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Before Using the DTR-7.4
Notes:
• The supplied batteries should last for about six
months, although this will vary with usage.
• If the remote controller doesn’t work reliably, try
replacing both batteries.
• Don’t mix new and old batteries, or different types of
batteries.
• If you intend not to use the remote controller for a
long time, remove the batteries to prevent possible
leakage and corrosion.
• Dead batteries should be removed as soon as possible
to prevent possible leakage and corrosion.
To use the remote controller, point it at the DTR-7.4’s
remote control sensor, as shown below. The DTR-7.4’s
Standby indicator flashes while a signal is being
received from the remote controller.
Notes:
• The remote controller may not work reliably if the
DTR-7.4 is subjected to bright light, such as direct
sunlight or inverter-type fluorescent lights. Keep this
in mind when installing the DTR-7.4.
• If another remote controller of the same type is used
in the same room, or the DTR-7.4 is installed close to
equipment that uses infrared rays, the remote control-
ler may not work reliably.
• Don’t put anything, such as a book, on the remote
controller, because the buttons may be pressed inad-
vertently, thereby draining the batteries.
• The remote controller may not work reliably if the
DTR-7.4 is installed in a rack behind colored glass
doors. Keep this in mind when installing the
DTR-7.4.
• The remote controller will not work if there’s an
obstacle between it and the DTR-7.4’s remote control
sensor.
• You can set the transmission signal format to infrared
(IR), or radio frequency (RF) for use with the
optional RF Receiver. This is useful when, for exam-
ple, the DTR-7.4 is installed in a rack or is not in line
of sight of the remote controller.
Installing the Batteries
1
To open the battery compartment, press
the small hollow and slide off the cover.
2
Insert the two supplied batteries (AA/R6)
in accordance with the polarity diagram
inside the battery compartment.
3
Put the cover onto the remote controller
and slide it shut.
Using the Remote Controller
30˚
30˚
Approx. 16 ft. (5 m)
Remote control sensor
Standby indicator
DTR-7.4
Before Using