ESI VideoBridge 2150, Руководство по обслуживанию

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A.2.9
RS-232C
Interface (Option al on 2150/Standard on 2160)
In 1963, the Elec tronic Industry Association ( E IA) es tablished a
s tandard to govern the In terface Be tween Data Terminal Equipment and
Data Communication Equipmen t Employing Serial Binary In terchange. The
la tes t revision of this s tandard has been in effect since 1969 and is
known as RS-232C. The R S-232C s tandard defines electrical, logical,
and mechanical specifica tions for the transmission of bi t serial
information. The VideoBridge ' s R S-232C op tion suppor ts one
bidirec tional comm unica tion channel ( channel B) t ha t is u sed to
communica te instrument set up and measuremen t information.
N O TE:
E S I s u ppor t s the u se of R S-232C Channel B only.
Channel A is strict ly an inpu t channel and is reserved for
a pplications programming fea tures. Since Channel B is the
secondary RS-232C channel, some VideoBridge pin con­
nec t i ons do no t conform t o s t andard config ura tions. To
ensure proper da ta transfer
I
consu 1 t the RS-232C s tanda rd
and/or the manual of the device being connected.
A.2.9.1 Channel B
Channel B is used in two ways:
1. As a serial ou tpu t for driving a prin ter.
2. As a means to provide remo te programming. Programming
ins trumen t se t ups is very simi la r to tha t used on the
IEEE-488 In terface Bus.
Data flowing into Channel B are pu t in an in termediate queue on an
in terrup t basis. Up to two hundred charac ters of inpu t are allowed
before overflow occurs. Full lines of data can be transmit ted withou t
concern abou t lost data.
NOTE:
Entries made through channel B are not echoed back
for display.
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