Newport ESP6000 User Manual page 260

Auxiliary Ch. 7 Input B(+)
The B(+) input is pulled-up to +5 volts with a 1KΩ resistor. The signal is
buffered with a 26LS32 differential receiver. The B(+) quadrature encoded
signal originates from external feedback circuitry and is used for position
tracking.
Auxiliary Ch. 7 Input B(–)
The B(–) input is pulled-up to +5 volts and pulled down to ground with
1KΩ resistors. This facilitates both single- and double-ended signal
handling into a 26LS32 differential receiver. The B(–) quadrature encoded
signal originates from external feedback circuitry and is used for position
tracking.
Auxiliary Ch. 8 Input A(+)
The A(+) input is pulled-up to +5 volts with a 1KΩ resistor. The signal is
buffered with a 26LS32 differential receiver. The A(+) quadrature encoded
signal originates from external feedback circuitry and is used for position
tracking.
Auxiliary Ch. 8 Input A(–)
The A(–) input is pulled-up to +5 volts and pulled down to ground with
1KΩ resistors. This facilitates both single- and double-ended signal
handling into a 26LS32 differential receiver. The A(–) quadrature encoded
signal originates from external feedback circuitry and is used for position
tracking.
Auxiliary Ch. 8 Input B(+)
The B(+) input is pulled-up to +5 volts with a 1KΩ resistor. The signal is
buffered with a 26LS32 differential receiver. The B(+) quadrature encoded
signal originates from external feedback circuitry and is used for position
tracking.
Auxiliary Ch. 8 Input B(–)
The B(–) input is pulled-up to +5 volts and pulled down to ground with
1KΩ resistors. This facilitates both single- and double-ended signal
handling into a 26LS32 differential receiver. The B(–) quadrature encoded
signal originates from external feedback circuitry and is used for position
tracking.
Digital Ground
Ground reference used for all digital signals.
Digital I/O
The digital I/O can be programmed to be either input or output (in 8-bit
blocks) via software and is pulled-up to +5 volts with a 1KΩ resistor. In
the auxiliary connector only 4-bits of digital I/O from each 8-bit block are
made available so that users can program 4-bits as output and 4-bits of
input. Bits 0-3 are controlled by Port A API calls and bits 8-11 by Port B
API calls. Note that these digital I/O signals are internally hard-wired to
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