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.
© Copyright Agilent Technologies 1991-2004
All Rights Reserved
Agilent Technologies 1153A
Differential Probe

2
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
3
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

5
1
General Information

6
General Information
Introduction
This chapter covers the following information:
• Inspection
• Cleaning
• Accessories supplied
• Accessories available
• Specifications
• Characteristics
• General characteristics

7
General Information
To inspect the probe
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.

8
General Information
Accessories Supplied
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

9
General Information
Accessories Supplied
Figure 1-1
1153A Differential Probe and Accessories
423
1
5
6
7
8

10
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

11
General Information
Characteristics
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