Bird Technologies SA-6000XT-Manual - Manual (Page 62)

46
Zeroing Bird Power Sensors
Over time, the sensor’s “zero value” (reading with no applied RF power) can
drift, making all readings inaccurate by this value.
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. Peri-
odically re-zero the sensor.
Note: This applies to TPS and WPS power sensors.
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.
Figure 38 Zeroing, Message 1
CAUTION
When using terminating power sensors 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