Agilent Technologies 8719ES User Manual page 150

Making Mixer Measurements (Option 089 Only)
Conversion Loss Using the Frequency Offset Mode
5. To perform a one sweep power meter calibration over the RF frequency range at 0 dBm
(−10 dBm for 8722ES), press:
Cal PWRMTR CAL
(or on 8722ES:
0 x1
Because power meter calibration requires a longer sweep time, you may want
NOTE
to reduce the number of points before pressing
power meter calibration is finished, return the number of points to its original
value and the analyzer will automatically interpolate this calibration.
6. Make sure the power meter calibration is on. When the power meter calibration is on,
"PC" is displayed at the left edge of the display. Refer to
example.
7. From the front panel of the analyzer, set the desired IF start and stop frequencies by
pressing:
INSTRUMENT MODE
System
100
Start
Note that these are the example IF start and stop frequencies. Enter the IF
start and stop frequencies for your measurement instead.
8. To calibrate the R channel over the IF range, connect the equipment as shown in Step 2
of Figure 2-11.
NOTE An error message will be displayed while the R In port is disconnected.
Ignore this error message until R In port is reconnected.
9. Press
Cal CALIBRATE MENU RECEIVER CAL
TAKE RCVR CAL SWEEP
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 (−10 dBm for 8722ES).
10. Save the power meter and receiver calibration to an instrument state by pressing
SAVE STATE
Save/Recall
2-16
ONE SWEEP
−10
)
x1
FREQ OFFS MENU
350
M/µ Stop
.
.
TAKE CAL SWEEP
TAKE CAL SWEEP
Figure 2-15 on page 2-19
M/µ
0 x1
. After the
for an