TB 9-6625-2329-24
Period and enter 10 m/kHz.
(b)
Width and enter 5 m/kHz.
(c)
Vhigh and 5 ENTER/Hz.
(d)
Vlow and 0 ENTER/Hz.
(e)
Delay and enter 0 n/GHz.
(f)
2 Pulse and OFF ENTER/Hz.
(g)
DISABLE red light (on) on the 9211 output module.
(h)
(3) Press TI pushbuttons as listed in (a) through (c) below:
(a) SHIFT INSTR PRESET.
(b) PARAMETERRF, enter DATA 150 numerical value, and press
ENTER/UNITS MHz key.
(c) PARAMETERLEVEL, enter DATA 10 numerical value, and press
ENTER/UNITS dBm key.
(4) Press DISABLE red light to off on pulse generator 9211 output module.
(5) Press spectrum analyzer pushbuttons as listed in (a) through (d) below:
(a) Preset.
(b) AMPLITUDE Ref Level, 1, 0, dBm.
(c) FREQUENCY Center Freq, 1, 5, 0, MHz.
(d) SPAN, 1, MHz.
(6) Press SHIFT, PARAMETER SPECIAL pushbutton, enter DATA 19
numerical value, and press ENTER/UNITS mV key.
(7) Press spectrum analyzer pushbuttons and adjust controls as listed in (a) through
(j) below:
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)
(8) Using spectrum analyzer, measure top to bottom of square wave in dB. Pulse
envelope on/off ratio will indicate within limits specified in table 28.
Table 28. Pulse Modulation On/Off Ratio
Spectrum analyzer
(>dB)
70
(9) Press SHIFT, PARAMETERSPECIAL pushbuttons, enter DATA 20
numerical value, and press ENTER/UNITS mV key.
26