TB 9-6625-2363-35
(a)
Preset.
(b)
Frequency, 1, [GHz].
(c)
Amplitude, 1, 0, [dBm].
(d)
MENUS Pulse, [Pulse Source], [EXT2 DC-Coupled].
(e)
[Pulse Off On] to On.
(f)
RF On/Off to RF on.
(4) 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, [GHz].
(d)
SPAN, 1, ., 5, [MHz].
(5) Press spectrum analyzer pushbuttons as listed in (a) through (j) below:
(a)
BW Avg, [Res BW], 1, 0, 0, [kHz].
(b)
[Video BW], 1, [kHz].
(c)
MARKER.
(d)
SPAN, 0, [Hz].
(e)
Sweep, [Sweep Time], 3, 0, [ms].
(f)
Trig, [Video], 1, 0, [-dBm].
(g)
Marker.
(h)
Using rotary knob, adjust marker to top of square wave.
(i)
Marker, [Delta].
(j)
Using rotary knob, adjust delta marker to bottom of square wave.
(6) Using spectrum analyzer, measure top to bottom of square wave in dB. Pulse
on/off ratio will indicate within limits specified in table 8.
Spectrum analyzer
>dB
80
(7) Set TI frequency and spectrum analyzer center frequency to 3.5 GHz.
(8) Repeat technique of (5) (g) through (6) above. Pulse on/off ratio will indicate
within limits specified in table 9.
Spectrum analyzer
>dB
60
(9) Reduce all outputs to minimum and disconnect equipment setup.
b. Adjustments. No adjustments can be made.
12