Automatic frequency deviation control system for subcarrier oscillator

Claim 1

A FM/FM TELEMETERING SYSTEM COMPRISING: A TRANSMITTING PORTION AND A RECEIVING PORTION, SAID TRANSMITTING AND RECEIVING PORTIONS BEING COOPERATIVELY COUPLED; SAID TRANSMITTING PORTION COMPRISING: TRANSMITTING MEANS FOR TRANSMITTING AN RF SIGNAL TO SAID RECEIVING PORTION AND INCLUDING AN RF OSCILLATOR COUPLED TO A TRANSMITTER; A PLURALITY N OF SUBCARRIER CHANNELS, EACH OF SAID PLURALITY OF SUBCARRIER CHANNELS BEING COUPLED TO SAID RF OSCILLATOR AND INCLUDING CONDITION SENSOR MEAND, EMPHASIS FILTER MEANS AND SUBCARRIER OSCILLATOR MEANS, SAID EMPHASIS FILTER MEANS COUPLING SAID SENSOR MEANS TO SAID SUBCARRIER OSCILLATOR MEANS; EACH OF SAID SUBCARRIER OSCILLATOR MEANS HAVING A DIFFERENT CENTER FREQUENCY AND A BANDWIDTH WHICH IS A PREDETERMINED PERCENTAGE OF SAID CENTER FREQUENCY; EACH SENSOR MEANS BEING OPERATIVELY ADAPTED AND ARRANGED TO SENSE A CONDITION AND TO PRODUCE AN ELECTRICAL SIGNAL WHICH HAS A PERMISSIBLE FREQUENCY RANGE FROM ZERO TO A MAXIMUM SIGNAL FREQUENCY AND EACH OF SAID EMPHASIS FILTER MEANS HAVING AN ATTENUATION VS. FREQUENCY CHARACTERISTC SUCH THAT THE MAXIMUM ATTENUATION OCCURS AT A FREQUENCY WHICH IS ONE-HALF OF SAID MAXIMUM SIGNAL FREQUENCY, SAID ATTENUATION PROGRESSIVELY DECREASING AT FREQUENCIES INCREASINGLY REMOTE FROM THE FREQUENCY OF MAXIMUM ATTENUATION; SAID RECEIVING PORTION COMPRISING: RECEIVING MEANS FOR RECEIVING SAID RF SIGNAL FROM SAID TRANSMITTING MEANS AND INCLUDING AN RF DETECTOR COUPLED TO A RECEIVER; A PLURALITY N OF RECEIVER CHANNELS, EACH OF SAID RECIEVER CHANNELS BEING COUPLED TO SAID RF DETECTOR AND INCLUDING RECORDING MEANS, DEEMPHASIS FILTER MEANS AND BAND PASS FILTER AND DISCRIMINATOR MEANS; EACH OF SAID DE-EMPHASIS FILTER MEANS HAVING AN ATTENUATION VS. FREQUENCY CHARACTERISTIC WHICH IS THE INVERSE OF THE ATTENUATION VS. FREQUENCY CHARACTERISTIC OF DIFFERENT ONES OF SAID EMPHASIS FILTER MEANS.