Tektronix H600 RFHawk, Руководство по обслуживанию, Страница: 35 / 109

Performance Veri fi cation
Check Phase Noise This test determines the phase noise of the H600 or SA2600 under test. The
Signal Generator used in the test should have signi
fi cantly less phase noise than
the H600 or SA2600 under test.
NOTE.
The peak detector is used to measure narrowband signals such as the
CW signal from the signal source and the average detector is used to measure
wideband signals such as noise
fl oor.
Signal Generator setup.
1. Reset the signal generator.
2. Set the frequency to 100 MHz (center frequency).
3. Set the output power level to +10 dBm .
4. Connect the RF cable from the signal generator output to the H600 or SA2600
under test
RF INPUT connector.
H600/SA2600 setup.
1. Disconnect the cable from the H600/SA2600 FREQ REF connector if present.
2. Select Tools > Factory Reset
3. Tap Reset All .
Phase noise veri fi cation.
Do the following steps from the H600/SA2600:
1. Tap the Spectrum drawer.
2. Tap the More button in the Spectrum drawer.
3. Tap the Freq/Span tab and set Span to 100.000 kHz and Center Freq to
100.000 MHz .
4. Tap the Trace tab and set the following:
Type to Average
Number of Averages to 20 (default)
Detector to +Peak
5. Tap the AutoLevel button.
6. Tap the Meas Freq marker readout box (just above the Windows CE Start
button) to set the red measurement triangle as the selected (active) marker.
The application also updates the Marker-To button in the Spectrum drawer
to show the red measurement triangle icon, indicating that the Marker-To
button will act on the Meas Freq marker.
H600 & SA2600 Service Manual 1–17