User's Manual

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System Configuration Introduction – p. 14
In the rear slots, one Downstream and one Upstream RF interface card are
required. Each of these corresponds to its companion Universal card. The
“Quad” downstream card has four RF connectors and provides four downstream
channels. The “Hex” upstream card has six RF connectors and provides six
upstream channels.
Note: All Downstream cards have a fixed output
frequency of 44 MHz which must be converted up per the
local requirements.
Upstream cards may be configured to receive any
frequency from 5-65 MHz
Figure 1-1. The XMTS Chassis with (from left to right) Upstream card, Downstream
card, Control and Forward card, MASTER4 card, and Power Supplies
shown.
The XMTS is mounted in a standard 19” by 6U high rack-mounted chassis.
The chassis has a fan tray above the unit, bringing the total height required
in the rack, to 8U. The eight bay chassis contains eight slots in the front, six
slots in the rear, and a mid-plane card in between, used to interface the
cards. Blank panels cover unused slots.
A standard 33 MHz, 32 bit Compaq PCI bus is used to transfer traffic and
data between the system cards. The power supplies, Master4 card and the
universal cards are inserted in the front slots of the chassis. The Quad
Downstream, Hex Upstream, and E1/T1 cards are inserted in the rear slots
of the chassis.
The ON/OFF power switch and the fuse are located in the rear of the power
supply.