Bird Technologies AT-800-Manual - Manual (Page 38)

Bird AT-800 Antenna Tester
20
Single Frequency mode displays the measurement on
a simulated analog meter. This mode is useful when
tuning an antenna, especially with audio on.
Figure 6 Single Frequency
Band Selection Presets vs. User Defined
In swept frequency mode, band presets ensure the
antenna system is tested at the correct frequencies.
Selecting transmit (Tx), receive (Rx), or both (TxRx)
automatically sets start and stop frequencies for the
cellular system and base or mobile selections in the
utility menu.
Measurement Units
Rho (Reflection Coefficient), VSWR (Voltage Standing
Wave Ratio), Match Efficiency (%), and Return Loss
(dB), are different units that present the same infor-
mation. (Similarly, Celsius and Fahrenheit are differ-
ent units of measurement for the same temperature).
They describe the match quality between an antenna
system and a transceiver.
AMPS
Mobile
VSWR
1.2 1.5
1.35
858.27 MHz
Freq
MHz Units Manual
Scale Auto
Scale Audio
Off