CAMBRIDGE Qt Conference Room Edition, ST 1000 Installation And Operation Manual
Qt® Conference Room Edition
A speech protection system designed for conference rooms
Installation and Operations Guide
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Qt Conference Room Edition Installation and Operations Guide
SAFETY
Safety
Important Safety Instructions:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water. Indoor use only.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including ampliers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third grounding
prong. The wide blade or the third prong is provided for your safety. If the provided plug does not t
into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the apparatus.
11. Only use attachments/accessories specied by the manufacturer.
12. Unplug this apparatus during lightning storms or when unused for long periods of time.
13. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or
objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.
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Qt Conference Room Edition Installation and Operations Guide
Packing List
The package includes:
▪ 1 Wall-mounted ST 1000 control module
▪ 1 4-gang adaptor plate for control module (used for 3-gang EU/UK boxes)
▪ 2 Automatically lighted privacy signs
▪ 2 1-gang adaptor plate for privacy signs
▪ 1 Power supply
▪ 8 Qt Emitters
▪ 7 16 ft audio cables
▪ 1 50 ft homerun audio cable
▪ 2 50 ft two-conductor cables for privacy signs
▪ 1 Hole saw
▪ 4 Privacy sign 6/32” x 3/8” screws
▪ 8 Wall plate adapter 6/32” x 3/8” screws
▪ 4 Control module back panel 6/32” x 5/8” screws
PACKING LIST
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Qt Conference Room Edition Installation and Operations Guide
PLANNING THE SYSTEM
Emitter spacing and ceiling height
Spacing between emitters generally should follow the same rules as for other CSM direct eld masking
systems, i.e. should be not less than the ceiling height above the nished oor. The English dimensions
are based on America drop ceiling tile sizes (24x24”, 24x48”). The metric dimensions are based on
international tile sizes (300x300mm).
Ceiling Height
Ceiling heights less than 10 ft. (2.4m)
Ceiling height is 10 up to 12 ft. (3m)
Ceiling heights 12 ft. and above (3.6m)
8 ft. spacing (2.4m)
10 ft. spacing (3m)
12 ft. spacing (3.6m)
Spacing
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Qt Conference Room Edition Installation and Operations Guide
INSTALLATION
Installation
Pre-wiring
Homerun
The 50’ CAT distribution line supplied with the base kit should be sufcient as the
homerun for almost all installations. It may be replaced by a longer CAT cable
to the rst emitter without excessive loss or impact privacy signal level difference
between the rst and last emitters on the line. Theoretically a CAT coupler and
additional cable could be used rather than a longer homerun but this is not the
preferred method due to the coupler most likely being located in an inaccessible
and/or undocumented location, possibly complicating future servicing.
Emitter cable (interconnects) conguration
The interconnects should be connected the same as in a conventional CSM Qt
masking system, i.e. in a series serpentine layout. This will assure that adjacent
emitters are on different channels to minimize any phase interference issues.
CSM’s Quiet Technology uses four distinct non-correlated sounds that repeat every fourth emitter
automatically. The homerun from the controller to the rst emitter may be concealed in a wall stud
space.
How CSM emitter cabling works – homeruns and daisy chaining
Emitters on each line are daisy-chained in series during installation. Each emitter has passive internal
logic which rolls over its input channel to a different channel at its output port. Thus every fourth emitter
is actually operated in parallel with the rst.
Four Channel Distribution
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Qt Conference Room Edition Installation and Operations Guide
INSTALLATION
Power supply
In most cases the 24v power supply will need to be located remotely, with a cable run from the power
supply to the controller. In some cases a wall plate such as the Vanco 120614X permits in-wall running of
the power wire to an AC plug on the exterior of the wall.
The power supply wire may be extended using appropriate cable and connectors. The cable should be
UL rated and plenum rated if routed through any plenum space.
Audio Input
Optionally the QtCRE includes an audio input usable for music or paging. The input is fully functional
regardless of front panel or contact closure control. Therefore, the system may be used for music or
paging even when masking is muted or off.
Balanced Audio Input: (Most often, but not always characteristic of paging
systems.) Connect signal wires to + and - at the input. Connect the shield to
GND at the audio source.
Unbalanced Audio Input: (Typical of music systems.)
▪ Mono Signals: Connect the mono signal wire to both L and R (split
the wire) on the block. Connect the ground wire to GND.
▪ Stereo Signals: Connect the respective signal wires to L and R on the
block. Connect the ground wire to GND.
Contact closure input
This terminal can be used either for remote triggering by a Crestron, AMX, or other control system.
In either case, the contract closure takes priority over the front panel control settings. Contact closure
ramp speed can be set separately from front panel control ramp speed.
Trigger output
The trigger output provides nominally 5VDC when the system is operating at Normal level, for use
in triggering other devices or to provide an acknowledgment signal back to an external automation
system like a Crestron. Note that upon initiation of a downward ramp event, deactivation of the trigger
signal will lag the completion of the downward ramp by several seconds in addition to the ramp down
time parameter congured on the ST1000 control module. During a ramp-up to Normal operating level
event, the full and consistent activation of the trigger voltage may not be complete until the Normal
operating level is reached. Control system programs should be written to anticipate and accommodate
this behavior.
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Qt Conference Room Edition Installation and Operations Guide
USB connection
(special purpose
see page 14)
Sign is
active
USB connection
in use
INSTALLATION
Note that the small switch on the side of the controller must be set to the “up” position (closer to the
top of the case) for the lights to work. The “down” setting enables the external USB jack, used for
rmware updates or for the optional Bluetooth dongle supplied with the Qt100 iPad app.
Connection to privacy signs
Run a separate cable from the controller mounting location to each lighting location. Do not daisy chain
signs as this may cause the lights to be of different brightness. Two 50 ft. (15.2m) plenum rated cables are
provided with the kit.
Sign 1 +
GND -
Sign 2 +
GND -
Control +
GND -
Note: Wiring nomenclature is
located under the removable
terminal block connector.
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