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
1
Connecting 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
instructions for all types should be attached
to the station.
2
Basic Operation
Headset Operation - Tecpro, or compatible headsets
should be wired as in diagram (3) and plugged into
the front panel 4-way XLR connectors.
Controls
Mic ON/OFF
- located to the left of the signal light
switch, this is a latching key which activates the
headset mic to speak to the system. The microphone
amplifier gain is factory set to suit most dynamic
headset microphones. It contains a
limiter/compressor which prevents system overload.
The headset will listen in either position of the MIC
ON/OFF switch. The volume control adjusts the
headset listen level.
3
Sidetone 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.
4
Signal 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
other special purposes such as activating transmit to
a radio system connected via an AD913 Radio
Interface Adaptor.
5
Use with Accessory Microphone
When an LSM1 or equivalent microphone is plugged
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.
6
Clear-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
lower bridging impedance and will degrade a Tecpro
system slightly due to a reduction in side-tone
stability incurred when a Clear-Com outstation is
used in a Tecpro communications system.