Cisco Model D9477 MQAM Modulator Guida All'Installazione
Chapter 1 Introducing the MQAM
4
78-717866-01 Rev D
Input/Output Process
This section describes how the MQAMs modulate, encrypt, and transmit the signals
they receive from external sources.
Back Panel Components
The following table describes the back panel components.
Item
Component
Description
1
AC Unit: AC Power
Inlet
IEC 320-conductor grounded outlet
2
AC Unit: Power
Switch
On/off rocker-type power switch
3
DC Unit: DC Power
Inlet
Two-post terminal block DC power input connection
4
Fuse Holder
(AC Unit) 2.0 A SLO BLO 250 V fuse (Cisco part
number 535391, International T2H)
(DC Unit) 2.5 A SLO BLO 250 V fuse (Cisco part
number 184428)
5
Cooling Fan
Removes heat from the chassis
6
GND
Ground screw for grounding the MQAM
7
RF OUT 4
F-connector for RF output, 75 Ω
8
RF OUT 3
F-connector for RF output, 75 Ω
9
RF OUT 2
F-connector for RF output, 75 Ω
10
RF OUT 1
F-connector for RF output, 75 Ω
11
Cooling Fan
Removes heat from the chassis
12
DVB ASI INPUT 1
Female BNC, 75 Ω connector. Allows for the input of
MPEG 2 TS data at a maximum rate of 216 Mbps
13
DVB ASI INPUT 2
Female BNC, 75 Ω connector. Allows for the input of
MPEG 2 TS data at a maximum rate of 216 Mbps
14
CA SYNC
RS-232 connection to a DB-9 9-pin port used for
diagnostics. Can be used either locally or in conjunction
with a VPN
15
10 BASE T
Ethernet Port. Shares data with Digital Network Control
System Ethernet hub