TB 9-6625-1914-24
(5) Set SCAN WIDTH PER DIVISION switch to 10 kHz and center the 30 MHz
signal, using TI FINE TUNE control.
(6) Set BANDWIDTH switch to 10 kHz, using FINE TUNE control to keep the 30
MHz signal centered on the display.
(7) Adjust LOG REF LEVEL controls so that 30 MHz signal peak aligns
with the -70 dBm graticule line near ccw limit. It may be necessary to readjust AMPL
CAL control.
(8) Rotate LOG REF LEVEL switch seven steps in a cw direction.
Signal
amplitude should increase by one division (10 dB) at each step.
(9) Adjust VERTICAL GAIN control to place the 30 MHz signal peak exactly even
with LOG REF (top) graticule line.
(10) Repeat (7) through (9) above until no further adjustment of VERTICAL GAIN
control is necessary.
(11) Set LOG REF LEVEL controls to -30 dBm and adjust AMPL CAL control to
align the 30 MHz signal peak on top graticule line.
(12) Set LINEAR SENSITIVITY controls to 1mV/DIV and set TI LOG/LINEAR
switch to LINEAR.
(13) Readjust AMPL CAL control for signal display of 7.1 divisions.
a. Performance Check
(2) Position TI controls as listed in (a) through (c) below:
(b) SCAN WIDTH PER DIVISION switch to 10 MHz.
(3) Position IF plug-in switches as listed in (a) and (b) below:
(a) LOG/LINEAR to LOG (LOG to 10 dB).
(b) VIDEO FILTER to OFF.
display on crt. Signal display will align within 1.5 divisions of center graticule line.
(6) Repeat technique of (4) and (5) above at 200 MHz intervals across entire TI band.
b. Adjustments. No adjustments can be made.