Level compensated frequency selector

Claim 2

In an apparatus including means for selecting and converting a particular channel of a multichannel R.F. input signal to an output signal having a predetermined frequency, a signal level compensating apparatus comprising: attenuating means coupled to said converting means for selecting one of a plurality of discrete preset attenuation levels each of said levels being associated with a corresponding channel of said multichannel R.F. input signal and for attenuating said output signal in accordance with said selected preset attenuation level; and, means responsive to said attenuated output signal for indicating the signal level of each of said input channels.

Claim 3

An apparatus according to claim 1 wherein said attenuating means comprises: a plurality of switch means for selectively providing a plurality of preset electrical potentials, each associated with a corresponding one of said input channels; and means responsive to each of said electrical potentials for controlling the magnitude of said attenuation of said output signal.

Claim 4

An apparatus according to claim 2 wherein said means for selectively providing said plurality of electrical potentials comprises: a plurality of circuit means coupled to saiD means responsive to each of said electrical potentials; and means coupled to each of said circuit means for selectively coupling predetermined ones of said circuit means to a source of potential.

Claim 5

An apparatus according to claim 3 wherein said converting means further includes a plurality of channel selector switch means and wherein said selective coupling means in said potential providing means comprises switch means associated with each of said channels in said multichannel R.F. input signal, and further comprising: means for coupling each of said potential providing switch means to a corresponding one of said channel selector switch means whereby a switching of said channel selector switch means will effect a switching of said corresponding potential providing switch means in said attenuating means.

Claim 6

An apparatus according to claim 3 wherein each of said plurality of circuit means comprises a potentiometer, the wipers of each of which are coupled to said means responsive to each of said electrical potentials.

Claim 7

An apparatus according to claim 1 wherein said means responsive to said attenuated output signal is a field strength indicating apparatus.

Claim 8

A signal level compensated channel selector comprising: means for receiving a multichannel R.F. input signal including a voltage controlled oscillator; means controlling the frequency of said oscillator for selecting one channel of said multichannel R.F. input signal and for converting said selected channel to an output signal the magnitude of which is a function of said selected channel; means responsive to said channel selecting and converting means for selecting one of a plurality of discrete preset attenuation levels, each associated with a corresponding one of said input channels, and attenuating said output signal in accordance with said level; and means responsive to said attenuated output signal for indicating the signal level of each of said channels in said multichannel R.F. input signal.

Claim 9

A signal level compensated channel selector comprising: means for receiving a multichannel R.F. input signal including a voltage controlled oscillator; means controlling the frequency of said oscillator for selecting one channel of said multichannel R.F. input signal and for converting said selected channel to an output signal the magnitude of which is a function of said selected channel; means responsive to said channel selecting and converting means for selecting one of a plurality of discrete preset attenuation levels, each associated with a corresponding one of said input channels, and attenuating said output signal in accordance with said level; and means responsive to said attenuated output signal for indicating the signal level of each of said channels in said multichannel R.F. input signal.

Claim 10

A channel selector according to claim 7 wherein said channel selecting and converting means includes a first bank of circuit elements coupled to said oscillator for providing a first plurality of discrete preset electrical potential levels to select a desired one of said channels and convert said selected channel to said output signal and said attenuating means includes a second bank of circuit elements for providing a second plurality of electrical potential levels each associated with a corresponding one of said first plurality of electrical potential levels for each of said channels and further comprising: means for coupling said first and said second bank of circuit elements for providing simultaneously a selected one of said first plurality of potential levels and the associated one of said second plurality of potential levels.

Claim 11

A channel selector according to claim 8 wherein each of said first and said second bank of circuit elements comprises: a plurality of potentiometers; and switch means for selectively coupling a predetermined one of said potentiometers in each of said banks to a source of potential.

Claim 12

In an apparatus including means for selecting and converting a particular channel of a multichannel R.F. input signal to an output signal having a predetermined frequency, a signal level compensating apparatus, comprising: attenuating means coupled to said channel converting means for attenuating said output signal in dependence upon said selected channel, and including first circuit means for providing a plurality of discrete preset electrical potentials, each associated with a corresponding channel of said input signal, second circuit means responsive to said electrical potentials for controlling the magnitude of said attenuation of said output signal in accordance therewith, third circuit means responsive to the channel selecting and converting means for supplying the one of said electrical Potentials associated with said selected channel from said first circuit means to said second circuit means to attenuate said output signal in response thereto; means responsive to said attenuated output signal for indicating the signal level thereof.

Claim 13

In an apparatus including means for selecting and converting a particular channel of a multichannel R.F. input signal to an output signal having a predetermined frequency, a signal level compensating apparatus, comprising: attenuating means coupled to said channel converting means for attenuating said output signal in dependence upon said selected channel, and including first circuit means for providing a plurality of discrete preset electrical potentials, each associated with a corresponding channel of said input signal, second circuit means responsive to said electrical potentials for controlling the magnitude of said attenuation of said output signal in accordance therewith, third circuit means responsive to the channel selecting and converting means for supplying the one of said electrical Potentials associated with said selected channel from said first circuit means to said second circuit means to attenuate said output signal in response thereto; means responsive to said attenuated output signal for indicating the signal level thereof.