Olson Technology OTD-3000 - Manual (Page 4)

025-000053 REV G Page 4
1) DEMODULATOR OPERATION
A) Input Channel selection - Remove the front panel plate on the “Input Channel Select” to expose the
channel select and band select DIP switches.
The channel select switch is the first 12 positions on the left side of the opening. The next 3 positions
are for band select and the last position is for AFC “On-Off” selection. The channel select codes for
all standard input channels is attached to the DIP switch cover for operator’s convenience and also
appears on page 5 of this manual. To select an HRC input channel, utilize the HRC code page
attached to the manual. To select a channel, follow the code sheet from left to right placing the DIP
switch in either the up or down position as indicated by the code sheet. (0 = DOWN, 1 = UP)
The band select switch for the channel selected is as follows:
This information is also included on the code cards attached to the cover plate.
B) AFC selection - Most off air TV stations are usually very close to the specified carrier frequency
such that the AFC function need not be used. However, some UHF stations have a tendency to
drift so it is best to utilize the AFC function. Simply put the AFC switch (last switch on the right) in
the down position for automatic frequency control.
C) Off cable processing should not require AFC but make sure the proper code sheet (standard
channel or HRC) is utilized.