Ceyear 87234 Series User manual

87234 Series
USB Peak/Avg Power Meter
User's Manual
Ceyear Technologies Co., Ltd.

1
This Manual applies to the following models of USB Peak/Avg Power Meter based on the firmware
version of 1.0 and higher.
87234D USB Peak/Avg Power Meter
87234E USB Peak/Avg Power Meter
87234F USB Peak/Avg Power Meter
87234L USB Peak/Avg Power Meter
Version: C.2 July 2022, Ceyear Technologies Co., Ltd.
Service Consultation: 0532--86889847 400--1684191
Technical support: 0532--86880796
Quality Supervision: 0532--86886614
Fax: [phone]
Website: www.ceyear.com
Email: [email protected]
Address: No. 98, Xiangjiang Road, Qingdao Economic & Technological Development Zone, Shandong Province
Postal code: 266555

1
Foreword
Thank you for choosing and
using 87234 series Peak/Avg
Power Meter developed and
produced by Ceyear
Technologies Co., Ltd.! With
high, precision and frontier
technologies comprehensive,
the product enjoys high
quality and cost performances
compared with similar
products.
We will take the responsibility
to maximally meet your needs
and provide you with
high-quality measuring
instruments and first-class
after-sales service. We aim to
provide "high quality and
considerate service”, and
operate on the principle of
making customers satisfactory
with our products and
services.
Manual No.
AV2.984.1302SS
Version
C.2 2022.07
Ceyear Technologies Co., Ltd.
Manual Authorization
The contents of this manual
are subject to change without
notice. The contents and
terms used in this manual are
interpreted by Ceyear
Technologies Co., Ltd.
The copyright of the manual
belongs to Ceyear
Technologies Co., Ltd, no
modification or alteration can
be made to the manual
contents by any unit or person
without approval of the
Institute, and no reproduction
or propagation of the manual
can be made for profits,
otherwise, Ceyear
Technologies Co., Ltd reserves
the right of pursuing legal
responsibilities from any
infringer.
Product warranty
The warranty period of this
product is 18 months from the
date of shipment. The
instrument manufacturer will
repair or replace the damaged
components according to the
user's requirements and actual
conditions within the warranty
period. For specific
maintenance issues, see the
contract.
Product quality
certificate
This product is guaranteed to
meet the specifications in this
manual from the date of
shipment. The calibration and
measurement are completed
by measuring bodies with
national qualification, with
relevant data to be provided
for reference by users.
Quality/Environmental
Management
This product complies with
the quality and environmental
management systems during
R&D, manufacturing and
testing. Ceyear Technologies
Co., Ltd. is qualified and has
passed ISO 9001 and ISO
14001 management systems.
Safety Precautions
The symbol "Warning"
indicates a hazard. It reminds
the user to pay attention to a
certain operation process,
operation method or the like.
In case of any failure of
observing the rule or
maloperation, personal injury
can occur. Further operation
cannot be proceeded until the
warning conditions are fully
understood and met.
The "Notice" symbol indicates
some important information
which will not cause danger. It
reminds the user to pay
attention to a certain
operation process, operation
method or the like. Failure to
observe the rules or operate
correctly may cause damage
to the instrument or loss of
important data. Proceed to
the next step only after fully
understanding and meeting
the caution conditions
indicated.
Notice
Warning
！

87234 Series USB Peak/Avg Power Meter
Contents
1
Contents
1. Manual navigation.................................................................................................1
1.1. About the Manual .....................................................................................................................1
1.2 Related Documents ...................................................................................................................2
2 Overview...................................................................................................................5
2.1 Product Overview ......................................................................................................................5
2.2 Safe Operation Guide................................................................................................................6
3 Quick Start .............................................................................................................11
3.1 Get Prepared.............................................................................................................................11
3.2 User check.................................................................................................................................17
3.3 Configuration Methods...........................................................................................................19
4 Operation Guide ...................................................................................................25
4.1 Test Panel Introduction...........................................................................................................25
4.2 Test Panel Operation...............................................................................................................34
4.3 Average power measurement ...............................................................................................37
4.4 Pulse power measurement.....................................................................................................38
5. Remote control.....................................................................................................41
5.1 Remote Control Basics............................................................................................................41
5.2 Instrument Program Port and Configuration .....................................................................56

2
5.3 Basic VISA interface programming.......................................................................................56
5.4 I/O library...................................................................................................................................59
6 Troubleshooting and after-sales services.......................................................63
6.1 Working Principles...................................................................................................................63
6.2 Troubleshooting and debugging..........................................................................................64
6.3 Error Messages.........................................................................................................................65
6.4 Method to Obtain After-sales Services ...............................................................................65
7 Technical indicators and testing methods ......................................................67
7.1 Statement ..................................................................................................................................67
7.2 Product features.......................................................................................................................67
7.3 Technical Indicators.................................................................................................................68
7.4 Option Information ..................................................................................................................70
7.5 Additional information............................................................................................................71
7.6 Performance characteristics test ..........................................................................................72

1. Manual navigation
1.1. About the Manual
1
1. Manual navigation
This chapter introduces the user’s manual functions, chapter structure and main contents of the
87234 series Peak/Avg Power Meter, as well as the instrument-related documents provided to users.
About the Manual…………………………………………………………………………………………1
Related Documents………………………………………………………………………………………2
1.1. About the Manual
This manual introduces the basic functions and basic operating methods of the 87234 series
Peak/Avg Power Meter. It describes such contents as product features, basic operations,
configuration guide, menu description, remote control, maintenance, technical indicators and testing
methods, etc. of the instrument to help users get familiar with and master the operation method and
key points of the instrument as soon as possible. To facilitate your skillful use of such instrument,
please read carefully and follow this manual in advance for correct operation.
This manual contains the following chapters:
Overview
This part introduces in general the main performance characteristics, typical application
examples and safety precautions of operation for 87234 series Peak/Avg Power Meter. The
purpose is to enable users to have a preliminary understanding of the main performance
characteristics of the instrument and to guide users to operate the instrument safely.
Quick Start
This chapter introduces the pre-operation inspection, instrument browsing, basic configurations,
configuration window description and data storage of 87234 series Peak/Avg Power Meter. so
that users can have a preliminary understanding of the instrument itself and its configuration
processes as a preparation for the comprehensive introduction of the configuration operations
of the instrument hereinafter. This section contains some contents consistent with the relevant
sections in the Quick Start.
Operation Guide
This guide introduces the operation methods of various configuration functions of the
instrument in detail, including: configuring the instrument, starting the configuration process
and obtaining the configuration results, etc. This part mainly includes two parts: basic operation
guide and advanced operation guide. For users who are not familiar with 87234 series Peak/Avg
Power Meter, the basic operation guide introduces and enumerates each function systematically
and in detail so that users can understand and master some basic usage of the signal generators,
such as setting trigger, time base, and frequency, etc. The advanced operation guide introduces
relatively complicated testing processes and advanced operation skills for users who have basic
knowledge about using the USB Peak/Avg Power Meter but are not familiar with some special
usage, and guides them to implement the measurement processes. Examples include
measurements of pulse modulated signals, CCDF statistical measurements, and the use of gates.
Menus
This part introduce the menu structure and menu items according to the functions to facilitate
the users to query for reference.
Remote Control
The methods for remote control of the instrument are summarized to make users get familiar
with remote control quickly. It is divided into four parts: program control fundamentals,
introducing concepts related to program control, software configuration, program control ports,
SCPI commands, etc; port configuration methods, introducing the connection methods and

1. Manual navigation
1.2 Related Documents
2
software configuration methods for program-controlled ports of 87234 series USB Peak/Avg
Power Meter; basic programming methods for VISA interfaces, giving basic programming
examples in the form of text description and sample codes to enable users to quickly master the
programming methods; I/O function library, introducing the basic concepts of instrument drivers
and the basic installation and configuration instructions of IVI-COM/IVI-C drivers.
Troubleshooting and Repair
This part includes the introduction of the working principles of the instrument, troubleshooting,
error message description and repair methods.
Technical Indicators and Testing Methods
This part introduces the product features, main technical indicators and recommended testing
methods of 87234 series USB Peak/Avg Power Meter.
1.2 Related Documents
The product documentation for the 87234 series USB Peak/Avg Power Meter includes
Quick Start Guide
Online Help
User's Manual
Program Control Manual
Quick Start Guide
It introduces the configuration of the instrument and basic operations for starting configurations
with the purpose of: making users quickly understand the characteristics of the instrument, master
the basic settings and basic local and program-controlled operations. Main chapters include:
Get Prepared
Typical Applications
Get Help
User's Manual
It introduces the functions and operation methods of the instrument in detail, including
configuration, program control, and maintenance, etc.. The purpose is to guide users to fully
understand the functional characteristics of the product and master common testing methods of the
instrument. Main chapters include the following:
Manual Navigation
Overview
Quick Start
Operation Guide
Remote Control
Troubleshooting and Repair
Technical Indicators and Testing Methods
Program Control Manual
It introduces such contents as program control programming foundation, SCPI foundation, SCPI
commands, programming examples and I/O driver function library in detail. The purpose is to guide

1. Manual navigation
1.2 Related Documents
3
users to quickly and comprehensively master the program control commands and methods of the
instrument. Main chapters include the following:
Remote Control
Program Control Commands
Programming Examples
Error Description
Appendixes
Online Help
Online help is integrated in the instrument, providing fast text navigation help to make it convenient
for users in local and remote control operation. Both the hard keys on the front panel of the
instrument or the user interface tool bar offer corresponding shortcut keys to activate this function.
Main chapters are identical to those of the User's Manual.

2Overview
2.1 Product Overview
5
2 Overview
This chapter introduces the main performance characteristics, main applications and main technical
indicators of 87234 series USB Peak/Avg Power Meter. It also gives introductions on correct
operation of the instrument and precautions such as electrical safety.
Product Overview…………………………………………………………………………………………5
Safe Operation Guide……………………………………………………………………………………6
2.1 Product Overview
The 87234 series USB Peak/Avg Power Meter have a frequency range of 50MHz-67GHz and a power
dynamic range of -45dBm ～+20dBm. They are small, light, portable and hot-swappable. They can
be widely used in the testing of microwave signal average power, peak power and other parameters
in the fields of aviation, aerospace, radar, communication, electronic countermeasures, navigation
and so on. The main features of the 87234 series USB Peak/Avg Power Meter are as follows:
1) Accurate Average Power Measurement: The 87234 series USB Peak/Avg Power Meter enable
accurate average power measurements of up to 0.2dB, using a continuous sampling rate of 80MS/s
for high measurement speed and repeatability, with a frequency range up to 67GHz and power
measurement capability down to -45dBm to cover most test applications.
2) Ultra Wide Pulse Power Dynamic Range: The 87234 series USB Peak/Avg Power Meter have a
peak power measurement range of -35dBm ～+20dBm, enabling measurement and analysis of very
small signals at high bandwidths. It also supports external triggering in Average Mode, enabling
pulse power measurements down to -45dBm.
3) Fast Rise and Fall Time: The pulse power and time parameters can be measured in the
development, production, installation and maintenance of radar systems and related components.
The 87234 series has a video bandwidth of up to 30MHz and a rise/fall time of less than or equal to
13ns, allowing signals with a 50ns pulse width to be measured.
4) Internal/External Zeroing: Each 87234 series Peak/Avg power meter can be internally zeroed by
switch control, so there is no need to disconnect the power meter from the device under test during
use, speeding up measurement, reducing connector wear, and lowering measurement uncertainty.
5) Internal/External Trigger: The external trigger can accurately trigger small signals close to the
lower noise limit. The 87234 series has built-in trigger input and trigger output, which can connect
the external trigger of the device under test to the power meter via standard BNC to MMCX cable.
6) Automatic Measurement: The automatic measurement function can help users in complex
measurements without tedious menu settings, and the pulse measurement results can be obtained
with one click, improving user testing efficiency.
7) Statistical Measurement: The 87234 series USB Peak/Avg Power Meter can realize two CCDF
statistical functions. The normal CCDF performs statistical analysis of waveforms in free-run and
continuous trigger modes; the gated CCDF is used in conjunction with the gate signal and performs
statistical analysis of waveforms within the gated signal only.
8) Built-in Radar and Wireless Applications: The 87234 series USB Peak/Avg Power Meter have
built-in radar and wireless presets, including GSM, EDGE, CDMA, WCDMA, BLUETOOTH, WiMAXTM
and LET.
9) Compact and Portable: The 87234 series USB Peak/Avg Power Meter do not require a power host
and can be powered and communicated via the USB 2.0 interface, thus allowing for a portable and
lightweight solution for field testing.

2 Overview
2.2 Safe Operation Guide
6
2.2 Safe Operation Guide
Please read carefully and strictly observe the following precautions!
We will spare no effort to ensure that all production processes meet the latest safety standards and
provide users with the highest safety guarantee. The design and testing of our products and the
auxiliary equipment used meet relevant safety standards, and a quality assurance system has been
established to monitor the product quality and ensure the products to always comply with such
standards. In order to keep the equipment in good condition and ensure operation safety, please
observe the precautions mentioned in this manual. If you have any questions, please feel free to
consult us.
In addition, the correct use of this product is also your responsibility. Please read carefully and
observe the safety instructions before starting to use this instrument. This product is suitable for use
in industrial and laboratory environments or field measurement. Always use the product correctly
according to its restrictions to avoid personal injury or property damage. You will be responsible for
problems caused by improper use of the product or noncompliance with the requirements, and we
will not be held responsible. Therefore, in order to prevent personal injury or property damage
caused by dangerous situations, please always observe the safety instructions. Please keep the
basic safety instructions and the product documentation properly and deliver them to end users.
2.2.1 Safety Marks
2.2.1.1 Product-related Marks
Safety marks on the products are described as follows (Table 2.1):
Table 2.1 Products safety marks
Symbol Meaning Symbol Meaning
Notice, reminding users of
information to be paid special
attention to.
It reminds users of the operation
information or instructions to be
paid attention to.
Power ON/OFF
Notice, handling heavy equipment.
Standby indication
Danger! Hazard of electric shock.
DC
Warning! Hot surface.
AC
Protective conductive end
DC/AC
Ground
Reinforced insulation protection of
the instrument

2Overview
2.2 Safe Operation Guide
7
Ground terminal
EU mark for batteries and
accumulators.
Please refer to Item 1 of "2.2.7
Waste Disposal/Environmental
Protection" in this section for
specific instructions.
Notice, please handle classical
sensitive devices with care.
EU mark for separate collection of
electronic devices.
Please refer to Item 2 of "2.2.7
Waste Disposal/Environmental
Protection" in this section for
specific instructions.
Warning! Radiation.
Please refer to Item 7
of "2.2.4
Operation Precautions" in this
section for specific instructions.
2.2.1.2 Manual-related marks
In order to remind users to operate the instrument safely and pay attention to relevant information,
the following safety warning marks are used in the product manual, which are explained as follows:
Danger mark, personal injury or equipment damage may be caused if not avoided.
Warning mark, personal injury or equipment damage may be caused if not avoided.
Caution mark, slight or medium personal injury or equipment damage may be caused if not avoided.
Notice mark, indicating some important information which will not cause danger.
Tips on information about the instrument and its operation.
2.2.2 Operation Status and Locations
Please note before operating the instrument:
1) Unless otherwise stated, the 87234 series USB Peak/Avg Power Meter have a non-operating
temperature: -40°C ～+70°C; and operating temperature: 0°C to 50°C.
Danger
!
Warning
!
Caution
!
Notice
Tips

2 Overview
2.2 Safe Operation Guide
8
2) Do not place the instrument on surfaces with water, vehicles, cabinets, tables and other objects
that are not fixed. Please place the instrument securely and fix it on the surface of a solid object (e.g.,
an ESD workbench).
3) Do not place the instrument on the surface of a heat-dissipating object (e.g., a radiator). The
operating environment temperature shall not exceed the value specified in the description of
relevant indicators of the product. Overheating of the product will lead to electric shock, fire and
other risks.
4) The instrument is required to be pre-heated for 30 min for cold start, and it will reach internal
temperature balance after pre-heating for 2 h at a stable ambient temperature. After the instrument
is placed at ambient temperature for 2h, preheated and passes thorough user calibration, it should
meet various performance indicators.
2.2.3 Electrical Safety
Precautions for electrical safety of the instrument:
1) Unless otherwise allowed, do not open the housing of the instrument, which may expose
internal circuits and devices of the instrument and cause unnecessary damage.
2) When opening the housing of the instrument, do not place objects not belonging to the interior
of the instrument, otherwise, short circuit, damage to the instrument and even personal injury may
be caused.
3) Unless otherwise stated, the instrument has not received any waterproof treatment, so keep the
instrument from contacting with liquid to prevent damage to the instrument or even personal injury.
4) Do not place the instrument in an environment where fog is easily formed, for example, moving
the instrument in a environment where cold and heat are in alternation, where water droplets
formed on the instrument may cause electric shock and other hazards.
2.2.4 Operation Precautions
1) Instrument operators need to have certain professional and technical knowledge, good
psychological quality, and certain emergency response capabilities.
2) Before moving or transporting the instrument, please refer to the relevant instructions in "2.2.6
Transportation” of this section.
3) The inevitable use of substances (e.g. nickel) in the production process of the instrument may
cause allergy to personnel. If an operator of the instrument has allergic symptoms (e.g. rash,
frequent sneezing, ophthalmia or dyspnea) during the operations, please seek medical care in time
to find out the reason and solve the symptoms.
4) Please refer to the relevant instructions in "2.2.7 Waste Disposal/Environmental Protection” of
this section before disassembling this instrument for disposal.
5) RF instruments will generate high electromagnetic radiation, during which period, pregnant
women and operators with cardiac pacemakers need special protection. If the radiation level is high,
corresponding measures may be taken to remove the radiation sources to prevent personal injury.
6) In case of fire, the damaged instrument will release toxic substances. Therefore, the operators
should wear appropriate protective equipment (e.g. Protective masks and exposure suits) for safety.
7) The EMC grade should meet the requirements specified in 3.9.1 of GJB3947A-2009.
2.2.5 Maintenance
1) Only authorized and specially trained operators are allowed to open the casing of the
instrument. Before such operations, it is required to disconnect the power cord to prevent damage
to the instrument or even personal injury.

2Overview
2.2 Safe Operation Guide
9
2) The repair, replacement and maintenance of the instrument should be performed by dedicated
electronic engineers of the manufacturer, and the parts subject to replacement and maintenance
should receive safety tests to ensure safe use of the product in the future.
2.2.6 Transportation
1) If the instrument is heavy, please handle it with care. If necessary, use tools (a crane, for instance)
to move the instrument so as to prevent damaging the body.
2) The handle of the instrument is suitable for personal handling of the instrument and cannot be
fixed on the transportation equipment when during the transportation of the instrument. In order to
prevent property loss and personal injury, please follow the manufacturer's safety regulations on the
transportation of the instrument.
3) When operating the instrument on the vehicle, the driver should drive carefully to ensure
transportation safety, and the manufacturer is not responsible for any emergencies during the
transportation. Therefore, please do not use this instrument during the transportation, and
reinforcement and preventive measures should be taken to ensure the transportation safety of the
product.
2.2.7 Waste disposal/environmental protection
1) Do not dispose of devices marked with batteries or accumulators together with unclassified
waste; Instead, such devices should be collected separately and disposed of in a suitable collection
location or through the customer service center of the manufacturer.
2) Do not dispose of waste electronic devices together with unclassified waste; Instead, such
devices should be collected separately. The manufacturer has the right and responsibility to help end
users dispose of waste products. If necessary, please contact the customer service center of the
manufacturer for corresponding disposal so as not to damage the environment.
3) During mechanical or thermal processing of the product or its internal components, toxic
substances (dust of heavy metals, such as lead, beryllium, and nickel, etc.) may be released.
Therefore, specially trained technicians with relevant experience are required to disassemble the
product to avoid personal injury.
4) During the reprocessing, please refer to the safety operation rules recommended by the
manufacturer to dispose of toxic substances or fuel released from the product with specific methods
to avoid causing personal injury.

3Quick Start
3.1 Get Prepared
11
3 Quick Start
This chapter introduces the pre-operation precautions and the common basic configuration
methods of the 87234 series USB Peak/Avg Power Meter. so that users can have a preliminary
understanding of the instrument itself and its configuration processes.
Get Prepared………………………………………………………………………………………………11
User Check…………………………………………………………………………………………………17
Basic Configurations………………………………………………………………………………………19
3.1 Get Prepared
Avoid damaging the instrument
Pay attention to the follow to avoid electric shock, fire and personal injury:
Do not open the cabinet arbitrarily;
Do not try to disassemble or refit any part of the instrument not mentioned in the manual.
Otherwise, such consequences as reduced electromagnetic shielding property and internal
component damage can occur, affecting product reliability. If the product is under warranty, we
will no longer provide free maintenance.
Please carefully read the relevant contents in "2.2 Safe Operation Guide" of this manual and the
safety precautions therein for operation. Also please pay attention to the requirements for
specific operating environment mentioned in the data page.
Electrostatic Protection
Take electrostatic protection measures at workplaces to avoid any damage caused by the instrument.
For details, please refer to the relevant contents in "2.2 Safe Operation Guide" of the manual.
Notice
Warning
!

3Quick Start
3.1 Get Prepared
12
Pay attention to the following when operating the instrument:
Improper operation location or configuration may damage the instrument or the connected
instruments. Pay attention to the following before powering on the instrument:
Keep the instrument dry;
Keep the instrument level, and arrange it properly;
Make sure the environment temperature meets with the requirement noted in the data page;
Make sure the port input signal amplitude is within the range specified;
Make sure the signal output port is connected properly, without any overload.
Effect of electromagnetic interference (EMI)
Electromagnetic interference will affect the configuration result, therefore, please:
Select proper shield cables. For example, to use the double-shielded RF/network connection
cable;
Please close any cable connection port that is enabled but temporarily unused or connect a
matching load to the connection port in time;
Please refer to the EMC level labels in the Data Page.
3.1.1 Environmental Requirements
The operation sites of 87234 series USB Peak/Avg Power Meter should meet the following
environmental requirements:
1) Operating environment
The operating environment should meet the following requirements:
Table 3.1 Environmental requirements of 87234
Temperature 0°C~50°C
Humidity When the temperature is lower than 10 ℃
, the humidity is not
controlled
When temperature range is 10℃-30 ℃
, the relative humidity is
(5-95)%
When temperature range is 30℃- 40℃, th
e relative humidity is
(5-75)%
When the temperature is above 40 ℃
, the relative humidity is
(5-45)%
Elevation 0 - 4,600 m
Vibration Frequency 5 Hz ~500 Hz
Notice
Tips

3Quick Start
3.1 Get Prepared
13
The above environmental requirements are only applicable to the operating environment factors of
the instrument, and are not with the scope of technical indicators.
2) Electrostatic protection
Static electricity is extremely destructive to electronic components and equipment. Usually we take
two anti-static measures: conductive table mat and wrist strap; Conductive floor mat and ankle strap.
Using the above two anti-static measurements at the same time can provide good antistatic
protection. If using one of them, only the former can provide antistatic protection. 1MΩ earth
isolation resistor must be provided for the antistatic components at least for ensuring user safety.
Correctly take the following antistatic measures to techniques to reduce electrostatic damages:
Ensure all instruments are grounded properly, so as to avoid any static electricity.
Let the internal/external conductor of the cable contact the ground shortly before connecting
the coaxial cable with the instrument.
Operators must wear anti-static wrist straps or take other antistatic measures before touching
the joints, core or conducting any assembly.
Voltage range
The above-mentioned anti-static measures cannot be applied when the voltage exceeds 500V.
3.1.2 Correct Use of connectors
Connectors are often used in various tests of USB Peak/Avg Power Meter. Although the connectors
of calibration pieces, test cables and analyzer measuring ports are designed and manufactured
according to the highest standards, the service life of all these connectors is still limited. Due to the
inevitable wear and tear during normal use, the performance indicators of the connectors will
decrease or even be unable to meet the measurement requirements. Therefore, correct maintenance
and measurement connection of the connectors can not only ensure accurate and repeatable
measurement results, but also prolong the service life of the connectors and reduce the
measurement costs. In actual use, the following aspects should be paid attention to:
1) Connector check
When conducting connector inspection, anti-static wrist band should be worn. It is recommended to
use a magnifier to check the following items:
a) Whether the electroplated surface is worn or not and whether there are deep scratches;
b) Whether the thread is deformed;
c) Whether there are metal particles on the threads and the joint plane of the connector;
d) Whether the inner conductor is bent or broken;
e) Whether the screw sleeve of the connector rotates improperly.
Notice
Warning
!

3Quick Start
3.1 Get Prepared
14
Check the connector to prevent damaging ports of the instrument
Any damaged connector may damage the good connector connected to it even when measuring the
connection for the first time. In order to protect each interface of the signal generator itself, the
connector must be checked before connector operation.
2) Connection method
Before the connection, the connectors should be inspected and cleaned to ensure cleanness and
intactness. Anti-static wrist straps should be worn before connection. The correct connection
method and steps are as follows:
Step 1. As shown in Figure 3.1, align the axes of the two interconnecting devices to ensure that the
pin of the male connector slides concentrically into the socket of the female connector.
Figure 3.1 Axes of interconnected devices are in a straight line
Step 2: as shown in Fig.3.2, move the two connectors leveled together so that they can be smoothly
engaged. Rotate the screw sleeve of the connector (note, not the rotating connector itself) until it is
tightened, and there can be no relative rotational movement between the connectors during the
connection.
Fig.3.2 Connection method
Step 3. As shown in Figure 3.3, tighten the connectors with a torque wrench to complete the
connection. Pay attention that the torque wrench should not exceed the initial folding point. Use an
auxiliary wrench to prevent the connector from rotating.
Fig.3.3 Finish the connection with a torque wrench
Caution
!

3Quick Start
3.1 Get Prepared
15
3) Disconnection method
Step 1. Support the connectors to prevent any connector from being twisted, shaken or bent;
Step 2. An open-ended wrench can be used to prevent the connector body from rotating;
Step 3. Loosen the screw sleeve of the connector with another wrench;
Step 4. Rotate the screw sleeve of the connector by hand to complete the disconnection;
Step 5. Pull the two connectors levelly apart.
4) Usage of a torque wrench
The use of a torque wrench is shown in Fig.3.4. The following points should be paid attention to
when using it:
Confirm that the torque of the torque wrench is correct set before use;
Ensure that the angle between the torque wrench and another wrench (used to support a
connector or a cable) is within 90obefore applying force;
Grasp the end of the torque wrench handle gently, and apply force in the direction
perpendicular to the handle until reaching the folding point of the wrench.
Fig.3.4. Usage of a torque wrench
5) Use and storage of connectors
a) The connectors should be covered by protective sleeves when not in use;
b) Do not mix various connectors, air lines and standard calibration pieces in a box because this is
one of the most common causes of connector damage;
c) Keep the connectors and the analyzer at the same temperature. Holding a connector by hand or
cleaning a connector with compressed air will significantly change its temperature. The connectors
should be calibrated after its temperature is stable;
d) Do not touch the joint plane of the connectors because the grease and dust particles on the skin
are difficult to be removed from the joint plane;
e) Do not put the contact surface of a connector downward on a hard table surface. Contact with
any hard surface may damage the electroplated layer and the joint surface of the connector;
f) Always wear anti-static wrist straps and work on a grounded conductive workbench pad, which
can protect the analyzer and the connectors from electrostatic discharge.
6) Connector cleaning
When cleaning the connectors, always wear antistatic wrist straps and observe the following steps:
a) Remove loose particles on the thread and joint plane of the connectors with clean low-pressure
air, and thoroughly inspect the connectors. If further cleaning treatment is required, proceed as
follows:

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3.1 Get Prepared
16
b) Soak (but not thoroughly soak) a lint-free cotton swab with isopropyl alcohol;
c) Remove the dirt and debris from the joint plane and threads of the connectors with cotton swabs.
When cleaning the inner surface of a connector, be careful not to apply external force to the central
inner conductor and not to leave the fibers of cotton swabs on the central conductor of the
connector.
d) Let the alcohol volatilize, then blow the surface clean with compressed air;
e) Check the connector to make sure that it is free of particles and residues;
f) If any defects of the connector is still obvious after cleaning, it indicates that the connector may
have been damaged and should not be used again. Make clear the cause of the connector damage
before connection.
7) Use of adapters
When the measurement port of the power meter and the connector type used are different,
adapters must be used for the connection before measurement. In addition, even if the
measurement port of the power meter and the connector type of port of the DUT are the same, it is
also advisable to use adapters. Both cases can protect the measurement port, prolong its service life
and reduce the maintenance cost. Before connecting an adapter to the measurement port of a
power meter, it is required to carefully check and clean the adapter. And a high-quality adapter
should be used to reduce the influence of mismatching on measurement accuracy.
8) Joint plane of connectors
An important concept in microwave measurement is reference plane. And an analyzer, it is the
benchmark reference plane for all measurements. During the calibration, the reference plane is
defined as the plane where the measurement port and the calibration standard are engaged. Good
connection and calibration depend on thorough and level contact between the connectors on the
joint plane.
Fig.3.5 Calibration plane
3.1.3 Routine Maintenance
This section describes the routine maintenance of the 87234 series USB Peak/Avg Power Meter.
1) Cleaning instrument surface
Please follow the steps below when cleaning the surface of the instrument:
Step 1. Shut down the instrument and disconnect the power cord connected to it.
Step 2. Wipe the surface gently with dry or slightly wet soft cloth, and do not wipe the inside of the
instrument.
Step 3. Do not use chemical cleaners, such as alcohol, acetone or dilutable cleaners.
2) Test Port Maintenance
Damage to the connector of 87234 series USB Peak/Avg Power Meter or the presence of dust inside
the connector will affect the test results. Please maintain such kind of connectors as follows:

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3.2 User check
17
The connectors should be kept away from dust and kept clean;
To prevent electrostatic discharge (ESD), do not directly contact the joint surface;
Do not use damaged connectors;
Please use an air blower to clean the connectors instead of using tools such as sandpaper to
grind the surface of the connector.
3.2 User check
3.2.1 Unpacking
3.2.1.1 Visual Examination
Step 1: check whether the outer package and the shockproof packing of the instrument are
damaged. If there is any damage, keep the outer package for standby and proceed with the
following examination steps.
Step 2: unpack, and check the mainframe and articles provided in the package for any damage;
Step 3: check carefully the articles mentioned above as per Table 3.2 for any problem;
Step 4: in case of any outer package damage, or damage or problem to the instrument or articles
provided in the package, never power the instrument on or start it up! Please contact our service
consultation center with the service hotline provided on the cover, and we will repair or change it as
soon as possible accordingly.
3.2.1.2. Model Confirmation
Table 3.2 List of articles provided together with 87234
Name Quantity Function
Mainframe:
87234 1 Mainframe
Standard Configuration:
Power cable 1 USB power supply and communication
Trigger cable 2 Trigger input/output
CD 1 Program
Packing list 1 —
Product Certificate of Conformity 1 —
3.2.2 Power-on test
1) Turning on/off the power
The 87234 series USB Peak/Avg Power Meter are powered by the USB2.0 interface of the host
computer, with a supply voltage of +5V and a supply current of 500mA. Connect the USB Peak/Avg
power meter to the USB port of the host computer via the USB cable when in use; and unplug the
USB cable after use to power off the instrument.