Measurement Computing Serial488A - Manual (Page 56)

4.7
In the previous example, the serial terminator should be selected for CR Only
with the IEEE terminator set to CR-LF. When a serial CR character is received it is
discarded and substituted with an IEEE CR followed by an IEEE LF. In the IEEE to
serial direction, the IEEE CR is unconditionally discarded. Upon receipt of the IEEE
LF, a serial CR is substituted.
The Serial488A can be made totally data transparent by setting both the serial
and IEEE terminators to be CR Only or LF Only. The choice of appropriate
terminators may be determined by inspection of the serial device and IEEE controller's
instruction manuals. For selection of the Serial488A's serial and bus terminators you
should refer to Section 2 of this manual.
4.6 IEEE 488 Bus Implementation
The Serial488A implements many of the capabilities defined by the IEEE 488
1978 specification. These are discussed in the following sections. The bus uniline and
multiline commands that the Serial488A does not support or respond to include:
Remote Enable (REN)
Go to Local (GTL)
Group Execute Trigger (GET)
Local Lockout (LLO)
Take Control (TCT)
Parallel Poll (PP)
Parallel Poll Configure (PPC)
Parallel Poll Unconfigure (PPU)
Parallel Poll Disable (PPD)
4.6.1 My Talk Address (MTA)
When the Serial488A is addressed to talk, it retrieves data from the
serial input buffer and outputs it to the IEEE 488 bus. It substitutes the
selected IEEE bus terminators for the received serial terminators. The
Serial488A will continue to output serial input buffer data as long as the
IEEE controller allows.
4.6.2 My Listen Address (MLA)