BIRD Site Analyzer SA-2000, Operating Instructions Manual

Page: 98 / 124

Bird Site Analyzer
88
Calibrating the Bird 5011
The Bird 5011 is a highly accurate terminating power
sensor. Over time, the sensor’s “zero value” (reading
with no applied RF power) can drift, making all
readings inaccurate by this value. For example, if the
zero value is –2 µW, measuring a 5 mW signal will
give a reading of 4.998 mW, a 0.04% error. Measuring
a 50 µW signal will give a reading of 48 µW, a 4%
error. To keep this drift from causing a significant
error, rezero the sensor as necessary.
☞
NOTE: For best results, make sure the sensor has
been connected to the Site Analyzer and the SA
turned on for at least 5 minutes. Do not apply RF
power to the sensor during calibration.
CAUTION
When using a Bird 5011, do not exceed 2 W average
or 125 W peak power for 5 µs. Doing so will render
the sensor inoperative.
Press from
Measure
Power Mode
Press to
begin the
calibration
Fwd 0.00 mWatts
Offset
12.00
FullScale
Measure Power Mode
Configuration Screen
Recall
Setups
0.00 dB
0.01 Watts
Calibrate
5011
This will take about 45
seconds to complete. Do
you wish to continue?
[Enter/Esc]