User's Manual

Preparing for Alignment

Horizon Compact Release 1.01.01 Wireless Ethernet Product User Manual – Volume 1

BNC field strength

connector

Voltmeter probes

connected to BNC

connector

BNC to banana

jacks cables are

available from your

voltmeter dealer,

or can be

constructed by the

user.

9.1 Received Signal Level (RSL) Measurements

To accurately align the Horizon Compact to its far end peer, you need to monitor the received signal level

(RSL). There are two recommended methods for monitoring RSL. These are:

1. Use the CLI command set alignment on to activate the alignment feature at the BNC

connector located on the side of the unit. Connect a voltmeter to the BNC connector.

The voltage at this connector is linearly related to RSL and is 1 mV per dB e.g. -45 mV

= -45 dB. Note that the centre connection on the BNC connector is positive, so to read

negative values (to correlate with the negat ive RSL values) connect the negative pole

of the voltmeter to the centre connection.

Figure 9-2 Voltmeter connections to BNC field strength monitoring connector

2. Alternatively, readings can be made remotely via the Web interface, using the Tools –

Link Alignment menu option. An operator would then have to continually relay RSL

readings, via a radio or cell telephone, to the rigger adjusting the positioning of the

system.