1-26
Supplement for the User’s Guide (Firmware Version 7.66)
Conversion Loss Using the Frequency Offset Mode
5. To perform a one sweep power meter calibration over the IF frequency range at 0 dBm,
press:
NOTE Because power meter calibration requires a longer sweep time, you may want
to reduce the number of points before pressing . After
the power meter calibration is finished, return the number of points to its
original value and the analyzer will automatically interpolate this
calibration.
6. To calibrate the R channel over the IF range, connect the equipment as shown in Step 2
of Figure 1-15 (or Figure 1-16) and press:
❏ The low pass filter is required to limit the range of frequencies passed into the R
channel input port. The filter is selected to pass the IF frequencies for the
measurement but prevent the LO feedthrough and unwanted mixer products from
confusing the phase-lock loop operation.
❏ A pad is used to isolate the filter and improve the IF port match for the mixer.
Once completed, the display should read 0 dBm.
Setting the Analyzer to the RF Frequency Range
1. While the analyzer is still set to the IF frequency range, set the frequency offset mode
LO frequency from the analyzer by pressing:
The LO menu is used to set only the LO CW frequency. All other settings apply when
using the HP/Agilent 8625A external source.
2. To select the converter type and a high-side LO measurement configuration, press:
3. Turn on frequency offset operation by pressing:
Notice in this high-side LO, down conversion configuration, the analyzer's source is
actually sweeping backwards, as shown in Figure 1-17.
The measurement setup diagram is shown in Figure 1-18 and Figure 1-19. Note the RF
frequency values are shown in this illustration.
Cal
0 x1
Cal
0 x1
System
1000 M/µ
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