1142A Probe Control and Power Module
Service
17
Figure 5
A1 Control and Power Module Block Diagram
Front panel screwdriver adjustment Offset Null zeros the dc output
from the probe when the dc input and offset are zero.
For dc Reject, an output from the low- frequency amplifier in the
probe (LFSIG) is used to develop a voltage used to null the dc
component of the input signal. LFSIG is an input to U6, an
inverting amplifier and low- pass filter. Multiplexer U3 selects one
of three capacitors to set a roll- off frequency of 0.05, 0.5, or 5 Hz.
The output of U6 is selected, again by U3, as the input to the offset
amp. When the output of the offset amp is summed into the low
frequency path, the result is cancellation of the dc component of
the input signal. Front panel screwdriver adjustment DC Reject
Gain adjusts the gain of the dc reject circuit.
Содержание 1142A
Страница 1: ...Agilent Technologies Agilent 1142A Probe Control and Power Module User s Guide...
Страница 27: ...1142A Probe Control and Power Module Replaceable Parts 27 Figure 6 A1 Power and Control Assembly...
Страница 29: ...1142A Probe Control and Power Module Replaceable Parts 29 Figure 7 Schematic 1...
Страница 31: ...1142A Probe Control and Power Module Replaceable Parts 31 Figure 9 Schematic 3...
Страница 33: ...1142A Probe Control and Power Module 33...
Страница 34: ...01142 97003 Manual Part Number 01142 97003 Agilent Technologies Printed in Malaysia August 2014...
