TB 9-6625-2329-35
(11) Press spectrum analyzer pushbuttons as listed in (a) through (d) below:
(a)
Preset.
(b)
AMPLITUDE, Ref Level, 1, 0, dBm.
(c)
(d)
SPAN, 1, MHz.
(12) Press SHIFT, PARAMETER-SPECIAL pushbutton, enter DATA 19
numerical value, and press ENTER/UNITS mV key.
(13) Press spectrum analyzer pushbuttons and adjust controls as listed in (a) through
(j) below:
(a)
BW/Avg, Res BW, 1, 0, 0, kHz.
(b)
Video BW, 1, 0, 0, kHz.
(c)
MARKER.
(d)
SPAN, 0, Hz.
(e)
SWEEP, Sweep Time, 5, 0, mS.
Trig, Video, 1, 0, -dBm.
(f)
MARKER.
(g)
(h)
Adjust rotary control to place Mkr1 at top of square wave.
(i)
MARKER, Delta.
(j)
Adjust rotary control to place Mkr∆ at bottom of square wave.
(14) Using spectrum analyzer, measure top to bottom of square wave in dB. Pulse
envelope on/off ratio will indicate within limits specified in table 29.
Spectrum analyzer
> dB
70
(15) Press SHIFT, PARAMETERSPECIAL pushbuttons, enter DATA 20
numerical value, and press ENTER/UNITS mV key.
(16) Press PARAMETERRF pushbutton, enter DATA 1000 numerical value, and
press ENTER/UNITS MHz key.
(17) Press spectrum analyzer pushbuttons as listed in (a) through (d) below:
(a)
Preset.
(b)
AMPLITUDE, Ref Level, 1, 0, dBm.
(c)
(d)
SPAN, 1, MHz.
(18) Press SHIFT, PARAMETERSPECIAL pushbuttons, enter DATA 19
numerical value, and press ENTER/UNITS mV key.
(19) Press spectrum analyzer pushbuttons and adjust controls as listed in (a) through
(j) below:
30