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Summary of Contents for Ceyear 3680A
- Page 1 3680A/B Cable & Antenna Analyzer Quick Start Guide China Electronics Technology Instruments Co., Ltd...
- Page 2 Preface The information contained in WARNING this guide is subject to change Thank choosing without notice. 3680A/B Cable & Antenna explanation right of all the “WARNING” denotes a Analyzer developed content and the terms in this produced China hazard. It calls attention to a...
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Page 3: Table Of Contents
Quick Start Guide for 3680A/B Cable and Antenna Analyzer Contents Chapter 1 Manual Overview ................. 1 Chapter 2 Ready for Use ..................2 2.1 Pre-operation Preparation ................. 2 2.2 Startup and utilization ................4 2.3 Front Panel ....................4 2.4 Operating interface ..................7 2.5 Top Interface ..................... -
Page 4: Chapter 1 Manual Overview
It introduces the calibration of 3680A/B in detail, and describes operating steps for basic measurement formats of 3680A/B and gives a brief description on techniques used in the test, through test cases such as cable testing, antenna testing, etc. By reading this chapter, you can use 3680A/B to finish some typical DUT test by yourself. -
Page 5: Chapter 2 Ready For Use
2.1.1 Environmental Requirements To ensure the service life and validity and accuracy of 3680A/B, please conduct testing under the following conditions: 1. Temperature range: Storage temperature range: -40℃ ~ +70℃; operating temperature range: -10℃ ~ +50℃... - Page 6 3. Powered by built-in battery 3680A/B can be powered by rechargeable lithium-ion batteries. If left unused for a long time, the battery will self discharge, so it must first charge the battery before using it again. Refer to Section 2.6 for battery usage details.
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Page 7: Startup And Utilization
[XXX], Warning XXX is menu name. 2.3 Front Panel This Section provides a detailed introduction of the front panel of 3680A/B. Figure 2.1 is the front panel of 3680A/B. - Page 8 Quick Start Guide for 3680A/B Cable and Antenna Analyzer Figure 2.1 Front panel of 3680A/B Cable & Antenna Analyzer The features of common keys are described as below: 【Freq】: used for measurement parameter settings such as frequency parameter, signal standard, distance parameter and velocity factor etc.
- Page 9 Quick Start Guide for 3680A/B Cable and Antenna Analyzer 【↑】and【↓】: Represent up and down respectively and used to control step or select current options. 【←】backspace key: used to delete the last entered number or character. 【Cancel】: Used to cancel parameter setting and close the input tag.
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Page 10: Operating Interface
Quick Start Guide for 3680A/B Cable and Antenna Analyzer 2.4 Operating interface 3680A/B is provided with a 7-inch HB TFT true color LED with the function of touch screen and supports soft-key operations of applications through touch screen. The operating interface is as shown in Figure 2.2. -
Page 11: Battery
3680A/B is equipped with a rechargeable lithium-ion battery with a large capacity with operating time of up to more than 8 hours for 3680A and 4 hours for 3680B. In order to assure the service life, the battery shall be taken out of the battery compartment in transport and long-term storage. Buying stand-by batteries of the same model with the original one is recommended if long-time field test is performed. - Page 12 Quick Start Guide for 3680A/B Cable and Antenna Analyzer Mount/ Pull out the battery Pull down Open battery cover battery cover Push up battery cover Close battery cover Figure 2.4 Battery Mounting or Replacement In addition, for those dead batteries, charging time in OFF state is about 4 hours.
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Page 13: Chapter 3 Typical Application
Quick Start Guide for 3680A/B Cable and Antenna Analyzer Chapter 3 Typical Application 3680A/B offers many measurement formats, and this Chapter will make a detailed instruction on operation steps of several basic measurement formats by three test cases. 3.1 Calibration To ensure accuracy of test results, the instrument needs to be calibrated before test to eliminate the errors. - Page 14 Quick Start Guide for 3680A/B Cable and Antenna Analyzer Specific mechanical calibration procedure is as follows: Connect the open to the test port and select the [OPEN] menu. At this time, the screen will automatically prompt “[OPEN]Measuring……”. When the [Open] menu becomes into [OPEN], it indicates the completion of the open circuit calibration.
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Page 15: Cable Test
Figure 3.5 Connection method for Return Loss/VSWR Measurement 3680A/B mainly tests RF cable. Take the cable with length of 25m, radio frequency of 2.1GHz and VSWR of 1.05 as an example, this part makes a detailed instruction on test steps of return loss (Measurement steps of return loss and VSWR test are the same, therefore, it only takes return loss measurement as example here). - Page 16 Quick Start Guide for 3680A/B Cable and Antenna Analyzer Figure 3.6 Selection of Measurement Format 3. Press 【FREQ】 to enter the frequency menu; select [Start Freq] menu, then use the numeric keys, knob or arrow keys to input the start frequency value and select the corresponding unit menu to complete the input;...
- Page 17 Quick Start Guide for 3680A/B Cable and Antenna Analyzer press 【Marker】 to turn on marker function, so that you can check the return loss conditions of the cable at each frequency. Return loss or VSWR is the matching degree of DUT at each frequency point in the whole frequency band.
- Page 18 Quick Start Guide for 3680A/B Cable and Antenna Analyzer Open/Short Figure 3.9 Cable Loss Test Connection Diagram Cable loss curve of the measured cable can be obtained through above steps. The so-called average loss refers to average the measured extreme values of loss. Users can use 【Marker】 to find peak value and valley value of the loss curve, then average them, and finally obtain the average loss of the cable.
- Page 19 Fault Point Figure 3.10 DTF Measurement Connections 3680A/B provides two measurement formats including DTF return loss and DTF VSWR. As for their difference, we will not explain here again for it is similar to the difference between return loss and VSWR.
- Page 20 Quick Start Guide for 3680A/B Cable and Antenna Analyzer part in Section 3.5 of this Chapter. 8. According to Section 3.1 in this Chapter, calibrate port 1 of Analyzer; 9. Press 【Freq】->[Velo Factor] to set velocity factor of DUT, which is the transmission speed and light speed of electromagnetic wave in the cable, is between 0~1.
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Page 21: Antenna Test
Figure 3.12 Measurement on Length of Cable 3.3 Antenna Test 3680A/B can test the return loss/VSWR of general passive receiving antenna. This part will introduce the measurement process of passive antenna by taking terminal antenna TZD-P021Z05-195 as an example. Terminal antenna TZD-P021Z05-195 is kind of receiving antenna with frequency of 2,100MHz, whose standing wave is minimum at 2,100MHz in theory. -
Page 22: Universal Devices And Parts Test
3.4 Universal Devices and Parts Test Addition to cable and antenna test, 3680A/B can also be used for testing the attenuation, cable connectors, cable joints, etc. This part will measure the return loss of 10dB attenuation, as an example, with operations as follows: 1. -
Page 23: Test Skills
As there have given a detailed description to the test steps for several test formats, this part will make a brief introduction on some common skills used in the measurement process. 1. Amplitude: 3680A/B provides three ways for amplitude adjustment: First, through the top and bottom adjustment; Second, through automatic ratio adjustment; Third, through the adjustment on reference value, location and ratio. - Page 24 Figure 3.18 Return Loss Curve after Automatic Ratio Adjustment 2. Limit line: Users have their own eligibility criteria in batch test. In this regard, 3680A/B provides 【Limit】 function for the setting of limit line, making it easier to test products. Thus, when large quantities of products need to be tested, it only needs to replace DUT and observe limit line to judge whether the product is qualified or not.
- Page 25 Test curve in Figure 3.20 has exceeded the set limit line. Figure 3.20 Alarm for Limit Line When Overstepping the Boundary 4. Store/Recall: 3680A/B provides store/recall function, for saving and recalling the measurement state, trace and pictures to meet the requirements of users when they writing the subsequent report, checking...
- Page 26 5. Cable Model: It has given detailed steps for setting velocity factor and cable loss in DTF test. To make it easier to test and set parameters, 3680A/B offers a series of common cable models for user’s recall. Users can directly use [Cable Model] menu in the menu bar of 【FREQ】 to enter the interface for cable model selection.
- Page 27 The more the sweep points are, the longer the measured maximum distance will be. In terms of cable loss, nominal value of effective directionality of 3680A/B is equal to or more than 42dB. If the reflected signal energy is less than the effective directionality, the valid test result is not available.
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Page 28: Chapter 4 Ask For Help
4.1 Basic check If any problem occurs in the 3680A/B you are using. You can check them yourself in accordance with the following guidance. If the problem persists, please contact us. ... -
Page 29: Return-To Factory Repairing Method
4.3 Repair Method When your problems with 3680A/B appear difficult to solve, you can contact us by phone or fax. If you confirm that the instrument needs to be repaired, please follow the steps below to package the instrument: 1) Write a paper document describing the instrument failure and put it in a packing case with the Analyzer;... -
Page 30: Appendix I: Technical Indicators
Quick Start Guide for 3680A/B Cable and Antenna Analyzer Appendix I: Technical Indicators The technical indicators of 3680A/B have been strictly tested when leaving the factory. Users can also verify the testing in accordance with the technical indicators provided in this guide. The major technical indicators of 3680A/B are as shown in the table below. -
Page 31: Appendix Ii: Accessories / Options List
Quick Start Guide for 3680A/B Cable and Antenna Analyzer Appendix II: Accessories / Options List Table 2 Accessories / Options List of 3680A/B Cable & Antenna Analyzer Home Accessories/ Options No. Accessories/ Options 1 power cord 1 AC-DC adapter 1 lithium-ion battery... - Page 32 Quick Start Guide for 3680A/B Cable and Antenna Analyzer...