Making An Average Power Measurement - Deviser SitePROFILER User Manual

11-1

Making an Average Power Measurement

The following is a step-by-step guide for conducting an Average Power measurement in Inline High Power
Meter mode. Average power describes the mean power delivered over several cycles. The analog power
meter display will depict the forward power reading, or what is being transmitted; the reverse average
power depicts the reflected power reading. A high reverse power reading could indicate impedance
mismatch issues. Check the channel and transmitter settings.
Procedure:
1. Tap the Measurement main menu softkey to open the Measurement menu on the right side of the
display. Select Average Power.
2. Tap the Frequency main menu softkey. Under the Frequency submenu, set your desired center
frequency. There are two ways to accomplish this.
a. Manually enter the desired start frequency by tapping Center Freq and using the arrow
keys, data keypad, or rotary knob to adjust. Press Enter to confirm.
b. Open the Signal Standard submenu and tap Select Signal STD. Double-tap your preferred
signal standard on the list to select it and return to the submenu, then select the signal type
by tapping Uplink or Downlink. Set a specific channel of interest to test, or enter a Ch Step
of 1 to test all available channels.
3. Tap the Amplitude main menu key. Use the Max and Min softkeys, along with the arrow keys, rotary
knob, or data keypad, to adjust the amplitude range to display on the on-screen power meter..
You can also tap Auto Scale to set the max and min values to where the current measurement is
easily visible, or Full Scale to display the entire measurement range.
a. Adjust Ref Offset, if necessary, to compensate for external input attenuation or gain.
b. Remember to select the appropriate measurement units.
4. Tap the Sweep main menu key and open the Sweep submenu. Set Sweep Type to Cont for
continuous measurement, or Sngl for a single sweep.
5. Still in the Sweep main menu, open the Average submenu. Toggle Averaging On to activate the
per-sweep averaging function, where the measurement displays the mean data of numerous
sweeps (as determined by the AVG Factor). Use to obtain stable readings from an erratic signal.
6. If the instrument is properly connected and configured, the yellow needle on the display will swing
to indicate the forward average power reading. The reverse average power will appear in a small
numerical pane below.
7. You can toggle Max Hold to the left of the display (or in the Sweep menu) to freeze the reading at
its highest measured level.
8. The red and green regions on the meter display indicate limit lines. Tap the Limit main menu key to
adjust your upper and lower limits for pass/fail testing. Enable Limit Alarm for an audio failure cue.
Saving the Measurement:
When you have conducted a successful measurement and wish to save the results for later viewing or
analysis, press the Save button to the top-right of the display. Power meter measurements will save as .PMM
files. For more details on naming and saving files to the instrument or USB, see Section 17-2.
E7000L SitePROFILER
Handheld Cable/Antenna Analyzer
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