Tektronix DPO7OE2

The DPO7OE Series Optical probes can be used as an Optical Reference Receiver for high speed serial data signals (using selectable Bessel-Thomson ORR filters), or can be used as a conventional O/E converter for general wide-bandwidth optical signal acquisition. The DPO7OE Series is compatible with DPO/MSO70000 C/DX/SX models. Connected to TekConnect channels for up to 33 GHz electrical bandwidth. Connected to ATI channels, the DPO7OE1 provides up to 42 GHz electrical response; the DPO7OE2 provides up to 59 GHz electrical bandwidth response.

Features and benefits

• Accurate Optical Reference Receiver (ORR) filters for 25 GBd, 26 GBd, 28 GBd, and 53 GBd optical networking standards ensure highest measurement accuracy and correlation
• Versatile design delivers Bessel-Thompson ORR specified bandwidths or unfiltered response up to 59 GHz on multiple channels
• Broad wavelength with FC/PC or FC/APC connector options
• High sensitivity and low noise provide best SNR for high-speed signal analysis
• Enables deep analysis of PAM4 and PAM2 (NRZ) signaling, equalization and error detection/isolation
• Compatible with ATI and TekConnect® channels for maximum performance or channel density

Applications

• Datacenter Networking equipment design validation
• Research - Characterization of laser-based velocity measurement system (e.g. PDV, BLR) and other optical phenomena
• System debug of optical interfaces using a real time oscilloscope's unique debug features

Optical reference receiver performance

Achieving Optical Reference Receiver (ORR) response requires sufficient instrument bandwidth to ensure smooth frequency roll-off characteristics beyond the data rate. For design of Datacenter Networking equipment, an ORR with a fourth-order Bessel-Thomson (BT4) frequency response is generally used. For NRZ (PAM2), the reference receiver's −3 dB electrical bandwidth is set to a frequency of 75% of the optical symbol rate and its bandwidth limit guard bands are specified to a frequency of 150% of the optical symbol rate. Using these values for a 28 GBd optical signal yields the following frequency response requirements:

For PAM4 signals the BT4 filter is tuned lower. The electrical bandwidth is set to a frequency corresponding to 50% of the symbol rate. The ORR BT4 filters for the important symbol rates of PAM4 standards, such as 53.152 GBd and 26.5625 GBd, are also available in the DPO7OE Series.

The DPO7OE Series can be used in conjunction with 50 GHz and higher ATI channels on the DPO70000SX instruments, providing ample bandwidth for a smooth BT response for up to 28 GBd data. The DPO7OE2, used in conjunction with 70 GHz ATI channels on the DPO70000SX instrument, supports smooth BT response for use at 53 GBd PAM4 data. The graph below shows a typical frequency response of the DPO7OE1 on a DPO77002SX real-time oscilloscope.

Fourth order Bessel-Thompson frequency response of the DPO7OE1 Optical Probe and DPO70000SX ATI channel

The smooth, controlled system response with the DPO7OE Series and DPO70000SX oscilloscope is possible because the oscilloscope's system software calculates the BT4 filters using the S-parameters unique to the optical probe and the oscilloscope channel. Most real-time oscilloscopes today have a rather sharp roll-off (e.g. "brick wall") at or just above the rated channel bandwidth. This response limits the ability to replicate a true BT4 response, which has a much more gradual roll-off characteristic. Without a true BT4 response, the signal's eye opening will be reduced, adversely impacting the accuracy of the measurement.

Optical signal analysis

The DPO7OE Series optical probe enables deep analysis of PAM4-O and PAM2 (NRZ) signaling using Tektronix' industry leading DPOJET Jitter and Eye Analysis and PAM4 Analysis software.

DPOJET supports the traditional optical measurements. These measurements include extinction ratio, eye high, eye low, eye crossing, and optical modulation amplitude.

Industry-leading PAM4 signaling analysis

The PAM4-O software supports analysis of PAM4 optical signals with clock recovery, error detection, and IEEE and OIF-CEI standard specific measurements, e.g. TDECQ.

PAM4 Analysis Software with Eye Diagram and Example measurement Results

Versatile configurations

The versatile design of the DPO7OE Series optical probe is compatible with either a DPO70000SX oscilloscope's ATI channel or channels with the TekConnect interface. This versatility makes the DPO7OE Series optical probe suitable for use with all DPO70000SX, MSO/DPO70000DX, and MSO/DPO70000C series oscilloscopes.

Optical Reference Receiver with up to 59 GHz on a DPO70000SX oscilloscope'ATI channel

DPO70000SX models support up to 4 optical inputs with 33 GHz maximum bandwidth

DPO7OE1 is compatible with MSO/DPO70000DX models

Ordering information

Models

DPO7OE1

33 GHz bandwidth, single/multi-mode, 750 nm to 1650 nm, optical probe for MSO/DPO70000 Real Time Oscilloscopes

DPO7OE2

59 GHz bandwidth, single-mode 1200 nm to 1650 nm, optical probe for MSO/DPO70000 Real Time Oscilloscopes

Standard accessories

Hard case, Instruction manual, Certificate of Traceable Calibration, One year warranty, Optical fiber cleaning tool, ATI input support accessory

 

Recommended oscilloscope application software

PAM4-O

Optical Measurements for PAM4

DJA

DPOJET Jitter and Eye Diagram Analysis with Optical Measurements

DJAN

DPOJET Jitter and Eye Diagram Analysis with Vertical Noise Separation

SDLA

Serial Data Link Analysis

Recommended accessories

006-8327-xx

Optical connector cleaner

Options

Product options

Note: Select an optical input connector type from the following mandatory, mutually exclusive options.

FC/APC

FC/APC optical input connector (typically used in research applications)

FC/PC

FC/PC optical input connector (typically used in networking/data center network applications)

Service options

Opt. C3

Calibration Service 3 Years

Opt. C5

Calibration Service 5 Years

Opt. D3

Calibration Data Report 3 Years (with Opt. C3)

Opt. D5

Calibration Data Report 5 Years (with Opt. C5)

Opt. G3

Complete Care 3 Years (includes loaner, scheduled calibration, and more)

Opt. G5

Complete Care 5 Years (includes loaner, scheduled calibration, and more)

Opt. R3

Repair Service 3 Years (including warranty)

Opt. R5

Repair Service 5 Years (including warranty)

Probes and accessories are not covered by the oscilloscope warranty and service offerings.