Fluke 5720A service manual Set the Oscilloscope Differential Amplifier controls as shown below

5700A/5720A Series II Calibrator

Service Manual

OUTPUT	SENSE
	HI
	LO
	GRD GND

CALIBRATOR

(UUT)

SHIELDED

TWISTED PAIR

OSCILLOSCOPE

MAINFRAME*

7A22

PLUG-IN

VERTICAL

OUTPUT

COAX

TRUE RMS

VOLTMETER

CLIP LEADS

3' APPROX

GR BANANA PLUGS

BNC

* OSCILLOSCOPE AND AC DIFFERENTIAL

SHIELDED TWISTED PAIR CABLE DETAIL VOLTMETER SHOULD BE ISOLATED FROM THE POWER LINE GROUND.

F3-15.EPS

Figure 3-19. DC Voltage Output Noise Test Setup

2. Set the Oscilloscope Differential Amplifier controls as shown below.

Low Frequency -3 dB	10 Hz
High Frequency -3 dB	10 kHz
Input Coupling	AC (both inputs)
Volts/Div	50 μV (Var. to Cal.)

3.Set the Oscilloscope Time/Div for 2 ms.

4.Set the rms voltmeter range to 1V.

5.Set the Calibrator to 2.2V dc, operate. Verify that the reading on the rms voltmeter is less than 150 mV.

NOTE

This test assumes that the amplifier plug-in and scope have a gain equal to 0.5V divided by the input/div. setting, which in the above case is 1x104.

6.Repeat the above process for the remaining tabulated settings shown in Table 3-49; verify that the rms meter indicates less than the amount shown for each required output level.

7.Press RESET on the Calibrator and disconnect the test configuration.

3-44