Harman Kardon AVR 245 Owner's Manual page 28

INSTALLATION
Figure 39 – AVR and Input Selectors
NOTE: Any time you press one of the Input Selectors on the
remote (i.e., DVD/CD, TAPE/The Bridge, HDMI 1/HDMI 2, VID1,
VID2, VID3 or VID4), the remote will switch modes so that it will
only transmit the codes programmed to operate that device. In
order to control the receiver, you will need to press the AVR
button to return the remote to AVR mode.
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