User Manual

Adjustment Proc

edures

9. Adjust the power supply to output approximately 7 V.

10. Adjust the ÷ 50 gain adjustment until the D MM measuring the output reads 1/50 of the same voltage (≈140 mV) as the

DMM monitoring

the input within ± 5 mV.

11. Keep the probe o

utput connections for the next step.

12. Disconnect the

probe head from the power supply.

Offset (Final)

NOTE. The offset and gain adjustments interact.

1. Repeat steps 1

through 6 of the Offset (preliminary) procedure.

2. Remove the out

put cable termination from the BNC-to-male banana adapter and the probe Y lead input from the

DC voltage source for the next procedure.

DC CMRR

1. Setup the equipment as shown below:

a. Connect a B NC cable from the output of the 1103 power supply to the Channel 1 input of the oscilloscope. If the

scope does not have 50 Ω input setting, add a 50 Ω inline BNC terminator at the scope input.

b. Connect the Y-lead adaptor to the probe input. Using square pins, connect both leads to the red binding post of a

binding-post-to-BNC adaptor that is connected to the function generator.

c. If the function generator reference (shield of the BNC connector) is isolated from ground, connect the ground

lead from the probe case to the black binding post.

NOTE. Do not use the BNC-to-probe tip adaptor for this connection. The power level of the generator will exceed

the terminator rating.

d. Connect a second BNC cable from the function generator Trigger or Sync Output to the External Trigger or Channel

2 Input of the oscilloscope.

46 P6250 & P6251 Technical Reference