TB 9-6625-2333-24
[MORE 1 OF 3] then [COUPLING AC DC] to select DC.
(f)
CONTROL BW then [RES BW] to 1 Hz.
(g)
[VIDEO BW] to 1 Hz.
(h)
MARKER PEAK SEARCH.
(i)
INSTRUMENT STATE CAL.
(j)
[REF LVL ADJ].
(k)
(3) Slowly adjust TI knob until MKR indication is between -9.83 and -10.17 dBm.
Press [STORE REF LVL] key.
(4) Disconnect CAL OUTPUT from INPUT 50 : and connect a 50 : termination to
INPUT 50 :.
(5) Press TI keys and enter values using DATA keys as listed in (a) through
(e) below:
AMPLITUDE then [REF LVL] to -50 dBm.
(a)
SPAN then [SPAN] to 375 Hz.
(b)
CONTROL BW then [RES BW] to 1 Hz.
(c)
FREQUENCY then [CENTER FREQ] to 150 Hz.
(d)
MARKER MKR then [MARKERS OFF].
(e)
(6) Press TI keys and enter values using DATA keys as listed in (a) through (e) below:
(a) CONTROL BW then [VID AVG ON] to 5 Hz.
(b) CONTROL TRACE then [CLEAR WRITE A] and wait until VAVG 5 is
displayed above the graticule.
(c) INSTRUMENT STATE SGL SWP and wait for completion of new sweep.
(d) MARKER MKR to 30 Hz.
(e) [MKRNOISE ON OFF] to select ON.
NOTE
-2.27 dB amplitude correction is added for normalization to a 1
Hz noise bandwidth, log amplifier response, and envelope
detector response.
(7) Add -2.27 dB to TI MKR amplitude indication. Calculated displayed average
noise level will be d-90 dBm.
NOTE
If any of the displayed average noise level indications are
within 1.10 dB of the appropriate specification, repeat (6) and
(7) above setting the number of video averages to 100 in (6) (a)
above.
(8) Press TI keys and enter values using DATA keys as listed in (a) through (h) below:
(a) FREQUENCY then [CENTER FREQ] to 1 kHz.
(b) MARKER MKR then [MARKERS OFF].
6