Logic 3 RAT 1 - Manual (Page 10)

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10
In some cases you may need to
drive more than one set of speakers
from a single RAT1, such as in large
rooms or adjoining areas where
common volume operation is
acceptable. A typical system is
shown in Fig. 6.
1. Use the same charts and rules for
setting the impedance jumpers.
In Fig. 6, all 8-Ohm speakers and
an amplifier capable of handling
an impedance of 4-Ohms, is
assumed; resulting in a jumper
setting of S1.
2. Note that two MIRV1's are used;
one at one location in the room
and the 2nd in another, for
convenience of use. They both
control the same volume level and
track each other.
Driving Multiple Speakers From a Single RAT1
S8 S4 S2 S1
L+ L– R– R+ L+ L– R– R+
AMPLIFIER
INPUT
SPEAKER
OUTPUT
STATUS POWER IR IN ST
A
TUS
GND +12 VDC
12VDC
RAT1
REMOTE AUTO TRANSFORMER
R L
+ – + –
R L
+ – + –
780-80
"J" Box
IR Receiver
MIRV1
Volume
Control
MIRV1
Volume
Control
LARGE ROOM OR AREA
ST G V
ST G V
FROM AMPLIFIER
SPEAKER TERMINALS
786-00
Status Power
Supply
782-00
Power Supply
To 120 V AC
(unswitched)
IR
IR
Fig. 6 Driving Two Speaker Pairs From One RAT1
INSTALLATION (cont'd)
12VDC
+12 VDC
GND
STATUS
IR IN
EMITTERS
IR
RCVR
789-44
CONNECTING BLOCK
®
CD Changer
Satellite Receiver
CONTROL OUTPUTS
LOGIC POLARITY
SELECT
OR
A
B
CONTROL
INPUTS
1 2 3 4 5
1 2 3 4 5 6 7 8 910 ON
283M
Blink-IR™
789-44
Connecting Block
793-10
Serial Combiner
CONTROL OUTPUTS
LOGIC POLARITY
SELECT
OR
A
B
CONTROL
INPUTS
1 2 3 4 5
1 2 3 4 5 6 7 8 910 ON
793-10
Serial Combiner
White
Stripped
Side (+)
To IR IN
and GND
on each RAT1
To IR IN
and GND
on each RAT1 Use Mini-Plug-
to-Stripped
end cables,
Pt. # 6015900
"Daisy-Chain"
connection. Use
3.5/3.5mm Mini-
Plug cable,
Pt. # 6017400
To additional
Emitters if
needed +
–
CONTROLLED
COMPONENTS
283M Blink-IR™
Mouse Emitter
793-10 SERIAL CONTROL COMBINER 793-10 SERIAL CONTROL COMBINER
Fig. 5 Daisy-Chaining 793-00's in Multiple RAT1 Dedicated IR Bus Systems
RAT1
12-8-00
Rev.C