Connecting The Analog Input Signal; Connection Example Of Single-Ended Input - Contec DIG-100M1002-PCI User Manual

100msps 2ch digitizer board for pci

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Connecting the Analog Input Signal

The following figure shows an example of shield cable connection.

Connect BNC connector of CH0/CH1 for each anlog input channel respectively, the wick line to the

signal line and the shield braid to the ground.

CH0/CH1

BOARD

Analog Input 0/1

Analog Ground

Figure 3.4. Connecting the Single-ended Input (shield cable)

CAUTION

Do not touch the external connector (BNC connector) when the power is on.

Otherwise this may malfunction, cause a failure due to static electricity.

When high frequency more than 1/2 of the sampling frequency is included in the signal source, alias

occurs, and the signal might not be acquired normally.

If this product and the signal source receive noise or the distance between this product and the

signal source is too long, data may not be input properly.

The analog signal to be input should not exceed the maximum input voltage (based on this product

analog ground). If it exceeds the maximum voltage, this product may be damaged.

Input data remains indeterminate when no input pin is connected. The analog input pin for the

channel not connected to the signal source must be connected to the analog ground.

Please do not connect terminal resistances such as 50Ω and75Ω instead of short circuit.

When input impedance is 50Ω, the output current (output voltage/50) from the signal source grows.

Please confirm the current value of the connected signal source first.

When the ground is set to input coupling type, please disconnect signal source from BNC connector

first. If you do not so, signal source may fail.

The settings of range setting etc. are unsettled when the PC is started.

Please adjust the input impedance to 50Ω when the signal reflection etc. are anxious.

However, the effect cannot be achieved except for cases such as setting the output impedance of the

signal source to 50Ω, and setting the characteristic impedance of the used connector/cable etc. to

50Ω.

DIG-100M1002-PCI

Shield cable

Signal Source

3. External Connection

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