May
2005, Issue 178
Test Your
EQ
|
Answer
3—A
T1 signal uses alternate-mark-inverted (AMI) signaling,
which means that return-to-zero (RZ) pulses that are 0.5
bit periods wide represent ones in the datastream. Successive
pulses have opposite polarity in order to maintain a long-term
DC average of zero. The raw data rate is 1.544 Mbps, which
makes the bit period approximately 648 µs.
Contributor:
David Tweed
