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STUDER REVOXx
REVOX IR REMOTE CONTROL SYSTEMS
E 4/2*
4.1.2
Operation
The
indirect
remote
control
of a REVOX
unit
from
a
remote
room
(via the B206 transceiver)
differs
in no
way
from the direct
remote
control;
those
keys on the
remote
control
which
have the same designation
as on
the
unit
itself
initiate
the same
function.
When
the 8206
IR transceiver
receives
a command,
a feed-
back
lamp behind
the red filter
pane
turns
on briefly.
The
68206 draws
such
Little
power
that
the
mains
adapter
can
stay
permanently
connected
to the AC source.
4.1.3.
Application
examples
of the 8206
as transceiver:
B202, 8203, B251, 8252
a IR
8261, B215, B225,
B226
IR
[Rem.ctt.]>>>>> 8206
B285, B286, 8291
B710MKII-IR
Cext.Power ! >
as receiver:
IR
B203, 8251, 8215, B225
B226, 8285, B286, B291
B261
* On
all units
with SERIAL
LINK the internal
IR
receiver
can
be switched
off.
(In the connector
Link ping
with
pin5,
as well as pint with pin 2. Caution
in the case of
parallel-connected
units:
see Fig. 4.1.)
4.2
FUNCTIONAL
DESCRIPTION
pt
Se
nnd
The
B206
IR transceiver
consists
of two
sections:
the
receive/transmit
branch
Cinput:
IR signal,
output:
either
electrical
signal
or
IR
signal
with
IR
transmitter
adapter)
and an IR transmitter
adapter.
4.2.1
Receive/transmit
branch:
tne
se
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The
input signal
(from the REVOX
system remote
control)
is
received
by the photodiode
DP1.
IC1 amplifies
the re-
ceived
signal,
its output
drives
the transistors
5,
6,
Q?7.
The
operating
mode of the 8206 can be selected
with
jumper
JSP1.
JSP1
in position
"T":
The B206
functions
as a transceiver,
terminal
3 of the 6-
pin
socket
is connected
to the collector
of Q7.
Here
is
where
the
IR transmitter
LEDs
can be connected.
JSP1
in position
"R":
The 8206
functions
as a receiver;
terminal
3 of the 6-pin
socket
is connected
to the collector
of
Q5;
the
output
signal
can be used for other
applications.
As soon as a signal
is available
on the output
on IC1,
I¢2
is triggered which
causes
the feedback
Lamp OL5 to turn on
for approximately
0.5 seconds.
The
supply voltage
is taken either
from terminal
4 of the
6-pin
socket
to the receive
branch,
or
to
the
bridge
rectifier
06...D9
of the 2-pin connection
for
external
supply.
This means
that
the polarity
of the supply voltage
is
not
relevant
when an external
mains
adapter
is
used.
The
Zener
diode
D3
protects
the
circuit
from
surge
voltages.
4.2.2
IR transmitter
adapter
a
a
a
es
The
transmitter
adapter
consists
of
two
serially
connected
IR LEDS.
The anode
of the diodes
is connected
to
terminal
5 (+5V)
and the cathode
to terminal
3
(collector
of Q7)
of the socket
on the 8206
« Transceiver.
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