APPENDIX B: EPIM CABLE REQUIREMENTS
Insertion Loss
The maximum insertion loss allowed for a
Impedance
Cabletron Systems
Shielded twisted pair cables, such as IBM Type 1 cable, can also be used. You should remember that the impedance of IBM Type 1 cable is typically 150 ohms. This increases the signal reflection caused by the cable, but since the cable is shielded, this signal reflection has little effect on the received signal’s quality due to the lack of crosstalk between the shielded cable pairs.
Jitter
Intersymbol interference and reflections can cause jitter in the bit cell timing, resulting in data errors. A
Delay
The maximum propagation delay of a
Crosstalk
Crosstalk is caused by signal coupling between the different cable pairs contained within a
Noise
Noise can be caused by either crosstalk or externally induced impulses. Impulse noise may cause data errors if the impulses occur at very specific times during data transmission. Generally, the user need not be concerned about noise. If
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