Agilent Technologies N3280A manual Performance & Verification Tests, Measurement Techniques

B - Performance and Calibration Procedures

Table B-1. Equipment Required (continued)

Oscilloscope	Sensitivity: 1 mV/div.	Agilent Infinium or
	Bandwidth Limit: 20 to 30 MHz	equivalent
	Probe: 1:1 with RF tip
RMS voltmeter	True RMS	Rhode & Schwartz
	Bandwidth: 20 Mhz min.	Model URE3 RMS-P-P
	Sensitivity: 100 ∝V	Voltmeter
Variable-voltage transformer	Adjustable to highest rated input voltage	Agilent 6800 series
or ac source	range. Power: 500 VA
Tektronixs current probe	20mA/div	AM503B
amplifier and power module		TM501 or 2A
Pulse/function generator	+/- 1V Square Wave , 400-1kHz	Agilent 8116A
Load resistor, 20 ohms	20 ohm 10W	0811-3896 or equivalent
Resistor 0.2 ohm	5- 1 ohm resistors in parallel	5 – 0699-0208 or equivalent
Resistor 1k ohm	1k ohm for 15mA range accuracy	0757-0280 or equivalent
Resistor 20K ohm	20k ohm for 0.5mA range accuracy	0757-0449 or equivalent
Resistor 16k ohm	16.2k ohm for rms noise measurements	0757-0447 or equivalent
Resistor 50 ohm	50 ohm series resistor for noise	0757-0706 or equivalent
	measurements
Capacitor 10uF for voltage	3- 3.3uF film type capacitors in parallel	3 – 0160-7308 or equivalent
transient response
Capacitor for current	0.47uF film type capacitor	1060-0970 or equivalent
transient response

Performance & Verification Tests

Enter all of the performance test results and calculated measurements in the Performance Test Record Form that is provided at the end of this section.

Measurement Techniques

If more than one meter or if a meter and an oscilloscope are used, connect each to the terminals by a separate pair of leads to avoid mutual coupling effects. For constant voltage dc tests, connect only to HI sense and LO sense terminals, since the unit regulates the voltage that appears at the sense terminals, not the output terminals. Use twisted-pair wiring to avoid noise pickup on the test leads.

NOTE: When using the Agilent 3458A as an ammeter, always select the specific current measurement range that you will be using. Do not use the autoranging feature of the ammeter, as this may introduce noise in your current measurements by toggling between measurement ranges. Always use the lowest range possible to provide the best measurement accuracy.

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