Agilent Technologies E1441A AM Modulation Depth Verification, Square Wave Duty Cycle Verification

AM Modulation Depth Verification

This test verifies the modulation depth specification.

Select each function generator output in the table below. Use a DMM to measure the function generator ACrms output voltage. Compare the measured results to the test limits shown in the table. This is a HIGH Z output termination test.

Table D-8. AM Modulation Verification

			Agilent E1441A					Measurement
					AM Modulation				+
	Function	Out	Ampl	Freq	Shape	Freq	Depth	Nominal	Error
		Terma
Q	Sine wave	HIGH Z	1.0 Vrms	1.00 kHz	Sinewave	100 Hz	0%	0.50 Vrms	± 0.005 Vrms
	Sine wave	HIGH Z	1.0 Vrms	1.00 kHz	Sinewave	100 Hz	100%	0.61 Vrms	± 0.0061 Vrms

a.The E1441A has a fixed output impedance of 50 Ω on the "Output" terminal. Use the OUTPut:LOAD 50 INFinity MIN MAX command to set the output termination. HIGH Z assumes no load on output. 50 Ω assumes a 50 Ω ± 0.1 Ω load on output.

Optional Performance Verification Tests

Square Wave Duty Cycle Verification

These tests are not intended to be performed with every calibration. They are provided as an aid for verifying additional instrument specifications.

This test verifies the duty cycle specification of the squarewave output.

Select each function generator output in the table below. Use an integrating DMM to measure the VDC output of the function generator. Compare the measured results to the test limits shown in the table. This is a HIGH Z output termination test.

NOTE: You make a DC voltage measurement on this test.

Table D-9. Square Wave Duty Cycle Verification

	Function	Out	Ampl	Freq	Duty	Nominal	Error
		Terma			Cycle
O	Square wave	HIGH Z	1.0 Vrms	300.00 Hz	50%	0.00 VDC	± 0.020 VDC
O	Square wave	HIGH Z	1.0 Vrms	300.00 Hz	25%	- 0.50 VDC	± 0.020 VDC
O	Square wave	HIGH Z	1.0 Vrms	300.00 Hz	75%	+ 0.50 VDC	± 0.020 VDC

a.The E1441A has a fixed output impedance of 50 Ω on the "Output" terminal. Use the OUTPut:LOAD 50 INFinity MIN MAX command to set the output termination. HIGH Z assumes no load on output. 50 Ω assumes a 50 Ω ± 0.1 Ω load on output.

Note

The DMM used for this test must be an integrating multimeter. If the first step does not measure 0 VDC, use an oscilloscope for this test.

Do not use an auto-ranging function on the DMM for this test. Fix the DMM measurement range at 10 VDC.

172 Service Procedures Appendix D