Agilent Technologies AGILENT U2761A Instrukcja Obsługi Pobierz pdf (Strona 34)

3 Calibration

20 U2761A Service Guide

2 Use the DMM to make the resistance measurement at the

output terminal for each setup shown in the table below.

The expected measured value is approximately 50 Ω..

3 This procedure will require you to unsecure the

instrument for calibration. See “Calibration Procedure” on

page 30 for more information on how to unsecure the

instrument for calibration. The calibration constant is not

stored to the U2761A after completing the setup.

4 Exit the Calibration Mode.

DC Offset (High Impedance) Verification

This procedure verifies the accuracy of the DC offset with

high impedance load (DMM input impedance of 10 M

Ω).

1 Set the DMM to measure DC voltage. Connect the DMM to

the U2761A as shown in the following figure. The DMM

input impedance must be set to 10 M

Ω.

Figure 3-3 U2761A to DMM connection

Table 3 - 3 Output impedance verification configuration

U2761A DMM

CalSet Output path Lower margin Measurement Upper margin

–20 dB 49.5 ΩΩ50.5 Ω

60 dB 49.5 ΩΩ50.5 Ω

7 +20 dB 49.5 ΩΩ50.5 Ω

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 66 67

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Agilent Technologies AGILENT U2761A Instrukcja Obsługi Strona 34