User's Manual

Technalogix Ltd Adrenaline Control System
VI-49
The RF input signal comes in to the RF module through J216 (BNC female) or J202 (SMA
female) before it passes through a phase adjust circuit (installed only in multiple power amplifier
systems) made up of U228/U231 and associated circuitry. The signal then passes through the
voltage-controlled variable attenuator, U238. This attenuator is controlled via DAC (U209) and
buffer (U226) via the microcontroller. Finally, the low level RF signal is passed through a gain
stage (U243) before exiting through J213 (SMA female).
The RF coupled signals produced by the coupler for forward and reflected power are passed
onto the RF module by connectors J204 and J207, respectively. Each signal is then converted
to a DC voltage proportional to the RF levels by detector ICs U229 and U242. The DC voltages
are buffered and filtered via CLC networks before being sent to the microcontroller (U220) and
comparator (U217) for monitoring.
Aside from taking readings from the coupler, the microcontroller on the RF module also
interfaces with the Temperature Sensor (through J211). The high speed shutdown signal for the
pallets is also passed through the Temperature Sensor PCB from the RF module. The lower
speed shutdown for the pallets or control is passed through pin 6 on J201. The microcontroller
interfaces with the system CAN bus using U235 transceiver. Through the CAN bus, the RF
board is able to communicate with the Display Interface module, and any other amplifier
enclosures that are in the system.
The last task of the RF board is to send and receive remote access signals to and from the
transmitter/translator. Two analog outputs, proportional to forward and reflected power and
produced by the digital potentiometer U223 after it receives input from the microcontroller. The
analog outputs are then buffered by U208 before being sent to the DB25 parallel output
connector, J215. J215 also carries the digital fault flags and input/output controls. The digital
signals are then connected to the microcontroller through the opto-isolators U211, U213, U214,
U215, and U237. The Remote Port allows external control of the transmission system via the
DB25. The Power Amplifier enclosure does not include all the pins in the Remote Port like the
Combiner/Filter enclosure.