10
Fiber Optic
Series
11
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PICO MACOM
Fiber Optic
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Example of a fiber cable cleaner (source: Fiber Instrument Sales, www.fiberinstrumentsales.com).
4.3 RF Output Connections
Connect a RF output coax cable to a rear panel F-connector labeled RF OUT and route to com-
biners, transmitters or other equipment which use the RF signal. Install a second coax for the
PRR-2 and up to 4 for the PRR-4, if desired.
You may monitor each output signal from the rear panel test port. The PRR includes a -20
dB directional coupler to divert a small amount of the signal from the primary RF OUT to this
output. The -20 dB level is approximate and varies due to parts variations.
5. Front Panel Operations
The PRR has one user adjustment per RF output, the RF ADJUST on the front panel.
ONLINE OPTICAL
ADJUST
RF
RECEIVER 1
Detail of front panel for one receiver
5.1 Setting RF ADJUST
You must determine the RF level needed by the equipment receiving the RF signal from each
RF OUT port based on that equipment manufacturer’s recommendations.
We recommend using a spectrum analyzer to measure the RF OUT port’s level. Connect the
spectrum analyzer to the RF OUT port; note the spectrum analyzer may require 50-75 Ohm
matching and the loss from that matching device must be added to the spectrum analyzer read-
ing.
The PRR, with the RF ADJUST control set to fully clockwise position will output approximately
45 dBmV. To reduce the output to the desired level, rotate RF ADJUST for the RF OUT port
with the spectrum analyzer to the desired level.
Repeat this process for each RF OUT port that you will be using.
