Справочник Пользователя для National Instruments NI 9144
NI 9144 User Guide and Specifications
50
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Where:
Turbo Disable
0
The conversion rate is equal to the
oversample clock rate/128.
Set to 0 for conversion rates > 25 kS/s.
oversample clock rate/128.
Set to 0 for conversion rates > 25 kS/s.
1
The conversion rate is equal to the
oversample clock rate/256.
Set to 1 for conversion rates < 25 kS/s.
oversample clock rate/256.
Set to 1 for conversion rates < 25 kS/s.
Clock Divisor
The clock source (internal or external) is divided by this value and used
as the converters’ oversample clock. Valid values are from 2 to 31, but
the final divided clock must be between 512 kHz and 6.4 MHz. This
means that only values from 2 to 25 are valid when using the 12.8 MHz
internal clock source.
as the converters’ oversample clock. Valid values are from 2 to 31, but
the final divided clock must be between 512 kHz and 6.4 MHz. This
means that only values from 2 to 25 are valid when using the 12.8 MHz
internal clock source.
Clock Source
0b00 = 0
The
OCLK
pin is used as the
oversample clock source.
0b01 = 1
The 12.8 MHz internal clock is
used as the clock source and this
12.8 MHz is driven onto the
used as the clock source and this
12.8 MHz is driven onto the
OCLK
pin.
0b10 = 2
The internal clock is used but not
driven onto
driven onto
OCLK
pin. Currently,
this is the required clock setting.
0b11 = 3
Reserved.
Table 44. NI 9233 Calibration Data
Data Rate
Turbo
Disable
Clock
Divisor
Clock
Source
Configure
ADC
Oversample
Clock Rate
50.000 kS/s
0
00010
10
0x0A
6.40 MHz
25.000 kS/s
1
00010
10
0x8A
6.40 MHz
12.500 kS/s
1
00100
10
0x92
3.20 MHz