Equipment information
Telecom Analysis Systems Inc. TAS 4500 Other
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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.
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