Tektronix H600 RFHawk, Руководство по обслуживанию, Страница: 36 / 109

Performance Veri fi cation
7. Tap the down arrow button next to the Marker-To button and select Marker
to max peak . Then tap the down arrow button next to the Marker-To button
again and select Marker to center freq to move the peak of the test signal
to the center of the display.
8. Verify that the Span is still 100 kHz and the Meas Freq marker box and center
frequency readouts are both 100 MHz .
9. Write down the level of the signal as shown in the Meas Freq marker readout
box; this is the carrier level value
L
c
.
10. Tap the Trace tab and set the following:
Type to Average
Number of Averages to 100
Detector to Avg (VRMS)
11. Write down the center frequency.
12. Tap the M1 marker readout box on the bottom of the screen to open the M1
input control.
13. Tap the keypad icon in the M1 control and enter the center frequency
minus 10 kHz (offset). For example, a minus 10 kHz offset for 100 MHz
is 99.990 MHz.
14. Tap the M2 marker readout box on the bottom of the screen to open the M2
input control.
15. Tap the keypad icon in the M2 control and enter the center frequency
plus 10 kHz (offset). For example, a plus 10 kHz offset for 100 MHz is
100.010 MHz.
16. Determine the total sideband noise level:
a. Tap the Reset display-control button (the X button located along the right
side of the waveform plot) to reset the measurement, then wait until the
instrument averages the 100 measurements.
b. Write down the M1 marker value; this is the lower sideband noise level
LN
ssb1
.
c. Write down the M2 marker value; this is the upper sideband noise level
LN
ssb2
.
1–18 H600 & SA2600 Service Manual