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