Black Box MWU2000-X21 - Manual (Page 38)

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2.048Mbps Wireless Modem
SALES: 0118 965 5100
2. Loosen the screws on the U-bolt that fasten the receive antenna to the mast (or the bolts on
the wall mount) and slowly move the antenna up and down (elevation) and from side-to-side
(azimuth) until you receive a maximum RSSI reading on the DVM. (See Figure 2-15).
3. Tighten the screws on the U-bolt (or the bolts on the wall mount).
Figure 2-15. RSSI test point accuracy.
⇒ To fine-tune the antenna alignment using a DVM near the receive antenna:
The modems can be configured send a DC signal through the RCV antenna connector. This
signal is proportional to the RSSI voltage, which is present at the RSSI output on the rear
panel.
1. Set a Bias-T connection before the Receive Antenna.
Figure 2-16. A Bias-T connection for RSSI measurement near the Receive Antenna
2. Set the jumpers in the Receive module of the 2.048Mbps Wireless Modem to the RSSI position.