Canford HS120 Series Instruction manual
technical data
CANFORD AUDIO PLC
CROWTHER ROAD, WASHINGTON
TYNE & WEAR, NE38 OBW. UK
admin 0191 418 1000
sales 0191 418 1122
fax 0191 418 1001
02-120(Issue 3)11/93
HS120 SERIES HEADSET STATIONS
27-121 TECPRO HS121 Fixed headset station, single circuit
1Connecting the station to the system
HS121 single circuit station - Use 2-core screened
cable and connect as shown in diagram (1).
HS122 multi circuit station - Use multi-pair
individually screened cable for best performance,
(overall screened cable will work but may suffer
crosstalk between circuits when used over long
distances) and connect as shown in diagram (2).
Wiring instructionsforalltypesshouldbeattached
to the station.
2Basic Operation
HeadsetOperation-Tecpro,orcompatibleheadsets
should be wired as in diagram (3) and plugged into
the front panel 4-way XLR connectors.
Controls
MicON/OFF-locatedtotheleftofthesignallight
switch, this is a latching key which activates the
headsetmictospeaktothesystem. Themicrophone
amplifier gain is factory set to suit most dynamic
headset microphones. It contains a
limiter/compressorwhichpreventssystemoverload.
The headset will listen in either position of the MIC
ON/OFF switch. The volume control adjusts the
headset listen level.
3Sidetone Adjustment
The level of your voice in your headset is called
"sidetone". The required level can be gained by
turning the sidetone control with a small
screwdriver. It is factory set to suit most
applications.
4Signal Light Operation
The SIGNAL pushbutton illuminates a lamp in the
other outstations connected to your circuit. It is
used to attract the attention of a user that has a
headset removed or volume level turned right down.
Signalling to you is shown by illumination of your
light.
Note: This signal light capability can be used for
otherspecial purposes suchas activating transmitto
aradio system connected via an AD913 Radio
Interface Adaptor.
5Use with Accessory Microphone
WhenanLSM1orequivalentmicrophoneisplugged
into the front panel, instead of a headset, the unit
becomes a hands-free paging system. In this case
the Mic ON/OFF switch activates the plug-in mic.
6Clear-Com Compatibility
Tecpro stations are completely compatible with
Clear-Com stations. Any Tecpro stations added to
Clear-Com will function as their Clear-Com
equivalents. However, Clear-Com stations have a
lowerbridging impedance andwill degrade aTecpro
system slightly due to a reduction in side-tone
stability incurred when a Clear-Com outstation is
used in a Tecpro communications system.
technical data
CANFORD AUDIO PLC
CROWTHER ROAD, WASHINGTON
TYNE & WEAR, NE38 OBW. UK
admin 0191 418 1000
sales 0191 418 1122
fax 0191 418 1001
02-120(Issue 3)11/93
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