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Hewlett packard hp 420B crystal detector
Hewlett Packard HP 420B Crystal Detector
The 420B is a ultra high speed transmitter 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.
* Transmission up to 2.5Gb/s
* SONET/SDH compliant to OC-48/STM-16
* Very high quality optical output eye
* Analog and digital operating modes
* 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
* Impedence (AC-coupled through 0.1 uF): 50 Ohm
* 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 -2.0VDC
