IR Receivers
3
780-80
Fig.5
Fig. 4
IR Carrier Frequency Adjust-
IR Carrier
Adjust
Full CW
32 kHz
Full CCW
56 kHz
38 kHz
48 kHz
42 kHz
FREQ
L
H
NOTE: The frequency markings shown in Fig. 4 are approxi-
mate only. You may need to "fine tune" the adjustment for best
performance.
4. If you have products in the same IR system that have different
IR carrier frequencies, you will have to adjust the 780-80 to a
midway position. For example, some may operate at 38 kHz
and others at 56 kHz. In this case, set the adjustment to
approximately 47 kHz, a midway position just to the right of the
48 kHz marking in Fig. 4.
NOTE: Some products are more tolerant of compromised
frequency settings than others. You may have to "fine tune" the
adjustment to "favor" the least tolerant component for the best
performance of all units in the system.
Using the Status LED Indicator
The 780-80 includes a Status LED, located just below the Talkback
LED (see Fig. 1). This permits multi-room systems to have visible power ON/OFF indicators in the remote
rooms.
When used with a ZPR68 Six Zone-Eight Source Preamp, you would connect the terminal marked STATUS
on the 780-80 to the terminal marked STATUS (or CO) on the ZPR68 IR Zone Input, as part of the normal
4-wire hookup. See Fig. 5 below.
-In single zone systems, the Status LED could show the ON/OFF status of an A/V receiver.
• To do this, you would plug a 12V adapter, such as the Xantech 786-00 Power Supply, into the
switched
AC Outlet of the A/V receiver. The 12V leads are then connected between the STATUS and
GNDterminals on the 789-44 ("+" to STATUS, "–" to GND). See Fig. 6.
• You may reduce the brightness of the Status LED by placing a resistor in series with the positive lead. Use
a resistor value that achieves the desired brightness level (usually 1k Ohm to 3.3k Ohm, 1/8 watt).
Fig.6
ZONE CONTROL - IR INPUTS
+12V
GND
STATUS
IR IN
+12V
STATUS
GND
IR OUT
Hand Held
Remote
GND
IR OUT
+12V
780-80
J-Box
IR Receiver
(rear view)
4-Conductor
Inter-room Cable
(unshielded OK)
MAIN ROOM
REMOTE ROOM
STATUS
V
G
ST
S
Add resistor in series
with Status line to
adjust brightness, if required.
(See text near Fig. 6).
780-80
IR RECEIVER
ZPR68-10
Zone Control - IR Inputs section
®
+12V
STATUS
GND
IR OUT
283M
Blink-IR™
Mouse Emitter
To 120 VAC
(unswitched)
781RG
Power Supply
283M
Emitter
283M
Emitter
Hand Held
Remote
VCR
GND
IR OUT
+12V
780-80
J-Box
IR Receiver
(rear view)
4-Conductor
Inter-room Cable
(unshielded OK)
STATUS
Positive Side ("+")
786-00
Power Supply
(12V at 10 mA)
Plug into
Switched AC Outlet
on A/V Receiver
(see text)
Add resistor in series
with Status line to
adjust brightness, if desired.
(See text, this page).
REMOTE ROOM
MAIN ROOM
– +
789-44
Connecting Block
780-80
IR RECEIVER
®
12VDC
+12 VDC
GND
STATUS
IR IN
EMITTERS
IR
RCVR
789-44
CONNECTING BLOCK
®
Satellite Receiver
A/V Receiver
