11-3 HAPM Operation Procedure Chapter 11 — High Accuracy Power Meter
11-4 MS20xxA VNA Master UG 10580-00166 Rev. C
Changing the Scale of the Analog Display
1. Press the Amplitude key.
2. Press the
Auto Scale soft key to align the needle in the middle of the analog display. The
maximum and minimum values align accordingly.
3. Press the
Max soft key and use the numeric key pad to manually set the maximum value
of the analog display.
4. Press the
Min soft key and use the numeric key pad to manually set the minimum value
of the analog display.
Using Attenuators
1. Press the Amplitude key and select the Enter Offset soft key.
2. Enter the offset value for the attenuator at the frequency of operation.
Displaying Relative Power
1. Press the Amplitude key.
2. With the desired base power level input to the sensor, press the
Relative soft key. The
power reading will show 0 dB and 100%. If measuring a 10 dBm signal, and if the
Relative key is selected, then a drop to 7 dBm will show as –3 dB and 50%.
Averaging/Max Hold/Run Hold
1. Press the Average key.
2. Press the
Running Averages key. Use the numeric keypad to enter the desired number of
averages.
3. Press the
Max Hold soft key to toggle between Max Hold On and Max Hold Off. If averaging is
selected, then
Max Hold will display the maximum value of the non-averaged data.
Limits
1. Press the Limit key.
2. Press the
Lower Limit soft key. Enter the lower limit value in dBm or in Watts.
3. Press the
Upper Limit soft key. Enter the upper limit value in dBm or in Watts.
4. Press the
Limit On/Off soft key to turn the Limits on and off. The number display will turn
green or red if the measurement is passing of failing.
5. Press the
Amplitude key and select the Units soft key to change between dBm and Watts
Note
With no offset, the maximum value for the display is the upper measurement
range, which is +20 dBm. With an offset, such as with 10 dB of attenuation, the
upper value can be set to +30 dBm. With an offset of xx dB, the upper value can be
set to +20 dBm plus xx dB.
10580-00166C.book Page 4 Thursday, February 21, 2008 12:52 PM
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