Hafler IRIS - Manual (Page 11)

USING THE IRIS
REMOTE SYSTEM
Infrared Remote Integrated System
INTRODUCTION
Key Command
Transmissions
volume/
Balance (V/B)
Command
Transmissions
The IRIS preamplifier achieves its infrared (IR) remote capabil-
ity by the addition of the IRIS remote RECEIVER board, which
plugs into a keyed male connector at the top of the preamplifier’s
Command/Memory/Display (CMD) board, containing the front-
by a 32-bit Pulse-Code-Modulation (PCM)
signal. The carrier is also amplitude modulated for clocking
synchronization. This code must pass stringent format check-
ing at the receiver, to ensure communication security.
The IR pulses radiate from the two clear LEDs arranged in a”V”
formation, protruding through the remote’s bezel. Dominant
radiation is to the front, where the minute lenses are located, but
considerable radiation is available to the sides and rear of the
array. Thus you will likely find that the remote will communicate
well to most preamplifier locations without having to aim the
transmitter-but every room is different in the IR world, so you
should experiment for best results, possibly also re-reading the
preamplifier location recommendations earlier in this manual.
The top eight KEYS operate much like the input selector KEYS
on your preamplifier. However, from REMOTE, you must hold
the KEY long enough to get at least one flash from the RED
(Completed-Frame) LED at the top front of the remote. The
bottom KEYS, MUTE and NORMAL, operate similarly. The
remaining two KEY
S
, CLR and SX are explained later.
Both of the remote’s knobs are connected to a capacitive touch-
sensing circuit. Touching either knob ALONE causes the remote
to transmit the position of BOTH knobs to the IRIS receiver. The
process takes approximately 1/8 second. At each successive
1/8 second, a new 32-bit frame of knob-position data is trans-
mitted, tracking your knob-motion-until slightly after you release
the knob.
10
pulses modulated in
frequency (25/35 kHz)
panel key switches and legend LED's.
IRIS employs a "carrier" of bright IR