AT7120 Owner Manual Rev. 1.1
– March 2009 18/76
designation identifying the unity and software version. The unit contains firmware control software that
allows the operating system software to be updated as needed.
All the available analog parameter information from the system is sent to connector CON-9 on the
CIP8231 board. The parameters monitored and displayed are as follows:
Direct power – 120W Amplifier
Reverse power - 120W Amplifier
(+9V) - Power supply
(+18V) - Power supply
(-18V) - Power supply.
(+32V) - Power supply.
(I1) – the main power supply electrical current.
The analog signals are sent to microcontroller CI-4, where they are digitalized and processed. The
software of this microcontroller compares the readings with the stored nominal values. Readings
outside of nominal values generate associated alarms. Values and alarm states are displayed on the LCD
panel located on the front of the unit. Important note: The equipment is designed so that a nominal
analog reading pr4 volts DC to the Con-9 connector. The voltage level presented to Con-9 can
be adjusted during setup or maintenance when external equipment is used to assure proper calibration /
reading.
Each module that generates analog control / monitoring information has an associated test point on the
unit. If during the calibration process external measurements indicate the correct nominal value for that
function, a trimpot is adjusted to set the voltage on the test point to +4Volts.
Note: Set the voltage on the test point associated with reflected power, if the voltage becomes higher
than +4Volts, the control unit will process this event as an alarm. This event is associated with a reverse
power in excess of 10% of the transmit power.
Alarm detection
For the alarms listed below, the CIP8231 control unit board shuts down the transmission by Setting the
Automatic Level Control (ALC) to zero volts (provided to the up-converter module 4492). For more
details see the power control description on the next page.
The following alarms reach the connectors CON-4, CON-5 and CON-6 at the CIP8231 board as digital
information.
In case of substitution of the CI-4 or the entire PCB CIP8231, it is mandatory to
provide the factory, prior to replacement, the programming identification number
that is clearly indicated on CI-4.