The Point-to-Point Diagnostics Utility
Running Point-to-Point Diagnostics
WaveLAN/ISA Card User’s Guide
5-7
Signal Quality
5
Signal Quality is an indication of the “clarity” of signals
received. This can be affected by the number and
position of radiofrequency reflecting surfaces (such as
exposed steel structural components of some buildings)
in the environment of the signal path.
PC Positioning
5
The Signal Quality and SNR displays give you an
opportunity of interactively finding the best station or
antenna placement, by watching the display as you try
out various positions.
Some environments can cause pockets of reduced Signal
Quality to occur in an unpredictable way. A small
relocation of the computer or antenna is often enough to
give a significant improvement.
If SNR is low (<20) and Signal Level is high, the antenna
is too close to a local noise source.
Action:
Relocate the antenna and/or the station, or
eliminate the local noise source.
If SNR is low and Signal Level is low (<20), the problem
is most likely signal attenuation caused by antenna
shielding or stations too far apart.
Action:
Remove shielding or relocate the antenna
and/or the station.
Logging the
Measurement Data
5
Press Function Key [F2] to save the measurement data to
a log file. You can choose between “Spreadsheet
compatible” (Comma-Separated Value or CSV) or ASCII
file format. An example of measurement data saved in
ASCII format is shown in Figure 5-3 on page 5-8.
You can append data to an existing file or save to a new
file, and you can choose to save the data once only or at
regular intervals during the test.
isa-src.bk : isa-ch5.frm Page 7 Monday, October 14, 1996 1:23 PM
