Radio Loopback - RACOM RAy3-11 User Manual

A very useful tool for identifying in-band interference and locating a free channel. It is not a full-blown
spectrum analyzer as it scans the spectrum with 2 MHz channel resolution. The accuracy of measured
results is given by the accuracy of measuring RSS.
Enable
Opening analyzer functions.
Start
Interrupts communication on the link and starts scanning frequencies in the band.
Spectrum measure time
Selection of measurement length in range:
Mute peer TX
The deactivation of Peer station transmission during measurement. single sweep ... up to 15 min
Note
Single sweep takes about 2 seconds for the whole band scan in 17 or 24 GHz (only 200-250
MHz wide). For licensed bands it takes adequately longer - according the width of RX and TX
parts of the band.
The link is automatically re-established after it is finished.
Warning
Running spectrum measurement causes interruption of user data flow between stations!
Interruption of the scan before selected measure time can be achieved anytime by visiting any of the
Link menu settings and select Refresh. This restores the configuration connection (message Peer:
n/a).

5.6.2.4. Radio loopback

Fig. 5.46: Menu Tools > Live Data > Radio loopback
Radio loopback measurement serves as a check of quality of the antenna connection to the microwave
unit and the quality of the antenna itself. Only available for the 17 GHz and 24 GHz units. The function
provides indicative measurement of an antenna parameter CPI (Cross-Port Isolation). It is done by
evaluation of strength of the signal in other (RX) polarization received from its own transmitter (trans-
© RACOM s.r.o. – RAy3 Microwave Link
Configuration
161