Equipment information

Telecom Analysis Systems Inc. TAS 4500 Other
Manufacturer:
Model:
TAS 4500
Date:
1997
Category:
Group:
Description:
RF Channel Emulator

Information

The TAS 4500 FLEX RF Channel Emulator provides a convenient, thorough approach for testing wireless communications equipment by emulating the delay, fast and slow fading, and path loss characteristics of RF mobile communication channels. The 4500 FLEX allows thorough testing in a laboratory setting and drastically reduces the time required for product tests. The 4500 FLEX can be used to test a wide range of wireless voice and data communication equipment, including cellular telephones, cellular modems, personal communication terminals, wireless LANs, pagers, wireless network equipment, and much more. TAS 4500 FLEX provides advanced signal processing features to address a wide range of wireless communications technologies. The 4500 FLEX deli vers these features in a modular format, so your test system can evolve to meet your testing needs for years to come. The TAS 4500 FLEX has the following features: * Plug~Xn RF Front End Modules « Plug-In Local Oscillator Modules ® Plug-In, Wide Bandwidth Signal Processing Modules « Plug-In System Software PCMCIA Card A single TAS 4500 emulates two independent wide bandwidth RF channels, each with up to six transmission paths, see Figure 1-1. Delay, path loss, Rayleigh fading, and log-normal fading characteristics can be programmed for each path. Two six-path channels can be combined to make one 12-path channel, and two TAS 4500s can be combined and synchronized for multi-channel applications. Product Highlights • Wideband channel emulation capability meets or exceeds requirements of most wireless communications standards, including AMPS, IS-95 (CDMA), IS-54 (TDMA), GSM, CT2, TETRA, DCS-1800 and JDC • Emulates important radio channel characteristics, including Rayleigh fading, Rician fading, Suzuki fading, Nakagami fading, log-normal shadowing, delay spread/multi-path distortion, and path loss. See feature summary in Table 1-1. • TAS 4500's modular architecture lets your test system capabilities grow as your testing requirements grow. The modular 4500 FLEX architecture lets you select the number of RF channels and frequency synthesizers required to fit both existing and future testing applications. • The FLEX-IF™ allows you to select the IF bandwidth that is best for your application. Bandwidths of 6 MHz, 15 MHz, and 26 MHz are available to meet all your testing needs. • The FLEX-RF™ front end offers a host of high-performance features, including excellent rejection of the local Oscillator signal and a built-in RF attenuator. These features greatly enhance dynamic range and improve testing performance at low RF receive levels. • The FLEX-LO™ modules completely address the testing needs of both cordless phone, paging, cellular and PCS applications, eliminating the need for external signal generators. • Built-in digital signal processors and user Interface provide generation and control of fading signals in real time: no external PC required, no long signal processing delays, • Advanced Fading Features such as selectable fading method, fading repetition rate and fading power spectrum allow comprehensive testing using multiple fading models. « The Dynamic Parameter Emulation with Power Delay Profile feature allows the user an advanced method to enter and play back data emulating dynamic channel models. • Fine delay resolution makes TAS 4500 suitable for testing mobile, wireless LAN, and PBX applications. • Built-in configurations for industry-standard test procedures, • GPIB and RS-232 control ports make it easy to include TAS 4500 in automatic test systems. • Field-upgradeable PCMCIA System Software Card allows quick and easy access to the latest firmware revisions and features. • Flexible architecture provides easy configuration of test setups for 2, 4, or 8 branch diversity receivers.

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User Manual
Manual Type:
User Manual
Pages:
240
Size:
9.22 Mbytes (9666120 Bytes)
Language:
english
Revision:
4.3
Manual-ID:
2700-4808
Date:
1997 07 01
Quality:
Scanned document, all readable.
Upload date:
2017 02 05
MD5:
6cf011506d1a179aadc2c8c5083c0626
Downloads:
454

Information

About this manual This manual contains service and reference information for the following ThinkPad® products. ThinkPad Edge E420 Machine Type (MT) 1141, and 1167 ThinkPad Edge E425 Machine Type (MT) 1198 Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 “Safety information” on page 1 and Chapter 2 “Important service information” on page 25. Contents About this manual ... iii Chapter 1. Safety information ... 1 General safety ... 1 Electrical safety ... 2 Safety inspection guide ... 3 Handling devices that are sensitive to electrostatic discharge ... 3 Grounding requirements ... 4 Safety notices (multilingual translations) ... 4 Laser compliance statement (multilingual translations) ... 17 Chapter 2. Important service information ... 25 Strategy for replacing FRUs ... 26 Important notice for replacing a system board ... 26 How to use error message ... 26 Strategy for replacing FRUs for CTO, CMV, and GAV ... 26 Product definition ... 26 FRU identification for CTO, CMV, and GAV products ... 27 Chapter 3. General checkout ... 29 What to do first ... 29 Checkout guide ... 30 System supporting the Lenovo ThinkVantage Toolbox program and the PC-Doctor for DOS diagnostics program ... 30 System supporting the Lenovo diagnostics programs ... 34 Power system checkout ... 36 Checking the ac power adapter ... 36 Checking operational charging ... 37 Checking the battery pack ... 37 Checking the backup battery ... 38 Chapter 4. Related service information ... 39 Restoring the factory contents by using Recovery Disc Set ... 39 Passwords ... 40 Power-on password ... 40 Hard-disk password ... 40 Supervisor password ... 41 Power management ... 42 Screen blank mode ... 42 Sleep mode ... 42 Hibernation mode ... 42 Symptom-to-FRU index ... 43 Numeric error codes ... 44 Error messages ... 44 No-beep symptoms ... 44 LCD-related symptoms ... 45 Intermittent problems ... 45 Undetermined problems ... 45 Chapter 5. Status indicators ... 47 Chapter 6. Special keys ... 49 Chapter 7. FRU replacement notices ... 51 Screw notices ... 51 Retaining serial numbers ... 52 Restoring the serial number of the system unit ... 52 Retaining the UUID ... 53 Chapter 8. Removing and replacing a FRU ... 55 Before servicing ThinkPad Edge E420 models . . 55 1010 Battery pack ... 56 1020 ExpressCard blank bezel ... 57 1030 Bottom slot cover ... 58 1040 Optical drive or travel cover ... 59 1050 Memory modules ... 60 1060 Hard disk drive assembly ... 60 1070 PCI Express Mini Card for wireless LAN . . 62 1080 PCI Express Mini Card for wireless WAN . . 63 1080 mSATA solid state drive ... 64 1090 Backup battery ... 66 1110 Keyboard ... 66 1120 Top case assembly ... 68 1130 Bluetooth daughter card ... 71 1140 Express sub card ... 72 1150 Speaker assembly ... 73 1160 System board assembly and fan assembly . 74 1170 CPU ... 80 1180 DC-in sub card and base cover assembly . . 81 1190 LCD unit ... 84 2010 LCD bezel assembly ... 86 2020 Integrated camera ... 87 2030 LCD panel, LCD cable, LCD rear cover assembly, and hinges ... 88 2040 Wireless LAN antenna assembly, wireless WAN antenna assembly, and LCD rear cover assembly ... 90 Chapter 9. Locations ... 93 Front view ... 93 Rear view ... 94 Bottom view ... 94 Chapter 10. Parts list ... 95 Overall ... 96 LCD FRUs ... 105 Keyboard ... 108 Miscellaneous parts ... 109 ac power adapters ... 109 Power cords ... 110 Recovery discs ... 111 Windows 7 Home Basic (32 bit) DVDs ... 112 Windows 7 Home Basic (64 bit) DVDs ... 112 Windows 7 Home Premium (32 bit) DVDs . . 113 Windows 7 Home Premium (64 bit) DVDs . . 113 Windows 7 Professional (32 bit) DVDs ... 114 Windows 7 Professional (64 bit) DVDs ... 115 Common service tools ... 116 Appendix A. Notices ... 117 Electronic emissions notices ... 118 Trademarks ... 118

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