NOTE: The channel number is not required because the cal factor frequencies
are rounded to the nearest 500 MHz.
Step 8.
With no power applied to the sensor, press the AMPLITUDE key then the
Zero
soft key to zero the sensor. Zeroing the sensor is recommended when making
power measurements below –20 dBm.
Using Attenuators
Step 9.
Press the AMPLITUDE key and select the
Offset dB soft key.
Step 10. Connect the phase stable cable and the attenuator between the DUT and the sen
-
sor.
Step 11. Enter the combined offset value of the attenuator and the pad, or select the
Mea
-
sure Offset
soft key to use the Offset Cal Kit (65701) to measure the offset. See
page 6-2 for more details.
Averaging/Max Hold/Run Hold
Step 12.
Press the MEAS/DISP key.
Step 13. Press the
Running Averages soft key and use the keypad to enter the number of
averages to use (up to 50).
Step 14. Press the
Max Hold soft key to display the maximum value. If Averaging is se-
lected, Max/Hold will display the maximum value of the non-averaged data.
Step 15.
Press the RUN/HOLD key to hold the display in the current condition.
Setting Limits
Step 16.
Press the MEAS/DISP key.
Step 17. Press the
Limit Units soft key to select the units.
Step 18. Press the
Lower Limit soft key and enter the lower limit value in dBm or in
Watts.
Step 19. Press the Upper Limit soft key and enter the upper limit value in dBm or in
Watts.
Step 20. Press the
Limit ON/OFF soft key to turn on the limits. The number display will
turn green if the measurement is passing, or red if the measurement is failing.
The word
PASS or FAIL will also be displayed in between the logarithmic and
linear display windows.
Displaying Relative Power
Step 21.
Press the AMPLITUDE key.
Step 22. With the desired base power level input to the sensor, press the
Rel soft key. The
message area will show
Relative On and the power reading will show 0 dB and
100%. If measuring a 10 dBm signal with the
Rel key selected, a drop to 7 dBm
will show –3dB and 50%.
Saving the Measurement
Step 23.
Press the SAVE DISPLAY key.
Step 24. Use the soft keys to enter a Trace Name.
Chapter 8 High Accuracy Power Meter
8-3
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