Videomitter MINIMITS User manual

Wireless Video Transmission
with no cables
Digital Data Transmission
for cleaner, sharper images
Privacy Pairing Function
keeps TX data private for GDPR compliance
Whisper Mode
“listens” for data in low power mode

Power Pass-through
camera & TX can share 1 PSU
Mini Size
Both RX & TX just H80 x W40mm with
no antenna
Digital, Reliable Transmission, up to 1Km!*
Typical Installation
*Additional antennas
required for 1Km
More info at:
videoMitter.com
NB: MINIMITS units are NOT compatible with
VideoMitter MK1, MK2 & LITE and can NOT be used together
Operating Manual - VideoMitter.com
Version 3.1
2020
Wireless Analogue
Video Transceivers!
Order Code:
MINIMITS
Email: [e-mail] Web: www.VideoMitter.com
Digital, Reliable Transmission, up to 1Km!*
Typical Installation
Operating Manual
Operating Manual
Version 3.1
2020
Order Code:
MINIMITS
Wireless Analogue
Wireless Analogue
Wireless Analogue
Video Transceivers!
Video Transceivers!

4. Remember if you are installing on a day
when the weather is good the signal will be
good. However, when it is raining heavily
microwave signals will be absorbed by the
rain and reduce the distance it travels. Always
keep the distance to a minimum and allow for
the use of additional directional antennas.
Rain or
snow
5. On some sites you may have other
RF equipment that can interfere with the
transmission unit. The best solution for a site
like this is fi tting directional antennas as they
help “block” out the interference.
Router or other
RF equipment
Directional
antenna blocks out
the interference
Things the professionals know!
Tip - different sites will affect the range.
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1. Microwave signals will not go through hills.
The density of the hill and water it contains in
the soil absorbs the signal.
2. Microwave signals will go through
branches of trees but remember that they will
be attenuated greatly by water. Vegetation is
full of water so fi t the best directional antennas
and/or avoid the trees.
3. In modern buildings sometimes the structure
is lined with “FOIL”. This can refl ect or “ground”
the wireless signal. Avoid transmitting through
such “shields”. If wiring is not an option then
try mounting the receiver unit on the exterior of
a building in an ABS box.
Foil backed
plasterboard

When you are fi tting multiple pairs of
VideoMitters on the same site, it’s really
important to have some knowledge of good
installation practice of wireless devices.
When you are installing any transmission
device, it’s always good practice to keep it
a reasonable distance away from another
transmission devices. This is because the signal
from one could overwhelm the other leading to
poor performance of one or both devices. Poor
performance may result in intermittent loss of
signal or non operation.
The VideoMitters are actually “transceivers”
this means that the “transmitters” and the
“receivers” BOTH transmit and means you also
need to keep pairs of receivers a reasonable
distance from each other.
The standard antenna that the VideoMitters are
supplied with is called an “Omni-directional”
antenna, this means it transmits in “all”
directions. So when two transmitters are close
to each other they will be transmitting signals
at each other as well as the receiver which
is why you need to keep them spaced apart,
spacing of 1-2 metres is required between
each transmitting device.
Professional installers of wireless equipment
would always use “directional” antennas so
that one transmitter is aiming its signal directly
at its own receiver and therefore the signal
is far less likely to interfere with another
transmitter located near it.
So on sites with multiple pairs of video
transmitters, it is always recommended to
use directional antennas for a professional
installation.
The added benefi t of the directional antennas
is that they will also add increased range
making the whole system more reliable.
The VideoMitter has 20 channels so
theoretically 20 pairs can be used per site
however it is only recommended to use 4
pairs per site to minimise any chance of
cross interference.
Adding directional antennas means the
transmitters next to each other don’t overwhelm
each other with erroneous transmission.
Two transmitters close together with omni
directional antennas, the signal from each can
overwhelm each other. Try keeping them at
least 1-2 metres apart.
1 - 2m
Using directional antennas
means the VideoMitters can
be fi tted closer together.
Things the professionals know!
Tip - getting maximum performance when fi tting
multiple pairs of VideoMitters on the same site.
Tip
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Read these instructions
before using the MINIMITS
as they contain vital
information...
Connections - TX/RX
Although identical in appearance each unit is
clearly marked on the face as:
TX - Transmitter RX - Receiver
The Transmitter unit has the following
connections
1. 2.1mm 12V D.C. power in connection
2. 2.1mm 12V D.C. power out connection
for power pass-through so camera and TX
can share 1 PSU
3. Video in connection via a BNC Lead
The Receiver unit has the following
connections
1. 2.1mm 12V D.C. power in connection
2. Video out connection via a BNC Lead
Both units have the following:
1. Antenna Connection (RP SMA Male Socket)
connects to extension cables or direct
connection antenna models
2. Reset Button
3. Red Power Indicator LED
4. Green Link Indicator LED
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RXTX
1 2
1 2 3 VideoMitter.com
POWER
RESET
LINK
3
1
2
4

Both the transmitter and receiver require a
power supply unit (PSU). The PSU for the
receiver and transmitter needs to be capable
of supplying 12V D.C. @ 190mA continuously.
Please keep this in mind if you are intending
to share a PSU for both the TX unit and your
chosen CCTV camera. When choosing any
PSU for CCTV equipment ensure that it is fully
regulated or you risk damaging the CCTV
equipment. A good quality supply such as
the “AntiHum” POW803 featured on page
14 is ideal.
Connecting the Video Powering the Units
Connect the video input feed to the video BNC
socket (1) on the Transmitter.
Connect the video output feed to the BNC
socket marked (2) on the Receiver.
Transmitter
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Receiver
1
2
Powering your Camera
1
1
To power your camera via power pass-through
connect the power out cable (1) on the
transmitter to your camera’s power in female
lead.

12v Input
For security purposes and to ensure that
transmissions are only shared by the receiver
connected, the transmitter is paired with
the receiver. This is done automatically by
randomly setting the same ID in both units
from an extensive ID range. Note that when
purchasing a transmitter and receiver they
are already paired and it is unlikely that
you will need to rerun the pairing process.
However if one of the units is replaced or
taken to another site, it will be necessary to
do this. This is a simple process that will take
only a few minutes.
Checking if the units are paired
1. Set the units up at least 2 feet apart.
2. Connect a 12V DC regulated power
supply to the Transmitter.
3. Connect a 12V DC regulated power
supply to the Receiver. The red Power
LED will light.
4. After 4 seconds, on both units, the Link
LEDs will light permanently if the units are
paired. (fi gure 1)
5. If the Link LEDs are not lit then the units
are not paired, then follow the instructions
on the next page.
Pairing Receiver with Transmitter
12v Input
fi gure 1
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If both Transmitter and Receiver Link LEDs
are lit permanently, the units are paired.
If the link LEDs are not both lit, then start the
pairing procedure again. If you press only one
pairing button on units that are already paired,
you do not lose the pairing. After 30 seconds it
will be paired with its original unit.
How to Pair Units
5. In the event
that no signal is
displayed after the
pairing process,
this means that the
transmitter and
receiver have failed
to pair within the
countdown period. Return to step 1.
Wait Signal...
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1. First ensure that a
monitor is connected
to the RX Receiver and
a video feed to the TX
Transmitter. Press the
RESET button down for
3 seconds on the RX
Receiver. The Link LED
will start fl ashing.
3. When pairing is
complete the monitor
will display
Pair OK
Pair OK
4. When the
transmitter and
receiver are
successfully paired
the monitor will
display the camera
picture and in the
top left hand corner
of the display screen a signal strength bar will
show up to 4 bars.
2. A countdown
on the monitor
then gives you 30
seconds to press the
pairing button on
the TRANSMITTER.
Hold the button
down until the led
starts fl ashing.
Please press pair key
On TX Side
30
Only one Transmitter and one Receiver
The pairing process
effectively works with
only one transmitter
and one receiver. It
will not allow two
or more receivers to
pair with the same
transmitters. If this is
attempted, the following is displayed on the
monitor connected to the receiver that is not
paired. Note that the pairing process pairs the
transmitter and receiver for security purposes,
so that only the data transmitted is seen by
the paired receiver. It does not determine the
channel used.
Wait Signal...
6. If no video signal
is displayed, check
that a video source
is connected to the
transmitter.
No Video Signal

If using several transmitters in the same
location try to keep them 1 metre or more
apart. Also it is good practice to fi t directional
antennas where multiple pairs are used.
The transmitter and receiver will give the best
results if there is line of sight between them.
Obstructions will affect transmissions if the
digital signal is corrupted, but provided the
receiver sees the digital signal you will always
get excellent quality results similar to the picture
quality generated by the camera. With digital,
it will always be a good picture or nothing. It is
therefore advisable to mount the transmitter and
receiver at an adequate height to avoid vehicles
and people.
This also applies to the “receivers” try and also
keep them 1 metre apart.
The units have wall mount fi xing lugs for internal
installation but for external applications, they
must be installed in a suitable IP rated plastic
enclosure. Do not use metal enclosures. If fi tting
the Transmitter or Receiver in an enclosure it
is not necessary to make a hole in the plastic
enclosure if it is large enough to house the
complete unit including the antenna. If not,
it is not recommended to have the antenna
protruding from a hole in the top of the
enclosure unless a watertight seal can be made
between the antenna and box. It is therefore
recommended to mount the unit so that any
hole cut for the antenna is made in the base of
the enclosure and a good silicon seal made to
protect from water/moisture (fi gure 2).
In some instances where you can not achieve a
clear line of sight, you may need to fi t a more
powerful antenna than those supplied free with
the kit. A range of both internal and external
models are available and shown later in this
manual. Whilst different models are available
to suit different installations, please note the
same model of antenna must be fi tted at both
TX & RX ends.
Once connected, the RX unit will overlay a signal
strength bar on the transmitted picture. This is
a useful indicator if you will be inputting the
transmitted signal to a device other than a
monitor as whilst a monitor will display a signal
strength as low as 0.7V p-p, devices such as
DVRs, quads and switchers require a stronger
signal of 1V p-p to display an image.
Our Recommended System Design...
fi gure 2
The TX is mounted in an external weatherproof box and only has to send its signal “line of sight”
through air. There is little to attenuate the signal and good results should be achieved. The external
antenna in the receiver helps “pull-in” the signal from the transmitter.
Installation Procedure
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Camera
or Video
Signal
Use cable where possible Use cable where possible
TX RX
Transmitters housed externally
in a plastic box with external
antennas. TV, DVR,
Switcher or
Quad
TX & RX mounted high above
the height of vehicles etc.
Line of Sight
What is line of sight?
This is when the TX and RX can
“see” each other with no obstacles
in between them.

When using the units externally, a line of sight
will always achieve the best results. Line of
sight means the units can visibly see each other
without any obstructions. Remember whatever
is in the way of the line of sight between the
two units will attenuate the signal. A building,
people, hills or a mound of earth for example
will reduce the overall range at which a good
picture quality is attainable. You can often
get good or near lines of sight, by taking
your power and video signals to the ends
of facing buildings using cabling and then
transmitting between the two buildings (rather
than through them) using the TX & RX. If you
are going to put the units in external enclosures
make sure the enclosures are the plastic/ABS
type, as these will allow the radiated signal
to pass through them. Better still, put the
transmitter and receiver in the box and put an
The VideoMitter transmitter and receiver are
a new generation of digital equipment, that
convert an analogue signal to digital format
and transmit it to the receiver wirelessly, where
the receiver decodes the video back into an
analogue output. The analogue output can then
be taken to the DVR or monitor.
The advantage of using digital is that you
get 100% interference free video quality. As
digital signals are binary codes of 1’s and 0’s,
providing the video signal can be detected,
you should be able to get a high quality,
interference free video signal.
The diagram below shows how three sets
of VideoMitters can provide a wirefree
connection to another piece of equipment. It
is recommended up to 4 pairs per site can be
utilised providing superior digital image quality
from that of analogue transmission equipment.
Whilst transmission distances can be affected
due to the building construction, extra video
gain can be produced using an improved
antenna detailed later in these instructions. As
previously stated ensure the groups of receivers
and the groups of transmitters are installed at
least 1 metre apart.
Installation Tips
General Information
external antenna outside the box. Whatever
you do you must not put the receiving or
transmitting antenna in a metallic box as
this will adversely affect the products and
their performance.
This also means that you must not put either
device in a metallic CCTV housing.
Mount the units at a reasonable height. If you
mount both units at over 2.5 metres indoors,
people walking around will not get in the
line of sight of the two units and attenuate
the signal.
Similarly when using the units externally, mount
them above the height of any passing cars
and lorries, which could drastically attenuate
the signal.
Note that metal objects can completely screen
a wireless signal, so avoid metal gates and do
not install in a metal cage such as a lorry or
lift, unless you are able to position an extension
antenna on the outside. Also be aware that
the closer an obstacle to the transmitter, the
weaker the signal will be.
Therefore it is not advisable to place the
transmitter directly behind a wall. Whilst the
VideoMitter may work indoors through walls
and offi ce constructions, there are no easy
ways of confi rming this, so use the signal
strength bar and attach a pair of antenna
to improve transmission quality if necessary.
Ensure that if fi tting multiple transmitters and
receivers, that the transmitters are more than
1m apart.
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These transmitters work over the 2.4Ghz band
and are paired to a receiver to provide
security and signal quality. The pairing selects
a random ID code from an extensive ID range
and is shared only by the transmitter and
receiver pair. Therefore the wireless video
signal cannot be received by any receiver
other than its own. It should therefore only
be necessary to rerun the pairing procedure
if either the transmitter or receiver has to be
replaced.
Unlike analogue transmitters, the VideoMitter
has no dipswitches for selecting transmission
bands in the 2.4GHz range. It uses an
automatic channel hopping feature to select
a clear usable channel and this channel may
change frequently dependent on the traffi c
detected on the channel band. Therefore
spurious use by other equipment e.g. WiFi,
will trigger the unit to search for another
available channel seamlessly. The channel
hopping facility also allows a number of
paired VideoMitters to be installed at the same
location. The total number of channels that can
operate at one site is a maximum of 20. Note
that this number is dependent on other traffi c
density so the number may be less.
Always ensure that the transmitter and receiver
have line of sight. Any obstacles will have
an effect on the video signal. Line of sight
means that there are no materials between
the transmitter and receiver, only air. Placing
units behind glass is not line of sight. Metal
can completely block a transmission, whereas
non-metallic obstacles will introduce a certain
amount of signal attenuation. Providing
this attenuation does not corrupt the digital
transmission, the results should always be very
good. Note that dense material close to the
transmitter will have the greatest effect.
Increasing signal gain can be accomplished
by fi tting an improved antenna. These are
described in more detail, later in this instruction
manual. Without line of sight, no guarantee
can be given on transmission distance.
Q.1 I cannot pair the Transmitter
and Receiver. I keep getting a
“No Video Signal” displayed.
A.1 If no video signal is displayed but the
Link LEDs are permanently lit on both the
Transmitter and Receiver, the units are paired.
The No Video Signal is displayed if the units
are setup without a video input. Ensure a video
or camera signal is connected to the TX input.
Q.2 I am getting No Video Signal or the
video stream is very slow.
A.2 If the distance is within range but you
do not have line of sight, then the problem
may be due to obstacles screening the video
signal. Metal is the main substance that can
completely screen a wireless signal, therefore
avoid completely metal constructions. Metal
gates, plasterboard lined with aluminium
sheeting, metal cages or vehicle cabs or lorries
etc. can also screen the video signal. As the
VideoMitter pack will either provide good
video quality or nothing at all, you can either
move the equipment to provide line of sight,
use an external antenna and extension lead
that will allow line of sight or you can try a
more powerful antenna. You will fi nd that thick
brick or stone wall constructions will reduce
signal strength and the closer they are to the
transmitter the greater their effect.
Q.3 In order to reduce costs, can one pair
be used to transmit the output from a DVR
that has 16 cameras connected to it?
A.3 Yes this will transmit whatever the DVR is
outputting on the CVBS Spot Output.
Troubleshooting
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