Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Balancing the Reverse Path
Reverse main input pad for each station port
Reverse output pad
Reverse transmitter input pad
Note: See illustration in step 4 for location of the reverse transmitter input pad.
2 Refer to the reverse system design print and inject the proper RF signal level into
the launch amplifier via the reverse injection test point. For the exact location of
the reverse injection test point, refer to the illustration in step 1.
The reverse system design print should specify a “design” reverse input level at
The reverse system design print should specify a “design” reverse input level at
the station’s reverse input port(s). You must inject the correct signal level into the
reverse injection test point using an RF test probe and a reverse sweep
transmitter or a CW signal generator. The reverse injection test point has 20 dB of
insertion loss (-20 dB injection point).
Note: To calculate the correct signal level to inject, you must first calculate the
Note: To calculate the correct signal level to inject, you must first calculate the
input level to the reverse amplifier module.
Example:
Example:
Specified port (station) input, per design = 19 dBmV
Injection test point loss = 20 dB
Port Input + Injection test point loss = Signal generator setting
19 dBmV + 20 dB = 39 dBmV
Set the signal generator output for + 39 dBmV. This signal, when injected
through the reverse injection point, is attenuated by 20 dB, simulating the 19
dBmV port input level specified per design.
Important:
OL-30035-03
77