To Test Offset Accuracy; Procedure; Press Default Setup To Set The Oscilloscope To Default Conditions - Agilent Technologies 54845B Manual

Table of Contents

To test offset accuracy

This test checks the vertical offset accuracy.

Specification: ±(1.00% of channel offset + 1% of full scale) at full-resolution channel scale

Equipment Required

Equipment

Critical Specifications

0.5 V to 2 Vdc, ±1 mV accuracy

Power Supply

Digital Multimeter

Better than 0.1% accuracy

(DVM)

Cables (2)

BNC

Adapters (2)

BNC (f) to banana (m)

Adapters (2)

BNC tee (m)(f)(f)

Blocking capacitor

0.18

Shorting cap

BNC

Procedure

Connect the equipment.

The cabling is the same as that used for the voltage measurement accuracy test. See figure 3-4.

a Use a BNC-to-banana adapter to connect a BNC cable to the power supply.

b Connect a BNC tee to the other end of the cable and connect the tee to channel 1 of the

oscilloscope.

c Connect another BNC cable to the tee at the oscilloscope and connect a BNC tee to the

other end of the cable.

d Connect the blocking capacitor to the BNC tee and connect the BNC short to the blocking

capacitor.

e Connect a BNC-to-banana adapter to the same BNC tee and connect the adapter to the

DVM input.

Press Default Setup to set the oscilloscope to default conditions.

Select Acquisition from the Setup menu.

Select Equivalent Time under Sampling Mode. Enable Averaging, and set the # Points

for averaging to 32. Click Close.

Setup is the same as that for the voltage measurement accuracy test. See figure 3-5.

Use the following table for steps 6 through 12.

Volts/div

Position

200 mV

2.00000 V

100 mV

1.00000 V

50 mV

500.000 mV

Select Channel 1 from the Setup menu.

Set the vertical Scale to the Volts/div value from the first row of the table. Set the Offset

to the Position value from the first row of the table. Click Close.

Supply

Tolerance

±36 mV

2.00 V

±18 mV

1.00 V

±9 mV

500 mV

Chapter 3: Testing Performance