Jumper settings
JP5 -- IRC/HRC selection
OPEN = IRC (default)
CLOSED = HRC
Most cable systems use "IRC" for the channel frequencies. Some cable systems use
"HRC" for the channel frequencies.
JP6 -- Code set selection
OPEN = TV code 000 (default)
CLOSED = Cable code 029
The tuner allows for one of two different IR code sets to be selected by this jumper set-
ting. Select the best one for the application, and program the remote to match the se-
lected code setting.
Note: the setting of JP6 has absolutely nothing to do with whether the tuner is re-
ceiving broadcast TV frequencies or cable frequencies; as that is controlled by the
rear panel switch. The "TV" and "Cable" selections listed here refer to the mode set-
tings on the RCA remote. In other words, it is entirely possible to have the rear panel
switch set to "CATV" for the tuner to receive cable frequencies, but JP6 is left open so
that the IR code set is controlled by the "TV" mode of the RCA remote, and the tuner
will tune to all cable channels 1 to 99, as selected from the remote control.
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CATV Tuner User's Manual