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the first row and display the current temperature on the second
row.

18.3

Excessive VSWR

A sensor positioned after the Low Pass Filter section
measures the level of forward and reflected power on the
antenna. The microprocessor calculates the VSWR and is used
to protect the amplifier from excessive dissipation in this case.
The amplifier operates at it’s best when the VSWR is below
1.5:1. If the VSWR increases above 1.5:1 to 2.0:1 the
microprocessor introduces a level of ALC necessary to maintain
the output power at a safe level. Above 3.0:1 an audible error
tone will be emitted and the

(

par.4) warning LED will

illuminate. If the level of VSWR increases above 3.0:1 the
amplifier will be shut down. The audible warning will continue
and the warning LED will remain on. To reset the amplifier it will
be necessary to switch the amplifier off and back on. In this
case the LCD display will show:

ERROR SWR >3.0

on the first

row.

18.4

FILTER FAULT

The band pass filter PCB is controlled and monitored by the
microprocessor in order to verify the correct filter is selected. If
the current filter is incorrect or has a problem during use the
processor will signal an error.

18.4.1

Excessive Harmonic SWR

If on the input to the filter section the microprocessor

sees a high SWR it is possible that the filter selection is
incorrect or that there is a problem between the amplifier and
antenna. In this case the SWR is above 3.0:1 the operation of
the amplifier is outside of its safety limits and will sound the
audible alarm and illuminate the

(

par.4) warning LED. The

LCD will display:

Harm. SWR >3.0

8.5

Error Frequency

If the input frequency is outside of the specified limits, the
amplifier will shut down , an audible tone will be emitted and the
LCD will display 'Error Frequency'

19. Warranty

RM Costruzioni Elettroniche S.n.c. Guarantees

that the

product is free from manufacturing defects both component and
workmanship for a period of time specified by the law. The
warranty commences on the date of purchase. Any work
undertaken for the warranty must be carried out by RM Italy or
an authorised RM Italy service centre

The costs of

transportation, duties and insurance between the purchaser and
RM Italy or an RM Italy approved service centre are the
responsibility of the purchaser, both to and from the service
centre.
The warranty must be requested to the distributor or reseller
where the amplifier was originally purchased.
In the case where the original distributor or reseller no longer
exits or no longer deals with RM Italy products RM Italy will
communicate the nearest distributor or reseller to use, or in the
instance where this is not possible/convenient, RM Italy will
honour the warranty directly. If any repairs are carried out
outside of an approved RM Italy service centre this will void the
original warranty and RM Italy will not be responsible for any
incurred charges.

The warranty will only be honoured if the amplifier has

been used for it's intended purpose as described in the
operation manual and it is returned with the original purchase
receipt, that the amplifier is transported in the original packing
container, that the serial number is unchanged and readable
and that the warranty labels remain intact.

The warranty does not cover the Mosfet power transistors or
any aesthetic damage.
Any change to the warranty either by local law or that made by
the distributor or reseller directly with the purchaser will be the
sole responsibility of the distributor or reseller and not by RM
Italy.
In the event of any argument between parties resulting in legal
action. It will be agreed to be settled in a court in Bologna
(Italy).
The purchase of this product assumes that the purchaser has
accepted the terms and conditions of this warranty.

-15-

Nr Protezione

Cause

Display

Reset

LED Note

OVER Input

Power

Input Power > 13W

Power TRX >13W

No Action

Reduce transmitter power /
Adjust correctly ALC