Labgear EM7994 User manual
EM7994 - 4 Channel HD/CVBS to DVB-T
encoder modulator
The EM7994 takes four signals from HDMI or CVBS sources and encodes the data in to MPEG transport streams
and outputs them using COFDM modulation as a DVB-T multiplex. The new signals can be combined with o-air
signals using the loop-through RF connections and then fed into your TV system for distribution to every TV set.
Features:
• Ideal for HDMI sources such as HD satellite receivers, Blu-Ray™ players and PC’s
• Equally at home with CVBS signal sources including security cameras
• Supports HD input resolutions up to 1080p
• Easy to navigate menu screen makes set-up quick and simple
• Install multiple units onto your TV system
Connections:
Applications:
• Monitor security cameras on domestic or communal TV systems
• Distribute HD images for high impact video displays
• Add extra channels to multi dwelling TV systems
• Information channels in hotels or public spaces
Safety:
To prevent re or electrical shock, don’t expose the unit to rain or moisture. Always use the 12VDC power supply
provided. Using a higher voltage will damage the unit and invalidate the warranty. Do not connect the device
to the power if the power cord is damaged. Do not connect the unit to the mains until all cables have been
connected correctly. Do not cut the power cord. Do not cover the ventilation slots. If the unit has been stored in
cold conditions allow it to warm to room temperature before connecting to the mains.
NOTE: Multi dwelling systems must be earth bonded using a minimum 4mm copper cable in accordance with
the CAI Standard.
Mounting and Installation:
Best mounted in on a vertical surface with the connectors at the bottom. Use the slots on side of the casing to
screw the unit onto a stable surface and allow at least 10cm space around the unit for free ventilation.
Before commencing set-up check what channels or frequencies are being used for local o-air transmissions and
any other devices on the system and decide which unused channel you are going to use.
• Connect the HDMI or CVBS source to the correct input
• Connect the RF OUT to the input to the TV system directly or via a wideband combiner
• Connect the aerial to the RF IN (unless if you are using a wideband combiner)
• Plug the power supply into the mains socket and switch ON
The encoder will power up and display the factory pre-set output channel and frequency. The HDMI or CVBS indi-
cator will light up dependant on which has been selected. Press OK to access the Main Menu and start the set-up.
1
Function Flow Chart
MPEG-4
ENCODER
MODULATOR
DVB-T COFDM
RF OUT RF IN
TV
AERIAL
TV
SYSTEM
POWER
SUPPLY
12VDC
DIGITAL
SIGNAL
HDMI
COMBINER
LOW LOSS
ANALOGUE
SIGNAL
CVBS+Stereo
RF OUT
Combined
Signal
RF IN Power
Supply
12VDC
HDMI
Source
2
CVBS & Stereo
Source
2
CVBS & Stereo
Source
1
HDMI
Source
1
Software
Upgrades
CVBS & Stereo
Source
3
CVBS & Stereo
Source
4
HDMI
Source
1
HDMI
Source
4
Power
Switch
EM7994 - Functions & Operation
SD
Device
SD
Device
HD
Device
HD
Device
Older Sky boxes
require a single feed
each from
the multiswitch
Sky + & Sky+
HD boxes require
a twin feed
PSW132
Suitable for combined
Sky, TV and
Radio outlet
TV
FM/DAB
SAT
8dB Gain
Ideal for
LONG
runs 20-40m
PSW241
Suitable for combined
Sky+, Sky+HD, TV
and Radio outlet
TV
FM/DAB
SAT1
SAT2
0.5dB Gain
Ideal for
SHORT
runs 5-20m
4.5dB Gain
Ideal for
MEDIUM
runs 15-30m
Earth
Terminal
Stepped
Outputs
to Wall
Outlets
Q
Q
Quad/Quattro
Compatible
SD
Device
HD
Device
HD
Device
SD
Device
Installing multiple units onto a TV system
The EM7994 has a low-loss combiner between the RF IN and RF-OUT and it is therefore possible to not only
combine the o-air signals with your new channel but to“daisy chain” a number of units to add more signals.
With more than 2 units on a system you may get a better signal balance if you combine all units and the aerial
using a low loss combiner splitter like the 4-way FJU704.
2
Please Note
HD source not working? If you select the factory reset you may disable the HDCP compatibility needed for some
HD sources. To reactivate press RETURN and hold for 3 seconds.
USB Port
The USB port is soley for rmware/software updates (if available). Visit our website at www.labgear.co.uk for
news of any available updates.
NO DESCRIPTION FUNCTION
➀LCD Screen Video display
➁HD/CVBS LEDs HD (Red) / CVBS (Green) 1 to 4 signal indicator lights
➂PWR LED Power indicator light
➃RETURN Key Return submenu and save settings
➄Key Switch settings in menu or cursor left
➅Key Switch settings in menu or cursor right
➆Key Change the frequency point or cursor up
➇Key Change the frequency point or cursor down
➈OK Key Conrm the current operation
Screen Indicators and Controls ➂
➀ ➅
➁
➈➇➆➄
➃
Typical TV/Satellite Installation
EM7994 Setup
3
Before you start check what frequencies or channels are being used for local o-air transmissions and other
devices on the system and decide which un-used channel you are going to use.
EM7994 - Specications
For further information or any queries please contact
Customer Careline: 08457 573479
(Local rate – UK only)
Technical Support: www.labgear.co.uk/support
Waste electrical products should not be
disposed of with household waste. Please
recycle where facilities exist. Check with
your Local Authority for recycling advice.
© Philex Electronic Ltd. 2017 V1
4
Modulator Section
DVB-T
Standard DVB-T COFDM
Bandwidth MHz 6, 7, 8
Constellation QPSK, 16QAM, 64QAM
Code rate 1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval 1/4, 1/8, 1/16, 1/32
MER 35dB
Frequency range 50-860MHz select by Channel No.
Output Level 70-100dBuV step 1dBuV
Output Impedance 75Ω
Encoding Section
HDMI Encoder HDCP1.3 Compliant
Video
Compression H.264 - bitrate 5-15Mb/s
Interface HDMI x 4
Input Output
Resolution
1920x1080@60p
1920x1080@50p
1920x1080@60i
1920x1080@50i
1280x720@60p
1280x720@50p
1920x1080_50p/1920x1080_60p
1920x1080_50i/1920x1080_60i
1280x720_50p/1280x720_60p
Aspect Ratio 4:3, 16:9
Bit rate 5-15Mbps
Audio
Compression AAC-LC / MPEG1-L2– bitrate 128-320 Kb/s
Sample Rate 32kHz / 44.1 kHz / 48 kHz
Bit rate 64/128/192/256/320 kbs
Version HDMI 1.4 (1.3 compatible)
CVBS Encoder
Video
Compression H.264 - bitrate 5-15Mb/s
Interface CVBS 3 phono x 4
Input Output
Resolution
576iPAL 480iNTSC
720x576@50i /720x480@59i/60
System
Management LCD + control keys
Language English
LCN Insertion Yes
Upgrade Micro USB
General
Power supply 12V5A
Dimensions 280mm (W) x 203mm (D) x 61mm (H)
Weight 1.56kg
Operating temp. 0-45˚ C
System
General
Labgear Reserve the right to modify
their designs or specications, In the
light of future developments, without
prior notice. Performance gures quoted
are typical and subject to normal
manufacturing and service tolerances.
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