Linear InGaAs Optical Receiver Lab Buddy with Automatic Gain Control up to 56 Gbaud

Sept. 22, 2023

The DSC-R421 is a linear PIN + transimpedance amplifier that is primarily designed for 4-level Pulse Amplitude Modulation (PAM 4) and NRZ-ASK (PAM 2) modulation formats up to 56 Gbaud symbol rate in 1310 nm and 1550 nm single-mode systems. The R421 offers a variety of user-adjustable characteristics such as mode of operation (AGC or manual gain control), RF gain, output amplitude, and bandwidth.

The DSC-R421 is available in Discovery’s computer-controlled Lab Buddy instrument, where several critical parameters can be controlled and monitored using Standard Commands for Programmable Instruments (SCPI) compatible commands via standard RS232C-over-USB interface. The DC photocurrent is monitored over nanoampere to milliampere range and is continuously shown in Lab Buddy’s digital display.

Salient Features:

  • Two modes of operation: AGC or manual gain control
  • Differential Conversion gain up to 3000 V/W
  • High Responsivity at 1310 nm & 1550 nm
  • Maximum differential RF output > 500 mVpp
  • Low optical PDL (0.05 dB typical)


  • Ideal Test & Measurement Optical Front-End
  • Ethernet: 400GbE, 800GbE
  • Infiniband: EDR, HDR, NDR
  • Fiber Channel: 32GFC, 64GFC, 128GFC
  • RF-over-fiber link

Learn More

Request More Information

By clicking above, I acknowledge and agree to Endeavor Business Media’s Terms of Service and to Endeavor Business Media's use of my contact information to communicate with me about offerings by Endeavor, its brands, affiliates and/or third-party partners, consistent with Endeavor's Privacy Policy. In addition, I understand that my personal information will be shared with any sponsor(s) of the resource, so they can contact me directly about their products or services. Please refer to the privacy policies of such sponsor(s) for more details on how your information will be used by them. You may unsubscribe at any time.