The ChannelPlus SVM Series are digitally-tuned video modulators that convert any
baseband video and audio signal to a user-selected UHF, or Ultraband CATV. 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 which modulator 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. In addition, the SVM series
encodes each channel using the MTS stereo standard. Stereo sound and surround
sound information will be received by any MTS compatible television receiver.
SVM-24 4 channel modulator
Models available:
SVM-22 2 channel modulator
Controls and Connections - Model SVM-24 shown
Front
Back
Power input
Select button chooses the modulator (A/B/C/D)
Program button enters the channel number
LED shows IR data transmission
LEDs show which modulator is selected
2
AUTO TERMINATE FEATURE
All SVM modulators have built in loop through connectors so the user can connect video to
a second device. SVM modulators terminate the inputs into a 75 ohm load. When a
second cable is connected to the output, the SVM automatically disconnects this
termination to allow the second device to terminate.
BASEBAND VIDEO
The SVM modulators come with converter plugs for regular baseband video sources.
These can be used on inputs or outputs.
MOUNTING
The SVM modulators can be mounted in standard 19” racks by attaching the included
mounting ears. Remove the rubber feet on the bottom of the unit to ensure clearance
when inserted into a rack.
A
B
C
DIR
select
program
SVM-24
VIDEOVIDEOVIDEOVIDEO AUDIO LAUDIO LAUDIO LAUDIO L AUDIO RAUDIO RAUDIO RAUDIO R
CH A
CH B
CH C
CH D
CH A
CH B
CH C
CH D
OUTPUT
900mA
15VDC
POWER
S-video input
S-video output
Left audio output
Right audio output
Left audio input
Right audio input
IR emitter outputs
RF Output
Cable HRC and IRC considerations
Note
Most cable services use IRC frequency assignments. This is the default for
the ChannelPlus SVM modulators. However, if the cable service
uses HRC or the TV appears to search 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.
series
all all
Changing modulation standards
7
Specifications: typical @ 25 C ± 5 C
OO
SVM Series modulators
RF output
Power supply
Physical
performance
Video
Inputs
65-125
(excluding 95-99)
14-64
channel ranges
model number
signal/noise 55 dB
-60 dBC
9 watts
11 watts
+25 dBmV (85dBuV)
105-125 VAC
-45dBC @ 12MHz
900mA 900mA
15 VDC
differential phase
<4º
differential gain
4%
audio
1 V rms @ 47k
s-video
UHF
SVM-24SVM-22
CATVstandard
1Vp-p@75
output level
input power
IM distortion
power consumption
alternate channel
output voltage
output current
weight 1.19 kg (2 lbs 10 oz)
depth 16.5 cm (6.5 in)
width 43.2 cm (17 in)
height 4.4 cm (1.75 in)
MTS audio
performance
65 dB
25 dB @ 1000Hz
Certified dbx
Compatible with
Dolby full logic surround sound
20Hz - 12kHz
frequency range
signal/noise
separation
noise reduction
surround sound
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