BIRD SignalHawk SH-36S-RM-ASL, Руководство по эксплуатации, Страница: 131 / 195

Measurements
117
Field Strength Measurement
Field Strength measures the signals reaching an antenna. The SignalHawk automatically
corrects the sweep data for the antenna's gain and frequency dependence and displays it in
dBm / m.
Field Strength measurement Setup
The Field Strength Measurement can be turned on using the Start Menu or the Measure Menu .
1. Connect an antenna to the RF In connector on the SignalHawk.
NOTE
Use an antenna with known gain characteristics. For best accuracy, set the start and
stop frequencies to the measurement range of the chosen antenna.
2. Click on the Measure Menu button ( 3 ). See Field Strength Measurement Figure .
3. Click on Field Strength: Menu Button.
4. If measurement is not already on, Click on Field Strength: On/Off option ( 1 ) to turn on
measurement.
NOTE
Underlined option is the active option.
5. Click Antenna option ( 2 ) and select the antenna type from the drop down list.
NOTE
The antenna type, valid frequency range, and gain in dB (relative to an isotropic
radiator) are shown in the measurement settings area.
6. Measure the strength of the signal emanating from a transmission antenna (within the
frequency range of the antenna connected to the RF In port).
7. Move to various positions relative to the transmitting source and observe the signal
value.