5-11-3 Track Adjust; 5-11-4 Variable Sweep Speed - IFR FM/AM-1200A Operation Manual

5-11-3 TRACK ADJUST
While using the 3 kHz or 300 Hz resolution band, whenever dispersion,
sweep speed or bandwidth is changed or when sweeping an external narrow
band filter, the signal tracking may need to be adjusted.
Press the + or
+
key to set the FM/AM-1200S to the Track Adjust mode.
The following display will appear on the VFD:
This display will be followed by a number from
- =::;:==:;:==;=::;==r==;=::;==;:j]
I J-:-Jsl
Cl]
I I I I
I
to
I 1-lslDI I I Il l
By continuing to press or hold the+ or+ key, the waveform trace on the
Spectrum Analyzer screen may be adjusted to maximum amplitude. At the
same time, the relative number following the words TRACK ADJ will
increment or decrement accordingly. Continue to press or hold the+ or
+ key until the trace reaches maximum amplitude.
~
Press
~
This will set the TRACK ADJ relative number to ''0''. Any
further adjustment to the trace using the TRACK ADJ mode will then be
incremented from this "0'' setting.
To leave the TRACK ADJ mode, simply press any other key on the Keyboard
( 18 ) .
5-11-4 VARIABLE SWEEP SPEED
The horizontal sweep speed of the Tracking Generator may be varied to
allow better resolution of frequency and amplitude components by use of
the HORIZONTAL Sweep Vernier Control (25) in a manner similar to that
used to vary the sweep speed of the Oscilloscope.
When the HORIZONTAL Sweep Vernier Control (25) is in the CAL position
(fully cw), the horizontal sweep speed (see Table 5-5) is divided by a
factor of one (1). As the control is turned ccw, the horizontal sweep
is divided by a factor of from one (1) to ten (10).
5-19
04