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Options and Accessories
Communication Signal Analyzer Package Applications
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Features
- Advanced Triggering, Including Triggering for AMI, CMI and NRZ Communication Signals
- Automatic Measurements with Measurement Statistics Including Extinction Ratio and Average Optical Power
- Waveform Histograms on DPO and Normal Waveform Acquisitions
- Custom Mask Generation On-board
- Autoset Signals to Standard Masks
- SONET/SDH and Fibre Channel Optical Reference Receivers
- Internal Standard Communication Signal Masks Provided for Compliance Testing from Over 50 Communication Standards:
- SONET/SDH (OC1/STM0, OC3/STM1, OC12/STM4)
- ITU-T (64 Kb/s, E1, E2, E3, E4, E5, STM1E)
- ANSI T1.102 (DS1, DS1A, DS1C, DS2, DS3, DS4NA, STS-1, STS-3)
- Fibre Channel (FC133, FC266, FC531, FC1063), electrical and optical
- FDDI
- SMPTE (143, 270, 360 and 1485 Mb/s)
- Ethernet (10, 100 and 1000 Mb/s)
Applications
- Debugging Communications Designs
- Mask Testing Per Comm/Video Standards
- Optical Eye Pattern Testing
The Tektronix TDS Communication Signal Analyzer package gives you the most comprehensive oscilloscope solutions for connecting to, capturing and characterizing optical and electrical signals in high-speed communication designs. Based on the TDS 500D/700D family of Digital Phosphor Oscilloscopes (DPOs), the Communication Signal Analyzer options and measurement accessories tailor the oscilloscopes for engineers debugging, characterizing and verifying the compliance of communication systems to international standards.
These communications options complement the Tektronix 11801C Digital Sampling Oscilloscope and the CSA 803C Communication Signal Analyzer, which provide bandwidths up to 50 GHz and measurement features tailored for optical component manufacturing and research and development applications.
Connecting to the Signal
Whether the signals are electrical (differential or single-ended) or optical, connecting the design to the measurement system is no easy matter. A wide selection of complementary measurement accessories, optimized for use with the TDS oscilloscopes, are available to make probing convenient and reliable, while maintaining high accuracy.
High-bandwidth Differential Probing allows measurements of high-speed differential signals while maintaining high common-mode rejection, as well as examination of circuit anomalies such as ground bounce and crosstalk. For example, the P6247 Differential Probes, with 1 GHz bandwidth, can be used to accurately measure differential electrical Fibre Channel and Ethernet signals. The high impedance minimizes circuit loading and the compact head geometry and assorted tip accessories allow secure connection to surface-mount and fine-pitch devices.
Electrical Communication Adapters such as the AFTDS ease connection to differential communication signals, such as DS1, DS2 and E1, by terminating the signal in 100 Ohm, 110 Ohm or 120 Ohm and adapting various connector styles (bantam, Siemens and RJ-11) to the oscilloscope's 50 Ohm BNC environment.
The AMT75 75 Ohm Adapter simplifies connection of video and communication signals such as DS3 and E3 to the oscilloscope. This adapter supplies a precise termination to signals up to 1 GHz.
Optical-to-electrical Converters allow convenient analysis of optical transmission signals. The P6701B can be used for Fibre Channel signals and the P6703B can be used for SONET/SDH signals. They provide high gain (1 V/mW) for signals up to 1 GHz and as large as 1 mW (0 dBm). The P6723 optical logic probe converts SONET/SDH signals into PECL digital signals suitable for use as triggers.
Capturing the Signal
High Bandwidth and Sample Rates, up to 2 GHz and 1 GS/s per channel, enable the user to capture the signal with high fidelity. Channels can be transparently combined to achieve higher sample rates, up to 4 GS/s.
Digital Phosphor Oscilloscopes capture, store, display and analyze, in real-time, three dimensions of signal information: amplitude, time and distribution of amplitude over time. The benefit of this new third dimension of information is an interpretation of the signal dynamics, including instantaneous changes and the frequency of occurrence displayed in the form of quantitative intensity information.
In addition to standard Advanced Trigger modes such as edge, pulse-width, logic and optional video trigger, these oscilloscopes have trigger modes tailored for communication design and debug. The optional Comm trigger addresses the need to acquire a wide variety of Alternate-Mark Inversion (AMI), Code-Mark Inversion (CMI) and Non-Return to Zero (NRZ) communication signals. These trigger modes may be selected manually during routine troubleshooting, but are automatically selected when mask testing is enabled.
AMI mode triggers on standard AMI signals (including DS1, DS3, E1, E2, E3 and STS-1). "Isolated ones" triggering is available on ANSI T1.102 AMI signals (including DS1 and DS3). CMI triggering isolates positive or negative one pulses and zero pulses in standard CMI signals (including STS-3, STM1E, DS4 and E4). NRZ trigger selects rising or falling edges, or any of eight 3-Bit serial patterns in NRZ signals (including SONET/SDH, Fibre Channel, FDDI, 143, 270, 360 and 1485 Mb/s serial video signals). The serial trigger mode allows identification of data-dependent anomalies in eye diagrams.
Long streams of serial data, up to 4 ms at full resolution, can be captured with optional long record length (up to 8 M points).
