Agilent Technologies 1153A Troubleshooting guide

User and Service Guide

Publication number 01153-97004

July 2004

For Safety and Regulatory information, see the pages after the

index.

Agilent Technologies 1153A

Differential Probe

Agilent Technologies 1153A Differential Probe

The 1153A Differential Probe allows measurement of small differential

signals in the presence of much larger common-mode signals. The

probe has the following major features:

• 200 MHz bandwidth

• AutoProbe probe interface

• Variable offset

• Lf (low frequency) reject

• Ac coupling

The variable offset capability can be used to measure small ac signals in

the presence of much larger dc levels.

The probe can be used with instruments employing the Agilent

AutoProbe probe interface, such as the Infiniium family of

oscilloscopes

Accessories Supplied

The following accessories are supplied. See “Accessories supplied” in chapter 1 for a

complete list.

• 10:1 attenuator adapter

• 100:1 attenuator adapter

• ac coupling attenuator adapter

• Miscellaneous small accessories

• Carrying Case

Contents

1 General Information

To inspect the probe 7

To clean the probe 7

Accessories Supplied 8

Accessories Available 10

Characteristics 11

General Characteristics 12

2 Operating the Probe

Using the accessories 17

Grounding 21

Coupling functions 22

Differential amplifiers and CMRR 24

3Service

Introduction 26

Safety 26

Service Strategy 26

To return the probe to Agilent Technologies for service 27

Probe troubleshooting 28

Preparing the probe for troubleshooting 28

Troubleshooting the probe 28

Removing and replacing the assemblies 30

Differential Probe 30

Probe Adapters 32

Replaceable Parts 34

Ordering replacement parts 34

Replaceable parts 35

General Information

Introduction

This chapter covers the following information:

• Inspection

• Cleaning

• Accessories supplied

• Accessories available

• Specifications

• Characteristics

• General characteristics

General Information

To inspect the probe

• Inspect the shipping container for damage.

Keep a damaged shipping container or cushioning material until the contents of the

shipment have been checked for completeness and the instrument has been checked

mechanically and electrically.

• Check the accessories

Accessories supplied with the instrument are listed in “Accessories Supplied” later

in this chapter.

• If the contents are incomplete or damaged notify your Agilent Technologies sales

office.

• Inspect the instrument.

• If there is mechanical damage or defect, or if the instrument does not operate

properly or pass calibration tests, notify your Agilent Technologies Sales Office.

• If the shipping container is damaged, or the cushioning materials show signs of

stress, notify the carrier as well as your sales office. Keep the shipping material

for the carrier’s inspection. The Agilent Technologies office will arrange for repair

or replacement at Agilent Technologies option without waiting for claim

settlement.

To clean the probe

If this probe requires cleaning, disconnect it from the oscilloscope and clean it with a

mild detergent and water. Make sure the instrument is completely dry before

reconnecting it to the oscilloscope.

General Information

Accessories Supplied

The following items are supplied as part of the 1153A probe. Item

numbers refer to the numbers in the figures on pages 9 and 10.

Accessories supplied with Probe System

Item Description Qty Part Number

1 Differential Probe 1

2 10:1 Attenuator Adapter 1 5063-2144

3 100:1 Attenuator 1 5063-2145

4 ac Coupling Adapter 1 5063-2146

5 Two-inch Extension Leads (package 5) 1 5959-9334

6 Mini Grabber 2 1400-1422

7 Five-inch Ground Lead 1 5061-6162

8 Shielded Signal Lead 1 01141-68702

9 Test Board 1 01141-66504

10 Flat-blade Alignment Tool 1 8710-1961

11 Circuit Connection Posts (strip of 20) 1 1251-5943

General Information

Accessories Supplied

Figure 1-1

1153A Differential Probe and Accessories

423

General Information

Accessories Available

Figure 1-2

1153A Miscellaneous Accessories

Accessories Available

The following accessories are available for use with the 1153A:

• 5959-9335 Long Extension Lead (5.5 inch/14 cm), package of 5

• 5090-4833 SMT clip, package of 20

• 10467-68701 Micro Clip, package of 4

General Information

Characteristics

The following table gives characteristics for the probe.

Table 1-1

Characteristics

Parameter Probe alone With 10:1 attenuator With 100:1 attenuator

System bandwidth 200 MHz with 54800 family of oscilloscopes

dc gain accuracy 2.0% with 50 ±0.1 Ωload 4.0% with 50 ±0.1 Ωload

Maximum Input Voltage

(see figure1-3)

±200 V(dc + peak ac), CAT I

CMRR See the figure 1-4

Rise Time 1.75 ns calculated from tr = (0.35/bandwidth)

Linear differential input range

DC mode with no offset ±300 mV peak ±3.0 V peak ±30 V peak

with IF reject or appropriate offset ±18 Vdc, decreasing to

±300 mv at 30 Hz

±180 Vdc, decreasing to

±3.0 V at 30 Hz

±500 Vdc, decreasing to

±30 V at 30 Hz

Common-mode operating

range dc ±18 Vdc ±180 Vdc ±500 Vdc

dc to 30 Hz linear decreased to 30 Hz value

30 Hz to 200 MHz ±0.5 V peak ±5 V peak ±50 V peak

dc offset range ±18 V ±180 V ±500 V

Input Impedance Resistance

Capacitance

1 MΩ

7 pF

9 MΩ

3.5 pF

10 MΩ

2 pF

ac coupling low-frequency1

response (-3dB)

15 Hz 1.5 Hz 1.5 Hz

LF reject response 1.7 Hz (LFR1) and 0.14 Hz (LFR2)

Output termination impedance 50 Ω

Displayed noise ≤500 µVrms

Overload recovery < 1 ms from overdrive that is less than the common mode range

1For maximum signal fidelity above 100 MHz, limit the probe input (without attenuators) to ≤300 mV peak-to-peak

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