Ext Gating Input

This TTL compatible input can be used to gate the output signal on or off. Logic high voltage turns off the output. For further information on the Ext Gating Input, refer to section 2.0.

Dualtone Examples

The following table lists the parameters for some common Dualtone.

Name

Frequency 1

Frequency 2

On Time (Ton)

Off Time (Toff)

Dial Tone

350 Hz

440 Hz

1 mS

0 mS

Ring back

440 Hz

480 Hz

2,000 mS

4,000 mS

Busy

480 Hz

620 Hz

500 mS

500 mS

Reorder

480 Hz

620 Hz

250 mS

250 mS

DSN Preempt

440 Hz

620 Hz

1 mS

0 mS

European

420 Hz

440 Hz

various

various

Note: The Phase Offset field value may be set to any value to properly generate these tones.

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BK Precision 4071 User Manual Rev.2.2

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B&K 4071 user manual Ext Gating Input, Dualtone Examples