connected to the dip case 16 and to ground 3 any additional connections from the dip transformer 41 to the other two conductors 11 and 12 shall also include a series capacitance similar to that shown at 40 the three power conductors continue through a typical plug system 13 and a corresponding socket in the case of the motor and are connected to the windings 26 27 and 28 of the motor 2 the high voltage present on conductor 15a is isolated from the dip by the capacitor 40 the purpose of the downhole instrument package dip is primarily to take the outputs of one or more parameter measuring sensors such as temperature and pressure sensors which are housed in the box 47 convert them to a high frequency f m signal which can be transmitted to the sip which contains corresponding filtering decoding equipment as will be explained later the principle problem of transmitting low voltage d c signals over long cables is that because of the varying resistance of the cable conductors and insulation leakage it is very difficult to transmit a true indication of the values of the parameters in this invention the signal has been converted to a high frequency signal which can be a frequency modulated f m signal that is the low frequency data signals from the sensors representing temperature and pressure will be used to modulate this high frequency carrier signal which is above 10 5 khz and typically in the order of.