JGB-12LYAA1 JDS UNIPHASE, JGB-12LYAA1 Datasheet - Page 18

• Manufacturer Part Number: JGB-12LYAA1
• Manufacturer: JDS UNIPHASE

Specifications of JGB-12LYAA1

• Lead Free Status / RoHS Status: Not Compliant

JGB-12SYAA1
JGB-12LYAA1
Gigabit Ethernet GBIC
Notes for Long Wavelength Optical Characteristics
Page 18 of 30
1. Launched optical power is measured at the end of a two meter section of a 50/125 m fiber for the shortwave GBICs and a 9/125 m
2. Extinction Ratio is the ratio of the average optical power (in dB) in a logic level one to the average optical power in a logic level zero
3. RIN
4. Optical rise time is determined by measuring the 20% to 80% response of average maximum values using an oscilloscope and 4th
5. The minimum and maximum values of the average received power in dBm allow the input power range to maintain a BER < 10
6. The Rx_LOS has hysteresis to minimize “chatter” on the output line. In principle, hysteresis alone does not guarantee chatter-free
fiber for the longwave GBICs). The maximum and minimum of the allowed range of average transmitter power coupled into the fiber
are worst case values to account for manufacturing variances, drift due to temperature variations, and aging effects.
measured under fully modulated conditions with a pattern of five 1s followed by five 0s, in the presence of worst case reflections.
Eye opening is the portion of the bit time where the bit error rate (BER) is
teristics are specified in the form of a mask of the transmitter eye diagram. These characteristics include pulse overshoot, pulse
undershoot, and ringing, all of which should be controlled to prevent excessive degradation of the receiver sensitivity. When
assessing the transmit signal, it is important to consider not only the eye opening, but also the overshoot and undershoot limitations.
order Bessel Thompson filter having a 3 dB bandwidth of 0.75 times the nominal baud rate. The measurement is corrected to the
full bandwidth value. Optical fall times are measured using a 6 GHz photodetector followed by a 22 GHz sampling oscilloscope. No
corrections due to filtering or system bandwidth limitations are made on the measured value.
when the data is sampled in the center of the receiver eye. These values take into account power penalties caused by the use of a
laser transmitter with a worst-case combination of spectral width, extinction ratio, and pulse shape characteristics.
operation. These GBICs, however, present an Rx_LOS line without chatter, where chatter is defined as a transient response having
a voltage level of greater than 0.5 volts (in the case of going from the negate level to the assert level) and of any duration that can
be sensed by the host logic.
12
is the laser noise, integrated over a specified bandwidth, measured relative to average optical power with 12 dB return loss.
10
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. The general laser transmitter pulse shape charac-
GBIC.1250
03/06/02
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