Ceyear 3656 Series User manual

1
3656 Series
Vector Network Analyzer
Quick Start Guide

This guide is applicable to Vector Network Analyzer of the following models, based on firmware
of version 1.0 or above.
3656A Vector Network Analyzer
3656B Vector Network Analyzer
3656D Vector Network Analyzer

Preface
Thank you for choosing 3656
Series Vector Network
Analyzer developed and
produced by the CETI . As a
high-grade, precise and
advanced product, this Tester
has higher cost performance of
its kind.
We will try our best to meet
your needs as our
responsibility is to provide
high quality instruments for
you and also bring you first-
class after-sales service. We
always persist in “Good
Quality, Satisfied Service”and
promise to offer satisfactory
products and service for you.
Manual No.
AV2.733.1058SK
Ver. No.
A.4 2018.3
China Electronics Technology
Instruments Co., Ltd (CETI)
Manual Authorization
The information contained in
this manual is subject to changes
without notice. And the
explanation right of all the
content and the terms in this
Guide belongs to China
Electronics Technology
Instruments Co., Ltd (CETI).
The copyright of the Guide
belongs to China Electronics
Technology Instruments Co.,
Ltd (CETI). Other entities and
individuals can’t change or
juggle it without our permission,
and can’t copy and spread for
business benefits. If discovered,
we have the right for the legal
action.
Product Warranty
From the date of production,
warranty period of this product
is 18 months. Within warranty
period, we will repair or replace
the damaged parts according to
the actual situations. This
requires users to return the
product back to the
manufacturer and prepay the
postage, which will be returned
together after maintenance.
Certificate of Quality
We ensure that this product
meets the indexes in the manual
from the date of production.
Calibration measurements will
be carried out and finished by
measurement unit with national
qualification, providing users
with relevant information for
reference.
Quality/Environment
Management
This product strictly adheres to
quality and environmental
management system in the
whole process from research and
development, manufacturing to
testing. China Electronics
Technology Instruments Co.,
Ltd (CETI) has got the ISO
9001 and ISO 14001 system
certifications.
Safety Precautions
“Warning”denotes a
hazard. It calls attention to a
particular operating
procedure, method, or other
similar situations which, if
not correctly performed or
not adhered to, could result in
personal injury. Don’t
continue the next step until
you have fully understood
and met the indicated
warning conditions.
The sign of CAUTION
represents important tips, but
no danger. It calls attention to
a particular operating
procedure, method, or other
similar situations which, if
not correctly performed or
not adhered to, could result in
damage to the instrument or
loss of important data. Don’t
continue the next step until
you have fully understood
and met the indicated
attention conditions.
WARNING
CAUTION

Contents
1. Manual Overview.......................................................................................1
1.1 About Manual ...........................................................................................................................1
1.2 Relevant Files............................................................................................................................1
2. Ready for Use.............................................................................................4
2.1 Pre-operation Preparations........................................................................................................4
2.2 Startup and Shutdown...............................................................................................................6
2.3 Front Panel................................................................................................................................7
2.4 Operating Interface ...................................................................................................................8
2.5 Rear Panel.................................................................................................................................9
Chapter III Typical Applications...............................................................11
3.1 Filter Test................................................................................................................................12
3.2 Amplifier Test.........................................................................................................................22
3.3 Customization of TRL Cal Kit................................................................................................26
3.4 Limit Test................................................................................................................................31
4 Getting Help................................................................................................36
4.1 Basic Check.............................................................................................................................36
4.2 Help Information.....................................................................................................................37
4.3 Repair Methods.......................................................................................................................38
Appendix I: Technical Indicators ..................................................................39
Annex II: Accessories/Options List...............................................................43

Manual Overview
1
1. Manual Overview
This chapter introduces the structure and main content of 3656 Series Vector Network Analyzer
Quick Start Guide, and also the relevant files provided to users with instrument.
1.1 About Manual
This manual introduces basic functions and basic operating methods of 3656 Series Vector
Network Analyzer and contains content such as operating guide before startup, characteristics of
front and rear panel of product, basic operating method and examples with simple fault diagnosis
and repair methods etc. in order to understand and grasp operating methods and key points in
usage. For your proficiency of the instrument, please read the manual carefully and operate
properly upon instructions in the manual before operation.
Quick Start Guide for 3656 Series Vector Network Analyzer contains chapters as follows:
Ready for Use
This Chapter introduces preparations before operation, startup and operation, panel introduction
etc. of 3656 Series Vector Network Analyzer. Through this chapter, you may acquire knowledge
of 3656 Series Vector Network Analyzer on the whole, and make a well preparation for proper
and safe operation.
Typical Application
It introduces test cases such as the setup before measurement, calibration setup, and filter test of
3656 Series Vector Network Analyzer. In addition, steps and operating methods of basic
measurement of 3656 Series Vector Network Analyzer are also introduced. By reading this
chapter, you may acquire knowledge of 3656 Series Vector Network Analyzer as soon as possible
and use it to finish tests over DUT.
Getting Help
This chapter contains fault diagnosis and solutions and repair method.
1.2 Relevant Files
3656 Series Vector Network Analyzer product files include:
Quick Start Guide
User Manual

Manual Overview
2
Programming Manual
Online Help
Quick Start Guide
This manual introduces instrument startup and basic operating methods of measurement in order
to make users understand characteristics of instrument and grasp basic setup, basic local and
distance control operating methods. It mainly contains:
Manual Overview
Ready for Use
Typical Application
Getting Help
User Manual
This manual introduces instrument functions and operating methods in details, including:
information on measurement setup, data analysis, calibration methods, and technical parameters
etc. in order to guide users to obtain knowledge on product functions and characteristics on the
whole and grasp testing methods of instruments in common use. It mainly contains:
Overview
Routine Maintenance
Operation Introduction
Measurement Setup
Optimizing Measurement
Calibration
Time Domain Measurement
Working Principle and Technical Parameters
Programming Manual
This manual introduces remote programming basics, SCPI basics, SCPI commands, programming
examples etc. in order to guide users to grasp program control commands and methods rapidly and
fully. It mainly contains:
Distance Control
Program Control Commands
Programming Examples
Error Description
Appendix
Online Help

Manual Overview
3
Online help is integrated in the instruments, which provides rapid document navigation service to
make local and distance operation convenient for users. All front panel keys of instrument or user
interface menu have corresponding shortcut keys to activate this function.

Ready for Use
4
2. Ready for Use
3656 Series Vector Network Analyzer is designed with neat appearance and comfortable operation.
Its largest overall dimension is only 233mm (H) × 435mm (W) × 348mm (D) with a maximum
weight of 16kg, which is smaller and lighter than pervious Vector Network Analyzers. This
Chapter mainly introduces instrument testing environment, power supply, and structures etc.
2.1 Pre-operation Preparations
This Section describes precautions before initial use of 3656 Series Vector Network Analyzer. It
meets security requirements specified in GJB3947A-2009. Please read the following precautions
carefully and prevent damage to instruments or unnecessary personal injury.
To prevent damage to instruments and avoid electric shock, fire and personal injury:
Do not open instrument without authorization;
Do not attempt to disassemble or modify any part not described in this manual.
Disassembly at your own discretion might cause various consequences such as degradation of
electromagnetic shielding performance and damage to internal parts, thus affecting product
reliability. We will no longer provide free maintenance if disassembly without authorization
occurs, even during warranty period.
2.1.1 Environment
To ensure the service life and measurement validity & accuracy of 3656 Series Vector Network
Analyzer, please use instrument under following conditions:
1. Temperature range:
Storage temperature range: -20°C～+70°C
Operating temperature range: 0°C～+40°C
2. Low air pressure:
In this guide, front panel keys are indicated as 【XXX】and XXX is key name. Menu items and
soft key menu are indicated as [XXX] and XXX is menu name.
警告
！
注意
Caution
WARNING

Ready for Use
5
Low air pressure(altitude): 0～4600m
2.1.2 Power Supply
3656 Series Vector Network Analyzer uses 220V or 110V alternating currents. The requirements
of analyzer on external power supply are listed in the following table:
Table 2-1 Requirements of Power Supply
Power Supply Parameters
Applicable Range
Output Voltage
AC220V
AC110V
Output Power
>150W
>150W
Operating Frequency
50Hz
50/60Hz
To prevent or reduce damage to hardware of Analyzer due to mutual disturbance generated by
different equipment through power supply, especially potential destruction of Analyzer hardware
caused by peak pulse disturbance generated by high-power equipment, 220V or 110V AC
stabilized voltage supply is preferred to supply power for Analyzer.
To prevent damage to instruments and personal injury:
Do not use power cord without protection;
Properly ground the protection cord of power supply socket. Do not float or keep improper
grounding.
2.1.3 ESD Protection
Pay attention to ESD protection when using instruments. The following ESD protection measures
shall be taken if possible:
1. Ground yourself before cleaning and checking test port of instrument or connecting. You may
realize it via grabbing metal case of grounded instrument or shell of test cable connector.
2. Ground central conductor of cable first before connecting cable to instrument and performing
testing: connect short circuit on one end of cable and make central conductor and external
conductor short-circuit. When wearing antistatic wrist strap, you shall grab the shell of cable
connector and connect the other end of cable and remove short-circuit.
警告
！
WARNING

Ready for Use
6
3. Perform testing on worktables with grounded and conductive mats; wear antistatic ankle strap
when working in areas with conductive ground surface. You’d better wear antistatic ankle strap
whether you could confirm the conductivity of ground surface or not.
2.2 Startup and Shutdown
Before powering on 3656 Series Vector Network Analyzer, please check power supplying
equipment as required in 2.1.2 “Power Supply Requirements”. Do not power on instrument until
confirming that power supplying device is in normal condition.
2.2.1 Startup
Connect AC POWER with three-core power cord in conformity with requirements of international
security standard. Press 【ON/STANDBY】key in bottom left corner on front panel. Analyzer
will take 40s to enter Windows system and start running main process of measurement. In order to
stabilize performance of internal parts and obtaining better testing results, it is recommended to
pre-heat for 30 minutes before measurement.
2.2.2 Shutdown
Press 【ON/STANDBY】key on bottom left corner of front panel of the analyzer. Do not hold it
down for long or do not release it. The analyzer will exit from measurement application process
automatically, turn off Power of its own and enter into Standby status. Please switch power switch
on rear panel to Off or pull out power cord if required when the analyzer is under standby status.
The analyzer may sometimes fail to respond to operation of mouse or keyboard as
abnormalities of operating system or application process. if it occurs, you may turn it off by
holding 【ON/STNDBY】key for at least 4s. However, it shall be avoided in normal
conditions, as unstable system might be led to. Although the analyzer will recover to normal
When the analyzer works on a rack, you must guarantee smooth cross-ventilation between
internal instrument and external instrument. Whenever thermal power inside rack increases
for 100W, ambient temperature (outside rack) is required to be 4°C lower than maximum
working temperature of the analyzer. If total thermal power exceeds 800W then compulsory
air cooling measures must be taken.
注意
Caution
警告
！
WARNING

Ready for Use
7
conditions in most cases, it does not mean that this is a safe operating method.
2.3 Front Panel
This section describes front panel of 3656 Series Vector Network Analyzer in details, as shown in
Figure 2.1:
Figure 2.1 Front Panel of 3656 Series Vector Network Analyzer
The features of front panel keys are described as below:
Table 2-2 Description of Front panel keys
S/N
Name
Description
1
LED Screen
The instrument is equipped with a 10.4-inch LED screen with a resolution
of 800×600, which displays all measurement related information.
2
ON/Standby
Used for choosing between power-on or standby state of the analyzer,
yellow indicator on the right side of the swich is lit in the standby state;
press the swich once ,the indicator turning to green, which indicates the
instrument is under “Working” status.
3
Ground
Terminal
Connected to the chassis of the analyzer. You may insert antistatic wrist
strap plug here when operating the instrument.
4
USB Port
Used to connect keypad, mouse or other USB devices.
5
Test Ports
Include 2 ports of N-type female which the DUT is connected, switching
between signal source and receiver. While signals are being output from a
test port , the yellow LED above the test port is lit.
6
Utility Block
The keys related to the store and recall function, record function, macro
function, preseting analyzer, printing and help etc.
7
Trace/Channel
Used to select active traces and channels on display of the analyzer.
8
Stimulus Block
For Setting up frequency range, sweep type and trigger mode of the signal
sources and triggers.
9
Entry Block
The keys are used to enter numeric data for measure setting, which can
also activate main menu etc.
10
Response Block
For setting up response measurements, such as format, scale, calibration,
averaging of traces etc.
11
Adjust Block
Include adjustment knobs and navigation key, and moving among selected
1. LED Screen
2. ON/
Standby
3. Ground
Terminal
13. Soft Keys
12. Marker/ Analysis
11. Adjust Block
10. Response block
9. Entry Block
8. Stimulus Block
7. Trace/Channel
6. Utility Block
5. Test Ports
4. USB Port

Ready for Use
8
menus or changing numeric values.
12
Marker/
Analysis
Marker function for searching, data math and memory of measurement
traces; data analysis function for limit test,Bandwidth test, fixture
simulator etc.
13
Soft Keys
A group keys on the screen. any key on front panel can recall
corresponding soft key menu.
Ultimate damage bearing level of instrument port: +26dBm radio frequency power. Input
beyond this range might burn the analyzer.
2.4 Operating Interface
3656 Series Vector Network Analyzer is equipped with TFT 10.4 inch LED crystal display screen
and supports touch-screen function, which displays all measurement setup, status and results etc.
Operating interface after opening all tool bars are as the following picture:
Figure 2.2 3656 Series Vector Network Analyzer Operating Interface
Descriptions over screen display are as follows:
Table 2-3 Interface Display Descriptions
S/N
Name
Description
1
Time
Domain
Transform
Turn on or off time domain function and door function, which can switch
frequent domain data to time domain data for measurement and analysis.
2
Marker
Turn on or off marker function, which can enable 9 markers and one
reference marker simultaneously. You may set up activation value of
！
WARNING
1. Time Domain
Transform
2. Marker
3. Measurement
4. Menu
5. Sweep Control
6. Active Entry
7. Stimulus
8. Softkey
toolbar

Ready for Use
9
marker.
3
Measurement
You may create S parameter measurement trace and display in different
windows.
4
Menu Bar
Major menu of the analyzer process, including all functions of the
analyzer’s measurements. You may operate by mouse or touch screen.
5
Sweep
Control
Terminat, pause or carry on the sweep of current measurement trace.
6
Active Entry
Input values required of current operation.
7
Stimulus
Set up start frequence, stop frequence, and points of the actived trace.
8
Soft Key
Tool Bar
Every key on front panel has corresponding soft key menu and makes it
simpler to operate.
2.5 Rear Panel
This section describes rear panel of 3656 Series Vector Network Analyzer in details, as shown in
the following picture:
Figure 2-3 Rear Panel of 3656 Series Vector NetworkAnalyzer
Descriptions of keys on rear panel are as follows:
Table 2-4 Description of Rear Panel
S/N
Name
Description
1
USB Port
Used to connect keyboard, mouse or other USB devices.
2
LAN Internet Access
100/1000 BaseT Ethernet connecting port.
3
GPIB Port
In conformity with IEEE-488 standard and used for sending and
receiving GP-IB/SCPI commands through GPIB connector.
4
VGA Port
Used in connecting VGA monitor.
5
10MHz Ref Output
BNC female connector. the analyzer outputs a 10MHz sine wave
signal，which can be as the external reference signal of another device.
The device can be phase-locked to the reference signal of the analyzer.
Output frequency: 10MHz±10ppm, output level: 10dBm±4dB.
6
External Trigger Output
Analyzer outputs trigger signal with 5V TTL level after system is ready.
7
External Trigger Input
Analyzer triggers sweep via signal input by this connector. You may set
up level trigger and edge trigger in trigger menu. Requirements of input
signal: -0.5V≤ low level ≤0.8V, 5 V≥high level ≥2.0V.
8
10MHz Ref Input
BNC Female Connector. You may input 10MHz external reference
signal, the measurement signal of the analyzer is automatically phase-
1. USB Port
2. LAN Internet
Access
3. GPIB Port
4. VGA Port
5. 10MHz Ref Output
6. External Trigger
Output
7. External Trigger
Input
8. 10 MHz Ref Input
9. Power Cable Receptor
10. Power Switch

Ready for Use
10
locked to the external reference signal. Input frequency:
10MHz±10ppm, input level: -5dBm～+5dBm.
9
Power Cable Receptor
Connect the analyzer to the power source. It is recommended to use the
three-core power cable with a ground conductor equipped with the
instrument. It’s best to use the one of same type as that equipped with
the instrument, when replacing the power cable.
10
Power Switch
Keep the switch “On”during startup and operation ofAnalyzer.

Typical Applications
11
3. Typical Applications
With efficient and strong error correction capability, 3656 Series Vector Network Analyzer supports rapid
and precise measurement of amplitude, phase, and group delay characteristics of S parameters of DUT and
can be used in tests of filter, amplifier, and parts such as attenuator, connector, antenna, cable etc. You may
also select 75Ωtesting subassembly to perform performance measurements etc. over parts of cable TV.
Steps of basic measurements of 3656 Series Vector Network Analyzer are as follows:
1. Set up Testing Conditions
First preset the analyzer and then set up testing conditions such as “S Parameter”, “Format”, “Intermediate
Frequency Bandwidth”, “Measurement Frequency Range”, “Number of Measuring Points”, “Power Level”
etc. bandwidth.
2. Analyzer Calibration
First select calibration kit and then select calibration type to complete corresponding measurement
calibration and perform error correction over Analyzer.
3. Measurement of DUT
Connect DUT to port of Vector Network Analyzer. Normally, display scale by default cannot reach sound
display results. You may adjust to the most observation friendly testing status via automatic scale and
corresponding scale manually input.
4. Measurement Result Analysis and Output
Mark and analyze measurement results of functions such as cursor, limit line and time domain gate. You
may store measurement results into different formats such as recallable files or pictures on disk.
This Chapter describes some testing examples of DUT in common use with 3656 Series Vector Network
Analyzer. It describes tests over filters and amplifiers in details and other featured functions and setup of
3656 Series Vector Network Analyzer.
Support front panel keys and mouse operation
User interface of 3656 Series Vector Network Analyzer supports front panel of instrument and
mouse operation. The following detailed examples are mainly about operation of front panel
keys. Front panel keys operation corresponds to mouse selected menu operation.
Notice

Typical Applications
12
3.1 Filter Test
This section describes how to measure the characteristics of a 2GHz center frequency as an example, such
as insertion losses, out-of-band rejection, return loss, and etc.
3.1.1 Set up measurement Conditions
Press【Preset】on front panel to return the analyzer to the initial setup state, when it reaches
regulated pre-heating time. Default trace parameter is S11. The number of default sweep points is 201.
Default trace display scale is “10dB”and reference value is “0dB”.
Press 【Start】and 【Stop】on front panel to call up the following soft key menu as shown in the
following picture. Click [Start], press 【1】→【G/n】on the entry bar of the screen, and set the start
frequency 1 GHz; Click [Stop] ,press 【3】→【G/n】on the entry bar, and set the stop frequency 3 GHz.
Figure 3-1 Frequency Soft Key Menu
Press 【Sweep】key on front panel to call up soft key menu as shown in the following picture.
Press [Power]→[Power Level], press【10】→【/off】on the entry bar, and set power level 10dBm .