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| Number | Title | Issue Date |
| 4118665 | Time domain phase measuring apparatus The phase and/or period stability of a device being tested is determined by connecting the device in one orthogonal arm of a phase detector having a mixer. In the other arm is an adjustable, variable phase shift device, such as a line stretcher. The outpu... | 10/03/1978 |
| 4048568 | Wide operating frequency range superheterodyne FM noise analyzer It is desirable to be able to measure the FM noise spectra of signals whose arrier power is less than the minimum power level at which a direct non-amplified analyzer can operate satisfactorily. Generally a carrier less than approximately + 2 dbm would req... | 09/13/1977 |
| 4034285 | Superheterodyne noise measuring discriminators A superheterodyne noise measuring discriminator uses an optimum length trmission line which permits near carrier frequency modulation to be measured on a carrier frequency in a broad range from approximately two megahertz to two gigahertz with one set of... | 07/05/1977 |
| 4032716 | Measurement of noise in a communication channel A measure of the noise performance of an FDM system can be made by making measurements when the system is carrying traffic. The technique consists of creating a quiet channel in the system, and measuring the noise level in this quiet channel. The tester o... | 06/28/1977 |
| 4002969 | Optimum length transmission line discriminator with low noise detector Measurement apparatus using an optimum length transmission line discriminr is disclosed which allows near carrier frequency modulation to be measured in the very high and ultra high frequency regions without the use of a microwave type cavity resonator o... | 01/11/1977 |
| 4002971 | Wide operating frequency range transmission line discriminator A wide operating frequency range transmission line discriminator uses an imum length transmission line which permits near carrier frequency modulation to be measured on a carrier frequency in a broad range from approximately two megahertz to one gigahert... | 01/11/1977 |
| 4002970 | Optimum threshold transmission line discriminator An optimum length transmission line discriminator circuit is disclosed wh provides for measurement of near carrier frequency modulation in the microwave region. An optimum length of transmission line within the discriminator is instrumental in providing ... | 01/11/1977 |
| 3970795 | Measurement of noise in a communication channel TNR (Traffic Noise Ratio) is defined as the ratio of the portion of the noise representing a multi-channel signal that occurs in a narrow bandwidth (including inherent, and intermodulation) to the noise in the same bandwidth, in the absence of a traffic s... | 07/20/1976 |
