Agilent Technologies 45A, 46A To test offset accuracy, Connect the equipment, Equipment Required

Chapter 3: Testing Performance

To test offset accuracy

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	Recommended Model/Part
Power Supply	0.5 V to 2 Vdc, ±1 mV accuracy	Agilent 6114A
Digital Multimeter	Better than 0.1% accuracy	Agilent 34401A
(DVM)
Cables (2)	BNC	Agilent 10503A
Adapters (2)	BNC (f) to banana (m)	Agilent 1251-2277
Adapters (2)	BNC tee (m)(f)(f)	Agilent 1250-0781
Blocking capacitor	0.18 ∝F	Agilent 10240B
Shorting cap	BNC	Agilent 1250-0774

Procedure

1Connect 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.

2Press Default Setup to set the oscilloscope to default conditions.

3 Select Acquisition from the Setup menu.

4Select 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.

5Use the following table for steps 6 through 12.

Volts/div	Position	Supply	Tolerance		Limits
				minimum	maximum
200 mV	2.00000 V	2.00 V	±36 mV	1.964 V	2.036 V
100 mV	1.00000 V	1.00 V	±18 mV	0.982 V	1.018 V
50 mV	500.000 mV	500 mV	±9 mV	491 mV	509 mV

6Select Channel 1 from the Setup menu.

7Set 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.

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