pe-68531g Pulse Specialty Components, pe-68531g Datasheet - Page 5

• Manufacturer Part Number: pe-68531g
• Description: Pe-6853xg Fastpulse High Speed Transceivers
• Manufacturer: Pulse Specialty Components

The following eye pattern measurements show the operation
of the adaptive equalizer and indicate the jitter performance of
the transceivers. All jitter measurements shown are peak values
resulting from combination of Transmit, Receive and
cable contributions. Figure A shows the MLT3 transmit output
Notes:
The PE-68531G/68537G MLT-3 transmit eye pattern is optimized for
minimum overshoot (< 3%) and a 3.5 ns rise time. It has < 1 ns transmit
jitter and as a result of its fast rise time, the receive eye pattern has
of jitter at 100 meters. Similarly, the PE-68532G/38G NRZ transmit eye
pattern has a 3 ns rise time, < 5% overshoot and less than 1 ns of transmit
jitter. Due to its relatively fast rise time and low transmit jitter, the data
dependent jitter from the channel is
FASTPULSE HIGH SPEED
LAN TRANSCEIVERS
Performance
U.S.A: TEL [phone]
MLT3 Transmit Output (TX±)
NRZ Transmit Output (TX±)
A
D
0 Meter UTP-5 Cable
0 Meter UTP-5 Cable
500mV/DIV, 2ns/DIV
200mV/DIV, 2ns/DIV
EUROPE: TEL [phone]
<
1.6 ns at the receiver output as
TP-FDDI/100Base-TX (PE-68531G/37G)
ATM-155 (PE-68532G/38G)
E
B
Receiver Input (RX±)
Receiver Input (RX±)
100 Meter UTP-5 Cable
100 Meter UTP-5 Cable
200mV/DIV, 2ns/DIV
100mV/DIV, 2ns/DIV
<
2 ns
5
waveform for 0 m cable. Figure B shows the waveform at receiver
input after massive attenuation and phase distortion effects of
100m UTP-5. Figure C shows the recovered NRZI data for the
same signal. The same measurements are repeated in Figures D,
E, and F for ATM 155 Mbps NRZ signal.
shown. There is a trade-off design choice: A faster rise time will minimize
jitter and produce a low bit error rate (BER). In contrast, a fast rise time,
while reducing jitter, can produce excessive overshoot and EMI emissions
when the signal encounters impedance mismatches in the cable or punch
down blocks. The transceivers have been optimized and tested to provide
optimum balance between low BER and minimum emissions.
ASIA: TEL [phone]
NRZI Receiver Output (RD±)
NRZI Receiver Output (RD±)
F
C
WEB: http://www.pulseeng.com
100 Meter UTP-5 Cable
100 Meter UTP-5 Cable
200mV/DIV, 2ns/DIV
200mV/DIV, 2ns/DIV
H309.A (7/96)