ASL INTERCOM PRO Series Gebruikershandleiding - Pagina 7

Blader online of download pdf Gebruikershandleiding voor {categorie_naam} ASL INTERCOM PRO Series. ASL INTERCOM PRO Series 11 pagina's. Single channel beltpack
Ook voor ASL INTERCOM PRO Series: Gebruikershandleiding (15 pagina's)

Pagina afdrukken

8.0

PARTY LINE, TECHNICAL CONCEPT

ASL's PRO Series offers a complete two way ('full

duplex') communications system.

Users of the system are connected via a 'party line'.

Master stations (with built-in power supply), beltpacks,

speaker stations and power supplies are

interconnected via standard microphone cable. One

wire is used as an audio line, one as a power line and

the screen of the cable functions as earth/return.

Current drive is used for signal transfer. Each station

utilises a current amplifier to amplify the microphone

signal and place it on the common audio line where,

due to the constant line impedance (situated in the

power supply between XLR pin 3 and 1), a signal

voltage is developed which can be further amplified

and sent to headphones or loudspeakers.

This principle has three advantages:

the use of a single audio line allows several

stations to talk and listen simultaneously.

due to the high bridging impedance offered by

each station, the number of stations 'on line' has

no influence on the level of the communications

signal.

power and audio to the intercom stations use the

same cable.

The Call signal is also sent as a current on the audio

line. It develops a DC potential over the line impedance

which will be sensed by each station and interpreted

as a Call signal.

9.0

GUARANTEE

This unit is warranted by ASL Intercom to the original

end-user purchaser against defects in workmanship

and materials in it's manufacture for a period of one

year from date of shipment to the end-user.

Faults arising from misuse, unauthorised

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.

THIS PRODUCT WAS DESIGNED, DEVELOPED AND

MANUFACTURED BY:

AMPCO SOUND LAB BV

MAARSSEN (UTRECHT) HOLLAND.

10.0 TECHNICAL SPECIFICATIONS PS 19M

POWER CONSUMPTION

current (at 30 V DC)

135 mA at max. output + signalling

MIC. PREAMP

mic. impedance

gain

40 dB - 70 dB (adjustable internally)

presence filter

frequency response

V electret mic

HEADPHONES DRIVER AMP

max. load

max. output level

max. output power

INTERCOM LINE DRIVER

max. output current

output impedance

SIDETONE

rejection

BUZZER

max. SPL

DIMENSIONS AND WEIGHT

width

height

depth

weight

GENERAL SYSTEM SPECIFICATIONS

intercom line impedance

intercom line audio level

dynamic range

call send signal

call receive signal threshold

supply voltage

mic mute power interrupt time

Note: 0 dBu = 775 mV into open circuit

ASL reserves the right to alter specifications without

further notice.

25 mA quiescent

40 mA signalling

200 ohms

+6 dB at 5 kHz

200 Hz - 13 kHz (-3 dB)

+9 V DC

200 ohms

14 V rms (200 ohms)

0.5 W rms (each headset can)

3 mA rms

> 150 Kohms

0 - 30dB adjustable

114 dBA

90 mm

38 mm

124 mm

295 g

350 ohms (1kHz)

2.2 Kohms (DC)

nom. -18 dBu

max. +4 dBu

80 dB

+2.8 mA

+2.4 V DC

+30 V DC (12 V to 32 V)

0.1 sec