Tektronix RSA3408B, Руководство по обслуживанию

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Performance Tests
3- 34
RSA3408B Analyzer Service Manual
d. Modify the default settings:
H
Press the Frequency/Channel key on the front panel.
H
The Center Freq menu item is selected by default.
Set the frequency to 100 MHz using the numeric keypad.
H
Press the Span key on the front panel.
H
The Span menu item is selected by default.
Set the span to 10 MHz using the general purpose knob.
H
Press the Amplitude key on the front panel.
H
The Ref Level menu item is selected by default.
Set the reference level to --20 dBm using the general purpose knob.
H
Press the
RF Atten/Mixer
side key to select
RF Att
.
H
The RF Att menu item is selected by default. Set the attenuation to
0 dB using the numeric keypad or the general purpose knob.
2. Measure the reference amplitude at 0 dB attenuation:
a.
Press the
Peak
key on the front panel to place the marker on the
signal peak.
b. Record the peak amplitude at the marker readout as the reference value.
(Let the value be P
0.
)
3. Check the amplitude for the attenuation from 5 to 30 dB:
a. Press the Amplitude key on the front panel.
b. Press the RF Att side key and set the attenuation (initially 5 dB).
c.
Press the
Peak
key on the front panel to place the marker on the
signal peak.
d. Record the peak amplitude at the marker readout. (Let the value be P
X
.)
e. Check that the error (P
X
-- P
0
) is within

0.2 dB.
f. Repeat substeps 3a through e for attenuation from 5 to 30 dB in 5 dB
steps.
4.
Modify the generator controls:
Amplitude --5 dBm . . . . . . . . . . . . . . . .