TB 9-6625-1914-24
(5) Set SCAN WIDTH (red) switch to PER DIVISION and adjust FREQUENCY
control to 5 MHz.
(6) Adjust FREQUENCY FINE TUNE control until half the local oscillator feed-
through signal appears at left graticule line on display.
(7) Adjust signal generator frequency to 10 MHz.
(8) Adjust A5A1R32 (fig. 6) to align signal pip with right graticule line on display (R).
(9) Readjust FREQUENCY FINE TUNE control as necessary to keep half of local
oscillator feed-through signal aligned with left graticule line on display.
(10) Adjust A5A1R13 (fig. 6) to align signal pip (100 MHz) with center graticule line
on display.
(11) Adjust signal generator to a frequency 10 MHz below nominal value listed in
(12) Adjust FREQUENCY FINE TUNE control to align signal pip with left
graticule line on display.
(13) Adjust signal generator frequency to nominal values listed in table 7 and make
corresponding adjustment until signal pip is aligned with right graticule line on display.
(14) Repeat (10) through (12) above until no further adjustment is required.
(15) Adjust A4R7 (fig. 6) until signal pip is aligned with center graticule line (R).
(16) Adjust A13R5 (fig. 6) until local oscillator feed-through signal is aligned with
center graticule line (R).
(17) Adjust A13R2 (fig. 6) until signal pip is aligned with center graticule line (R).
19. Frequency Response
a. Performance Check
(1) Connect equipment as shown in figure 7.
(2) Position TI controls as listed in (a) through (f) below:
(a) RANGE MHz switch to 0-110 (not on all models).
(b) FREQUENCY control to 60 MHz.
(c) BANDWIDTH switch to 100 kHz.
(d) SCAN WIDTH (red) switch to PER DIVISION.
(e) SCAN WIDTH PER DIVISION switch to 10 MHz.
(f) INPUT ATTENUATION switch to 30 dB.