Agilent 6A User Datasheet

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Agilent 54006A High Frequency Probe

User’s Guide

Agilent Technologies

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Notices

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright lays.

Manual Part Number

54006-90002

Edition

June 2007 Printed in USA

Agilent Technologies, Inc. Digital Signal Analysis Division 1400 Fountaingrove Parkway Santa Rosa, CA 95403, USA

Warranty

The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warranties, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein. Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement shall control.

Safety Notices

CAUTION

Caution denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in damage to or destruction of the product. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met.

WARNING

Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning sign until the indicated conditions are fully understood and met.

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54006A User’s Guide

The Agilent 54006A—at a glance

The Agilent 54006A high frequency probe provides passive probing of high speed logic circuits and low impedance circuits. The major advantage of this probe is the small amount of capacitive probe tip loading (approximately 250 fF). This makes it possible to probe high frequency circuits without disturbing the circuit with a large capacitive load. Two probe body assemblies are provided with the 54006A giving you the choice of 10:1 and 20:1 probe tip division ratios that may be used with any 50 ohm input instrument. The 20:1 probe assembly is 5 mm (0.2 in.) longer than the 10:1 probe assembly.

Contents Unpacking the Probe 4

Using the Probe 5

To replace the probe resistor 6

To protect against electrostatic damage 7 Specifications and Characteristics 9 Replaceable Parts 12 Contacting Agilent 13

Preparing the probe for shipping 13

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54006A User’s Guide

Unpacking the Probe

1 Inspect the shipment including the shipping container and probe for damage.

CAUTION Do not bend the coaxial cable to a radius of less than 1 in (2.54 cm) or internal

damage to the cable may occur.

2 Locate the shipping list. Verify that you received all the accessories on this list,

and all the options that you ordered. The following list shows some of the items that may be on the shipping list. The information on your actual shipping list is more accurate and should supersede the information in this list.

❒ 10:1 probe body assembly ❒ 20:1 probe body assembly ❒ Packag of five 450Ω resistor replacements and one sleeve ❒ Packag of five 950Ω resistor replacements and one sleeve ❒ Coaxial cable, 91 cm (36 in.) long, SMA male connectors ❒ DC blocking capacitor ❒ SMA (f) to BNC (m) adapter

Notice that the 20:1 probe assembly is 5 mm (0.2 in.) longer than the 10:1 probe assembly.

If anything is missing or defective, contact your nearest Agilent Technologies Service Office. Refer to “Contacting Agilent” on page 13. If the shipment was damaged, contact the carrier, then contact the nearest Agilent Sales Office. Keep the shipping materials for the carrier’s inspection. The Agilent Sales Office will arrange for repair or replacement at Agilent’s option without waiting for claim settlement.

3 Select one of the probe body assemblies and attach it to either end of the

coaxial cable supplied with the probe. The SMA connector can either be finger tight or torqued to 5 in. lbs.

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54006A User’s Guide

Using the Probe

The 54006A high frequency probe may be used with any 50-ohm input instrument. Figure 1 shows the correct technique for holding the probe while making measurements. Hold the probe by its SMA connector. Placing your hand closer to the probe tip adds capacitance to the probe and degrades the probe response.

CAUTION Do not bend the coaxial cable to a radius of less than 1 in (2.54 cm) or internal

damage to the cable may occur.

Figure 1. Correct method of holding the probe

Electrostatic Buildup Before connecting the probe to the digitizing oscilloscope or digital communi-

cations analyzer, eliminate electrostatic buildup from the probe cable. Electrostatic discharge can damage the instrument’s inputs. To discharge the probe cable, connect a female short to either end of the cable. Also, briefly touch a short to the instrument’s input connector. Always wear a wrist strap connected to an antistatic mat. Refer to “To protect against electrostatic damage”

on page 7 for information on setting up a static safe workstation.

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54006A User’s Guide

Using the Probe

Connector Savers The supplied probe cable has a male connector on each end. If your instru-

ment has a connector saver (female-to-female adapter) use it to connect the probe to the instrument’s input connector. Using a connector saver prevents damage to the precision male input connectors on the instrument. The connector saver's part number is 5061-5311.

Oscilloscope’s Probe Attenuation Setting

Probe Resistor Tips The resistor probe tips are susceptible to wear depending on the amount of

On the oscilloscope, change the probe attenuation setting to 10:1 or 20:1 depending on which divider you are using with the probe. The oscilloscope will now display the correct volts-per-div ranges and display the correct voltage levels when voltage measurements are made with the probe.

The resistor probe tips are precut at the factory to a recommended maximum length. This recommended length allows for a probe tip input capacitance of approximately 250 fF. Longer resistor leads add input capacitance and shorter resistor leads decrease the input capacitance. If the resistor lead is completely cut off, the probe's input capacitance will approach 100 fF.

usage. Because the resistor probe tips a consumable part that may require periodic replacement, a package of five resistor replacements are supplied for each of the probe tips. For instructions on ordering additional resistor replacement packages, referred to replaceable parts section. To replace a resistor probe tip, refer to “To replace the probe resistor” on page 6.

To replace the probe resistor

To replace the resistor inside the probe assembly, perform the following steps.

1 If the probe is connected to an instrument, use a wrist strap which is attached

to an antistatic mat. Detach the probe from the instrument.

2 Unscrew the probe sleeve (MP3/MP4) from the probe assembly.

Figure 2. Probe Sleeve and Resistor

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54006A User’s Guide

Using the Probe

3 Pull the resistor (R1/R2) out of the probe assembly.

4 Obtain a new resistor from the bag of five resistor replacements.

5 Insert the resistor lead into the center hole located on the probe assembly

socket.

6 Screw the probe sleeve into the probe assembly.

7 Attach a female short to the cable’s SMA connector and touch the short to any

test set’s connector hex nuts. Reattach the probe to the instrument.

To protect against electrostatic damage

Electrostatic discharge (ESD) can damage or destroy the input circuits of an instrument that the probe is connected to. ESD can also damage or destroy electronic components that you are measuring. All work should be performed at a static-safe work station. Figure 3 on page 8 shows an example of a staticsafe work station (without the instrument) using two types of ESD protection:

• Conductive table-mat and wrist-strap combination.

• Conductive floor-mat and heel-strap combination.

Both

types, when used together, provide a significant level of ESD protection.

Of the two, only the table-mat and wrist-strap combination provides adequate ESD protection when used alone. To ensure user safety, the static-safe accessories must provide at least 1 MΩ of isolation from ground. Refer to Table 1 for information on ordering static-safe accessories.

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54006A User’s Guide

Using the Probe

W A R N I NG These techniques for a static-safe work station should not be used when working

on circuitry with a voltage potential greater than 500 volts.

Figure 3. Static-Safe Accessories

Reducing ESD Damage

The following suggestions may help reduce ESD damage that occurs during testing and servicing operations.

• Personnel should be grounded with a resistor-isolated wrist strap before removing any assembly from the unit.

• Be sure all instruments are properly earth-grounded to prevent a buildup of static charge.

Table 1. Static-Safe Accessories

Part Number Description

9300-0797

9300-0980 Wrist-strap cord 1.5 m (5 ft)

9300-1383 Wrist-strap, color black, stainless steel, without cord, has four adjustable links

9300-1169 ESD heel-strap (reusable 6 to 12 months).

3M static control mat 0.6 m (The wrist-strap and wrist-strap cord are not included. They must be ordered separately.)

and a 7 mm post-type connection.

× 1.2 m (2 ft× 4 ft) and 4.6 cm (15 ft) ground wire.

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54006A User’s Guide

Specifications and Characteristics

This chapter lists specification and characteristics of the Agilent 54006A. Figures in this section show the characteristic step response of the probe. Notice that cable length affects the probe's response. Using longer or higher loss cables degrades the probe's response even more.

• Specifications describe warranted performance over the temperature range listed in the table (unless otherwise noted). All specifications apply after the probe’s temperature has been stabilized after 15 minutes of continuous operation.

• Characteristics provide useful information by giving functional, but nonwarranted, performance parameters. Characteristics are printed in italics.

Table 2. Specifications and Characteristics

Bandwidth

Input Resistence 10:1 probe

Input Resistence 20:1 probe

Maximum input voltage 20 Vpeak

Use indoor

Input capacitance 250 fF (characteristic)

Temperature

Humidity Operating - up to 95% (characteristic)

Altitude 4,600 meters (15,000 feet) (characteristic)

Length 91 cm (36 in.) (characteristic)

Connectors SMA male

a. Driven by a 25 ohm source. b. 1% probe resistor terminated into nominal 50 ohm oscilloscope input.

dc to 6 GHz

500Ω

1 kΩ

–25

° C (–13° F ) to +65° C (149° F) (characteristic)

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54006A User’s Guide

Specifications and Characteristics

Figure 4. Characteristic step response of 500Ω probe to 50 ps step without 36” cable

Figure 5. Characteristic step response of 500Ω probe to 50 ps step with 36” cable

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54006A User’s Guide

Specifications and Characteristics

Figure 6. Characteristic step response of 1 kΩ probe to 50 ps step without 36” cable

Figure 7. Characteristic step response of 1 kΩ probe to 50 ps step with 36” cable

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54006A User’s Guide

Replaceable Parts

Agilent Part

Part

C1 11742A 1 DC blocking capacitor

Number

Qty Description

MP1 54006-67601 1

MP2 54006-67602 1

MP3 54006-21701 1 Sleeve for MP1

MP4 54006-21702 1 Sleeve for MP2

MP5 1250-2015 1 Adapter, SMA (f) to BNC (m)

MP6 54006-68701 1

MP7 54006-68702 1

R1 0699-2370 1

R2 0699-2371 1

W1 8210-4977 1 Coaxial cable, SMA (m-m), 36 inches

Probe body assembly for 450Ω resistor

Probe body assembly for 950

Pack of five 450

Pack of five 950Ω resistors for R1 and 1 extra MP4

Thick film resistor, 950

Thick film resistor, 450

Ω resistors for R2 and 1 extra MP3

Ω resistor

Ω resistor, 1W

Ω resistor, 0.8W

Figure 8. Agilent 54006A Replaceable Parts

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54006A User’s Guide

Contacting Agilent

For technical assistance, you can contact your local Agilent call center. In the Americas, call 1 (800) 452-4844. In other regions, visit http://www.agilent.com and click Contact Us. Before returning an probe for service, you must first call the Instrument Support Center, in all regions, at (800) 403-0801. Any special arrangements for the probe can be discussed at this time. This will help the service office repair and return your probe as quickly as possible.

If the probe is under warranty or is covered by an Agilent maintenance contract, it will be repaired under the terms of the warranty or contract. If the probe is no longer under warranty or is not covered by an Agilent maintenance plan, Agilent will notify you of the cost of the repair after examining the unit. When an probe is returned to a Agilent service office for servicing, it must be adequately packaged and have a complete description of the failure symptoms attached. When describing the failure, please be as specific as possible about the nature of the problem.

Preparing the probe for shipping

1 Write a complete description of the failure and attach it to the probe. Include

any specific performance details related to the problem. The following information should be returned with the probe.

• Type of service required.

• Date probe was returned for repair.

• Description of the problem:

• Whether problem is constant or intermittent.

• Whether probe is temperature-sensitive.

• Whether probe is vibration-sensitive.

• Performance data.

• Company name and return address.

• Name and phone number of technical contact person.

• Model number of returned probe.

• Full serial number of returned probe.

• List of any accessories returned with probe.

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54006A User’s Guide

Contacting Agilent

CAUTION Cover electrical connectors to protect sensitive components from electrostatic

damage. Cover optical connectors to protect them from damage due to physical contact or dust.

CAUTION Probe damage can result from using packaging materials other than the original

materials. Never use styrene pellets as packaging material. They do not adequately cushion the probe or prevent it from shifting in the carton. They may also cause probe damage by generating static electricity.

2 Pack the probe in the original shipping containers. Original materials are

available through any Agilent office. Or, use the following guidelines:

• Wrap the probe in antistatic plastic to reduce the possibility of damage caused by electrostatic discharge.

• For probes weighing less than 54 kg (120 lb), use a double-walled, corrugated cardboard carton of 159 kg (350 lb) test strength.

• The carton must be large enough to allow approximately 7 cm (3 inches) on all sides of the probe for packing material, and strong enough to accommodate the weight of the probe.

• Surround the equipment with approximately 7 cm (3 inches) of packing material, to protect the probe and prevent it from moving in the carton. If packing foam is not available, the best alternative is S.D-240 Air Cap™ from Sealed Air Corporation (Commerce, California 90001). Air Cap looks like a plastic sheet filled with air bubbles. Use the pink (antistatic) Air Cap™ to reduce static electricity. Wrapping the probe several times in this material will protect the probe and prevent it from moving in the carton.

3 Seal the carton with strong nylon adhesive tape.

4 Mark the carton “FRAGILE, HANDLE WITH CARE”.

Retain copies of all shipping papers.