E7000L SitePROFILER
Handheld Cable/Antenna Analyzer
66
11-4
Making a CCDF Measurement
The following is a step-by-step guide for conducting a Complementary Cumulative Distribution Function
(CCDF) measurement in Inline High Power Meter mode. The CCDF measurement provides the percentage
of time the signal spends at or above a specific power level (with the power level expressed in units of dB,
relative to the average power level).
Procedure:
1.
Tap the
Measurement
main menu softkey to open the Measurement menu on the right side of the
display. Select
CCDF
.
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.
c.
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 of interest. 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. 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 CCDF reading will appear on the
instrument display.
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.
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.
