Руководство По Установке для Cisco Cisco OptoStar II Driver Amplifier
General Troubleshooting Information, Continued
Low or High
RF Input
Level
RF Input
Level
RF source
failure
failure
RF cable or
connector
failure
connector
failure
Make sure the RF connector
matches
matches
Make sure the cable works
properly
properly
Inspect whether the input RF signal
level meets the specifications
below:
level meets the specifications
below:
In NTSC system:
1. The analog signal input level is 15
dBmV/channel at the broadcast RF
input port; and the digital signal input
level is 21 dBmV/channel at the
narrowcast RF input port; or the digital
signal input level is 9 dBmV/channel at
the broadcast RF input port.
2. If it contains only digital signal, the
signal input level is 13 dBmV/channel
at the broadcast RF input port.
In PAL system:
1. The analog signal input level is 16
dBmV/channel at the broadcast RF
input port; and the digital signal input
level is 22 dBmV/channel at the
narrowcast RF input port; or the digital
signal input level is 10 dBmV/channel
at the broadcast RF input port.
2. If it contains only digital signal, the
signal input level is 13 dBmV/channel
at the broadcast RF input port.
If the input level is normal, contact the
manufacturer for servicing
1. The analog signal input level is 15
dBmV/channel at the broadcast RF
input port; and the digital signal input
level is 21 dBmV/channel at the
narrowcast RF input port; or the digital
signal input level is 9 dBmV/channel at
the broadcast RF input port.
2. If it contains only digital signal, the
signal input level is 13 dBmV/channel
at the broadcast RF input port.
In PAL system:
1. The analog signal input level is 16
dBmV/channel at the broadcast RF
input port; and the digital signal input
level is 22 dBmV/channel at the
narrowcast RF input port; or the digital
signal input level is 10 dBmV/channel
at the broadcast RF input port.
2. If it contains only digital signal, the
signal input level is 13 dBmV/channel
at the broadcast RF input port.
If the input level is normal, contact the
manufacturer for servicing
CAUTION:
Do not open the enclosure of this module in any case. Opening the enclosure
may result in equipment damage, and you may lose the warranty eligibility.
may result in equipment damage, and you may lose the warranty eligibility.
OL-29668-02
Troubleshooting
4-5