Agilent Technologies N1022A Uživatelská příručka stáhnout pdf (Strana 46)

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

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 81 82

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Agilent Technologies N1022A Uživatelská příručka Strana 46