Signal analysis instrument, and a module for a signal analysis instrument
First Claim
1. A signal analysis instrument, comprising:
- a computer;
a phase shift mechanism comprising;
an input for receiving a first high frequency signal;
a phase shifter arranged to act on said first high frequency signal to produce a phase-shifted first high frequency signal;
a phase shift controller arranged to control operation of the phase shifter in response to instructions from said computer;
a receiver mechanism, comprising;
a mixer responsive to the phase-shifted first high frequency signal and to a second high frequency signal to produce a mixer output signal therefrom;
a first signal conditioning circuit responsive to the mixer output signal to produce a receiver output signal;
a data acquisition mechanism responsive to the receiver output signal, the computer being connected to the data acquisition mechanism to receive data therefrom;
said computer arranged to control said phase shifter and to analyse data from said data acquisition mechanism to determine a position of said phase shifter corresponding to said mixer being phase-sensitive, and to determine a conversion ratio of said receiver mechanism.
2 Assignments
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Accused Products
Abstract
A signal analysis instrument (10) and a receiver. The signal analysis instrument (10) comprises a computer (12), a phase shift mechanism, a receiver mechanism and data acquisition device. The phase shift mechanism comprises an input (100) for receiving a first high frequency signal; a phase shifter (114) arranged to act on the first high frequency signal to produce a phase-shifted first high frequency signal; and a phase shift controller (116) arranged to control operation of the phase shifter (114) in response to instructions from the computer (12). The receiver mechanism comprises a mixer (104) and a first signal conditioning circuit (106). The mixer (104) is responsive to the phase-shifted first high frequency signal and to a second high frequency signal to produce a mixer output signal. The first signal conditioning circuit (106) is responsive to the mixer output signal to produce a receiver output signal. The data acquisition device (34, 108) is responsive to the receiver output signal and the computer (12) is connected to the data acquisition device to receive data therefrom. The computer (12) is arranged to control the phase shifter (114) and to analyse data from the data acquisition device (34, 108) to determine a position of the phase shifter (114) corresponding to the mixer (104) being phase-sensitive, and to determine a conversion ratio of the receiver mechanism. A receiver per se, is also provided comprising the mixer (104) connected to first and second high frequency inputs, the phase shifter (114) provided between the second high frequency input and the mixer (104), a frequency counter circuit (110) to count the frequency of either of the input frequency signals, the receiver controller (116) and the first signal conditioning circuit (106). The receiver controller (116) is connected to the frequency counter circuit (110) to read the frequency count and communicate it to the signal analysis instrument (10).
13 Citations
23 Claims
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1. A signal analysis instrument, comprising:
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a computer;
a phase shift mechanism comprising;
an input for receiving a first high frequency signal;
a phase shifter arranged to act on said first high frequency signal to produce a phase-shifted first high frequency signal;
a phase shift controller arranged to control operation of the phase shifter in response to instructions from said computer;
a receiver mechanism, comprising;
a mixer responsive to the phase-shifted first high frequency signal and to a second high frequency signal to produce a mixer output signal therefrom;
a first signal conditioning circuit responsive to the mixer output signal to produce a receiver output signal;
a data acquisition mechanism responsive to the receiver output signal, the computer being connected to the data acquisition mechanism to receive data therefrom;
said computer arranged to control said phase shifter and to analyse data from said data acquisition mechanism to determine a position of said phase shifter corresponding to said mixer being phase-sensitive, and to determine a conversion ratio of said receiver mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A receiver for a signal analysis instrument, comprising:
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first and second high frequency inputs for receiving first and second high frequency signals;
a mixer connected to the first and second high frequency inputs to produce a mixer output signal from the first and second high frequency signals;
a phase shifter provided between the second high frequency input and the mixer;
frequency counter responsive to one of the first or second high frequency signals to provide a frequency count thereof;
receiver controller arranged to control operation of the phase shifter, said receiver controller being connected to said frequency counter to read the frequency count therefrom, and to communicate the frequency count to the signal analysis instrument; and
a first signal conditioning circuit responsive to the mixer output signal to produce an output signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification