User Manual

MXi AMPLIFIER CONTROLLER BOARD REV.2
PUB06-82 Rev 1 July 17, 2007 06-82-14 MXi Amplifier Controller Board Rev.2
reference for the current transmitter power (not the bar graph). This display has a maximum value of 169% power
when the transmitter detectors are set up for a DC output of 4.0 at full power. This value is derived from the fact
that the detector can output a maximum of 5.0VDC to the telemetry circuits, which translates to an output power
of 169%. Of course, this is a maximum display value on the LCD fixed by circuit constraints and the operator
should never be approaching this type of power level with the transmitter. If a display of 169% is indeed
displayed, then either there is a problem with the detector or the power of the transmitter is in fact exceeding
169% and should be attended to immediately.
The second line of the LCD shows the current state of the transmitter and any important errors that are current.
This line typically tells the operator if the transmitter has been asked to be in the ON state. The transmitter is
placed in the ON state either by the local front panel ON button or by a remote ON command. If the transmitter
has been turned off by the operator, the LCD reports that the transmitter is OFF normally (i.e., it was not due to an
error).
If an error condition has occurred that caused the transmitter to shut down, the LCD displays that the transmitter
is OFF and then shows what the error condition is that has caused the shutdown. As an example, if the
External#1 interlock has been opened, the LCD displays TX IS OFF, EXT1 INTERLOCK OPEN.
The third line of the display has a number of status lights with a legend describing the particular status underneath
and all enclosed in a dashed line box. When the light is fully darkened, it indicates that this particular status is
true. When the light is hollow, it indicates that this particular status is false. Each status is detailed below.
3.1.1 REM
Remote Status for the remote controls, operator controlled via the REM submenu.
• Lit when the system is in REMOTE mode and enables remote commands.
• Not lit when in LOCAL mode and remote commands are disabled.
3.1.2 AGC
AGC (Automatic Gain Control) Status, operator controlled via the AMP submenu.
This should always be enabled, the only purpose to have this OFF is during setup.
• Lit when the AGC is enabled and the system holds the output at a specific power level.
• Not lit when AGC is disabled, the output power depends on drive level and amplifier gains.
3.1.3 ERR
Status that shows an error either is current or has occurred since last check.
This is a composite of the other status, however it holds its value even when the error has cleared.
When an error happens such as Ext1 Interlock open, both the ERR and INTK status light.
If the error corrects, the INTK status will clear but not the ERR to show an error has occurred.
The user should check the AMP screen to check the error and then clear this status.
• Lit when an Error has occurred.
• Not lit if no Error has occurred since that last clear.
3.1.4 LOG
Status that shows that there are current entries in the LOG file.
• Lit whenever one or more LOG entries are currently in the LOG file via the LOG submenu.
Note these may not be new LOG entries, if the operator checks the LOG file but does not clear it.
The log entries status remains lit even if there are no new Logs.
The operator should clear the Logs once viewed so that this Log status indicates a new Log entry.