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參數(shù)資料
| 型號： | APCI-IB40 |
| 英文描述： | PCI-BUS I/O CARD |
| 中文描述： | PCI總線的I / O卡 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大小： | 251K |
| 代理商： | APCI-IB40 |
Page 9
2192-09125-000-000
J605 APCI-ADADIO
Full scale Gain Adjust
1) Set the input voltage to full scale positive minus 1 LSB
+4.9975 for the 5V range.
+9.9950 for the 10V range.
2) Adjust VR1 to give FFE to FFF.
Calibrating the DACs
In order to calibrate the DACs it is necessary to have a DVM with at least 5 digit resolution. On the
utility disk there is a
A single trimmer (VR2) is provided to adjust the reference voltage used by the DACs
Set the necessary links for the required mode and voltage ranges. Run the ADADIO.EXE program .
Measure the voltage between VREF (TP3) and AGND (TP9)and adjust VR2 until the reading is +5.02V.
Note:
- If the gain adjust trimmers (VR3-4) have insufficient range , adjust VR2 to read 5.01V, and
repeat the calibration procedure.
Unipolar Calibration - DAC Channel A
Zero Offset Adjust
1) Set DAC A output to 000 hex.
2) Measure the voltage between DAC A output and analogue ground and adjust VR5 to give 0.000V.
Full Scale Gain Adjust
1) Set DAC A output to 800 hex,
2) Measure the voltage between DAC A output and analogue ground and adjust VR3 to exactly half
scale output.
2.500V for the 0-5V range.
5.000V for the 0-10V range.
3) Set DAC A output to FFF hex and check output voltage is:-
4.9985 for the 0-5V range.
9.9975 for the 0-10V range.
4) Adjust VR3 if necessary.
Repeat for DAC B replacing VR5 with VR6, and VR3 with VR4.
Bipolar Calibration - DAC Channel A
Zero Offset Adjust
1) Set DAC A output to 000 hex.
2) Measure the voltage between DAC A output and analogue ground and adjust VR5 to give full scale
negative i.e -5.000V.
Full Scale Gain Adjust
1) Set the DAC A output to 800 hex.
2) Measure the voltage between DAC A output and analogue ground and adjust VR3 to give half
scale output i.e 0.000V.
3) Set DAC A to FFF hex and check full scale is 4.9975V.
Repeat for DAC channel B replacing VR5 with VR6, and VR3 with VR4.
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