• Optical to Electrical converter for direct conversion of signals into an Infiniium real-time oscilloscope
• Bandwidth, Typical (electrical -3 dBe): 60 GHz (with Brickwall filter)
• Wavelength range: 1250 to 1600 nm
• Input connector: FC/PC to 9/125 µm fiber, compatible with single-mode fiber
• Rise time (10 to 90%), typical: 7.3 psec (with Brickwall filter)

The Keysight N7004A and N7005A optical-to-electrical converter is a high-sensitivity DC-coupled photodetector module designed for direct optical-to-electrical conversion of optical telecommunication or data communication signals into an Infiniium real-time oscilloscope. Each N7004A or N7005A adapter contains a measured S-parameter for an optimized correction filter, and this frequency response data is used to flatten the frequency response for a more accurate measurement.

The Keysight N7004A and N7005A have a high-sensitivity photodetector module with an FC/PC input connector to receive optical telecom or datacom signals from an optical source/transmitter through a fiber optic patch cable. The N7004A supports transmission through a single-mode as well as a multimode fiber. The N7005A supports transmission through a single-mode fiber.

The N7004A is the first fully-integrated optical-to-electrical converter solution for Infiniium real-time oscilloscopes. A full suite of optical measurement software is built into the Infiniium baseline software v 05.70 and is offered at no additional cost. The N7004A comes in a compact form factor that is plugged directly into the AutoProbe II probe interface of the Infiniium oscilloscope.

The adapter provides electrical bandwidth ranging from DC to 33 GHz. When used with an Infiniium V-Series, Z-Series, or UXR 33 GHz oscilloscope, the N7004A allows users to view optical streams at speeds up to 28 Gbps, making this the ideal solution for characterizing or troubleshooting high-speed optical signals in system-level testing. The N7004A with an Infiniium real-time oscilloscope is the ideal solution for users who want to see the unfiltered response of optical transmissions as well.

The input is a 50 µm/125 µm fiber that can be used with a 9 µm single-mode fiber or a 50 µm multimode fiber at wavelengths from 750 to 1650 nm and also has an FC/PC adaptor. The reference receiver measurement is made with a built-in 4th order Bessel Thomson software filter that allows the waveform to be viewed similarly to what an optical receiver in an actual communication system would display. The 4th order Bessel Thomson filter bandwidth is limited to 2/3 of the Brickwall bandwidth of the oscilloscope. For a 33 GHz oscilloscope with the Bessel Thomson filter on, this yields a 22 GHz Bessel Thomson filter, which covers 28 Gbps x 0.75 = 21 GHz

The Keysight N7005A is a 60 GHz (-3 dB, Brickwall) O/E converter compatible with the Keysight UXR oscilloscope with a 1.85 mm or 1 mm input. The frequency response of a DSP corrected N7005A is either flat to up to 60 GHz Brickwall response or follows a 4th order Bessel Thomson response until it hits the Brickwall at 70 GHz. The N7005A used in conjunction with the 70 GHz Infiniium UXR oscilloscope supports a 4th order Bessel Thomson response to view optical streams at speeds up to 56 Gbaud PAM4, making this the ideal solution for characterizing or troubleshooting high-speed optical signals at the system level testing and debugging.

Infiniium UXR baseline software v 10.25 or higher covers basic optical measurement features and dark calibration. The FlexRT measurement software installed on Infiniium UXR oscilloscope supports deep analysis of PAM4 signaling measurement capabilities such as TDECQ.

Optical measurements in watts, extinction ratio with dark calibration, eye mask testing (including the ability to load DCA masks with margin and user-defined mask support), power of 1 and 0, optical modulation amplitude, average power, and remote command support for all new features.

• Keysight N7004A - Infiniium UXR, V, 90000X, Z series, and discontinued 90000 Q series
• Keysight N7005A - Infiniium UXR with 40 GHz or higher