TB 9-6625-1914-24
44. Marker Accuracy
a. Performance Check
(1) Connect TRACKING GEN OUT connector to INPUT connector, using cable.
(2) Position TI controls as listed in (a) through (j) below:
(a) RANGE switch to 0-300 kHz.
(b) FREQUENCY control to 300 kHz.
(c) FINE TUNE control centered.
(d) BANDWIDTH switch to 10 Hz (Model 8552B); 50 Hz (Model 8552A).
(e) SCAN WIDTH switch to ZERO.
(f) PER DIVISION switch to 1 kHz.
(g) TRACKING GEN LEVEL control to CAL 100 mV.
(h) INPUT LEVEL switch to -20 dBm/dBV.
(i) dBm/dBV switch to dBV.
(j) 20 kHz MARKERS switch OUT.
(3) Position IF plug-in controls as listed in (a) through (g) below:
(a) SCAN TIME PER DIVISION switch to 5 ms.
(b) LOG REF LEVEL switch to -10 dBV.
(c) LOG/LINEAR switch to 10 dB LOG.
(d) VIDEO FILTER switch to OFF.
(e) SCAN MODE switch to INT.
(f) SCAN TRIGGER control to AUTO.
(g) BASE LINE CLIPPER control fully ccw.
(4) Adjust TRACK ADJ control to peak trace as high as possible on display screen.
(2) Set LOG/LINEAR switch to LINEAR and LINEAR SENSITIVITY control to
20 mV/DIV, and repeat (3) above.
(3) Disconnect TRACKING GEN OUT connector from TI INPUT connector and
connect to frequency counter.
NOTE
It may be necessary to increase setting of TRACKING GEN
LEVEL control to obtain reading on frequency counter.
(4) Position TI switches as listed in (a) through (c) below.