Abstract: A passive, highly efficient, low noise adapter device includes a balun and noise reduction circuitry uniquely configured to converting an unbalanced signal line on a 50 ohm signal line to a balanced signal on a 100 ohm transmission line or vice versa. The device facilitates the use of commercially available and accepted test equipment for accurate transmission measurements on balanced twisted pairs of cables and connectors. A typical utilization includes an adapter device connected between the 100 ohm twisted pair cable and suitable test equipment such as a network analyzer and/or a signal generator for determining losses in the telephone wire and connectors.

Abstract: A POTS splitter of the present invention generally include a telephone line interface, a data receiver interface that is connected to the telephone line interface, and a low pass filter that is connected to the telephone line interface. The low pass filter operates to pass only those frequencies that are lower than 4 Khz. And, the entire configuration of a single line POTS splitter is maintainable upon a circuit board that is no greater than 2.0 inches by 1.5 inches, with a maximum depth of 0.630 inches. The POTS splitter is operational in the temperature range of −40° to +70° C.

Abstract: A passive, highly efficient, low noise adapter device includes a balun and noise reduction circuitry uniquely configured to converting an unbalanced signal line on a 50 ohm signal line to a balanced signal on a 100 ohm transmission line or vice versa. The device facilitates the use of commercially available and accepted test equipment for accurate transmission measurements on balanced twisted pairs of cables and connectors. A typical utilizational includes an adapter device connected between the 100 ohm twisted pair cable and suitable test equipment such as a network analyzer and/or a signal generator for determining losses in the telephone wire and connectors.