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Chapter 2 45
Basic Operation
Configuring the RF Output
NOTE During swept RF output, the FREQUENCY and/or AMPLITUDE areas of the signal generator’s
display are deactivated, depending on what is being swept. In this case, since frequency
is being swept, nothing appears in the FREQUENCY area of the display.
7. Press Frequency > Freq CW.
The current continuous wave frequency setting now controls the RF output and ramp sweep is
turned off.
8. Press
Freq Start.
The ramp sweep settings once again control the RF output and the CW mode is turned off.
Pressing any one of the softkeys
Freq Start, Freq Stop, Freq Center, or Freq Span activates a ramp sweep
with the current settings.
NOTE In a frequency ramp sweep, the start frequency must be lower than the stop frequency.
9. Adjust the settings for Freq Center and Freq Span so that the frequency response of the device under
test (DUT) is clearly seen on the 8757D display.
Notice how adjusting these settings also changes the settings for the
Freq Start and Freq Stop softkeys.
You may need to rescale the response on the 8757D for a more accurate evaluation of the
amplitude. Figure 2-3 on page 46 shows an example of a bandpass filter response.