CALAMP WIRELESS NETWORKS INC. MCUA5R Manual Do Utilizador

zero, but values up to about 15% of Forward
Power may be encountered in properly operating
systems.

A reverse power reading above zero is an indi-
cation that the antenna, feedline or connectors
are damaged, corroded or improperly tuned.
This creates standing waves that are reported as
a Standing Wave Ratio (SWR).

The table below, based on a forward power of 5
watts (it may be scaled for lower power settings)
gives guidelines to interpreting these figures:

1:1

0

ideal situation

1.5:1

0.2

normal operation

2:1

0.6

should be investi-
gated

3:1 or

greater

1.25 or
greater

defective antenna,
feedline or connec-
tors.

In the case that the values returned by the built-
in diagnostics seem to indicate a problem, we
recommend verification by means of proper ra-
dio shop equipment.

This is the number of good received data trans-
missions out of the last 15.

The receive quality indicator value returned by
any remote unit to the master station is an indi-
cation of the reception quality on the outbound
path.

If the master station is monitored, either from a
remote station or by using a local GET STATS,
users should note that the receive quality indi-
cator thus returned is a composite value which
represents the average reception from the last 15
remotes. Any significant drop in the receive
quality indicator returned by the master station
is therefore likely to indicate a problem with the

master station receiver itself, rather than any one
remote station.

Offline diagnostics are returned in response to a
specific request to a particular station. Requests
are issued using the Integra RDS, either locally
or remotely from another station. This may
cause slight temporary network disruption.

The diagnostic information available is similar
to that available from online diagnostics with
the following additions:
Demodulated signal voltage: peak-to-peak
Analog 1 input voltage: 0 – 10 V in tenths
Analog 2 input voltage: 0 – 10 V in tenths
Reverse power: tenths of a watt rather than a

good / poor flag.

Note: Analog 1 and 2 have 8 bits of resolution.