Black Box IEEE 1284 Uživatelská příručka stáhnout pdf (Strana 21)

The Black Box Toolkit Page 21 of 98

6. GENERATION INTERFACES

6.1. BBTK Digital tone generators

The toolkit allows for use of two tone generator modules [optional extra] with the two

powered-out lines. These can be used to trigger voice keys on a remote PC as if a human

had made a vocal response. Each tone generator is connected via 3.5mm jacks to lines 5

and 6. Each tone generator has two potentiometers, one for pitch and another for

amplitude.

BBTK Digital Tone

Generator Frequency

Adjustment

mplitude Adjustmen

Red LEDs on the toolkit indicate that a signal is being sent to the tone generator.

Note: The BBTK Tone Generators are not the same as ordinary analogue

speakers. They are custom built and include specialised circuitry and make use of

digital signals together with piezoelectric sounders which have known timing

characteristics. Although you may be able to physically plug a speaker, e.g.

Walkman headphones into the 3.5mm jack of the toolkit it will not function correctly

and may damage both your speakers and the toolkit. Any damage caused as a

result will void your warranty.

It is also possible for you to make use of these powered-out lines for other purposes

specific to your application, e.g. robotic servo control. However extended use is beyond

the scope of this manual.

Note: If you decide to make use of the powered-out feature, you do so entirely at

your own risk. It is assumed that your local technical staff will be on-hand to advise

as needed. We cannot be held responsible for any damage caused to your own

equipment through incorrect wiring. In addition any damage caused to the toolkit as

a result will void your warranty.

6.2. Active switch closure of remote response devices

The toolkit offers two active switch closure lines. These enable you simulate key or button

down events on your own response devices as if they had been made by a human

participant. Two switch closure leads are shipped as standard. For example, you could

tack one wire on to the left button of your mouse and the other to the right. You are then

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Black Box IEEE 1284 Uživatelská příručka Strana 21