Tektronix RSA3408, Руководство по обслуживанию

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Performance Tests
3- 42
RSA3408B Analyzer Service Manual
g. Modify the generator output level:
H
Press Markers:
A
or
"
to place the marker on the signal of
1999.85 MHz.
H
Adjust the generator (Item 2) output level so that the signal level is
--10 dBm.
H
Press Markers:
A
or
"
to place the marker on the signal of
2000.15 MHz.
H
Adjust the generator (Item 4) output level so that the signal level is
--10 dBm.
2. Check the amplitude for the attenuation of 10 to 20 dB:
a. Modify the analyzer controls:
H
Press the Amplitude key on the front panel.
H
Press the RF Att menu item and set the attenuation using the general
purpose knob (initially 10 dB).
b. Measure the amplitude for the signals of 1999.55 MHz and
2000.45 MHz:
H
Press the
Marker Setup
key.
H
Press the Select Marker side key to select 1 .
H
Place the first marker at the signal of 1999.55 MHz using the
Markers:
A
or
"
key.
H
Press the
Select Marker
side key to select
2
.
H
Place the second marker at the signal of 2000.45 MHz using the
Markers:
A
or
"
key.
c.
Check against limits: Read the first and the second marker readouts.
Write down the larger value.
d. Repeat substeps 2a through c for attenuation from 10 to 20 dB in 5 dB
steps to find the lowest distortion value.
3.
Check against limits:
Confirm that the lowest value meets the requirement of --78 dBc.
4.
Disconnect the test equipment:
Disconnect the cable at the analyzer input.