Measurement Computing Data Translation DT3034, Руководство пользователя

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Chapter 7
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Buffering
Triggered Scan Mode
Table 10: DT3034 Buffering Options
DT3034 A/D D/A DIN DOUT C/T QUAD
Buffer Support
SupportsBuffering Yes Yes
Single Buffer Wrap Mode Support
SupportsWrapSingle Yes
Inprocess Buffer Flush Support
SupportsInProcessFlush Yes
a
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.
Table 11: DT3034 Triggered Scan Mode Options
DT3034 A/D D/A DIN DOUT C/T QUAD
Triggered Scan Support
SupportsTriggeredScan Yes
Maximum Number of CGL Scans per Trigger
MaxMultiScanCount 256
a
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.
0 0 0 0 0
Maximum Retrigger Frequency
MaxRetriggerFreq 250 kHz
b
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 t 2

s
Period A/D sample clock frequency
Max. Retrigger = 1
Frequency
Min. Retrigger Period
0 0 0 0 0
Minimum Retrigger Frequency
MinRetriggerFreq 1.2 Hz
c
c. The value of 1.2 Hz assumes the minimum number of samples is 1.
0 0 0 0 0