Agilent / HP 420B
Crystal Detector
Description
This ultra high speed laser transmitter is designed to be a source of high quality digital and analog fiber-coupled optical signals.
In the digital mode, the optical output waveform conforms to the eye mask requirements of BellCore GR-253
Key Points
DC-Coupled Digital Input.
DC-Coupled Digital Input: -4.5 to 0.0V maximum without damage.
Bit Rate: 0 to 2500Mb/s minimum; 3000Mb/s typical.
Pulse Width, Minimum: 0.4ns maximum.
Logic Levels (10K, 10KH, 100K; Si or GaAs ASIC): Any standard ECL: high = -900mV; low = -1700mV; threshold = 1.3 ±0.2V (adjustable).
Input Termination: 50 ohms to -2.0V DC.
Specifications
Transmission up to 2.5Gb/s.
SONET /SDH compliant to OC-48/STM-16,
Very high quality optical output eye.
Extremely low jitter.
Low cost.
Analog and digital operating modes.
AC-Coupled Digital Input.
AC-Coupled Digital Input: 2.0 Vpp maximum.
Bit Rate: 50 to 2500 Mb/s minimum; 3000 Mb/s typical.
Pulse Pattern: 40 to 60% ones density.
Amplitude (for fully limited optical output): 0.70 to 1.5 Vpp minimum.
Impedance (AC-coupled through 0.1 uF): 50 ohm.