Cisco GainMaker Optoelectronic Node 1GHz with 42 54 MHz Split Installationsanleitung
Chapter 3 Balancing and Setup
proceeding.
2 Ensure that the design value reverse output equalizer and reverse pads are
installed in the appropriate reverse slots in the amplifier. Refer to the following
diagram.
Note: Record the pad values for each input port for later use.
Note: Record the pad values for each input port for later use.
3 Proceed to
To Calculate the Proper RF Signal Level (on page 78).
To Calculate the Proper RF Signal Level
In order to calculate the correct RF signal level to inject, you must know the
following.
Design Reverse Port Input Level from the design print
Total Injection Insertion Loss (20 dB)
To calculate the correct signal level to inject, add the total injection insertion loss to
the design port input level.
Example
Design amplifier reverse port input level = 19 dBmV
Total injection insertion loss = 20 dB
The design amplifier reverse port input level plus injection insertion loss equals
correct RF signal level to inject.
In the example shown above, 19 dBmV + 20 dB = 39 dBmV. Therefore, you would
In the example shown above, 19 dBmV + 20 dB = 39 dBmV. Therefore, you would
set the signal generator output for + 39 dBmV.
Important:
Important:
When using a CW signal generator, inject at least two carriers, one at the low end
and one at the high end of the reverse bandpass. In a reverse system with a 5
MHz to 40 MHz bandpass, the low frequency carrier should be in the 5 MHz to
10 MHz range and the high frequency carrier should be in the 35 MHz to 40
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