Measurement Computing Analyzer488 - Manual (Page 210)

Section 5 Analyst488 Software
5.22
5.11.4 Slow
This command configures the Analyzer488 handshake circuitry to
perform a handshake at a slow rate of 1 to 10 events per second. When
this command is issued, a menu will appear showing the valid speed
selections.
5.11.5 Step
This command configures the handshake circuitry to perform one
handshake each time the Step command is issued. When the command is
first issued, the handshake speed is set to Step and 1 handshake is
performed. In this way, each bus events may be easily viewed. If you are
using handshake Step speed, the Step command must be used to complete
each bus event whether talking or listening on the bus.
This command may also be selected without pulling down the
Handshake menu by pressing <F10>. Each step is also performed by
pressing <F10>.
5.11.6 None
This command disables the handshake circuitry and allows the
Analyzer488 to record bus data without appearing to be an active listener.
The Analyzer488 does not participate in bus handshaking and has no
control of the bus event speed. This selection is useful for recording events
such as bus errors and measuring the speed of other devices on the bus. It
also shows such errors as no active listeners.