2 Making Measurements
26 U2000 Series Operating and Service Guide
Speed and Averaging
The same signal also requires a specific consideration of the measurement
speed. As shown above, in auto- ranging mode the U2000/1/4A sensor
determine the average power level is below –10 dBm and select the low power
path. With auto- averaging configured, minimal filtering is applied. Values of
one to four for average power levels above –20
dBm are used in the low power
path. (Refer to
“Auto- Averaging Settings” on page 23.)
If the range is held in “UPPER” for more accuracy, the measurement is slower.
More filtering is applied due to the increase in noise susceptibility at the less
sensitive area of the high power path. Values of one to 128 for average power
levels less than –10
dBm are used. (Again, refer to “Auto- Averaging
Settings” on page 23.) Manually lowering the filter settings speeds up the
measurement but can result in an unwanted level of jitter.
Summary
Attention must be paid to signals where the average power levels are in the
low power path range while the peaks are in the high power path range. You
can achieve best accuracy by selecting the high power path or achieve best
speed by selecting the low power path.
To Next Page
Loading...
Need help?
General
