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).
- Electrical bandwidth: 1 GHz in 50 Ω mode: ≥10 mV/div
- Maximum real-time sample rate: 4 GS/s
- Number of channels: 4