TB 9-6625-2235-24
from 80 MHz to 100 kHz. The signal level will not exceed 1 division of 6th horizontal
graticule line.
b. Adjustments. No adjustments can be made.
13. Input Attenuator
a. Performance Check
(1) Connect synthesizer/level generator output 50 Ω to TI INPUT 50Ω.
(2) Position controls as listed in (a) through (f) below:
(a) TUNING control to 30 MHz.
(b) REQ SPAN/DIV switch to 200 kHz.
(c) RESOLUTION BW switch to 30 kHz.
(d) INPUT ATTEN switch to 70 dB (OPTIMUM INPUT switch to 30 dBm).
(e) REFERENCE LEVEL switch to 0 dBm.
(f) VIDEO FILTER control to 2 o'clock position.
(3) Adjust synthesizer/level generator frequency controls to 30 MHz and amplitude
controls to 0 dBm.
(4) Adjust signal peak to 6th horizontal line above graticule baseline with REF
LEVEL FINE control (reference).
(5) Set INPUT ATTEN switch to settings as listed in table 7 and adjust
synthesizer/level generator amplitude controls to position signal peak on 6th horizontal line
above graticule baseline on TI crt. Synthesizer/level generator output amplitude display
will indicate between specified limits.
b. Adjustments. No adjustments can be made.
Table 7. Input Attenuators
Test instrument
0 dB INPUT
OPTIMUM
Synthesizer/level generator
ATTEN
INPUT
amplitude display indications
(dBm)1
switch settings
switch settings
(dB)
(dBm)
Min
Max
60
20
-9.5
-10.5
50
10
-19.5
-20.5
40
0
-29.5
-30.5
See footnote at end of table.
