Digital Equipment ChannelWorks DECTV-AA, Installer'S Manual

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3-2 ChannelWorks Cable TV Installer’s Guide
Setting The TransMaster’s Forward And Return Frequencies
Forward (Output) Channel Frequency Selection
Front panel DIP switches control the selection of channel frequency. You use the DIP
switches labeled Output Frequency Select to set the forward channel frequency. Use
the TransMaster Frequency Setting chart in Appendix A to set DIP switch assignments
for the desired operating frequency. For the ChannelWorks Bridge, channel center fre-
quency is the normal operating position.
Return (Input) Channel Frequency Selection
The input section of the input tuner is selectable with regard to pre-tuner gain. Position
A in Figure 3-2 is for input signals below 0 dBmV. Position B of Figure 3-2 is for input
signals above 0 dBmV to 10 dBmV. The normal operating position will be B.
Switches 14, 15 and 16 must be set as shown in Figure 3-2. Refer to “Adjusting The
TransMaster Gain” for more information on using the Input Frequency Select DIP
switches.
You use the DIP switches labeled Input Frequency Select to set the return channel fre-
quency. The TransMaster Frequency Switch Setting chart in Appendix A indicates the
DIP switch settings for all return channels. The first 13 switches (from left to right in
Figure 3-2) are for frequency selection.
After you set the TransMaster’s forward and return frequencies, turn the TransMaster’s
power on.
Figure 3-1 TransMaster, Single Channel, Frequency Agile Translator