YOKOGAWA 701989 User manual

User’s
Manual Model 701989
PBL250 Logic Probe
IM 701989-01E
5th Edition

i
IM 701989-01E
Foreword
Thank you for purchasing the PBL250 250 MHz Logic Probe (Model
701989). This user’s manual describes the functions, operating procedures,
specifications, handling precautions, and other important information about the
PBL250 Logic Probe. To ensure correct use, please read this manual before
beginning operation. After reading this manual, keep it in a convenient location
for quick reference in the event a question arises during operation.
Manual Title Manual No. Description
Model 701989
PBL250 Logic Probe
User’s Manual
IM 701989-01E This manual. It explains the functions,
operating procedures, specifications, handling
precautions, and other important information
about the PBL250 Logic Probe.
The “E” in the manual number is the language code.
Contact information of Yokogawa offices worldwide is provided on the following
sheet.
Document No. Description
PIM 113-01Z2 List of worldwide contacts
Notes
• The contents of this manual are subject to change without prior notice
as a result of continuing improvements to the product’s performance and
functionality. The figures given in this manual may differ from those that
actually appear on your product.
• Every effort has been made in the preparation of this manual to ensure the
accuracy of its contents. However, should you have any questions or find any
errors, please contact your nearest YOKOGAWA dealer.
• Copying or reproducing all or any part of the contents of this manual without
the permission of YOKOGAWA is strictly prohibited.
Revisions
• 1st Edition November 2008
• 2nd Edition August 2014
• 3rd Edition January 2016
• 4th Edition April 2021
• 5th Edition January 2022
5th Edition: January 2022 (YMI)
All Rights Reserved. Copyright © 2008 Yokogawa Electric Corporation
All Rights Reserved. Copyright © 2014 Yokogawa Test & Measurement Corporation

ii IM 701989-01E
The following markings are used in this manual.
Improper handling or use can lead to injury to the user or
damage to the instrument. This symbol appears on the
instrument to indicate that the user must refer to the user’s
manual for special instructions. The same symbol appears in
the corresponding place in the user’s manual to identify those
instructions. In the manual, the symbol is used in conjunction
with the word “WARNING” or “CAUTION.”
WARNING Calls attention to actions or conditions that could cause serious
or fatal injury to the user, and precautions that can be taken to
prevent such occurrences.
CAUTION Calls attention to actions or conditions that could cause
light injury to the user or damage to the instrument or user’s
data, and precautions that can be taken to prevent such
occurrences.
French
AVERTISSEMENT Attire l’attention sur des gestes ou des conditions
susceptibles de provoquer des blessures graves (voire
mortelles), et sur les précautions de sécurité pouvant
prévenir de tels accidents.
ATTENTION Attire l’attention sur des gestes ou des conditions
susceptibles de provoquer des blessures légères
ou d’endommager l’instrument ou les données
de l’utilisateur, et sur les précautions de sécurité
susceptibles de prévenir de tels accidents.
Note Calls attention to information that is important for proper
operation of the instrument.

iii
IM 701989-01E
Checking the Contents of the Package
The accessories below are included. If some items are missing or otherwise
inconsistent with the contents description, please contact your dealer or nearest
YOKOGAWA representative.
• PBL250 probe: 1
• Standard accessories: 1 set
• Carrying case: 1
1
2
3
4
5
6
7
8
9
10 11
12
PBL250 Logic Probe
Name Qty. Part Number
1 Logic probe 1 −
2 Probe lead set 1 B8099BT
3 Cable (1 m) 1 B8099BZ
Standard Accessories
Name Qty. Part Number
4 Stacking holder 2 −
5 Clip lead 50 mm 8 −
6 GND lead 75 mm 8 −
7 GND lead 250 mm 2 −
8 Microclips (black, set of 10) 1 B9852VX
9 Microclips (red, set of 8) 1 B9852VY
(with number labels)
10 Number labels 1
11 Stacking spacer 2 −
12 Manuals IM 701989-01E 1 This manual
IM 701988-92 1 Document for China
IM 701988-93Z2 1 Document for Korea
PIM 113-01Z2 1 List of worldwide contacts
Accessories (Sold Separately)
Name Part Number
IC clips (set of 10) B9852ES
Accessory kit 701909
Accessory Kit
Name Qty.
Stacking holder 5
Clip lead 50 mm 8
GND lead 75 mm 8
GND lead 250 mm 2
Microclips (black, set of 10) 1
Microclips (red, set of 8) 1
Number labels 1
Stacking spacer 8
Removable GND terminal 5

iv IM 701989-01E
Safety Precautions
This product is designed to be used by a person with specialized knowledge.
The following safety precautions must be taken to ensure safe and correct
operation of the instrument. The instrument’s functions may not work if used in
a manner not described in this manual. YOKOGAWA bears no responsibility for,
nor implies any warranty against damages occuring as a result of failure to take
these precuations.
This manual is part of the product and contains important information. Store
this manual in a safe place close to the instrument so that you can refer to it
immediately. Keep this manual until you dispose of the instrument.
Safety Symbols and Wording Used in This Manual
Handle with care. Refer to the user’s manual or service manual. This
symbol appears on dangerous locations on the instrument which require
special instructions for proper handling or use. The same symbol appears
in the corresponding place in the manual to identify those instructions.
French
À manipuler délicatement. Toujours se reporter aux manuels d’utilisation
et d’entretien. Ce symbole a été apposé aux endroits dangereux de
l’instrument pour lesquels des consignes spéciales d’utilisation ou de
manipulation ont été émises. Le même symbole apparaît à l’endroit
correspondant du manuel pour identifier les consignes qui s’y rapportent.
Important Warnings and Information for Users
For safe operation and proper use of the instrument’s functions, please heed the
following warnings and safety precautions.
W WARNING
• Take care to avoid electric shock when connecting the probe to the
circuit under test.
• Never disconnect the probe from the oscilloscope while connected to
the circuit under test.
• Do not allow the probe to become wet, and do not handle the probe with
wet hands. Doing so can result in electric shock.
• Before connecting the probe’s lead set to the circuit under test, confirm
that the oscilloscope is properly grounded, and that the probe’s cable is
connected to the oscilloscope’s logic signal input port.
• Ground the Oscilloscope
Be sure to implement the oscilloscope’s protective earth ground.
• Maintain Nondestructive Input Voltages
Do not apply a voltage between input and ground exceeding ±40 V
(DC + ACpeak).
• Do not use the probe in humid locations
To avoid electric shock, never use the probe in areas of high humidity.

v
IM 701989-01E
• Do not use the probe near flammable gases.
To avoid injury and fire, do not use the probe near flammable or
explosive gasses or vapors.
• Avoid exposed circuits.
To prevent injury, when the power is ON, do not touch any exposed
contact points or components.
CAUTION
• Be sure to use the accessory probe lead set when connecting to the
circuit under test.
• The instrument’s GND lead is of the same electric potential as the
grounding of the connected oscilloscope.
• This is a precision-manufactured instrument. Damage can occur as a
result of sudden changes in ambient temperature or physical shocks.
Handle with care.
• To prevent trouble such as breakages or contact failures, please note
the following when handling the cable connected to the instrument.
• Do not apply force to the connectors.
• Never bend the cable to a radius of less than 60 mm.
• Never apply force to a small part of the cable, nor deform the cable.
• Never twist or pull the probe leads or GND lead any more than
necessary. The wires inside the leads can break, causing malfunction.
• Avoid vibration, shock, and static electricity when transporting or
handling the instrument. Especially take care not to shock the instrument
such as by dropping it.
• Avoid storing or using the probe in direct sunlight, or areas that have
high heat, humidity, or condensation. The probe can become deformed
or its insulation can deteriorate, resulting in the probe failing to meet its
specifications.
• Before use, inspect and check the operation of the probe to confirm that
no problems have been caused by harsh storage or transport conditions.
If problems are found, please contact your nearest Yokogawa dealer or
representative.
• This instrument is not drip- or dust-proof. Do not use in areas where it
may come into contact with water or a large amount of dust.

vi IM 701989-01E
French
W AVERTISSEMENT
• Veillez à éviter toute électrocution lors de la connexion de la sonde au
circuit à tester.
• Ne déconnectez jamais la sonde de l’oscilloscope lorsqu’elle est
connectée au circuit à tester.
• Veillez à ce que la sonde se soit pas mouillée et ne manipulez pas la
sonde avec les mains mouillées. Cela peut provoquer une électrocution.
• Avant de connecter le jeu de fils de la sonde au circuit testé, vérifiez que
l’oscilloscope est correctement mis à la terre et que le câble de la sonde
est connecté au port d’entrée du signal logique de l’oscilloscope.
• Mettez l’oscilloscope à la terre
Assurez-vous que l’oscilloscope est bien mis à la terre.
• Maintenez des tensions d’entrée non destructives
N’appliquez pas de tension entre l’entrée et la terre supérieure à ±40 V
(CC + CApeak).
• N’utilisez pas la sonde dans des endroits humides
Pour éviter tout risque d’électrocution, n’utilisez jamais la sonde dans
des zones très humides.
• N’utilisez pas la sonde à proximité de gaz inflammables.
Pour éviter toute blessure et incendie, n’utilisez pas la sonde à proximité
de gaz ou de vapeurs inflammables ou explosifs.
• Évitez les circuits exposés.
Pour éviter toute blessure lorsque l’appareil est sous tension, ne touchez
aucun point de contact ou composant exposé.
ATTENTION
• Assurez-vous d’utiliser le jeu de fils de la sonde accessoire lors de la
connexion au circuit à tester.
• Le fil GND de l’instrument a le même potentiel électrique que la mise à
la terre de l’oscilloscope connecté.
• Il s’agit d’un instrument de précision. Des dommages peuvent survenir
à la suite de changements soudains de température ambiante ou de
chocs physiques. Manipulez avec précaution.
• Pour éviter des problèmes tels que des ruptures ou des défauts de
contact, veuillez noter ce qui suit lors de la manipulation du câble
connecté à l’instrument.
• N’appliquez pas de force sur les connecteurs.
• Ne pliez jamais le câble à un rayon inférieur à 60 mm.
• N’appliquez jamais de force sur une petite partie du câble, et ne
déformez pas le câble.
• Ne tordez jamais ou ne tirez jamais les fils de la sonde ni le fil GND plus
que nécessaire. Les fils à l’intérieur peuvent casser et provoquer un
dysfonctionnement.

vii
IM 701989-01E
• Évitez les vibrations, les chocs et l’électricité statique lors du transport
ou de la manipulation de l’instrument. Faites particulièrement attention à
ne pas heurter l’instrument, en le faisant tomber par exemple.
• Évitez de stocker ou d’utiliser la sonde à la lumière directe du soleil ou
dans des zones à forte chaleur, humidité ou condensation. La sonde
peut se déformer ou son isolation peut se détériorer, ce qui fait que la
sonde ne répond pas à ses spécifications.
• Avant toute utilisation, inspectez et vérifiez le fonctionnement de la
sonde pour confirmer qu’aucun problème n’a été provoqué par des
conditions de stockage ou de transport difficiles. Si des problèmes
sont détectés, veuillez contacter votre revendeur ou représentant
YOKOGAWA le plus proche.
• Cet instrument n’est pas étanche aux gouttes d’eau ou à la poussière.
Ne l’utilisez pas dans des zones où il peut entrer en contact avec de l’eau
ou une grande quantité de poussière.
Operating Environment Restrictions
Please note that there are restrictions on the operating environment.
CAUTION
This product is a Class A (for industrial environments) product. Operation
of this product in a residential area may cause radio interference in which
case the user will be required to correct the interference.
French
ATTENTION
Ce produit est classé dans classe A (pour utilisation dans des
environnements industriels). L’utilisation de ce produit dans un zone
résidentielle peut entraîner une interférence radio que l’utilisateur sera tenu
de rectifier.

viii IM 701989-01E
Regulations and Sales in Various Countries and Regions
Waste Electrical and Electronic Equipment (WEEE)
(EU WEEE Directive valid only in the EEA* and UK WEEE Regulation in
the UK)
This product complies with the WEEE marking requirement. This marking
indicates that you must not discard this electrical/electronic product in
domestic household waste. When disposing of products in the EEA or
UK, contact your local Yokogawa office in the EEA or UK respectively.
* EEA: European Economic Area
Authorized Representative in the EEA
Yokogawa Europe B.V. is the authorized representative of Yokogawa Meters
& Instruments Corporation for this product in the EEA. To contact Yokogawa
Europe B.V., see the separate list of worldwide contacts, PIM 113-01Z2.
Disposal
When disposing of this instrument, follow the laws and ordinances of the country
or region where the product will be disposed of.

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IM 701989-01E
Contents
Foreword............................................................................................................................i
Checking the Contents of the Package............................................................................ iii
Safety Precautions........................................................................................................... iv
Regulations and Sales in Various Countries and Regions..............................................viii
Overview...........................................................................................................................1
Names and Functions of Parts..........................................................................................2
Usage Precautions............................................................................................................3
Operating Procedure.........................................................................................................3
Product Specifications ......................................................................................................8

1
IM 701989-01E
Overview
The PBL250 is an 8-bit input logic probe with a maximum toggle frequency of
250 MHz that is used with oscillscopes equipped with logic input.*
* For oscilloscope models that are compatible with this instrument, please contact
your nearest YOKOGAWA representative.
Features
• Highinputimpedance(100kΩ,3pF:eachinputterminaltoground)
• Supports high speed signals (maximum toggle frequency of 250 MHz)
• Supports 2.54 mm pitch pin headers
• Also supports narrow pitch ICs with IC clips (sold separately)
• Several attachments for a variety of probing tasks
• A single probe head or multiple stacked probe heads can be attached directly
to 2.54 mm pitch pin headers, making probing of these headers easy.
• Easy-to-manage probe lead set
• Number tags for easy identification of the measured bit
• Compact and lightweight

2IM 701989-01E
Names and Functions of Parts
Probe head
GND terminal
Signal input terminal
Removable GND
terminal
GND terminal
Common GND
terminal
Probe lead set Logic probe Cable
Probe Lead Set
Connects the probe heads for each bit to the logic probe, and consists of 8 probe
leads and 2 common GND terminals.
Probe Heads
Connect directly to 2.54 pitch pin headers on the circuit board, or to the circuit
under test using various attachments.
Removable GND terminal
A ground terminal that can be removed in order to attach a separate GND lead in
case the GND terminal on the circuit board is separated from the signal terminals.
Common GND terminals
The points of connection for 250 mm GND leads. They are of the same electric
potential as the GND terminals on the ends of the leads and the grounding of the
connected oscilloscope.
Cable
Connects to the oscilloscope’s logic signal input port.

3
IM 701989-01E
Usage Precautions
CAUTION
• The cable and probe lead set are connected to the probe at the
time of shippment. Do not remove prior to using the probe. Accurate
measurements cannot be guaranteed if the cable or probe lead set is
removed and replaced with one intended for another instrument model.
• When cleaning, use a soft cloth and take care not to damage the probe.
Also, never immerse the instrument in liquid, or use abrasive cleaning
agents. Likewise, never use benzine or other volatile solvents.
French
ATTENTION
• Le câble et le jeu de fils de la sonde sont connectés à la sonde lors de
l’expédition. Ne les retirez pas avant d’utiliser la sonde. Des mesures
précises ne peuvent pas être garanties si le câble ou le jeu de fils de
la sonde est retiré et remplacé par un autre destiné à un autre modèle
d’instrument.
• Lors du nettoyage, utilisez un chiffon doux et veillez à ne pas
endommager la sonde. De plus, n’immergez jamais l’instrument dans un
liquide et n’utilisez jamais de produits de nettoyage abrasifs. De même,
n’utilisez jamais d’essence ou d’autres solvants volatils.
Never use the probe near transformers, large currents, or other sources of
strong magnetic fields, or near high-field sources such as wireless devices.
Measurement accuracy may be compromised.
Operating Procedure
Preparing for Measurement
1.
Only use this logic probe with compatible oscilloscopes*.
2.
Connect the logic probe’s cable to the oscilloscope’s logic signal input
port.
3.
Connect the logic probe’s probe and GND leads to the circuit under test.
* For oscilloscope models that are compatible with this logic probe, please
contact your nearest YOKOGAWA representative.

4IM 701989-01E
Usage Example
Connecting Directly to 2.54 mm Pitch Pin Headers on the PCB
Probe head
Connection Using a 75 mm GND Lead
Removable GND
terminal
Connects to a separated GND
using a 75 mm GND lead
GND lead

5
IM 701989-01E
Connection Using a 250 mm GND Lead
Connect a 250 mm GND lead to a common GND terminal, then connect to GND
on the PCB. The GND terminal can be removed to attach the lead.
Using a longer GND lead lowers performance.
250 mm GND lead
Common GND terminal
Connecting to an IC Using Microclips
Connect a 50 mm clip lead to the signal input terminal and a 75 mm GND lead
to the GND terminal, then connect microclips to the ends of both leads.

6IM 701989-01E
Stacking Multiple Probe Heads for Connecting to Pin Header
Stacking holder
Multiple probe heads
are stacked using a
stacking holder Connects to pin headers all at once
To remove the stacking holder, pinch the grooved portion with your fingertips. If
the stacking holder is difficult to remove, insert a thin flat object such as a ruler
into the groove.
Stacking holder
Groove
Connection Using a 250 mm GND Lead (Inserting/Removing
Multiple Bits at Once)
Connect a 250 mm GND lead to a common GND terminal, then connect to GND
on the PCB.
Using a longer GND lead lowers performance.
250 mm GND lead
Common GND terminal

7
IM 701989-01E
Inserting/Removing Multiple Adjacent Probe Head Stacks
When connecting multiple PBL250 Logic Probes, you can arrange probe head
stacks side-by-side or back-to-back. If the GND terminal is separated, connect
a 250 mm GND lead to a common GND terminal, then connect to GND on the
PCB.
Using a longer GND lead lowers performance.
250 mm GND lead
Common GND
terminal
Connection Using a Stacking Spacers
When stacking the probe heads, you can connect probe heads to only the
desired pins by using stacking spacers.
Stacking spacers

8IM 701989-01E
Product Specifications
Electrical Specifications
Inputs 8
Vertical resolution 1 bit
Max. nondestructive
input voltage range1
±40 V (DC + ACpeak) or 28 Vrms
Threshold level range ±6 V
Threshold level resolution 0.05 V
Threshold level accuracy2±(100 mV + |3% of setting|)
Input voltage range ±6 V around the threshold level setting value
Min. input voltage2300 mVp-p
Hysteresis voltage With noise rejection OFF: 100 mV (typical)3
With noise rejection ON: 250 mV (typical)3
Input impedance 100kΩ/3pF(typical)3
Max. toggle frequency2250 MHz or more
Min. pulse width22 ns
Bit-to-bit skew 1 ns
1. See derating of input voltage by frequency
2. Standard operating conditions, after warm-up.
3. A typical value is a typical or average value. It is not strictly guaranteed.
0
10
110 100
40
10
00
100
Input voltage derating by frequency
Frequency (MHz)
Max. nondestructive input voltage
(Vpeak)

9
IM 701989-01E
General Specifications
Standard operating
conditions
Temperature 23±5°C
Humidity455 ±10% RH
Operating
environment
Temperature 5 to 40°C
Humidity420 to 80% RH
Altitude 2000 m or less
Storage environment Temperature −20to60°C
Humidity420 to 80% RH
Altitude 3000 m or less
Interface and power supply Dedicated logic probe interface
Power supplied from a dedicated logic probe
interface
Calibration cycle 1 year
Warm-up time 30 minutes or more
Ext. dimensions (main body) 94.5 mm × 40 mm × 15 mm
Total length Approximately 1.7 m
Weight Approximately 200 g (excluding accessories)
4. No condensation
Standards Compliance
EMC
standards
Emissions Conforming standards
EN61326-1 ClassA
EN55011 Class A Group1
EMC standards of Australia and New Zealand EN55011
Class A, Group1
Korea Electromagnetic Conformity Standard ( 한국
전자파적합성기준 )
This is a Class A product. Operation of this product in a
residential area may cause electromagnetic interference
in which case the user will be required to correct the
interference.
Immunity Conforming standard
EN61326-1 Table 2 (for use in industrial locations)
Influence in the immunity testing environment
The logic probe’s polarity must not reverse5
Environmental
standards6
EU RoHS Directive compliant
5. Test conditions
Connected to the DLM2000 series mixed signal oscilloscope, with the logic probe’s
leadsetterminatedat50Ω.
Cable condition
Attach a ferrite core (TDK: ZCAT2035-0930A, YOKOGAWA part number:
A1190MN) to both ends of the cable (see figure below).
6 For conformity to environmental regulations and/or standards other than EU,
contact your nearest YOKOGAWA office (PIM113-01Z2).

10 IM 701989-01E
Maintenance
Users can replace the cable or probe lead set themselves if they become
damaged. Please use the following components.
Name Part Number
Probe lead set B8099BT
Cable (1 m) B8099BZ
Replacing the Probe Lead Set
Remove the probe lead set from the logic probe, then align the new probe lead
set with the guide on the probe and insert as shown in the figure below.
Guide