User manual

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.