Cisco Cisco OptoStar II Driver Amplifier 설치 가이드
Starting up the Module, Continued
Signal Inspection
Use a DB meter or spectrum analyzer to measure the RF level to be inputted
into the module, to ensure the appropriate RF level into the forward driver
amplifier module. If the input level is out of the range, the module performance
will be degraded.
into the module, to ensure the appropriate RF level into the forward driver
amplifier module. If the input level is out of the range, the module performance
will be degraded.
•
RF input signals are divided into the following three conditions:
1. If the RF input signal has only analog signal, the analog signal input
1. If the RF input signal has only analog signal, the analog signal input
level is 15 ± 5 dBmV/channel at the broadcast RF input port.
Recommended input level: the analog signal is 15 dBmV/channel at the
broadcast RF input port.
Recommended input level: the analog signal is 15 dBmV/channel at the
broadcast RF input port.
2. If the RF input signal has both analog signal and digital signal, the
analog signal input level is 15 ± 5 dBmV/channel at the broadcast RF
input port; the digital signal input level is 9 ± 5 dBmV/channel at the
broadcast RF input port; and the digital signal input level is 21 ± 5
dBmV/channel at the narrowcast RF input port.
Recommended input level: the analog signal 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.
input port; the digital signal input level is 9 ± 5 dBmV/channel at the
broadcast RF input port; and the digital signal input level is 21 ± 5
dBmV/channel at the narrowcast RF input port.
Recommended input level: the analog signal 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.
3. If the RF input signal has only digital signal, the digital signal input
level is 15 ± 5 dBmV/channel at the broadcast RF input port.
Recommended input level: the digital signal is 15 dBmV/channel at the
broadcast RF input port.
Recommended input level: the digital signal is 15 dBmV/channel at the
broadcast RF input port.
•
A DB meter or spectrum analyzer can be used to measure the RF output
level via the RF test point on the front panel. The RF input level can be
adjusted if necessary. When the broadcast RF input, the actual value of the
input level (dB) equals to the measured value +20. 0 ± 1. 0; when the
narrowcast RF input, the actual value of the input level (dB) equals to the
measured value +32. 0 ± 1. 0.
level via the RF test point on the front panel. The RF input level can be
adjusted if necessary. When the broadcast RF input, the actual value of the
input level (dB) equals to the measured value +20. 0 ± 1. 0; when the
narrowcast RF input, the actual value of the input level (dB) equals to the
measured value +32. 0 ± 1. 0.
OL-29667-02
Operation
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