TB 9-6625-2250-35
b.
Adjustments
NOTE
Allow TI 30 minutes warm-up before performing the
adjustment below.
(1) Adjust A15R306 (located on A15 board) for a measuring receiver indication
between 299.99997 and 300.00003 MHz.
(2) Adjust A15R561 (located on A15 board) for a measuring receiver indication
between -9.95 and -10.05 dBm.
a. Performance Check
(1) Connect TI CAL OUTPUT to INPUT 50Ω.
(2) Press TI keys and enter values using the DATA keys as listed in (a) through (k)
below:
(a)
INSTRUMENT STATE PRESET.
(b)
FREQUENCY then [CENTER FREQ] to 300 MHz.
(c)
SPAN then [SPAN WIDTH] to 2.5 kHz.
(d)
AMPLITUDE then [REF LVL] to -10 dBm.
(e)
[ATTEN] to 0 dB.
(f)
CONTROL BW then [RES BW] to 100 Hz.
(g)
[VIDEO BW] to 30 Hz.
(h)
MARKER PEAK SEARCH.
(i)
AMPLITUDE.
(j)
[MORE].
(k)
[REF LVL CAL].
(3) Slowly adjust TI knob until MKR indication is between -9.83 and -10.17 dBm.
(4) Disconnect CAL OUTPUT from INPUT 50Ω and connect a 50 Ω termination to
INPUT 50Ω.
(5) Press TI keys and enter values using DATA keys as listed in (a) through (h)
below:
(a)
AMPLITUDE then [REF LVL] to - 50 dBm.
(b)
SPAN then [ZERO SPAN].
(c)
FREQUENCY then [CENTER FREQ] to 10 kHz.
(d)
CONTROL BW then [VIDEO BW] to 1 Hz.
(e)
CONTROL TRIG.
(f)
[SINGLE].
(g)
[SINGLE] wait for completion of sweep.