PAGE 10
User Manual WS 19 / March 2011 © ASL Intercom BV
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10.2 Half Duplex Mode (for WS-19 single channel beltpacks only).
This mode allows more than one WS-19 beltpacks
on the same TX/RX channel. However, only one
of the WS-19 beltpacks can talk at a time and
have a full duplex connection. For as long as one
of the beltpacks has a full duplex connection (talk,
listen and call), the other beltpacks are able to
listen to the signals coming from the base station,
but are not able to call or talk.
In case of half duplex use of WS-19 beltpacks
whilst the corresponding TX/RX module in the
base station is connected to a wired party line
intercom system, the following has to be taken
into account:
The side tone prevents (when properly adjusted)
the microphone signal coming from the “talking
beltpack” to return to the beltpacks. The “listening
beltpacks” do not hear the “talking beltpack”.
To solve this, the side tone trimmer of the
concerning TX/RX module should be turned down
(fully counter clockwise). But there is a drawback:
the user of the “talking beltpack” will hear his own
voice with a delay of 24 msec and via the OWN
VOICE link in the beltpack (no delay). The effect
of hearing your own voice twice (with and without
delay) can be diminished by turning down the
OWN VOICE trimmer. The “listening beltpacks”
will not notice the delay.
11.0
WARRANTY
ASL Intercom warrants this unit to the original
end-user purchaser against defects in work-
manship and materials in its manufacture for a
period of two years from date of shipment to the
end-user.
Faults arising from misuse, unauthorized
modifications or accidents are not covered by this
warranty.
If the unit is faulty, it should be sent in it's original
packing to the supplier or your local ASL dealer,
with shipping prepaid. A note must be included
stating the faults found and a copy of the original
suppliers invoice.
12.0
TECHNICAL SPECIFICATIONS
WS-19 Power Consumption
Current (at 9 V DC):
200 mA quiescent
240 mA signaling
260 mA at max. signaling
Mic. Pre-amp
mic. impedance: 200 ohms
gain: 40 dB - 70 dB
presence filter: +6 dB at 5 kHz
V electret mic: +4.5V DC
Headphones Driver Amp
max. load: 200 ohms
max. output level: 6.8 Vrms @ 200
Ω
max. output power: 0.23 Wrms @ 200
Ω
Buzzer
max. SPL: 65 dBA
WS-19 Dimensions & Weight
width:
88 mm
height:
49 mm
depth:
141 mm
weight:
650 grams
System Specifications
transceiver frequency: 2400
–
2483.5 MHz
transmit power: 10 mW E.I.R.P.
number of channels: 8
channel separation: 7 MHz
dynamic range: 70 dB
supply voltage: +7.2 V DC (4.2 V to 9 V)
audio freq. response: 200 Hz-12 kHz (-3dB)
0 dBu is defined as 775 mV into open circuit
ASL reserves the right to alter specifications without prior notice.
