TB 9-6625-2329-24
BW/Avg, Res BW, 1, 0, 0, kHz.
(a)
Video BW, 1, 0, 0, kHz.
(b)
MARKER.
(c)
SPAN, 0, Hz.
(d)
SWEEP, Sweep Time, 5, 0, mS.
(e)
Trig, Video, 1, 0, dBm.
(f)
MARKER
(g)
Adjust rotary control to place Mkr1 at top of square wave.
(h)
MARKER, Delta.
(i)
Adjust rotary control to place Mkr at bottom of square wave.
(j)
(20) Using spectrum analyzer, measure top to bottom of square wave in dB. Pulse
envelope on/off ratio will indicate within limits specified in table 30.
Table 30. Pulse Modulation On/Off ratio
Spectrum analyzer
> dB
50
(21) Press SHIFT INSTR PRESET pushbutton.
(22) Press PARAMETER LEVEL pushbutton and press ON/OFFOFF key.
(23) Press DISABLE red light on pulse generator 9211 output module to on.
(24) Press spectrum analyzer Preset pushbutton.
b. Adjustments. No adjustments can be made.
17. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.