Cisco Multimedia Stretch Taps 설치 가이드
Installing Optional Modules
590212 Rev G
23
Installing Optional Modules
The tap uses a plug-in directional coupler (DC) module to set the tap value. The DC
value is selected for each installation to provide the proper RF input level. The
orientation of the DC module on the circuit board determines which port serves as
the RF input and which is the RF output.
value is selected for each installation to provide the proper RF input level. The
orientation of the DC module on the circuit board determines which port serves as
the RF input and which is the RF output.
If needed, the tap faceplate can use a directional coupler/equalizer (DC/EQ) module
in the directional coupler socket. The equalizer function controls the output tilt to the
drop cables and does not affect the feeder cable signal. The DC/EQ can equalize the
tap port across the RF passband in steps between 3 dB to 18 dB. The signal down the
line is not affected.
in the directional coupler socket. The equalizer function controls the output tilt to the
drop cables and does not affect the feeder cable signal. The DC/EQ can equalize the
tap port across the RF passband in steps between 3 dB to 18 dB. The signal down the
line is not affected.
About Pre-Configured Taps
All taps are pre-configured at the factory with a directional coupler module already
installed. The faceplate decal indicates the configured tap loss.
installed. The faceplate decal indicates the configured tap loss.
Follow the procedure To Install the Module if you need to change the tap loss or
signal direction on a pre-configured tap or to replace the module with another type.
signal direction on a pre-configured tap or to replace the module with another type.
To Install the Module
Complete the following steps to install the module.
1 If the faceplate is mounted in the tap housing, follow the steps in Removing the
1 If the faceplate is mounted in the tap housing, follow the steps in Removing the
Faceplate (on page 13) before proceeding.
2 Select the appropriate module as specified by the system design. Also select the
appropriate decal shipped with the module. Refer to Tap Part Numbers (on page
54) for a list of available modules.
54) for a list of available modules.
3 Locate the directional coupler socket on the tap circuit board. See the diagram
below for location.
4 Orient the module to correspond to the signal flow direction as shown in Option
1 and Option 2.