Asl intercom PS 260 User Manual

PRO SERIES

USER MANUAL

FOR THE

PS 260

DUAL CHANNEL AUDIO INTERFACE

CONTENTS

1.0 GENERAL DESCRIPTION ...................... 3

2.0 UNPACKING ................................. 3

3.0 INSTALLATION ............................... 3

4.0 FRONT PANEL CONTROLS ..................... 4

5.0 REAR PANEL CONNECTORS ................... 5

6.0 SUM OUTPUTS ............................... 5

7.0 CABLING .................................... 6

8.0 PARTY LINE, TECHNICAL CONCEPT ............. 7

9.0 GUARANTEE ................................. 7

10.0 TECHNICAL SPECIFICATIONS .................. 7

User Manual PS 260 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.

2

User Manual PS 260 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.

1.0 GENERAL DESCRIPTION

The PS 260 is designed to interface the ASL intercom The PS 260 includes two separate interfaces which are
system (party line) to external audio equipment or 4-wire completely identical. Each interface is power supplied via
communication systems. the intercomline.

For example a fixed cabled (4-wire) intercom system can The two-stage sidetone circuit (level, hi) allows you to
temporarily be extended with a portable ASL set, for use obtain an input/output separation better than 30 dB from
on location or a (4-wire) camera CCU can be connected to 20Hz to 20KHz.
the ASL intercom system.

The built in testtone generator helps you to adjust or check
Other applications include injection of external audio the sidetone level at any time.
signals and monitoring of the intercom line by external
equipment e.g. recorders, paging systems, etc.

2.0 UNPACKING

The shipping carton contains the parts listed below
* The PS 260
* User manual
If any are missing, contact your dealer.

ASL has taken great care to ensure this product reaches
you in flawless condition.

After unpacking the unit please inspect for any physical
damage to the unit, and retain the shipping carton and
relevant packing materials for use should the unit need
returning.

If any damage has occurred, please notify your dealer so
that a written claim can be initiated. Please also refer to the
guarantee section of this manual.

3.0 MECHANICAL INSTALLATION

The PS 260 will interface between ASL partyline (3-wire
intercom) and external 4-wire systems.

To connect the PS 260 with ASL partyline system, use
professional flexible microphone cable with 2 wires and 1
shield only.
Connect the partyline system cable into the intercom line
connector on the rear. To connect the PS 260 with the
external 4-wire system, connect the output of this system
with the input of the PS 260 and the input of the system
with the output of the PS 260.

There are no separate power connections to install since
the necessary DC voltages are derived from the ASL
partyline.

The PS 260 is fully protected against mis-wiring (reverse
power) or short circuit in the interconnecting cables.

User Manual PS 260 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.

3

4.0 FRONT PANEL CONTROLS

The PS 260 consists of two separate interface modules in Signals offered to the audio input are placed on the audio
one housing. Each module interfaces between ASL 3-wire wire of the 3-wire intercom line connector.
systems and 4-wire systems. The signal on the audio wire To avoid that signals on the audio input are being placed
of the ASL 3 wire system is converted in a balanced signal on the audio output connector, there is a sidetone
and appears on the audio output connector. available.

1 POWER indicator led 6 SIDETONE TEST knob

This led illuminates if line power is supplied by the This hidden push button switch activates a test tone
power supply or master station of the ASL partyline generator which adds a 200 Hz tone to the input signal.
intercom system in which the PS 260 is used. It allows you to adjust or check the sidetone trimmer

settings at any time. The switch can be reached with a

2 INPUT LEVEL control knob

This knob controls the level of the input signal before it
is placed on the intercom line. Note: Make sure you are not disturbing any

3 OUTPUT LEVEL control knob

This knob controls the level of the intercomline signal channel can hear the test tone.
appearing at the output connector.

4 SIDETONE LEVEL trimmer

This trimmer controls the level of the input signal - Turn up output level approx. half way.
appearing at the output. - Set sidetone trimmers in start position

5 SIDETONE HI trimmer

This trimmer controls the input/output separation in the - Activate the testtone generator.
high frequency range. - Decrease test tone level by turning the level

match or a small screwdriver.

communication because the test-tone is placed on the
intercomline which implies that all stations on that

Sidetone adjustment procedure.

- Connect a monitor amplifier to the audio output.

level : turn fully clockwise.
hi : turn fully anti clockwise.

trimmer anti clock wise and adjust for minimum
level.

- Decrease the remaining high frequencies by turning
the hi trimmer clockwise and adjust for minimum
level.

- Repeat the last two mentioned procedures, until
you are sure you have obtained the best settings
possible.

4

User Manual PS 260 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.