Agilent Technologies N1022A Guide de l'utilisateur Page 46

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46 N2820/1A User’s Guide
2 Probing
To Change an N2825A Head’s ID Resistor
Figure 26 Location of ID Resistor (R2)
5 Replace the ID resistor with one of the values listed in
Table 5. The default value loaded on the board is 16.2 kW.
You can purchase a resistor from a supplier such as
Digi- Key corporation.
CAUTION If you are not skilled in soldering, ask a trained assembler to change the
resistor.
6 Replace the N2825A’s cover using the four screws. (M1.6 x
0.35, 5 mm long, Agilent part number 0515- 5210)
CAUTION To avoid damaging the aluminum casting, do not over tighten the screws.
7 Connect the N2825A to an N2820/1A probe and connect the
probe to the oscilloscope.
Table 5 Valid N2825A ID Resistors
Resistor
Value
Description
16.2 kΩ Default value. Resistor, ±1%, 0.063W, TC±100 thick film 0402 SMT
19.6 kΩ Resistor, ±1%, 0.063W, TC±100 thick film 0402 SMT
26.1 kΩ Resistor, ±1%, 0.063W, TC±100 thick film 0402 SMT
42.4 kΩ Resistor, ±1%, 0.063W, TC±100 thick film 0402 SMT
61.9 kΩ Resistor, ±1%, 0.063W, TC±100 thick film 0402 SMT
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