Tektronix ADA400A Instruction Manual page 11

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Getting Started
Getting Started includes a description of the product features and a list of
standard and optional accessories. This section also describes how to supply
power to the preamplifier and how to connect the preamplifier to an oscilloscope.
Product Description
The ADA4O0A Differential Preamplifier allows direct oscilloscope measure-
ments of very low amplitude voltages and signals that do not have a ground
reference. These measurements are typical in setups that depend on transducers
or other sensitive devices to supply the electrical signal.
Highlights of the ADA400A Differential Preamplifier are as follows:
Selectable gains of X100, X10, X1, and X0.1 provide wide range of
sensitivity.
= Common-mode rejection of greater than or equal to 100,000 to 1 in the
frequency range of DC to 10 kHz removes unwanted common mode
electrical noise from sensitive pickups.
8 Bandwidth of greater than or equal to 1 MHz amplifies signals with fast
transients. Selectable bandwidth limits of 100 Hz, 3 kHz, 100 kHz reject
normal-mode noise.
= Input impedance of | M® in all settings and selectable impedance of
infinite Q (> 10!2 Q) in X100 and X10 gain settings. The high input
impedance prevents loading down signals with high source impedance.
= Adjustable differential offset allows the user to null out transducer bridge
bias, galvanic potentials from the test setup, or other DC voltages.
m Special circuitry greatly reduces the annoying DC drift commonly found in
older types of differential preamplifiers.
m TEKPROBETM Interface provides power input and signal output connections.
Accessories
Standard accessories for the ADA400A Differential Preamplifier include the
® This instruction manual
= Two spare input fuses
ADA4OOA Instruction Manual 1