Linear D1VA Owner's Manual

Warranty

600-057 Rev A

Multiplex Technology, Inc., Brea, CA 92821

Modulator

Installation Manual

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Channel

PERFORMANCE MULTI-ROOM VIDEO

Modulator

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 outside of 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.

Installation Manual

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"D" Series: Frequency-Agile

Modulators

Models:

D1VA, D2VA, D1VA PAL & D2VA PAL

6315 MTS Stereo Modulator

600-057 Rev A

Multiplex Technology, Inc., Brea, CA 92821

multiplex

technology, inc.

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

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

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"D" Series Modulator Controls and Connections

CHANNEL A

CHANNEL B

OO

The ChannelPlus "D" Series are digitally-tuned video modulators that convert any
baseband video and audio signal toa user-selected UHF, Ultraband CATV, Japan or
PAL channel. An internal temperature-compensated quartz crystal reference
oscillator and PLL circuitry ensure drift-free performance. The user selects the
output frequency (channel) using the "up" and "down" buttons while observing the
digital display on the front panel. Any TV connected to the output via coax can
receive the signals,when the TVis tuned to the proper channel.

Front panel - cover removed

Power LED: power is on. Modulator should be left on. There is no power switch.

CHANNEL A

Digital display,
two channels.

"Up" and "down" switches:
choose output channel number.

Rear panel - D2VA (D1VA and PAL units are similar)

Video inputsRF output

CHANNEL B

Power connector.

150

10

RF Output level control.

Specification: typical @ 25 C ± 5 C

"D" Series modulators

Inputs

video
audio 1 V rms @ 47k

Video
performance

RF output

power supply

MTS audio
performance
model 6315 only

differential gain < 2% (0.2 dB)
differential phase <3º
signal/noise 65 dB

output level

+30 dBmV (90dBuV)
IM distortion
alternate channel

-45dBC @ 12MHz
model number
input power

105-125 VAC 210-230VAC
power consumption
output voltage

26.0 VAC CT @ 400mA

13.5 VAC CT @ 400mA
frequency range
signal/noise
separation

25 dB @ 1000Hz

surround sound

Dolby full logic surround sound

noise reduction

1Vp-p@75

13-5965-11714-60channel ranges

-60 dBC

8 watts

20Hz - 12kHz

65 dB

Compatible with

Certified dbx

PALG,H,IJPNUHF CATVstandard

21-56

350-030350-026

C

A

H

U

A

D

N

I

O

OUTPUT

A

VIDEOVIDEO LEFTLEFT

Audio inputs: Right and Left are combined for monaural.

Rear panel - 6315 MTS stereo modulator

Audio inputs

OUTPUT

The model 6315 is a single channel MTS
stereo video modulator. Stereo video
sources (DVD players, LV players, VCRs)
will provide stereo with dbx noise reduction
on all TVs in the house. The 6315 is
compatible with modern surround sound
processors.

VIDEO OUTVIDEO IN LEFTLEFT

2

C

A

H

U

A

D

N

I

O

B

RIGHTRIGHT

P

O

W

E
R

Power connector.Video inputRF output

P

O

W

E

RIGHTRIGHT

R

Loop-thru outputs to send video and audio
inputs to a local monitor. When the loop­thru is not being used, the supplied 75 ohm
terminator must be installed in the “Video
Out” connector.

Tuning the Oscillator

channel B

channel B
adjustment coil

channel B
test point

channel A

channel A
adjustment coil

channel A
test point

7

1. Remove case.

2. Insert video
source.

3. Locate
appropriate
adjustable coil.

4. Connect a
frequency
counter to test
point.

5. Adjust coil to
desired audio
frequency
offset.

PAL G 5.5 MHz
PAL I 6.0 MHz
PAL K 6.5 MHz

CHANNEL A

CHANNEL B

CHANNELB

CHANNELA

CHANNEL A

Front panel controls

CHANNEL B

CHANNEL A

To increase
output

level

Display indicates the selected
channel

numbers. When no video

signal

is present, the display for

that

channel will not remain lit.

Press the up or down button
to

set channel number

3

CHANNEL A

CHANNEL B

150

10

RF Output level control.

Things to watch for:

Display blinks

... You need to have one unused channel space between channels.

The display willblink if youhave made an‘illegal’ choice.

Herringbone interference onChannelPlus channel (diagonallines)

have chosen a channel number that is not completely vacant. Distant UHF stations
may be un-watchable, but will cause interference if you try to 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. Youmay have toadd a lowpass filter toremove cable company noise.

Herringbone interference on many channels (disappears when you remove
the modulator)

… The high output of the ChannelPlus modulator can overdrive

many RF amplifiers. Reduce theRF output usingthe front panelcontrol.

Audio volume is low on D1VA or D2VA modulator … 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.

Audio volume is low on 6315 MTS stereo modulator

here, other thanturn up thevolume. Here is what is happening:

In broadcast television, the audio is compressed: The soft sounds areamplified

!

to be almost as loud as the loud sounds. The technical measure of this is
dynamic range, the ratio of loudest to softest sounds.
video devices such as DVD and LV players is very great. Since most of a
typical movie consists of ‘soft’ sounds, the audio will seem quieter than normal
television channels. (

This is also why commercials, which are the most

compressed, seem louderthan the programthey accompany.)

!

To appear to be at the same volume as broadcast channels, the audio level in a
modulator is normally increased. In the model 6315, this high signal level
would overdrive the MTS circuits and surround sound performance would
suffer.

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 Hand I cablestandards.

... Youmay

… There is little you can do

The dynamic range of

150

CHANNEL B

Display indicates the selected
channel numbers. When no video
signal is present, the display for
that channel will not remain lit.

CHANNEL A

Press the up or down button
to set channel number

Changing modulation standards

number of inputs

(1 or 2)

standard

0 = UHF
1 = CABLE I
2 = CABLE H
3 = JAPAN
4 = PAL (special models

available )

hold this button down while applying power

CHANNEL A

"up" button changes
number of inputs

to change standard:

To increase
output level

10

CHANNELA

CHANNELB

"down" button

changes standard

H I

150

10

1. Using the supplied transformer, apply power while pushing the channel A "up" selector
button. The unit will remain in the modulationstandards programming mode until power is
removed.

2. Choose the number of inputs (1 or 2) with the channelA "up" selector button.

3. Choose the standard to modulate your source(s): UHF, Cable I, Cable H, Japan or PAL
using the channel A "down" selector button. After 5 seconds these settings will be written
to permanent memory. The display will blink oncewhen this happens.

4. Remove power. Restore power. The unit is nowin normal operatingmode.

6

System Diagram

System Diagram

CCTV Camera

at front door

CATV Input

OUTPUT

OUTPUT

C
H
A
N

A

SATELLITE
RECEIVER

VCR

12:00

VCR

A
U
D

I

O

C

A

H

U

A

D

N

I

O

B

VIDEOVIDEO

RIGHTRIGHT

LEFTLEFT

P

O

W

E
R

D2VA Modulator

P

O

W

E

VIDEO OUTVIDEO IN

RIGHTRIGHT

LEFTLEFT

R

Model 6315

MTS Stereo Modulator

Model 3308 Coax panel

(Distributes to as many as

8 TVs)

In this system, cable channels are
available on all TVs. In addition the
following channels havebeen added:

Video and audio loops through
to main TV. (Optional hookup.)

Install 75 ohm terminator if the
loop-through is not used.

Main TV

(In media center)

Channel 66 -Front door channel
Channel 68 -VCR
Channel 70 -DSS in MTSstereo

Note that the loop-through option on
the model 6315 allows the main TV to
watch the DSS on composite video,
for enhanced videoperformance.

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