Multiplex Technology CHANNEL PLUS 3445 - Manual (Page 2)

This ChannelPlus 3400 Series video distribution system contains digitally-tuned
video modulators that convert 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 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.
Models available:
3425 2 channel system
3445 4 channel system
Model 3245/3445 - RF section
Connection for
Modulator Section
(Requires coax cable,
RG-6 recommended)
Expansion input
for other modulators
(25dBmV max)
Outputs for TVs (8)
Input for cable or antenna
2
Ant
/
CA
TV
INPUT
For use with model
2133 IR targets
INPUTS MODULA
TORS
A
B+Pwr
OUTPUTS To
TVs
distribution panel
}
CH
C
CH
D
VIDEO AUDIO L AUDIO R
CH
A
CH
B
VIDEO AUDIO L AUDIO R
OUTPUT
600mA
15VDC POWER
® model 3445 four channel integrated modulator and distribution system
pll frequency control
D C B A
program select
Controls and Connections -
Model 3445 shown
RF output
Select button chooses
the modulator.
Program button enters
the channel number
Modulator LEDs show which
modulator is selected
Video inputs
Power supply
15VDC 600mA
Audio inputs: Right and Left
Terminating jumpers (remove for hi-Z)
Remove jumper for Hi-Z (See manual)
A B C D
C A D B Option:
To connect the video and audio to a local monitor, use RCA type
‘Y’ adaptors and remove the ’LOOP’ jumper for this channel.
VIDEO
AUDIO L
AUDIO R
Cable HRC and IRC 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
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.
400 series’ modulators
Note
all
all
Changing modulation standards
Common questions
7
Specifications: typical @ 25 C ± 5 C O O
3400 Series
RF output
Power supply
(UL listed)
Physical
performance
Video
Inputs
65-125
(excluding 95-99)
14-64 channel ranges
model number
signal/noise 55 dB
-60 dBC
0 dB
<9 watts
+15 dBmV (75dBµV)
105-125 VAC
-45dBC @ 12MHz
600mA
15 VDC
differential phase <4º
differential gain
L & R inputs combined for monaural
4%
audio
video
UHF
350-079
CATV standard
1 Vp-p @ 75
1 Vrms @ 47K
output level
input power
IM distortion
power consumption
alternate channel
Gain CATV/Ant to output
output voltage
output current
1 lbs 2 oz (0.5kg)
RF section 0.9x6.3x2.5“ (2.4x16x6.4cm)
2 lbs 10 oz (1.19kg)
modulator section 1.5x7.9x5.5“ (3.8x20.0x14.1cm)
Can an amplifier be used on an output to drive signals over longer cable paths?
Can a splitter be used on one or more outputs in order to add more TVs?
… No.
The IR remote control feature will be defeated if an external amplifier is used.
… No. The
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 remote control feature will be defeated.
Mounting hole template
To hang with connectors on the side
To hang with connectors on the bottom or top