Linear H541 Owner's Manual

ChannelPlus Video Modulator

The H541 modulator is a digitally tuned video modulator that converts

any baseband video and audio signal to a user-selected

UHF or Ultraband CATV channel. An internal

quartz crystal reference oscillator and

PLL circuitry ensure drift-free

performance. The user

l

o

tr

n

o

c
y

c

n

e

u

selects the output frequency

q

re
llf
p

r

to
la
u

d

o
M
l

a

it

ig

D

(channel) using the DIP switch
on the front panel. Any TV

Modulator (single channel)

connected to the output via

ChannelPlus model H541

coax can receive the signal,

Output

Input

Video

Audio R

io L

ud

A

nel Select

Chan

er

Pow

l

e
n
n

a

h

C
le
g

in

S

when tuned to the proper
channel.

Typical Installation

Coax Panel (Model H838HHR typical)

High Headroom Amp w/IR Engine

IR

Gnd

+12vdc

B

+Pwr

350-086 power
supply (included)

Modulators

A

Output

Power

Televisions

RG-6 Coaxial cable

Model H541

Channel Select

Audio L Audio R

Up to 8 televisions

Input

CATV

/Ant

Audio inputs: Right and left
are combined for monaural.

Video

Video input

OpenHouse modules attach from the top

tm

1

1) Hook from the top

2) Swing into place

3) push button to lock

3

2

RTR

4

T
R

R

3

T

T

R

R

2

T

T
R

R

1

T

T

From

From

Expansion

Expansion

Telco

Telco

TelephoneMaster Hub (4 lines x 6 phones)

TelephoneMaster Hub (4 lines x 6 phones)

Ports

Ports

RJ31XRJ31X

Out

ChannelPlusmodel H616

TelephonesTelephones

Programming the H541

Set the DIP switches from the following guide:

-Set desired mode: UHF, CATV std, CATV irc or CATV hrc.

-Set channel: Find the desired UHF or CATV channel and set.

-Set termination: For normal operation (75 termination) select NORM.
When connecting video to a local monitor using a
‘Y’ adaptor set for LOOP (Hi-Z).

UHF/CATV

14/65

15/66

16/67

17/68

18/69

19/70

20/71

21/72

22/73

23/74

24/75

25/76

26/77

27/78

28/79

29/80

30/81

31/82

32/83

33/84

34/85

35/86

36/87

37/88

38/89

39/90

40/91

41/92

42/93

43/94

44/100

45/101

46/102

47/103

48/104

49/105

50/106

51/107

52/108

53/109

54/110

55/111

56/112

57/113

58/114

59/115

60/116

61/117

62/118

63/119

64/120

65/121

66/122

67/123

68/124

69/125

UHF

CATV

STD

CATV

IRC

CATV

HRC

LOOP

NORM

Programming Examples

UHF channel 23, normal termination (75 )

LED glows when
power is applied

Single Channel Digital Modulator

Use the DIP switch to setup channel,
mode(UHF or Cable), system(std, irc
or hrc) and termination method.

pll frequency control

CCTV Camera

at front door

Things To Watch For:

No picture

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.

Weak ChannelPlus UHF channel

connected.

Herringbone interference on modulator channel (diagonal lines):

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 modulator channels
(disappears when you remove the CATV/antenna 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 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.

… Verify that the video source is on and is producing a video signal. Check that

… If the TV has a separate UHF input, be sure that it is

You may have chosen

: The RF amplifier can be

Cable channel 116 (standard), loop through termination (Hi-Z)

UHF channel 65, normal termination (75 )

Cable channel 65 (HRC), normal termination (75 )

Specifications: typical @ 25 C ± 5 C

Inputs

Video
performance

RF output

Power supply

video
video termination

(switch selectable)

audio

differential gain
differential phase
signal/noise 55 dB

channel ranges

output level

IM distortion
alternate channel
model number
output current

output voltage
input power

OO

1Vp-p@75

75 in normal mode (NORM)

>1M in loop through mode (LOOP)

1 V rms @ 47k

L & R inputs combined for monaural

4%

<4º

UHF

14-69

CATVstandard

65-125

(excluding 95-99)

+25 dBmV (85dBuV)

-60 dBC

-45dBC @ 12MHz

350-086

300mA

15 VDC

105-125 VAC

DECLARATION OF CONFORMITY

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT
TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL
INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE
RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

Installation requirements:

FCC classifies this product under part 15 of its rules as a “television interface device”.
Systems designed using television interface devices have the following legal requirements:

1) The modulated channel signal strength may not exceed 15.56dBmV at any television.

Federal Regulation 47CFR15.115(b)(1)(i).

2) If an antenna is used in the system, the modulated channel signal strength may not exceed

-51dBmV at the antenna input port.

Federal Regulation 47CFR15.115(c)(4).

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 ChannelPlus 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.

For the Installer:

The system you design must comply with these regulations. As the installer, you are
responsible. The easiest way to be fully compliant is to use a ChannelPlus coax panel.
ChannelPlus panels have the necessary isolation from the modulator input ports to the
antenna input port and gain characteristic from the modulator input ports to the television
output ports. These features will make your modulator comply with the above requirements.
The shown above is fully compliant.

Typical Installation

Compatible

TM

ChannelPlus Enclosures, Modules, Accessories & Wall Plates

Starter systems

RF splitters and telephone punch
downs. When it is time to upgrade,
just snap this module out and
replace with one of more of the
more sophisticated units.

DataHub (8 cables, TIA-568A) Category 5 Compliant

ChannelPlusmodel H628

Telephone hubs

Connections for up to 4 phone lines
to every room. Master hub includes
RJ-31X jack for security system
dialer. Expansion hubs increase
telephone locations 8 at a time.

Service center
enclosures

A full line of OpenHouse compatible
enclosures, from simple, inexpensive
mounting brackets to high capacity in­wall cabinets. AC outlets can be
mounted inside the cabinets using a UL
listed accessory.

OUTINOUT

Telco

R

2

T
R

1

T

IN

IN

ComboHub (2 lines x 6 phones, 1input x 4 televisions)

532-230 5MHzto 1000MHz

SPLITTER

TelephonesFrom

OUTINOUT

OUT

COMBINERCOMBINER

ChannelPlusmodel H801

IN

R

Data hubs

Termination blocks for CAT-5 cables &
Ethernet hubs. Bring the Internet to any
room in the home. Or create a home data
network. Share printers or data.

TelephoneMaster Hub (4 lines x 6 phones)

From

Expansion

Telco

Ports

RJ31X

R

4

T
R

3

T
R

2

T

Out

R

1

T

ChannelPlusmodel H616

Telephones

Camera modulators
(for service center)

Create a new TV channel for a front
door, pool area, or baby’s room
cameras. Some models feature Cat-5
input connections.

®

select

program

DCBA

model 5445 quad digital modulator

pll frequency control

Video amplifier hubs

Distribute antenna or cable TV to every
room of the house. Some models include
bi-directional amplifiers for interactive cable
systems. Some models include
inputs and

IR engines.

modulator

Entertainment modulators
(for media center)

Create new TV channels for DVD, VCR, and a
satellite receiver. These modulators sit in the
media center. Some models offer true MTS
stereo with surround sound.

TM

Wall plates

Wall plate systems for all rooms. The typical room gets TV
and telephone. The Home office wall plate adds data ports.
The media center wall plate adds satellite feeds.

IR Accessories

Control video devices from any room.

New ChannelPlus products are added all the time.

Visit our website to learn more: www.channelplus.com

H541

Video Modulator

ChannelPlus

Wiring a house for OpenHouse

The cables in an OpenHouse run from the various rooms of the house
directly to the service center location. (This is known as ‘home run’
wiring.) Two types of wire are used for communication and
entertainment: Cat-5, 4-UTP (4 nshielded wisted airs) wire handles
data or 1 to 4 telephone lines. RG-6 coax handles television (antenna or
cable), satellite dish, cable modem, or AV modulator signals. (An AV
modulator creates new TV channels for front door camera, DVD player, a
VCR or a satellite receiver.)
We recommend the following pre-wire schemes . Run these wires from
the service center to the rooms indicated.

UTP

multiplex

®

technology, inc.

3001 Enterprise Street, Brea, CA 92821-6213, U.S.A.

714-996-4100 800-999-5225 FAX [phone] www.channelplus.com

*

*

*

Warranty

Multiplex Technology, Inc. warrants this product 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 returnthe product prepaid to Multiplex Technology, Inc., 3001Enterprise Street, Brea, CA

92821, Attention: Customer Service.Pleaseput the RMA number on theoutsideof the carton.

Typical Room

1 Cat-5

Media Center

1 Cat-5

Home Office

1 Cat-5

Good

2 Cat-5

1 RG-6

3 RG-6

2 Cat-5

2 RG-6

2 Cat-5

Better

Best

1 RG-6

2 Cat-5

2 RG-6

3 Cat-5

3 RG-6

3 RG-6

2 RG-6

3 Cat-5

3 RG-6

Good ...

Typical room - phone, TV
Media center - phone, satellite receiver, AV modulators
Home office - phone, TV,

cable modem

Better …

Typical room - phone, TV, ethernet
Media center - phone, TV, satellite receiver, AV modulators
Home office -

phone, TV, ethernet, cable modem

ethernet,

Best …

Typical room - phone, TV, ethernet, satellite receiver
Media center - phone, TV, ethernet, satellite receiver, AV modulators, hi-speed data
Home office - phone, TV, ethernet, satellite receiver, cable modem, hi-speed data

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 theuse 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 haveotherrights which may vary from statetostate.

600-169 Rev B600-169 Rev B

Multiplex Technology, Inc., Brea, CA 92821Multiplex Technology, Inc., Brea, CA 92821