Mod input
+
1
5
vd
c
ir
o
u
t
g
n
d
A
B
(pwr)
TV output
VDA38B
CATV
3 X 8 Bi-Directional Video Distribution Amplifier
Mod input
A
B
(pwr)
TV output
VDA38B
CATV
3 X 8 Bi-Directional Video Distribution Amplifier
Media
Center
CXIRWP
wall plate
4
IR Repeating System:
Bedroom
ELAN
IR receiver
TV with IR receiver connected to a
CXIRWP wall plate.
IR signals are
repeated at media
center controlling a
video product.
5
With VDA38 you can also control your video components from any room in the
house.
Any or all 8 outputs of a VDA38 may be connected to a CXIRWP wall plate. The
CXIRWP breaks out the IR signal from the coaxial cable and features an input jack
for an IR receiver and an output jack for an IR emitter (see the CXIRWP installation
manual for further details).
If the VDA38 happens to be located in the media center, an IR emitter may be
connected directly to the VDA38 as shown below.
ELAN
IR emitter
ELAN IR emitter
IR Troubleshooting
1)
If IR light glows steadily, there is
noise entering the system.
2)
First disconnect the coax cables from all of the television output jacks. Find the
source of the noise by re-connecting cables one at a time until the IR light glows.
This identifies that coax as a noise source. Connect this noisy coax only for the next
steps. Remember that there could be more than one source of noise, so you may
need to repeat the following steps for each coax. Now step 3 will determine which
type of noise problem you have.
3a) Optical noise.
Cover the target with a towel. If the IR
lights stops blinking, you have optical noise. The target
may be pointed at a window, a fluorescent light or a
plasma TV. Reposition the target so it can’t “see” the
source of IR light. If the IR light still glows, proceed to the
next step.
3b) EMI noise:
TV sets are sources of EMI, electromagnetic
interference.
Move the target away from the TV and try to
reposition the target so the IR light stays off.
Move the target
TV set
is ON
Shade the target
TV set
is ON
MOD4000
modulator
POWER
POWER
LED
EMITTER
TARGET
TO
TV
TV set
is ON
If the system trips the circuit breakers
(IR systems only)
Using DC blocks.
All output ports must be connected to a CXIRWP wall plate OR a
DC block. If DC blocks are not used, the internal circuit breaker may trip to protect
the system. (An output port that is not used will not trip the system and requires no
DC block.)
Use a DC block on all
output ports that do not
connect to a CXIRWP wall
plate. (IR systems only)
Mod input
+
1
5
vd
c
ir
o
u
t
g
n
d
A
B
(pwr)
TV output
VDA38B
CATV
3 X 8 Bi-Directional Video Distribution Amplifier
DC Block
IR Troubleshooting (continued)
2
3
1) Hook from the top
2) Swing into place
3) Push button to lock
1
ELAN modules attach from the top
All
ELAN
modules are
grid compatible.
TM
TM
select
program
IR
pll frequency control
A
B
C D
4-Channel Digital Modulator
MOD4000
Telephones
Expansion
Ports
In
Out
R
T
R
T
R
T
R
T
4
3
2
1
Telephone Expansion Hub (4 lines x 8 phones)
P
R
IN
T
E
R
'S
IN
S
T
R
U
C
T
IO
N
S
:
IN
S
T
R
,IN
S
T
L,
V
D
A
38
B
_H
,O
E
M
-
L
IN
E
A
R
P
/N
: 2
22
75
9
X
2
-
IN
K
: B
LA
C
K
-
M
AT
E
R
IA
L:
1
13
G
S
M
W
H
IT
E
P
A
P
E
R
C
O
AT
E
D
2
-S
ID
E
S
(
C
2S
)
-
S
IZ
E
: 8
.5
00
"
X
1
1.
00
0"
-
F
O
LD
IN
G
: A
LB
U
M
F
O
LD
, B
IN
D
IN
G
: S
A
D
D
LE
-S
T
IT
C
H
-
S
C
A
LE
: 1
-1
-
IM
A
G
E
4
O
F
4
