Home > Term: polarential telegraph system
polarential telegraph system
A direct-current telegraph system employing polar transmission in one direction and a form of differential duplex transmission in the other. Note: Two types of polarential systems, known as types A and B, are in use. In half-duplex operation of a type A polarential system, the direct-current balance is independent of line resistance. In half-duplex operation of a type B polarential system, the direct current is substantially independent of the line leakage. Type A is better for cable loops where leakage is negligible but resistance varies with temperature. Type B is better for open wire where variable line leakage is frequent.
- Μέρος του λόγου: noun
- Κλάδος/Τομέας: Τηλεπικοινωνίες
- Category: General telecom
- Company: ATIS
0
Δημιουργός
- KeithC3
- 100% positive feedback