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600-106 Rev B
Multiplex Technology, Inc., Brea, CA 92821
Ch
anne
l
model 3445 four channel integrated modulator & distribution system
pll frequency control
®
Multiplex Technology, Inc. warrants this products to be free
from defects in materials and workmanship for a period of
one year from the date of purchase or MTI will repair, or at its
option, replace the defective product. To obtain warranty
service, call MTI for a return material authorization (RMA)
number and return the product prepaid to Multiplex
Technology, Inc., 3001 Enterprise Street, Brea, CA 92821,
Attention: Customer Service. Please put the RMA number
on the outsideof the carton.
Any implied warranty arising from the sale of the product
including implied warranties of merchantability and fitness
for purpose are limited to the warranty stated above. MTI
shall not be responsible for losses or damages or expenses,
whether direct, consequential or incidental arising from the
use of or the inability to use this product. Some states do not
allow limitations on how long the implied warranty lasts or
the exclusion or limitation or incidental or consequential
damages, so the above limitations and exclusions may not
apply to you. This warranty gives you specific legal rights,
and you may have other rights which may vary from state to
state.
Warranty
PERFORMANCE MULTI-ROOM VIDEO
Multi-room Video Distribution System
Installation Manual
®
select
A B C D
model 3445 four channel integrated modulator & distribution system
program
program
INPUTS
A B+Pwr
IR
For use with model
2133 IR targets
OUTPUTS
distribution panel
ToTVs
MODULATORS
Ant /
CATV
INPUT
pll frequency control
Models
3425/3445
600-106 Rev B
Multiplex Technology, Inc., Brea, CA 92821
This device complies with the FCC's Part 15 Rules for TV
interface devices. Any change or modification to this device
without the permission of Multiplex Technology, Inc. may
void the user's authority to operatethis equipment.
multiplex
technology, inc.
3001 Enterprise Street, Brea, CA 92821-6213, U.S.A.
714-996-4100 * 800-999-5225 * FAX 714-996-4900 * www.channelplus.com
®
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This ChannelPlus 3400 Series video distribution system contains digitally-tuned
video modulators that convert any baseband video and audio signal to a userselected UHF, or Ultraband CATV channel. An internal quartz crystal reference
oscillator and PLL circuitry ensure drift-free performance. The user selects the
output frequency (channel) using the "select" button to choose whichmodulator and
the "program" button to enter the number of the desired channel. Any TV connected
to the output via coax can receive the signals, when the TV is tuned to the proper
channel.
Models available:
3425 2 channel system
3445 4 channel system
Controls and Connections - Model 3445 shown
®
model 3445 four channel integrated modulator and distribution system
select
program
DCBA
OUTPUT
pll frequency control
POWER
15VDC
600mA
CH D
CH C
VIDEO AUDIO L AUDIO R
RF output
Program button enters
the channel number
Select button chooses
the modulator.
Modulator LEDs show which
Power supply
15VDC 600mA
Video inputs
Audio inputs: Right and Left
modulator is selected
Terminating jumpers (remove for hi-Z)
Option:
To connect the video and audio to a local monitor, use RCA type
‘Y’ adaptors and remove the ’LOOP’ jumper for this channel.
AUDIO L
VIDEO
AUDIO R
Model 3245/3445 - RF section
Connection for
Modulator Section
(Requires coax cable,
RG-6 recommended)
Expansion input
for other modulators
(25dBmV max)
B+Pwr
MODULATORS
A
INPUTS
Outputs for TVs (8)
Input for cable or antenna
OUTPUTS
ToTVs
distribution panel
}
2
CH B
CH A
VIDEO AUDIO L AUDIO R
ADB
For use with model
2133 IR targets
ABCD
Removejumper for Hi-Z
(Seemanual)
C
Ant /
CATV
INPUT
Changing modulation standards
Cable HRC andIRC considerations
Most cable services use IRC frequency assignments. This is the default for the ChannelPlus
3 . However, if the cable service uses HRC or the TV appears to search
400 series’modulators
for the "house channels," the modulator can be reprogrammed to use HRC assignments by
entering the number “ 98”. Set to IRC by entering a “99”. Both of these settings are only used
for setting HRC/IRC. : This setting can be entered on any modulator channel, A, B, C, or
D, and affects all channel assignments for that unit. Cable channels must either be IRC or
HRC.
all
Note
all
Common questions
Can an amplifier be used on an output to drive signals over longer cable paths?
The IR remote controlfeature will be defeated ifanexternal amplifier is used.
Can a splitter be used on one or more outputs in order to add more TVs?
model 3425/3445 Multi-room Video Distribution System is a pre-engineered system providing
optimum signal levels to each TV for clear, crisp picture quality. Each time a splitter is added,
there is lowering of signal level called insertion loss. Insertion losses upset system
performance. Additionally, the IR remotecontrol feature will be defeated.
To hang with connectors on the side
To hang with connectors on the bottom or top
Mounting hole template
Specifications: typical @ 25 C ± 5 C
OO
3400 Series
Inputs
Video
performance
RF output
Power supply
(UL listed)
Physical
video
audio
L & R inputs combined for monaural
differential gain
differential phase
signal/noise 55 dB
channel ranges
output level
IM distortion
alternate channel
Gain CATV/Ant to output
model number
output current
output voltage
input power
power consumption
modulator section 1.5x7.9x5.5“ (3.8x20.0x14.1cm)
RF section 0.9x6.3x2.5“ (2.4x16x6.4cm)
1Vp-p@75
1 Vrms @ 47K
4%
<4º
UHF
14-64
(excluding 95-99)
+15 dBmV (75dBµV)
-60 dBC
-45dBC @ 12MHz
0dB
350-079
600mA
15 VDC
105-125 VAC
<9 watts
2 lbs 10 oz (1.19kg)
1 lbs 2 oz (0.5kg)
7
… No.
… No. The
CATVstandard
65-125
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Things to watch for:
3
No picture
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 CATV16 are at different frequencies.
Weak ChannelPlus UHF channel
connected.
LEDs blink
blink if you havemade an ‘illegal’ choice. See the section onprogramming.
Herringbone interference on ChannelPlus channel (diagonal lines)
You may have chosen a channel number that is not completely vacant. Distant UHF stationsmay
be un-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 ChannelPlus channel to another number. You may have to add a low pass filter to
remove cable company noise. If a filter does not work, try adding a DC-blockto remove common
mode interference.
Herringbone interference on many channels, including ChannelPlus
channels (disappears when you remove the CATV/Ant feed)
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 that is far stronger than the rest. In this case
attenuating all of the signals with a simple attenuator will cause the desired stations to be weak
(snowy). In this case you must reduce the strength of only the 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 providesuitable filters.
Audio volume is low
audio level, both right and left inputs must be used. If you have a mono source, connect it to both
right and left inputsusing an RCA ‘Y’ connector.
No color on ChannelPlus channels
all televisions can accommodate the 1.25MHz frequency difference between the H and I cable
standards.
Infrared Remote Control Problems … Use the red light on the side of the modulator
section as a trouble shooting aid. This light will blinkasremote control signals are relayed.
If the light is on constantly, one or more IR targets is receiving electrical or optical noise. At the
modulator section unit, begin to disconnect the outputs to the TVs until the goes off.
This will tell youwhich IR target is thesourceof the noise.
Next cover the front of the offending IR target. If the light turns off, the IR target is
‘seeing’ a source of IR noise, such as a solid state flourescent lamp. If the light does not go out,
the problem may be radiated electrical noise from the TV. Reposition this IR target. If
repositioning the IR target does not help, the TV may be conducting noise from its input. Place a
DC block between theIR target and the TV.
If the light seems toindicate proper operation, but thecomponent is not beingcontrolled,
the IR emitter maybe mis-located. Be sure theemittersare in front of theIRsensor.
… Verify that the video source is on and is producing a video signal. Check that the
… If the TV has a separate UHF input, be sure that it is
... You need to have one unused channel space between channels. The display will
...
… The RF amplifier can be
… The left and right audio inputs are combined for monaural. For proper
… You may have chosen the incorrect cable standard. Not
See the section onprogramming.
IR DATA
lightIR DATA
IR DATA
IR DATA
Simple DC-block for RF Inexpensive 0-20dB attenuator
Sample System Diagram
SATELLITE
RECEIVER
Video/audio
outputs
Model 3445
OUTPUT
POWER
15VDC
600mA
Video/audio
RG6 coax
preferred
Use only shielded 75 ohm coax
(Distributes to as many as 8 TVs)
CH D
CH C
VIDEO AUDIO L AUDIO R
outputs
VCR
RF section
CATV/Antenna
CCTV Camera
at front door
CH B
CH A
VIDEO AUDIO L AUDIO R
12:00
VCR
Removejumper for Hi-Z
(Seemanual)
DVD
In this system, CATV or antenna
channels are available on all TVs. In
addition the following channels have
been added:
Channel 66 -Front door channel
Channel 68 -VCR
Channel 70 -Satellite receiver
Channel 72 -DVD player
ABCD
Model 2173 IR emitter repeats
what the IR target ‘sees’ in the
other room.
Video/audio
outputs
Any or all TVs may have
a model 2133 IR Target
Attach the IR emitter directly
over the IR sensor.
To more TVs
Control the DVD,
DSS or VCR from
any room.
6
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P
model3445 four channel integrated modulator & distribution system
pllfrequencycontrol
select
program
model3445 four channel integrated modulator & distribution system
pllfrequencycontrol
select
program
model3445 four channel integrated modulator & distribution system
pllfrequencycontrol
rogrammingExamples:
To program modulator to channelB67
®
model3445 four channel integrated modulator & distribution system
select
program
select
program
A B C D
IR
Press button until
select
channel LED is on
B
ABCD
Wait for channel LED to light
select program
B
(ready for next number.)
ABCD
select program
Press button
6
ABCD
Press button
7
more times
ABCD
pllfrequencycontrol
program
times
select program
program
select program
Valid Channels:
Channel Spacing:
Error indication:
14-64: UHF channels
65-125: CATV channels
95-99: not valid
Skip at least one number between channels.
Channels 14 and 16: OK.
Channels 14 and 15: Illegal.
If an error has occurred or an incorrect channel is
entered, the LED will flash quickly for a second and
return to theprevious settings.
If two adjacent channels are selected, the unit will
accept the entry but will blink the LEDs of channels
that are too close. If this happens, re-program one
of the channelsto move itaway from the other.
To program modulator to channelC 120
®
model3445 four channel integrated modulator & distribution system
select
program
select
program
A B C D
Press button until
select
channel LED is on
C
ABCD
Wait for channel LED to light
select program
C
(ready for next number.)
ABCD
Wait for channel LED to light
select program
C
(ready for next number.)
ABCD
select program
IR
Press button
1
time
ABCD
Press button
2
more times
ABCD
Press button
10
more times
(press 10 to enter a ‘zero’)
ABCD
pllfrequencycontrol
program
select program
program
select program
program
select program
Channel number
readback:
A readback mode will display the current channel
assignments.
To readback modulator C channel assignment
(example: C has been programmed to channel )108
®
model3445 four channel integrated modulator & distribution system
select program
select
program
A B C D
IR
Press button until
select
channel LED is on
C
ABCD
select program
Led blinks time and pauses1
ABCD
select program
Led blinks times8
ABCD
select program
Hold button down
program
for 5 seconds, then release.
ABCD
Led blinks times, pauses
(“10” is read back as 0)
ABCD
pllfrequencycontrol
select program
10
select program
4
5
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