The CAT5MOD single channel modulator
creates a
new channel to add to existing television channels. This
new channel is created from a video signal the
CAT5MOD receives via a single CAT-5 cable connected
to the CAT5AVWP wall plate. Any TV connected to the
output of the CAT5MOD via coax can receive the signal
when tuned to the proper channel (see the CAT5AVWP
installation manual for further details).
Typical Installation
Programming the CAT5MOD
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program
Output
Program
Video
Audio L
W3
W2
W1
W4
Audio R
Power
CAT5MOD
Enter the new channel using the
Program
push button.
Power the CAT5MOD last, make
all cable and CAT-5 connections
first.
Program the new channel using the
Program
push button to enter channel digits into the
CAT5MOD. This new channel should be an unused channel. It should have no interference
or trace of a picture - just “snow”. There must also be one unused channel both above and
below the selected channel to avoid interference. Below is a simple step by step example of
how to program a channel - cable channel
120
:
Press
program
button
1
time
Press
program
button
2
more times
Press
program
button
10
more times
Wait for
power
LED
(ready for next number.)
(press 10 to
enter a ‘zero’)
Wait for
power
LED
(ready for next number.)
LED comes back on when
done. If an incorrect channel
is entered, LED will flash
quickly and return to the
previous setting.
Single Channel Modulator
CAT-5 video
CAT5MOD Single Channel CAT-5 Modulator
Televisions
+
1
2
v
d
c
G
n
d
IR
Modulators
CATV
/Ant
A
B
+Pwr
UP TO 8 TELEVISIONS
Coax Panel (Model VDA38H typical)
Power Supply (Included)
To CAT5AVWP Audio/Video
Wallplate
Terminate cable with an
RJ-45 connector and
connect to the CAT5MOD.
Use T568A Residential wiring pin out.
Default Setting for CAT5MOD
When not using baseband connectors insert all jumpers (W1, W2, W3 & W4 are
installed at factory).
Optional Settings
To use baseband connectors as outputs when CAT5MOD receives video from Cat-
5 video source, insert W2, W3, & W4, remove W1.
To use baseband connectors as inputs when using the CAT5MOD as a stand
alone modulator, insert W1 and remove W2, W3 & W4.
Jumpers
Things To Watch For:
Herringbone interference on modulator channel (diagonal lines):
You may have chosen a
channel number that is not completely vacant. Distant UHF stations may not be watchable, but
will cause interference if you try to create a new channel at the same frequency. Also, cable
companies often have extra signals where there should be none. Try moving the modulator
channel to another number. You may have to add a low pass filter to remove the cable company
noise. If the filter does not work, try adding a DC-block to remove common mode interference.
Herringbone interference on many channels, including modulated channel (disappears
when you remove the CATV/antenna feed)
: The RF amplifier can be overloaded by
abnormally strong signals. Often, you can cure the problem with a simple attenuator. Use a
variable attenuator and try to find a signal level where the interference just disappears.
Sometimes, the problem is one station is far stronger than the rest. In this case, attenuating all
of the signals with a simple attenuator may cause the desired stations to be weak (snowy). You
must reduce the strength of the only offending station. A common FM trap will help if the
problem is a nearby FM tower. If the problem is a nearby TV station, often the station
management can provide suitable filters.
No picture
… Check that the TV and the modulator are tuned to the same channel. For
example, if the modulator is broadcasting on UHF channel 16, make sure the TV is on UHF 16
rather than CATV 16. UHF 16 and CATV 16 are at different frequencies. Also ... Make sure the
CAT5MOD and camera or wall plate are wired properly.
Weak CAT5MOD UHF channel
… If the TV has a separate UHF input, be sure that it is
connected.
Audio volume is low
… The left and right audio inputs are combined for monaural. For proper
audio level, both right and left inputs must be used. If you have a mono source, connect it to
both right and left inputs using an RCA ‘Y’ connector.
No color on CAT5MOD channels
… You may have chosen the incorrect cable standard. Not
all televisions can accommodate the 1.25MHz frequency difference between the H and I cable
standards. See the section on programming.
Model VDA38H
High Headroom RF Distribution Amplifier
CAT5MOD
Single Channel CAT-5 Modulator
Cable HRC and IRC considerations:
Most cable services use standard or IRC frequency assignments. This is the default for the
CAT5MOD. However, if the cable services use HRC or the TV appears to search for the
“created channel”, program the channel injector for HRC.
For HRC enter a 98. Reset to IRC by entering 99.
Entries 98 and 99 are for setting HRC or IRC only. They do not change the channel number.
PRINTER'S INSTRUCTIONS:
INSTR,INSTL,CAT5MOD,OEM - LINEAR P/N: 222646 X2 - INK: BLACK - MATERIAL: 113 GSM WHITE PAPER COATED 2-SIDES (C2S) - SIZE: 11.000" X 12.500" - FOLDING: 1-FOLD VERTICAL, 4-FOLDS HORIZONTAL, (FINISH HAS LOGOS SHOWING) - SCALE: 1-1 - SIDE 2 OF 2 (BACK)
