Agilent Technologies N1022A Guía de usuario Pagina 49

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Probing 2
To Add an R
SENSE
Resistor to an N2825A Head
N2820/1A User’s Guide 49
To Add an R
SENSE
Resistor to an N2825A Head
You can add your own R
SENSE
resistor to N2825A heads. Use
a resistor of type ±1%, 0.5W, TC ±600, thick film 2010 SMT.
The value of the precision resistor can range from 1 mW to
1MW in 1 mW increments. When selecting the resistance
value, you must observe the 500 mW maximum power rating
of the head.
1 Detach the head from the probe amplifier as explained in
“Attaching a Probe Head” on page 34.
2 Remove the four hex screws that secure the head’s cover
and remove the cover.
Figure 27 Removing the Cover
3 Change or add the R
SENSE
resistor (R1) as shown in
Figure 28.
CAUTION If you are not skilled in soldering, ask a trained assembler to change the
resistor.
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