Adastra TGM4 2-way Counter-Top Intercom User Manual
- June 2, 2024
- AVSL
Table of Contents
TGM4
2-way Counter-top Intercom
Caution: Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty
Introduction
Thank you for choosing the TGM4 counter-top intercom for your through-glass or
through-partition communications installation. This system is easy to install
and use and offers flexibility to enable 2-way conversation in a variety of
service applications.
Please read this manual for correct operation and keep for future reference.
Warning
To prevent the risk of fire or electric shock, do not expose any components to
rain or moisture. If liquids are spilled on the casing, stop using
immediately, allow unit to dry out and have checked by qualified personnel
before further use. Avoid impact, extreme pressure or heavy vibration to the
case.
No user serviceable parts inside – Do not open the case – refer all servicing
to qualified service personnel.
Safety
- Check for correct mains voltage before connecting the power adaptor
- Use only the power adaptor provided or an identical replacement (9Vdc, 300mA+)
Placement
- The TGM4 main unit is a free-standing unit with a gooseneck microphone.
- The microphone is not detachable.
- Ensure that the gooseneck microphone is positioned to hear the operator clearly
- The client speakerphone can be positioned on a flat surface or upright on a wall or window.
- Ensure that the speakerphone is positioned to hear the client and be heard by the client easily.
- It may be necessary to drill holes or channels to feed the speakerphone cable and/or power cable.
Cleaning
- Use a soft cloth with a neutral detergent to clean the housing as required
- Use a vacuum cleaner to clear apertures and controls of any dust or debris build-ups
- Do not use solvents for cleaning the unit
Connections & Controls
- Gooseneck microphone
- Main unit loudspeaker
- INSIDE main unit speaker volume control & LED
- OUTSIDE client speaker volume control & LED
- Power on/off switch & LED
- 9Vdc power inlet
- Client speakerphone connection 3.5mm jack
- Recording output 3.5mm stereo jack
Setting up
The TGM4 comprises a main unit with integral gooseneck microphone for the
operator and a speakerphone for the client side of the window or partition.
The main unit should be free-standing on a surface close to the operator so
that the gooseneck microphone can be positioned to easily pick up the speech
of the operator. This unit is powered using the 9Vdc power adaptor provided.
With the power switch (5) in the “off” position, connect the plug-top adaptor
to the 230Vac mains supply and the DC connector into the 9Vdc inlet on the
rear panel of the TGM4 (6).
The client speakerphone should be positioned so that the client can hear the
output of its miniature loudspeaker and the internal microphone can pick up
the speech of the client. This may be flat on a counter-top or upright on the
dividing window or partition. A keyhole on the rear of the speakerphone
allows it to be fixed with a screw if needed or double sided self-adhesive
pads may be used.
The lead from the speakerphone is terminated with a 3.5mm plug and must be fed
through the partition to the main unit and connected to the socket labelled
“Speaker” (7)
If the intercom conversations are to be recorded or monitored, the TGM4 has
another 3.5mm socket which provides a line level audio signal of both
gooseneck and client microphones that can be connected to a recording device
or other audio equipment. This socket is wired in stereo and the gooseneck
microphone is fed to the right channel and the client speakerphone is fed to
the left channel.
Operation
Turn both INSIDE and OUTSIDE volume controls (3, 4) fully down (anticlockwise)
and switch the power on to the main unit (5) – the LED power indicator will
light to show that power is on. Gradually turn the OUTSIDE volume control (4)
clockwise and speak into the gooseneck microphone, checking for output from
the client speakerphone until the volume is adequate for the surroundings. Do
the same for the speakerphone by gradually turning the INSIDE volume control
(3) clockwise and speaking close to the speakerphone until it can be clearly
heard through the loudspeaker of the main unit.
During operation, it may be necessary to adjust these volume controls as the
ambient noise changes.
Each Volume control has a corresponding LED to indicate the sound that its
microphone can detect (3, 4). If the client cannot hear the operator, increase
the OUTSIDE volume control (4). If the operator cannot hear the client,
increase the INSIDE volume control (3). The TGM4 has a suppressor circuit to
help avoid each unit from hearing its own speaker which could result in
feedback. This circuit reduces the sound of one microphone as the other is
being used, delivering the 2-way conversation in a controlled manner. The
operator or client do not need to activate any switches and the process is
completely hands-free. Only occasional volume adjustments may be needed
from the operator. It is helpful if the main unit and speakerphone units are
not positioned toward each other or in very close proximity. If there is
feedback (howling or squealing caused by a microphone hearing its own output
through a speaker), one or both of the volume controls may need to be turned
down to mitigate this effect.
When not in use, turn down the volume controls and switch off the power. If
not being used for long periods, unplug the 9Vdc adaptor from the mains
supply.
Specifications
Power supply : 9Vdc, 300mA min. (adaptor supplied)
Controls : 2 x volume control & power on/off
Connectors : 3.5mm TRS speakerphone, 3.5mm stereo record out
Lead length : 1.6m (hard-wired to speakerphone)
Dimensions: main uni t : 158 x 87 x 46mm
Dimensions: microphone : 285 x 113mmØ (fixed to main unit)
Weight: main unit : 347g (inc. microphone)
Dimensions: client speakerphone : 91 x 77 x 23mm
Weight: client speakerphone : 87g (inc. lead)
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the
product is classed as Electrical or
Electronic equipment and should not be disposed with other household or
commercial waste at the end of its useful life.
The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted.
Copyright© 2020. AVSL Group Ltd.
Adastra TGM4 2-way Counter-Top Intercom User Manual – Optimized
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Adastra TGM4 2-way Counter-Top Intercom User Manual – Original
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