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DBK45 4-Channel SSH and Low-Pass Filter Card

Overview …… 1

Hardware Setup …… 2

Card Connection …… 2

Card Configuration …… 2

Configuring DBK45 Filter Sections …… 3

DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration …… 5

DaqBook/2000 Series and DaqBoard/2000 Series Configuration …… 5

Software Setup …… 5

DBK45 – Specifications …… 6

Reference Notes:

o Chapter 2 includes pinouts for P1, P2, P3, and P4. Refer to pinouts applicable to your

system, as needed.

o In regard to calculating system power requirements, refer to DBK Basics located near

the front of this manual.

Overview

The DBK45 combines the features of the DBK17 (SSH) and the DBK18 (low-pass filter) cards. Each

DBK45 provides 4 input channels to a LogBook or Daq device system. Each of the main 16 analog input

channels can accept four DBK45s, for a maximum of 64 DBK45s and 256 analog input channels. The

simultaneous sample-hold function is activated at the beginning of each channel scan and freezes all

signals present on DBK45 inputs for the duration of the scan, allowing for non-skewed readings of all

channels.

You should never set a DBK45 channel as the 1st channel in a scan due to timing of

the SSH line.

For each of the four channels, a separate filter and a sample-hold stage follow the input stage. The outputs

are connected to a 4-channel multiplexer stage. The enabled-output MUX allows four DBK45s to share a

common analog input channel.

The DBK45 has an instrumentation amplifier for each channel, with switch-selected gains of ×1, ×10,

×100, ×200 and ×500. A socket is provided for a gain resistor for custom gain-selection instead of the 5

factory-default gains. Gain for any channel can be set to any value between unity and ×500 by installing

an appropriate resistor. Four separate filter stages follow the 4 input stages. The outputs are connected to

4-channel multiplexer stage. The enabled output MUX allows four DBK45s to share a common analog

base channel.

Input can be connected to a channel’s BNC or terminal block connector. The differential inputs are

provided with switchable 100 kΩ bias resistors to analog common.

DBK Option Cards and Modules 987696 DBK45, pg. 1

1 2 3 4 5 6

Sommario

Pagina 1 - Overview

DBK45 4-Channel SSH and Low-Pass Filter Card Overview …… 1 Hardware Setup …… 2 Card Connection …… 2 Card Configuration …… 2 Configuring DBK45 Fil

Pagina 2 - Hardware Setup

DBK45 Block Diagram Hardware Setup Card Connection CAUTION Input voltage levels must not exceed ±5 V bipolar or 10 V unipolar. DBK45 is equipped

Pagina 3 - 987696 DBK45, pg. 3

Address Configuration Up to four DBK45s can be connected to each analog channel. With 16 main channels and 4 inputs per DBK45, 256 inputs are possib

Pagina 4

The right-hand figure shows the DIP-16 component pattern typical of the 4 filter sections. Note: “n” corresponds to “channel number.” Pin 7 of the

Pagina 5 - Software Setup

DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration Use of the DBK45 requires setting jumpers in DaqBooks/100 Series & /2

Pagina 6 - DBK45 – Specifications

DBK45, pg. 6 987696 DBK Option Cards and Modules DBK45 – Specifications Name/Function: Simultaneous Sample and Hold and Low-Pass Filter Card Num

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