TB 9-6625-1914-24
(5) SCAN WIDTH switch to PER DIVISION.
(6) SCAN WIDTH PER DIVISION switch to 10 MHz.
(7) INPUT ATTENUATION control to 10 dB.
(8) TUNING STABILIZER switch to ON (up).
(9) SIGNAL IDENTIFIER switch to OFF.
f. Position IF plug-in as listed in (1) through (9) below:
(1) TRIGGER switch to LINE.
(2) BASE LINE CLIPPER control ccw.
(3) SCAN TIME PER DIVISION switch to 5 ms.
(4) LOG/LINEAR switch to LOG (10 dB LOG).
(5) LOG REF LEVEL switch to 0 dBm.
(6) LOG REF LEVEL VERNIER control to 0.
(7) VIDEO FILTER switch to 10 kHz.
(8) SCAN MODE switch to INT.
(9) SCAN INTENSITY control adjusted for normal display.
g. Connect IF CAL OUTPUT connector to TI RF INPUT connector.
h. Adjust TI FREQUENCY control until display indicates a local oscillator feed-
through signal along with the first, second, and third harmonic of the 30 MHz calibrator
output signal.
i. Readjust TI FREQUENCY control until local oscillator feed-through signal aligns
with third left (-3) graticule line (30 MHz signal should be near the center graticule line).
j.
Perform the following display adjustment procedure as listed in (1) and (2) below.
(1) Set SCAN TIME PER DIVISION switch to 10 seconds. Adjust FOCUS and
ASTIGMATISM controls for normal display.
(2) Reset SCAN TIME PER DIVISION switch to 5 ms and adjust TRACE ALIGN
control to position trace parallel with horizontal graticule lines.
k. Perform the following RF and IF section adjustments listed in (1) through (13) below.
(1) Adjust VERTICAL position control to place crt trace on bottom horizontal
graticule line.
(2) Adjust HORIZONTAL POSITION control to center the display.
(3) Adjust HORIZONTAL GAIN control for a 10-division trace display.
The
horizontal position and gain controls may interact.
(4) Adjust FREQUENCY control to center the 30 MHz calibrator output signal at
center graticule line.
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