User Manual

AMPLIFIER CONTROLLER BOARD REV.5
PUB12-030 Rev. 1 Feb 14, 2013 12-030-6 Amplifier Controller Board Rev.5
When the transmitter is used to broadcast a digital DVB signal or similar standard with high peak to average
ratios, a jumper is installed in the lower two pins (marked as DVB) to enable a filter that removes the high peaks
from the detected signal and allow for a measurement of the average power of the RF signal.
For other digital transmitters with lower peak to average ratios (specifically ATSC), there would be no jumper
installed in E13
2.2.14 Jumper E14–Reflected RF Detector Final Gain Control
This jumper selects either a high or low gain for the final stage of the RF detector of the Reflected power. This
jumper is set by the factory depending on the output power of the particular amplifier and level that is obtained
from the RF coupler. This should not be changed in the field.
2.2.15 Jumper E15–Remote Manual Vswr Reset
This jumper allows the remote reset command to directly reset the VSWR trip hardware and bypass the normal
remote control that depends on the microprocessor to generate the reset. This is really and emergency bypass
state in the event that the microprocessor had developed some fault and the operator needs to control the VSWR
relay directly. This would be a very rare condition, and thus jumper E15 is not normally installed.
2.2.16 Jumper E16–AGC Disable Control
When installed, this jumper disables the AGC control of the transmitter and its controller. This is normally only
used with setting up the maximum input drive level for the amplifier. In normal operation, this jumper should
always be removed, since it can allow excessive power to be mistakenly fed through the amplifier.
2.2.17 Jumper E17–VSWR Disable Control
When installed, this jumper disables the VSWR trip interlock of the transmitter and its controller. This is normally
only to be used with setting up the VSWR trip level for the amplifier. In normal operation, this jumper should
always be removed, since it removes the VSWR protection from the amplifier. In the presence of a VSWR
condition, this could result in damage to the amplifier FET devices.
2.2.18 Jumper E23– P/S ON Status Polarity
The Mxi transmitter can be configured with a number of different power supplies depending on the specific power
level and application. Some power supplies generate an active OK status signal whereas other power supply
units generate and active low signal. To support these different requirements, the rev 5 and higher version of the
circuit board has this jumper to select between active high (+12 vdc) or active low (ground) OK status signal. If
jumper E23 is placed in the lower two pins marked as ‘MW’, the OK Status is active low, else if E23 is placed in
the upper two pins then it would be an active high OK Status.
This jumper is set in the factory according to the type of power supply installed in the transmitter and should not
be changed in the field.
2.2.19 Jumper E24– P/S ON Command Polarity
The Mxi transmitter can be configured with a number of different power supplies depending on the specific power
level and application. Some power supplies require an active high signal for their ON control whereas other
power supply units require and active low signal. To support these different requirements, the rev 5 and higher
version of the circuit board has this jumper to select between active high (+12 vdc) or active low (ground) control
signal. If jumper E24 is placed in the lower two pins marked as ‘MW’, the control is active low control, else if E24
is placed in the upper two pins then it would be active high control.
This jumper is set in the factory according to the type of power supply installed in the transmitter and should not
be changed in the field.