ASL INTERCOM PS 260, Руководство пользователя

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User Manual PS 260 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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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
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
settings at any time. The switch can be reached with a
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.