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Warranty
600-057 Rev A
600-057 Rev A
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.
Multiplex Technology, Inc., Brea, CA 92821
Multiplex Technology, Inc., Brea, CA 92821
Modulator
Installation Manual
Modulator
Installation Manual
R
"D" Series: Frequency-Agile
Modulators
Models:
D1VA, D2VA, D1VA PAL & D2VA PAL
6315 MTS Stereo Modulator
Channel
R
3001 Enterprise Street, Brea, CA 92821-6213, U.S.A.
714-996-4100 * 800-999-5225 * FAX 714-996-4900 * www.channelplus.com
multiplex
technology, inc.
R
PERFORMANCE MULTI-ROOM VIDEO
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"D" Series Modulator Controls and Connections
The ChannelPlus "D" Series are digitally-tuned video modulators that convert any
baseband video and audio signal toauser-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 theTV is tuned tothe proper channel.
OUTPUT
VIDEO OUTVIDEO IN LEFTLEFT
P
O
W
E
R
RIGHTRIGHT
Front panel - cover removed
RF Output level control.
"Up" and "down" switches:
choose output channel number.
Power LED: power is on. Modulator should be left on. There is no power switch.
Digital display,
two channels.
Power connector.
Audio inputs
Video inputsRF output
Power connector.Video inputRF output
Rear panel - D2VA (D1VA and PAL units are similar)
Rear panel - 6315 MTS stereo modulator
CHANNEL A
CHANNEL A
CHANNEL B
CHANNEL B
10
150
OUTPUT
VIDEOVIDEO LEFTLEFT
P
O
W
E
R
RIGHTRIGHT
C
H
A
N
C
H
A
N
A
U
D
I
O
A
U
D
I
O
B
A
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.
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.
Audio inputs: Right and Left are combined for monaural.
2
Specification: typical @ 25 C ± 5 C
OO
"D" Series modulators
Tuning the Oscillator
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
channel B
test point
channel A
test point
channel B
adjustment coil
channel A
adjustment coil
RF output
power supply
MTS audio
performance
model 6315 only
performance
Video
Inputs
21-56
350-030350-026
13-5965-11714-60channel ranges
model number
signal/noise 65 dB
65 dB
25 dB @ 1000Hz
Certified dbx
Compatible with
Dolby full logic surround sound
20Hz - 12kHz
-60 dBC
8 watts
+30 dBmV (90dBuV)
105-125 VAC 210-230VAC
-45dBC @ 12MHz
26.0 VAC CT @ 400mA
13.5 VAC CT @ 400mA
differential phase <3º
differential gain < 2% (0.2 dB)
audio 1 V rms @ 47k
video
PALG,H,IJPNUHF CATVstandard
1Vp-p@75
output level
input power
IM distortion
power consumption
alternate channel
output voltage
frequency range
signal/noise
separation
noise reduction
surround sound
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CHANNEL A
CHANNEL A
CHANNEL B
CHANNEL B
10
150
Things to watch for:
Display blinks
Herringbone interference on ChannelPlus channel(diagonal lines)
Herringbone interference on many channels (disappears when you remove
the modulator)
Audio volume is low on 6315 MTS stereo modulator
... You need to have one unusedchannel space between channels.
The display will blink ifyou have made an‘illegal’ choice.
... You may
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. You may have to adda low pass filterto remove cable companynoise.
… The high output of the ChannelPlus modulator can overdrive
many RF amplifiers. Reduce the RF outputusing the front panelcontrol.
… There is little you can do
here, other than turn upthe volume. Here is what ishappening:
The dynamic range of
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. (
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 H and Icable standards.
Audio volume is low on D1VA or D2VA modulator … The left and right audio
inputs arecombined 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.
In broadcast television, the audiois 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.
This is also why commercials, which are the most
compressed, seem louder than theprogram they accompany.)
RF Output level control.
6
Changing modulation standards
1. Using the supplied transformer, apply power while pushing the channel A "up" selector
button. The unit will remain in the modulation standardsprogramming mode until poweris
removed.
2. Choose thenumber of inputs (1or 2) with thechannel A"up" selectorbutton.
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 blinkonce when this happens.
4. Remove power. Restore power. The unitis now innormal operatingmode.
10
150
H I
CHANNELB
CHANNELB
CHANNELA
CHANNELA
CHANNEL A
CHANNEL A
number of inputs
(1 or 2)
standard
0 = UHF
1 = CABLE I
2 = CABLE H
3 = JAPAN
4 = PAL (special models
available )
"up" button changes
number of inputs
"down" button
changes standard
to change standard:
hold this button down while applying power
Front panel controls
10
150
CHANNEL B
CHANNEL B
CHANNEL A
CHANNEL A
To increase
output level
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.
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
Press the up or down button
to
set channel number
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System Diagram
System Diagram
D2VA Modulator
VCR
CCTV Camera
at front door
SATELLITE
RECEIVER
CATV Input
Model 6315
MTS Stereo Modulator
OUTPUT
VIDEO OUTVIDEO IN
LEFTLEFT
P
O
W
E
R
RIGHTRIGHT
OUTPUT
VIDEOVIDEO
LEFTLEFT
P
O
W
E
R
RIGHTRIGHT
C
H
A
N
C
H
A
N
A
U
D
I
O
A
U
D
I
O
B
A
VCR
12:00
Install 75 ohm terminator if the
loop-through is not used.
Video and audio loops through
to main TV. (Optional hookup.)
4
Model 3308 Coax panel
(Distributes to as many as
8 TVs)
Main TV
(In media center)
In this system, cable channels are
available on all TVs. In addition the
following channels have been added:
Channel 66 - Front doorchannel
Channel 68 - VCR
Channel 70 - DSS inMTS stereo
Note that the loop-through option on
the model 6315 allows the main TV to
watch the DSS on composite video,
for enhanced video performance.
5
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