Agilent Technologies AGILENT U2761A Service Manual download pdf (Page 33)

Calibration 3

U2761A Service Guide 19

2 Set the U2761A to the output shown in the table below

and measure the output frequency. Make sure that the

U2761A output is enabled.

1 Based upon ±8 ppm for one year.

3 Compare the measured frequency with the test limit

shown in Table 3- 2.

Output Impedance Verification

The U2761A stores the calibration constant for the output

impedance. The output impedance measurement is necessary

to calculate the correct output amplitude when the load

impedance is not at High- Z termination. The output

impedance is measured at three different output paths.

1 Set the DMM to measure offset-compensated, four-wire

ohms. Set the DMM to use 100 NPLC integration. Connect

the DMM to the U2761A as shown in the figure below.

Figure 3-2 U2761A to DMM four-wire connection

Table 3 - 2 Configuration for timebase verification

U2761A Measurement

Function Amplitude Frequency Nominal Error

Sine 1.00 Vpp 10.0000 MHz 10.0000 MHz ±80 Hz

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 66 67

No comments

Agilent Technologies AGILENT U2761A Service Manual Page 33