Cisco OptoStar II Installation Manual page 35

Operating using ICIM LCD, Continued
The RF input level value of channel A is the channel A RF input total power value,
the scope of its input is 30 to 60 dBmV. In the RF input total power, analog
channel number, digital channel number and the D-value between analog signal
and digital signal single channel input level are all known cases, please according
to the following formula to calculate out the analog signal and digital signal
single channel input level value. (Note: a is the analog signal single channel input
level value; b is the digital signal single channel input level value; c is the value of
digital signal less than analog signal single channel input level; P is the channel A
RF input total power (dBmV); x is the analog channel number; y is the digital
channel number.)
For example:
The analog channel number of RF input is x = 78, and the digital channel
number is y = 75.
The channel A RF input total power by monitored is P = 34.9 dBmV.
The value of digital signal less than analog signal single channel input
level is c = 6.0 dB.
According to the above formula to calculate out the analog signal single channel
input level value of channel A is a = 15.0 dB, and the digital signal single channel
input level value is b = 9.0 dB.
3-8 Operation
Continued on next page
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