Agilent Technologies 1680, 1690 manual Power Supply, Logic Acquisition Board Block Diagram, 162

Chapter 8: Theory of Operation

Agilent 1680A,AD-series Logic Analyzer Theory

Power Supply

A low voltage power supply provides all the DC voltages needed to operate the logic analyzer. The power supply also provides the +5V VDC voltage to the probe cables to power the logic analyzer accessories and analysis probes.

Unfiltered voltages of +12V, -12V, +5V, -5.2V, +3.4 V and +5V (standby) are supplied to the power distribution board where they are filtered and distributed to other boards and components in the system.

Acquisition Board

Logic Acquisition Board Block Diagram

Probing. The probing system consists of a tip network, a probe cable, and terminations that reside on the analyzer board. Each probe cable is made up of two ribbonized coaxial cables carrying 16 data channels and 1 clock/data channel.

Each channel of the probing system had its own ground. In addition, the pod has a single ground. For applications where many channels are used (greater than three) and signal times are less than 3 ns, individual channel grounds should be used.

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