Measurement Computing Micro 488/EX rev.2.1 - Manual (Page 179)

Section 7 Peripheral Pass-Thru Operation
7.7
The Micro488/EX 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 Micro488/EX's serial and bus terminators you
should refer to Section 2 of this manual.
7.6 IEEE 488 Bus Implementation
As a pass-thru bus peripheral, the Micro488/EX implements many of the
capabilities defined by the IEEE 488 1978 specification. These are discussed in the
following sub-sections. The bus uniline and multiline commands that the Micro488/EX
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)
7.6.1 My Talk Address (MTA)
When the Micro488/EX 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
Micro488/EX will continue to output serial input buffer data as long as the
IEEE controller allows.
7.6.2 My Listen Address (MLA)
When the Micro488/EX is addressed to listen, it accepts data from the
active talker and outputs this data through the serial interface. It substitutes
the selected serial terminators for the received IEEE bus terminators.