Specifications

Section 7. Measurement Instructions
7-40
Parameter
& Data Type
Enter
Dest
Variable or
Array
The array where the results of the instruction are stored. For all output
options except Capture All Events, the Dest argument should be a one
dimensional array with as many elements as there are programmed INT8
channels. If the "Capture All Events" OutputOption is selected, then the
Dest array must be two dimensional. The magnitude of first dimension
should be set to the number of functions (up to 8), and the magnitude of the
second dimension should be set to at least the number of events to be
captured. The values will be loaded into the array in the sequence of all of
the time ordered events captured from the lowest programmed channel to the
time ordered events of the highest programmed channel.
Address
Constant
The address is entered as a base 10 number. Valid addresses are 0 to 15.
The INT8 is addressable using internal jumpers. The jumpers are set at the
factory for address 00. See Appendix A of the INT8 manual for details on
changing the INT8 address.
Config8_5
Config4_1
Constants
Each of the 8 input channels can be configured for either high or low level
voltage inputs, and for rising or falling edges.
Config8_5 is a four digit code
to configure the INT8's channels 5 through 8.
Config4_1 is a four digit code
to configure the INT8's channels 1 through 4. The digits represent the
channels in descending order left to right. For example, the code entered for
Config8_5 to program channels 8 and 6 to capture the rising edge of a high
level voltage, and channels 5 and 7 to capture the falling edge of a low level
voltage would be "0303". See section 2 of the INT8 manual for information
about the specification requirements of high and low level voltage signals.
Digit Edge
0 High level, rising edge
1 High level, falling edge
2 Low level, rising edge
3 Low level falling edge
Funct8_5
Funct4_1
Constants
Each of the 8 input channels can be independently programmed for one of
eight different timing functions.
Funct8_5 is a four digit code to program
the timing functions of INT8 channels 5 through 8.
Funct4_1 is a four digit
code to program the timing functions of INT8 channels 1 through 4. See
section 5.3 of the INT8 manual for further details about these functions.
Digit Results
0 None
1 Period (msec) between edges on this channel
2 Frequency (kHz) of edges on the channel
3 Time between an edge on the previous channel and the edge on
this channel (msec)
4 time between an edge on channel 1 and the edge on this channel
(msec)
5 Number of edges on channel 2 between the last edge on channel
1 and the edge on this channel using linear interpolation
6 Low resolution frequency (kHz) of edges on this channel
7 Total number of edges on this channel since last interrogation
8
Integer number of edges on channel 2 between the last edge on
channel 1 and the edge on this channel.