User Manual

AMPLIFIER CONTROLLER BOARD REV.5
PUB12-030 Rev. 1 Feb 14, 2013 12-030-10 Amplifier Controller Board Rev.5
2.6.1 External #1 Interlock
The interlock that is available on the rear panel is the External #1. This is a single dry contact that is provided to
shut down the RF amplifier in the case of some external problems (such as a bad RF load). It has two possible
connection points that are logically in parallel so that only one needs to be connected. One point is from pins 1
and 2 of J9 on the MXi board. This connector is normally wired to a two-pin terminal block TB1 located on the
back panel. This would be the most accessible and likely connection point.
The second parallel connection is from pins 14 and 15 of J6 on the MXi board which is assigned for Remote
Controls. This 16-pin connector would usually have a 15-wire ribbon cable attached that would route the signals
from the first 15 pins of J6 to a 15-pin D-shell connector on the rear panel.
2.6.2 Remote Interface (Individual)
Connector J6 provides for individual lines of control/status/telemetry that would normally be connected to an
external vendor remote control system (such as Moseley or Gentner). This 16-pin connector would usually have a
15-wire ribbon cable attached that would route the signals from the first 15 pins of J6 to a 15-pin D-shell
connector on the rear panel. The details of the signals on this connector are given in Section 4. For on MXi802
the controls are disabled but the status and telemetries are still active.
2.6.3 Serial RS232 Interface
Connector J2 provides a standard three-wire serial interface (TxD, RxD and Ground) that is used for
communicating with the main TX controller located in the power supply chassis. The user could also use this port
to connect to an external computer or laptop serial port. The MXi sends a serial stream out this serial port that
reports all of the operating parameters of the transmitter. It can also receive serial commands from an appropriate
computer program or the main TX controller.
2.6.4 Serial Ethernet Interface
Device U25 provides a standard RJ45 connection that is used for communicating via to an external computer.
The MXi sends a stream out this port that reports all of the operating parameters of the transmitter. It can also
receive commands from an appropriate computer program.
2.6.5 External DC Power Supply
Higher power MXi transmitters such as the MXi802 and MXi1002 require that the DC power supply for the
amplifier be located external to the amplifier chassis. Connector J5 receives the interface signals for this external
supply. These include a +12V input that provides power to the MXi control board itself, a reference ground, a
sample of the +50VDC that is used to power the amplifier, and current telemetry sample and a control output from
the MXi board used to turn on the supply.
The actual connection is made via a power connector at the rear panel and is wired to connector J5. The actual
connection that supplies the amplifier(s) is wired directly from the rear panel to the amplifier and not through the
MXi control board.