R.V.R. Elettronica HC2 LCD, User Manual

HC2

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User Manual

Rev. 1.1L - 07/07/03

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Detection of user-settable attention thresholds (e.g. output power being below
a certain value), that are made externally available as digital states on the
"telemetry" connector

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Communications with external devices

The management software of the HC2 is based on a menu system.
The user can navigate through the menu system using four buttons, ESC, move
LEFT/UP, move RIGHT/DOWN and ENTER. A fifth button is used to reset the
alarm counters, if any alarm has been triggered before.

Five LEDs on the front panel of the amplifier show the current status of the machine:
ON/OFF, WAIT, FAULT, LOCAL and FOLDBACK

A switch on the front panel allows to select the LOCAL or REMOTE working mode:

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LOCAL mode allows to control the machine using the buttons on the front
panel, while remote control (that is using the telemetry connector) is disabled;

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In REMOTE mode, remote control is enabled, while the buttons on the front
panel can be used only to read parameters and not to change them

The LOCAL working mode is signalled by a yellow LED on the front panel being
lit.

The different working parameters are made available for the remote control
applications on the telemetry connector, as voltage levels that are proportional to
the value of the parameter under consideration. Digital output signals related to
alarms or warnings are also present on the connector, together with the digital
input like ON/OFF switching or alarms reset.

The hybrid coupler includes an input for optional external 24 V dc power supply.
This power source will automatically be used to supply the CPU section in case
the mains power goes off. In this way, it is possible to interact (locally or remotely)
with the device even in absence of mains supply.

The HC2 can be connected to the exciter of the transmitter using a “interlock”
cable, so that it is possible for it to deactivate RF power emission in case of
misfunctioning of the transmitting system. An analogous effect can be reached
also in case the exciter misses the interlock functionality, connecting the mains
supply of the exciter to the auxiliary mains plug of the HC2 “AUX OUT AC LINE”.
This plug is in fact opened using a relay under the same conditions that cause the
activation of the interlock.