User Manual

MXi DUAL PALLET AMPLIFIER CHASSIS
PUB06-79 Rev 1 July 17, 2007 06-79-1 MXi Dual Pallet Amplifier Chassis
1 MXi DUAL PALLET AMPLIFIER
The MXi Dual Pallet Amplifier Chassis Assembly 41D2047G4 consists of a standard 19" rack mountable 5.25"
(3RU) enclosure containing the amplifier heatsink assembly, a fan array assembly consisting of four DC cooling
fans, a controller board with built-in RF detectors, and a front panel consisting of ON/OFF, RESET switches and
an LCD/Touchpad, and a rear panel assembly with connectors for interfacing to external equipment. A dual output
DC power supply for powering the amplifier, the controller and the cooling fans is also housed in this enclosure.
Figure 1 is a front view of the MXi201U amplifier, showing the LCD Touchpad, ON/OFF switch, Status PWR
(Green) and FAULT (Red) LEDs, and RESET switch.
Figure 1 Front View of MXi Amplifier
Figure 2 Rear View of MXi Amplifier
The rear of the MXi AMPLIFIER has the following connectors (from left to right):
• RF IN SMA connector-
• RF OUT N connector
• RF TP SMA connector – RF sample
• REMOTE CONTROL 15-pin D-shell connector
• RS232 SERIAL nine-pin connector
• INTERLOCK terminal board
• AC INPUT
The MXi is classified as a broadband amplifier, thus it is operational to cover the entire UHF television spectrum
ranging in frequencies from 470MHz to 860MHz.
Controlled DC power to the amplifier assembly comes from the high efficiency 1000W switching power supply via
a two-pin connector, J4 of the MXi Controller Board. Regulated DC of +32V from the switching power supply is
the B+ voltage to the amplifier heatsink assembly. The second auxiliary output of the power supply is +12VDC,
which is used for powering the controller and the cooling fans.
The heatsink cooling fans are the +12DC, 4-inch muffin model. Typically, they come ON at the same time B+ is
applied to the power amplifier. It is connected to the controller PC board connector, J8. As built, the cooling fans