Open House H881 ChannelPlus Install Manual

ChannelPlus Modulator Combiner Hub
The H881 modulator combiner hub
for distribution through a coax panel. Signals from
Typical Installation
Model H838HHR shown
B
+Pwr
Modulators
A
Connect modulators
to A or B inputs
Each of 8 locations can have
its own modulator for
distribution to the entire
350-086 power
supply (included)
Adaptor
(included)
Out
LED glows when
power is applied
The H881 modulator combiner hub work like a zero-loss combiner. The
modulated signals you put on the inputs will appear on the outputs with
about 1dB of gain. When the output of the H881 is connected to one of
the modulator inputs of the H838, signals will automatically appear on the
outputs of the H838 at an FCC legal level.
Note: The H881 does not pass IR information. To control a modulator
from a remote location, use a modulator with IR control such as the H564
and connect to the B+pwr input of the H838.
has inputs for 8 modulators
all 8 inputs are combined into a single
output. This output can be
connected to the modulator
input of a coax panel such
as the H838HHR or
H838BID.
t p u t )
x 1 o u
with the H838, each of 8
i n p u t s
1
l H 8 8
u b ( 8
m o d e
i n e r H
e l P l u s
C o m b
C h a n n locations has a broadband
V i d e o
feed as well as the ability
to insert channels into the
system.
High Headroom Amp w/IR Engine
Televisions CATV
/Ant
Up to 8 TV locations
RG-6 Coaxial cable
DVD, VCR, or Satellite
system
Modulator
RG-6 Coaxial cable
Modulator Combiner Hub 8x1
400MHz to 860MHz
Model
Modulators
OpenHouse
1) Hook from the top
2) Swing into place
3) Push button to lock
When used
Things To Watch For:
No picture
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.
Antenna or cable
(H838HHR)
Weak ChannelPlus UHF channel
Cable only
(H838BID) input, be sure that it is connected.
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)
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.
Input from up
Audio volume is low
to 8 locations
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 ChannelPlus channels
incorrect cable standard. Not all televisions can accommodate the
H881
1.25MHz frequency difference between the H and I cable standards.
See the section on programming.
Specifications: typical @ 25°C ± 5° C
Number of modulator inputs
Gain, modulator input to output
Bandwidth
Nominal modulator input level
Maximum number of modulated channels
Power supply (370-086 included)
tm
modules attach from the top
1
3
2
... Check that the TV and the modulator are tuned to the
... If the TV has a separate UHF
: The RF amplifier can be overloaded by
... The left and right audio inputs are combined
... You may have chosen the
Telephone Master Hub (4 lines x 6 phones) Telephone Master Hub (4 lines x 6 phones)
ChannelPlus model H616
From From
Expansion Expansion Telephones
Telco Telco Ports Ports
R R RJ31X RJ31X
4
T T
R R
3
T T
R R
2
T T
Out
R R
1
T T
8
~1 dB
400-860MHz
25dBmV
16
15 VDC @ 300mA