14) Press STEP
key.
(15) Repeat (7) through (14) above to check for residuals up to 2.9 GHz.
(16) Press TI FREQUENCY key then [CENTER FREQ] to 2.915 GHz and repeat
(7) through (14) above to check residuals up to 6.46 GHz.
b. Adjustments. No adjustments can be made.