1x4 Combiner/Splitter
MCM Item #33-2196
1x2 Combiner/Splitter
MCM Item #33-2187
1
. One transmitter to one receiver
2. One transmitter with a splitter in line to multiple receivers
3. Connect multiple transmitters to a combiner, you then
connect the combiner to a splitter which is then connected to
multiple receivers. Each receiver may independently select
HDMI to Digital ATSC RF Modulator
This product accepts a high definition HDMI AV signal, and places
that signal on a standard UHF television channel, to be transmitted
over standard 75 ohm cable including RG59/U and RG6/U, at
distances up to several hundred feet. HDMI material from a computer,
DVD or Blu-Ray player, video came, HD video camera or similar
source may be placed on any TV channel from CH14 through CH69.
That signal may be combined with existing RF signals from outdoor
television antennas or other ATSC modulators, set to different channels.
Connections include HDMI input plus feedthrough output, and modulated
RF output (female F) and loop through input. USB input is also provided
allowing the playing of media files from thumb drives and similar storage
devices, over the modulated output.
Overview:
Specifications:
Video Input Single HDMI with loop output
Input Resolution Auto detect up to 1080p / 60hz
USB Input Plays AVI and MOV from flash memory
Encoding Mode MPEG2
Audio Format MPEG-I Layer 2
HDMI Version V1.3 HDCP 1.2
Transmission Speed 10.2Gbps (max)
TDMS 0.5 ~ 1.5V p-p
DDC 5V p-p (TTL)
HDMI Cable Limit Input <5m (assumes 26AWG Ver1.3)
RF Output
HDMI Input
Output Format ATSC Standard
Output Signal Strength +25dBmV
Output Frequency Selectable 473 ~ 803MHz / 6MHz steps
Output Channel Selectable UHF CH14 ~ CH69
Transmission Mode 8VSB
Insertion Loss <2dBm (from feedthrough antenna input)
Latency 70ms typical
Loop Input / Output 75ohm female F type connectors
Dimensions 1-3/8" (H) x 9-1/2" (W) x 4-3/4" (D)
Power Requirements 5VDC, 2A - AC adapter included
MODEL 33-11980
MODEL #33-11980
www.mcmelectronics.com
Modulator Rear Panel
(4) External RF input
(5) Combined RF signal output
(6) HDMI loop output
(7) HDMI signal input
(8) 5VDC Power input
HDMI to ATSC
Modulator
ATSC
CH14:
473 MHz
(1) LCD function display
(2) Menu control keys / center key is ENTER
(3) MENU key
Modulator Front Panel
1
2
3
4
5
6
7
8
Controls and Connections
(1) Alphanumeric display shows output channel and frequency, and
(2) Menu control keys allow navigation of menus and selection of desired
(3) MENU key puts unit in menu-select mode.
allows flash memory file navigation.
media file on flash drive. Keys for UP/DOWN/LEFT/RIGHT plus
center key for ENTER.
(4) RF Input allows connection from existing RF source, typically an
external televsion antenna.
(5) RF output provides signal generated by the RF Modulator. Signal
strength at output is typically 25dBmV. If a signal is provided at the
input, it will be mixed with the modulated signal at this outpt.
(6) HDMI loop ouput provides exact signal to that sent to the HDMI
input. This is provided as a convenience to drive a local monitor if
desired.
(7) HDMI input accepts signal from source, compatible up to 1080p.
(8) 5VDC input for connection from included AC adapter.
from any source.
IInstallation and Use
Installation of this product is fairly straight forward. Simply connect
your HDMI source to the Signal Input (7) on the rear panel, and connect
standard coaxial cable from the RF output (5) to your digital television
receiver. This device converts the HD signal from the HDMI input to any
UHF channel from 14 through 69, to be received on any standard digital
television set. In this configuration, cable lengths of up to 600’ can
easily be used.
The output from this modulator can be split using standard CATV or
antenna signal splitters to drive multiple sets. It may also be amplified
as needed to drive very long cable runs or very high numbers of
televisions.
Combining with Existing Signal
In many cases it may be desirable to insert the signal generated from
this modulator into an existing cable coming from a CATV service
provider or external antenna. The external RF Input (4) makes this very
easy. Simply connect the external antenna to the (4) input. The channel
from this RF modulator will be added to the existing channels, making
your HDMI source simply appear as a new channel available on the
television. Note that in this case, it will be necessary to rescan the
channels on each television connected.
Note that in these cases it is very important that the channel selected by
the RF modulator be at least 3~4 channels away from any existing
channels to prevent interference between the modulator and the
channel.
Note that the channel designated number may not be the actual channel
frequency a station is transmitting on. Since televisions digital
changeover, many VHF stations were required to move to a UHF channel.
However for branding and marketing reasons, they wanted to retain their
original channel designation. For this, when the ATSC standard was
established, separate “virtual” and “actual” channels were created.
For example, existing channel 7 may actually be transmitting on a new
UHF channel 41, even though it is still called Channel 7. To check the
locations of available channels, and determine actual and virtual channel
designations, MCM Electronics recommends you visit the following
website: https://www.fcc.gov/media/engineering/dtvmaps.
Very Important
Combining Multiple Units
One key benefit of sending high definition AV material in this manner is
that it is easy to send multiple sources a great distance over a single
cable. Several RF Modulators may be connected together, set to different
channels, and then distributed to one or many television sets. Selecting
different sources is as easy as changing the channel on the set. Keep
in mind, just as mentioned above, if multiple channels are used, they
should be at least four channels apart, and four channels away from
existing channels inserted on the same cable.
If combining two or three RF modulators, it is likely fine that you simply
daisy chain the units together, using the RF input and output. Since
each unit creates 2dB of insertion loss, it is not recommended you do
this with more than three modulators. In those cases, commonly
available splitter/combiners should be used.
See the configurations shown on the next page.
