| 摘要 |
PURPOSE:To use a coaxial cable having an optional characteristic impedance and an already laid cable under the same condition after a minor modification, by installing an exchangeable terminal resistance to the primary side of the pulse transformer. CONSTITUTION:In case when the kind of the coaxial cable to be used is changed, to accomodate a transmitting-receiving circuit itself by making only a minor modification without changing the basic constitution of the circuit, a terminal resistance 12 having a resistance value equal to the characteristic impedance of a coaxial cable 3 is installed to the receiving side of the cable 3. That is, to say, the terminal resistance 12 is inserted into the primary side of a pulse transformer 4. In figure 10 and 11 are resistances and 8 is a transmitting circuit. |
