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

HC2

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User Manual

Rev. 1.1L - 07/07/03

general refer to these external devices.

As soon as the HC2 is supplied, verify that the ON LED is lit. The LCD display
shows a presentatio screen, and after a few seconds it will pass to the default
screen, showing the values of the forward and reflected power.

Switch the exciter on (at its minimum power level) and wait for it to lock on the
working frequency. When the PLL has locked, progressively increase its output
power, while controlling the displays of the exciter, of the amplifiers and of the
hybrid coupler. Keep increasing the exciter output overall output of the combiner
reaches the desired value, that is at most the nominal power rating of the
transmitting station.

At this point, it is possible for the user to verify all the working parameters of the
amplifier using the management software.

Normally, the device doesn’t require any human supervision for its normal operation.
If any alarm condition arise, these are automatically managed by the embedded
protection system, and notified to the user with the LEDs on the panel or via
messages on the LCD display.

5.3

Software

This chapter describes  the way the microprocessor system controls the hybrid
coupler, and how the user can interact with it.

Note that the user can give commands to the device only when it's set in LOCAL
mode using the switch on the front panel. Otherwise, the user will only be allowed
to read the parameters, but not to change any of them.

The management of the HC2 is performed by a generic software used in different
classes of equipment produced by R.V.R. Elettronica SpA, like the HC combiners
or the RF amplifiers PJ500M-C and PJ1000M.
For this reason, some options that are related to other kinds of devices are
deactivated in the software version that is installed in the HC2 (see for example
the P.A. menu).

Note that some of the parameters that are measured and can be read may be, in
some circumstances, not available. This situation mostly arises when, for physical
reasons, the measured values are not significant to be used in the control software.

When the value for a parameter is not available for such reasons, it's substituted
with the symbol “==”.

Figure 5-1 shows the complete flow diagram  of the management software of the
coupler, that can be basically seen as build up of a default screen, plus a series of
submenus.

At power on, the LCD display will show the following presentation screen, indicating
the name of the device: