TB 9-6625-1914-24
(d) BANDWIDTH switch to 1 kHz.
(e) SCAN WIDTH switch to ZERO.
(f) INPUT LEVEL switch to -60 dBm/dBV.
(g) 20 kHz MARKERS switch released (out).
(3) Position IF plug-in controls as listed in (a) through (h) below:
(a) SCAN TIME PER DIVISION switch to 50 ms.
(b) LOG/LINEAR switch to LINEAR.
(c) LINEAR SENSITIVITY control to 0.1 V/DIV.
(d) VERNIER control fully ccw.
(e) VIDEO FILTER switch to 10 Hz with model 8552B, 100 Hz with model
8552A.
(f) SCAN MODE switch to INT.
(g) SCAN TRIGGER switch to AUTO.
(h) BASE LINE CLIPPER control fully ccw.
(4) Observe average noise level displayed on display section as frequency is varied
from 7 to 300 kHz. The average noise level will be below the fourth graticule line
throughout the range.
b. Adjustments. No adjustments can be made.
49. Spurious Responses
a. Performance Check
(1) Position TI controls as listed in (a) through (i) below:
(a) RANGE switch to 0-300 kHz.
(b) FREQUENCY control to 100 kHz.
(c) FINE TUNE control centered.
(d) BANDWIDTH switch to 300 Hz.
(e) SCAN WIDTH switch to PER DIVISION.
(f) PER DIVISION switch to 20 kHz.
(g) INPUT LEVEL switch to -40 dBV.
(h) dBm-dBV switch to dBV.
(i) 20 kHz MARKERS switch OUT.