TB 9-6625-2250-24
14. Noise Sidebands
a. Performance Check
(1) Connect TI CAL OUTPUT to INPUT 50 .
(2) Press TI keys and enter values using DATA keys as listed in (a) through (w) below:
INSTRUMENT STATE PRESET.
(a)
FREQUENCY then [CENTER FREQ] to 300 MHz.
(b)
SPAN then [SPAN WIDTH] to 1 MHz.
(c)
AMPLITUDE then [REF LVL] to -10 dBm.
(d)
[ATTEN] to 0 dB.
(e)
MARKER PEAK SEARCH.
(f)
[SIG TRK ON].
(g)
SPAN then [SPAN WIDTH] 10 kHz and wait for completion of at least two sweeps.
(h)
MARKER ON.
(i)
[SIG TRK OFF].
(j)
CONTROL BW then [RES BW] to 300 Hz.
(k)
SPAN then [ZERO SPAN].
(l)
CONTROL BW then [VIDEO BW] to 1 Hz.
(m)
MARKER MKR then [MARKER REF LVL].
(n)
CONTROL TRIG.
(o)
[SINGLE].
(p)
[SINGLE] wait for completion of sweep.
(q)
MARKER ON.
(r)
[MARKER DELTA].
(s)
FREQUENCY then [CF STEP] to 9 kHz.
(t)
[CENTER FREQ].
(u)
STEP .
(v)
CONTROL TRIG.
(w)
NOTE
Using the CAL OUTPUT signal as the source, the checks must
pass with at least a 6 dB margin (added in (3) and (5) below) for
results to be valid. This is due to the phase-coherency of the
CAL OUTPUT signal and the internal local oscillators.
(3) Press TI [SINGLE] key and wait for completion of sweep. TI
MKR amplitude
indication will be less than -76 dBc.
(4) Press TI keys as listed in (a) through (d) below:
(a) FREQUENCY.
(b) STEP .
