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參數資料
| 型號： | PCADADIO-CS |
| 英文描述： | PC(ISA)BUS I/O CARD |
| 中文描述： | 電腦（ISA）總線的I / O卡 |
| 文件頁數： | 14/26頁 |
| 文件大?。?/td> | 393K |
| 代理商： | PCADADIO-CS |
Page 14
2192-09061-000-000
J489 PCADADIO
Calibration
Calibrating the ADC
In order to calibrate the ADC it is necessary to have a precision digital voltmeter (DVM) with at
least 5 digit resolution and a high stability low noise DC signal source. To monitor adjustments, it
is necessary to continually read and display the ADC data. There is a program on the Utility Disk
which provides this facility, PCADADIO.EXE.
Two trim adjusters, VR7 and VR1, are provided for trimming the zero offset and gain
respectively. These trims are for fine-adjusting the standard ranges.
Unipolar Calibration
Set the necessary links for unipolar mode and the required voltage range. Run the screen
display software.
Zero Offset Adjust
1)
Set the input voltage to exactly zero.
2)
Adjust VR7 to give 000 to 001 hex.
Full Scale Gain Adjust
1)
Set the input voltage to full scale positive minus 1 LSB:-
+4.9985 for the 5V range.
+9.9975 for the 10V range.
2)
Adjust VR1 to give FFE to FFF.
Bipolar Calibration
Set the necessary links for bipolar mode and the required voltage range. Run the screen display
software.
Bipolar Offset Adjust
1)
Set the input voltage to full scale negative plus 1 LSB:-
-4.9975 for the 5V range.
-9.995 for the 10V range.
2)
Adjust VR7 to give 000 to 001 hex.
Full Scale Gain Adjust
1)
Set the input voltage to full scale positive minus 1 LSB:-
+4.9975 for the 5V range.
+9.995 for the 10V range.
2)
Adjust VR1 to give FFE to FFF.
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| PCAF-1 | 制造商:Aeroflex / KDI 功能描述:ATTENUATOR - PCB MOUNT |
| PCAF-10 | 制造商:Aeroflex / KDI 功能描述:ATTENUATOR - PCB MOUNT |
| PCAF-2 | 制造商:Aeroflex / KDI 功能描述:ATTENUATOR - PCB MOUNT |
| PCAF-20 | 制造商:Aeroflex / KDI 功能描述:ATTENUATOR - PCB MOUNT 制造商:Aeroflex 功能描述: |
| PCAF-3 | 制造商:Aeroflex / KDI 功能描述:ATTENUATOR - PCB MOUNT |
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