TB 9-6625-1914-24
(d) FREQUENCY FINE TUNE control centered.
(12) Adjust FREQUENCY control to 0 MHz. If local oscillator feed-through signal
does not appear at center graticule line 0.2 division on display, perform b (16) below.
11 MHz. If signal pip does not align with center graticule line 0.2 division on display,
perform b (17) below.
b. Adjustments
(1) Connect TI and IF plug-in to extender and connect extender to display section.
(2) Adjust FREQUENCY control to 0 MHz.
(3) Set SCAN WIDTH (red) switch to ZERO and center TUNING RANGE
adjustment A5A1R13 (fig. 6).
Figure 6. Model 8553( ) - adjustment locations.
(4) Adjust A7A1R3 (fig. 6) for maximum baseline lift on display. This will indicate
signal coincidence with ZERO SCAN WIDTH selected (R).
24