Dc Cmrr; Figure 12: Setup For Dc Cmrr And Ac Cmrr Adjustments - Tektronix P6248 Service Manual

1.7 ghz (typical) differential probe

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Adjustment Procedures

DC CMRR

1. Set up the equipment as shown. (See Figure 12.)

a. Connect a BNC cable from the output of the 1103 to the Channel 1 input

of the oscilloscope. If the oscilloscope does not have 50 Ω input setting,

add a 50 Ω in-line BNC terminator at the oscilloscope input.

b. Connect the Y-lead adapter to the probe input.

c. Using square pins, connect both leads to the red binding post of a binding

post to BNC adapter.

d. Connect the BNC adapter to the function generator output. (If necessary,

use a BNC cable and a female-to-female BNC connector between the

BNC adapter and the generator.) 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 adapter for this connection. The power

level of the generator will exceed the terminator rating.

2. Connect a second BNC cable from the function generator Trigger or Sync

Output to the External Trigger or Channel 2 input of the oscilloscope.

3. Set the probe to ÷1 attenuation.

P6248 1.7 GHz Differential Probe Service Manual

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