Olson Technology OTR-3550-SW - Manual (Page 3)

025-000232 REV C Page 3
A) CHANNEL SELECTION - Channel selection is accomplished by properly setting the 12-position DIP
switches to the corresponding channel code. Channel codes can be selected from Figure #3 or the code
card attached to the Input Channel Select cover plate. Set the DIP switches from left to right.
For example - If channel 11 is selected, then its corresponding channel code is:
0 = Switch in DOWN Position
1 = Switch in UP Position
To select an HRC input channel, utilize the HRC code chart attached to this manual.
CAUTION: Channel codes for input and output channel select are completely different.
B) BAND SELECTION - Band selection is accomplished by setting the 6-position DIP switches to the
corresponding band. Only three switches are used for this purpose. Band select codes can be chosen from
Figure #3 or the code card attached to the Input Channel Select cover plate. Then, set the DIP switches
from left to right. For example - If band A-3 to Channel 13 is desired, then its corresponding code is:
C) 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 set the AFC switch (fifth switch to the left of band select) to the down
position for automatic frequency control (AFC “ON”). For example - If AFC is desired on band A-3 to
Channel 13, then the set up is:
Off-cable processing should not require AFC, but make sure the proper code sheet (Standard Channel or HRC)
is utilized.
D) INPUT CONNECTION - After an input channel has been selected (Steps A through C), connect an antenna
or cable source to the RF input terminal. Any VHF, UHF or cable source can be connected to the RF input
connector. For optimum video quality response, the input signal level should have a minimum of +20dBmV.
This unit will function with input signal levels as low as -20dBmV but any signals below -20dBmV will be
squelched by the internal squelch circuit.