NetMedia MM73S User Manual

TriplePlay Stereo Modulator

NM-MM73S

The NetMedia MM73S TriplePlay Stereo Modulator converts three composite video and stereo audio
signals to three MTS Stereo television channels. The selectable channels are viewed with a standard
television (SDTV) tuner. Once modulated, the signals are no longer bound to a single monitor or TV;
they can be combined with antenna, cable, or satellite signals for distribution to multiple TV’s through­out the location. This provides convenient viewing access to security cameras, DVR’s, or other
audio/video (A/V) sources such as DVD’s and VCR’s.

Product Includes:

1. Modulator Assembly (3 - A/Video Input Connectors, RF Output Connector,
Power Input Connector, End Plate, 3 - Switch Banks, Power LED).

1

2V DC 300mA Power Transformer (Center Conductor Positive).

2.

3. 3 - 3.5mm to RCA A/V Cables.

Baseband A/V to SDTV Converter

RF Output Connector

Connects modulated stereo output

channels to video distribution

system and televisions.

NM-MM73S

A/V Input Connectors

Composite video and stereo audio input
for A/V sources such as cameras, quads,
DVR’s, DVD’s, etc.

End Plate

Remove to access
Switch Banks.

FEATURES

Stereo audio input and output

Digital PLL locked audio & video - no drift

Combines with existing TV channels

Viewable on multiple televisions

UHF & Cable channel coverage

Channel retained during power outage

Tough aluminum housing

Includes power supply

5 year limited warranty

NetMedia, Inc., 10940 N. Stallard Place, Tucson, Arizona 85737 [phone] Fax: [phone] Email: [e-mail] www.netmedia.com

SPECIFICATIONS

Modulation Method:
Output Channel:
Output Level:
Output Connector:
Input Connector:
Video Input Signal:
Audio Input Signal:
Audio Output:
Cable Type:
Power Requirement:
Power Connector:
Housing Size:
Weight:

SDTV: UHF 14-69, CABLE 70-94, 100-125

5.5mm OD, 2.1mm ID, center positive

3.9“ long x 5.5” wide x 0.9“ high

Power Input Connector

12V DC 300mA, center positive.

Switch Banks

Behind End Plate -

Set output channels:

CABLE 70-94, 100-125.

Power LED

Indicates that unit is on.

Digital Crystal PLL

+30dBmV

Female F, 75 Ohm

3- 3.5mm A/V jacks

Baseband, 75 Ohm, 1 Vp-p

Stereo, 75,000 Ohm, 1 Vp-p

MTS Stereo

RG59, RG6 or better

12V DC, 300mA

9.0 oz.

(subject to change without notice)

UHF 14-69

MAN-MM73S REV0709A

NM-MM73S

Installation Procedures:

1. Remove the End Plate from the modulator assembly and set each channel with the switches as shown in
Figure 1. Choose unused channels that match the tuning mode of the televisions. With antenna tuning,
choose UHF channels from 14-69. With cable tuning, choose CABLE channels from 70-94 or 100-125. There
must be at least one blank channel on either side of each modulated channel to separate it from any other
broadcast, cable, or modulated source. When combining with cable service, be aware that digital data
typically interferes with channels 80-117, even when not subscribed to digital services. If no channels are
available then a filter such as NetMedia’s CNF7080 (ch. 70-80) may be necessary.

2. Connect a video source to an A/V Cable’s yellow RCA video input jack. Adapter’s such as BNC to RCA may be
used as necessary. If audio is available, connect it to the A/V Cable’s white and red RCA audio input jacks.
Insert the A/V Cable’s 3.5mm plug into the modulator’s A/V Input 1. Repeat for A/V Inputs 2 and 3.

3. Connect a coax cable from the modulator’s F connector to the coax from a television or distribution system.
Connect the 12V DC 300mA power supply to an AC outlet. The modulator pictures are now available on the
programmed TV channels.

NM-MM73S

OFF

ON

Add numbers

switched ON

to set channel.

80 40 20 10 8 4 2 1

CABLE Channel 125

OFF

ON

80 40 20 10 8 4 2 1

UHF Channel 25

Figure 1 - Setting the modulated channel with the switches. Valid channels are UHF 14-69, CABLE 70-94, 100-125.

Distribution

Modulator

Main cable or

Antenna

Optional Ch. 70-80 Filter (NM-CNF7080)

when there are no clear cable channels.

Splitter/

Combiner

Panel

or Splitter

Figure 2 - Connecting the modulator to an antenna or cable service and distributing to multiple televisions.

Television

Television

Modulator

Dual LNB

Satellite

Satellite
Diplexer

Satellite
Multiswitch
w/Ant input

Sat In

Ant In

Figure 3 - Connecting the modulator to a satellite system and distributing to multiple televisions.

NetMedia, Inc., 10940 N. Stallard Place, Tucson, Arizona 85737 [phone] Fax: [phone] Email: [e-mail] www.netmedia.com

Satellite Receiver

Television

MAN-MM73S REV0709A