Chapter 4
Software Reference
© National Instruments Corp.
4-31
GPIB-410 User Manual
the software to update the indicators as often as possible, but not at the
expense of other more important activities.
MAXIMUM
is usually satisfactory, but can sometimes result in indicator
"freeze up" during processor-intensive activities. For the DOS icon
indicators,
MAXIMUM
and
18
Hz
are equivalent.
Acceptor Handshake Rate
Use this field to specify the speed of the GPIB-410 acceptor handshake
functions. The value selected applies to both the <Alt-A> ACP
handshaker and the optional handshake used during the capture of data
and command transfers. There are 25 options.
60 Hz
400 Hz
4 KHz
40 KHz
400 KHz
80 Hz
500 Hz
5 KHz
50 KHz
500 KHz
100 Hz
1 KHz
10 KHz
100 KHz
700 KHz
200 Hz
2 KHz
20 KHz
200 KHz
900 KHz
300 Hz
3 KHz
30 KHz
300 KHz
MAXIMUM
Selecting one of the numeric options programs the GPIB-410 hardware
to regulate the acceptor handshake to an approximation of the requested
speed. Selecting
MAXIMUM
disables the hardware timers and allows the
handshake to proceed at the fastest rate possible.
Note:
Because of other configuration variables such as host processor
speed and DMA vs. PIO capture operation, the actual acceptor
handshake rate observed may be less than requested.
Source Handshake Rate
Use this field to specify the speed of the GPIB-410 source handshake
functions. The value selected applies to both the <Alt-S> SRC
handshaker and the handshake used during pattern generation sequences.
There are 25 options.
60 Hz
400 Hz
4 KHz
40 KHz
400 KHz
80 Hz
500 Hz
5 KHz
50 KHz
500 KHz
100 Hz
1 KHz
10 KHz
100 KHz
700 KHz
200 Hz
2 KHz
20 KHz
200 KHz
900 KHz
300 Hz
3 KHz
30 KHz
300 KHz
MAXIMUM