Heathkit mMATIC SA-5010A User Manual

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ies are only switched in when the keyer is disconnected from its source of power; thus, you can
extend the battery life by leaving the keyer plugged into an AC outlet when it is not in use.
STATUS LEDs
Whenever the status of the keyer is changed, the data in an internal status register is atache into
IC U7 and causes the appropriate LED(s) to light. One of the status bits go low when a digit key is
pressed. This bit turns off transistor Q101 when the keyer is in the Normal mode and dims the
NORM LED as a reminder that the keyer is expecting a function key to be pressed.

Heathkit mMATIC SA-5010A Specifications

General

Brand	Heathkit
Model	mMATIC SA-5010A
Category	Measuring Instruments
Language	English