Measure Power Mode
121
sures power across its entire frequency range. Its
diodes operate in their ‘square law’ region so that the
detector output is directly proportional to the average
power, without any additional error correction.
VSWR
VSWR measures the relation between forward and
reflected average power. The Bird Wideband Power
Sensor calculates the VSWR from the Forward and
Reflected Average Power measurements. Rho and
Return Loss are also the same measurement, but in
different units:
, ,
and
Video Filter
Except for average power and VSWR measurements,
all WPS measurements rely on a variable video filter to
improve accuracy. This filter can be set to either
4.5 kHz, 400 kHz, or full bandwidth. It should be as
narrow as possible while still being larger than the
demodulated signal bandwidth (video bandwidth).
Narrowing the filter limits the noise contribution
caused by interfering signals. Listed below are some
common modulation schemes and the appropriate
video filter.
Average and Peak
Envelope Power
Square Wave
Signal
Average Power
Peak Envelope Power
0 W
50 W
100 W
Summary of Contents for SITE ANALYZER SA-1700EX
Page 2: ...This page is not blank...
Page 8: ...Bird Site Analyzer vi...
Page 9: ...vii...
Page 30: ...Bird Site Analyzer 16...
Page 142: ...Bird Site Analyzer 128...
Page 148: ...Bird Site Analyzer 134...
Page 159: ...Maintenance 145 Measured Return Loss dB...
Page 167: ...Maintenance 153 the number of data points you wish measure 238 475 949...