Buffering; Triggered Scan Mode - Measurement Computing Data Translation DT3034 User Manual

Chapter 7

Buffering

Buffer Support
SupportsBuffering
Single Buffer Wrap Mode Support
SupportsWrapSingle
Inprocess Buffer Flush Support
SupportsInProcessFlush
a. The data from the DT3034 board is transferred to the host in 64 byte segments; therefore, the
number of valid samples that can be moved is always a multiple of 64. If the application
moves data from the buffer before the module has transferred 64 samples to the host, the
resulting buffer will contain 0 samples. Your application program must deal with these
situations when flushing an inprocess buffer.

Triggered Scan Mode

Triggered Scan Support
SupportsTriggeredScan
Maximum Number of CGL Scans per Trigger
MaxMultiScanCount
Maximum Retrigger Frequency
MaxRetriggerFreq
Minimum Retrigger Frequency
MinRetriggerFreq
a. The channel list depth of 1024 entries in conjunction with a multiscan count of 256 provides an
effective channel list depth of up to 256K entries.
b. The maximum retrigger frequency is based on the number of samples per trigger as follows:
Min. Retrigger = # of CGL entries x # of CGLs per trigger + 2 s
Period
Max. Retrigger =
Frequency
c. The value of 1.2 Hz assumes the minimum number of samples is 1.
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Table 10: DT3034 Buffering Options
DT3034 A/D
Yes
a
Yes
Table 11: DT3034 Triggered Scan Mode Options
DT3034
Yes
256
250 kHz
1.2 Hz
A/D sample clock frequency
1
Min. Retrigger Period
D/A DIN DOUT
Yes
Yes
A/D D/A DIN DOUT
a
0 0 0
b
0 0 0
c
0 0 0
C/T QUAD
C/T QUAD
0 0
0 0
0 0