TB 9-6625-1914-24
(13) Set SCAN TIME PER DIVISION switch to 5 ms.
(14) Set SCAN WIDTH PER DIVISION switch to 20 kHz.
(15) Adjust function generator no. 1 frequency to 20 kHz.
(16) Adjust signal generator and function generator no. 1 amplitude controls until a
signal pip is displayed every 20 kHz across display.
(17) Repeat technique of (11) above for 20 kHz signal pips. A 20 kHz pip will appear
within .24 division of eighth graticule line to right.
b. Adjustments. No adjustments can be made.
18. Tuning Dial Accuracy and Range
a. Performance Check
(1) Connect signal generator to RF INPUT.
(2) Position TI controls as listed in (a) through (e) below:
(a) FREQUENCY control to 5 MHz.
(b) BANDWIDTH switch to 30 kHz.
(c) SCAN WIDTH PER DIVISION switch to 1 MHz.
(d) INPUT ATTENUATION switch to 0 dB.
(e) RANGE MHz switch to 0-110 (not on all models).
(3) Position IF plug-in switches as listed in (a) through (f) below:
(a) LOG REF LEVEL to -40 dBm.
(b) SCAN TIME PER DIVISION to 2 ms.
(c) VIDEO FILTER to OFF.
(d) SCAN MODE to INT.
(e) SCAN TRIGGER to AUTO.
(f) LOG/LINEAR to LOG (10 dB LOG on Model 8552B).
(4) Adjust FREQUENCY FINE TUNE control until half of local oscillator feed-
through signal pip appears at left graticule line on display.
(5) Adjust signal generator frequency to align signal pip with right graticule line on
display. If signal generator does not indicate between 9 and 11 MHz, perform b (1) through
(8) below.
(6) Adjust FREQUENCY control to 100 MHz and FREQUENCY FINE TUNE
control to center of range.