Cisco Cisco OptoStar II Driver Amplifier インストールガイド
Starting up the Module, Continued
Signal Inspection
•
To ensure optimum performance, use a DB meter or spectrum analyzer to
measure the RF level that will be input into the module and confirm the input
signal is within range.
1. In NTSC system, the analog signal input level is 15 dBmV/channel at the
measure the RF level that will be input into the module and confirm the input
signal is within range.
1. In NTSC system, the analog signal input level is 15 dBmV/channel at the
broadcast RF input port; the digital signal input level is 9 dBmV/channel at
the broadcast RF input port; and the digital signal input level is 21
dBmV/channel at the narrowcast RF input port. The relationship between
signal levels is shown below.
the broadcast RF input port; and the digital signal input level is 21
dBmV/channel at the narrowcast RF input port. The relationship between
signal levels is shown below.
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Norrowcast RF Input Port
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= 6dB
21 dBmV
15 dBmV
9 dBmV
Broadcast RF Input Port
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If the RF signal contains only digital signal, the digital signal input level
will be 13 dBmV/channel at the broadcast RF input port.
will be 13 dBmV/channel at the broadcast RF input port.
2. In PALD/K system, the analog signal input level is 16 dBmV/channel at
the broadcast RF input port; the digital signal input level is 10
dBmV/channel at the broadcast RF input port; and the digital signal input
level is 22 dBmV/channel at the narrowcast RF input port. The relationship
between signal levels is shown below.
dBmV/channel at the broadcast RF input port; and the digital signal input
level is 22 dBmV/channel at the narrowcast RF input port. The relationship
between signal levels is shown below.
D
ig
ita
l
Sign
al
Ana
lo
g
Sign
al
Digit
al
Sign
al
Norrowcast RF Input Port
}
= 6dB
22 dBmV
16 dBmV
10 dBmV
Broadcast RF Input Port
Ana
lo
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Sign
al
Digit
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Sign
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D
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If the RF signal contains only digital signal, the digital signal input level
will be 13 dBmV/channel at the broadcast RF input port.
will be 13 dBmV/channel at the broadcast RF input port.
Continued on next page
OL-29668-02
Operation
3-3