Agilent Technologies 1141A, 1142A Bandwidth

34

Calibration Tests and Adjustment

Bandwidth

Bandwidth

This test checks the high-frequency response of the 1141A Differential Probe. The

bandwidth of the oscilloscope is characterized first so it is not a factor in the

measurement.

Specification (-3dB, dc coupled): dc to 200 MHz

Equipment Required

Procedure

This test depends on the accuracy of the termination on the test board and the

termination in the oscilloscope. Both should be with 1%.

1With the N cable and N-to-BNC adapter, connect the signal generator to the

oscilloscope channel 1 input.

2Set the signal generator for 200 MHz at 0 dBm (about 224 mVrms).

3Set the 1142A front panel switches to Local and Zero offset.

4On the oscilloscope press AUTOSCALE, then set the following parameters.

5The signal on screen should be about six divisions amplitude.

Measure the peak-to-peak voltage of the channel 1 signal and record the

reading.

Vp-p (1) = _____________ mV

Equipment

Required

Critical Specifications Recommended

Model/Part

Oscilloscope 400 MHz bandwidth 54830A

Signal Generator 200 MHz at ≈ 230 mVrms 8648A

Test Board No substitute 01141-66504

Cable Type N (m) 24-inch 11500B

Adapter Type N (f) to BNC (m) 1250-0077

Menu Selection Setting

TIMEBASE (time/div) 2 ns/div

CHAN 1 (sensitivity)

(input R)

100 mV/div

50 Ω DC

ACQUISITION Sampling Mode

Memory Depth

Sample Rate

Averaging

# of avg

Real Time

Automatic

Automatic

Enabled

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Contents

Main Agilent Technologies 1141A Differential Probe and 1142A Probe Control and Power Module Page Contents Page Introduction Accessories Supplied Page Accessories Available The following accessories can be ordered. To inspect the probe To inspect the probe Using the probe with other instruments Recommended Test Equipment Setting up the probe Initial Adjustment Page Using the Accessories Page Page Page Page Grounding Coupling Functions Page Page Remote operation Cleaning Requirements Differential Amplifiers and CMRR Page Page Equipment Required Introduction Equipment Required The Test Board The Test Board Calibration Tests dc Gain Accuracy dc Gain Accuracy Page Page Vout Vin --------------Vout1Vout2 ----------------------------------= () 2 Vin Page Page Bandwidth Page CMRR Test Page Page Calibration Test Record Probe Adjustment Adjustments Probe Adjustment Page Adjustment Procedure Page Page Page Page Page Adjustment Procedure Attenuator Adapter Adjustment Attenuator Adapter Adjustment Page Page Page Page Introduction Performance Specifications and Characteristics Performance Specifications and Characteristics Page Page General Characteristics General Characteristics Theory of Operation Theory of Operation Differential Probe Control and Power Module Theory of Operation Attenuator Adapters Page Service Policy Troubleshooting Probe Troubleshooting Probe Control and Power Module Troubleshooting Page Removing and Replacing Assemblies Differential Probe Page Probe Adapters Page Probe Control and Power Module Replaceable Parts Parts List Ordering Information Direct Mail Order System Manufacturers Codes Page Page Page Page Page Page 1141A and 1142A Replaceable Parts Page Page Page Page Page Locator Table for Control and Power Supply Page Page Index Agilent Technologies P.O. Box 2197 1900 Garden of the Gods Road Notices Manual Part Number Warranty Technology Licenses Restricted Rights Legend Product Safety Notices Warnings To clean the instrument Safety Symbols !