High density low cost wideband production RF test instrument architecture
First Claim
1. An apparatus of a testing device, comprising:
- a receiver path of the testing device comprising;
a pair of receiver switches, the receiver path configured to set the receiver switches in a receiver bypass position for reception of a signal from a device under test (DUT) of at most a first predetermined frequency and in a receiver direct position for reception of a signal of more than the first predetermined frequency; and
first double conversion circuitry to which the signal of more than the first predetermined frequency is introduced and that is configured to convert the signal of more than the first predetermined frequency to a signal of the first predetermined frequency, the signal of the first predetermined frequency and the signal of at most the first predetermined frequency supplied to one of the receiver switches; and
a transmitter path comprising a pair of transmitter switches in a transmitter bypass position for transmission of a signal to the DUT of at most the first predetermined frequency and in a transmitter direct position for transmission of a signal of more than the first predetermined frequency through second double conversion circuitry that is configured to convert the signal of more than the first predetermined frequency to the signal of the first predetermined frequency, the signal of at most the first predetermined frequency and the signal of more than the first predetermined frequency supplied to one of the transmitter switches.
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Accused Products
Abstract
A test apparatus and method of testing a DUT are described. The apparatus includes a receiver and transmitter path each having a pair of switches that switch between a bypass position and a direct position. The bypass position is used for low frequency signals communicated through the apparatus. The direct position allows higher frequency signals to be double converted by upconversion to an IF signal and bandpass filtered before being downconverted to a predetermined frequency. Both variable and fixed LO signals are used to convert the double converted signals so that the same IF may be used independent of the higher frequency signal received or transmitted. Bandpass filtering is applied before and after amplification of the IF signal. Lowpass filtering before and after the double conversion use LPFs of different cutoff frequencies.
9 Citations
20 Claims
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1. An apparatus of a testing device, comprising:
a receiver path of the testing device comprising; a pair of receiver switches, the receiver path configured to set the receiver switches in a receiver bypass position for reception of a signal from a device under test (DUT) of at most a first predetermined frequency and in a receiver direct position for reception of a signal of more than the first predetermined frequency; and first double conversion circuitry to which the signal of more than the first predetermined frequency is introduced and that is configured to convert the signal of more than the first predetermined frequency to a signal of the first predetermined frequency, the signal of the first predetermined frequency and the signal of at most the first predetermined frequency supplied to one of the receiver switches; and a transmitter path comprising a pair of transmitter switches in a transmitter bypass position for transmission of a signal to the DUT of at most the first predetermined frequency and in a transmitter direct position for transmission of a signal of more than the first predetermined frequency through second double conversion circuitry that is configured to convert the signal of more than the first predetermined frequency to the signal of the first predetermined frequency, the signal of at most the first predetermined frequency and the signal of more than the first predetermined frequency supplied to one of the transmitter switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for operating a testing apparatus, the method comprising:
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controlling, using a controller in the testing apparatus, a device under test (DUT) to transmit a signal; switching reception between a receiver bypass position used when the signal has at most a first predetermined frequency and a receiver direct position when the signal has more than the first predetermined frequency; double converting the signal of more than the first predetermined frequency by upconverting the signal to an intermediate frequency (IF) signal before downconverting the IF signal to a signal of the first predetermined frequency; bypassing double conversion of the signal when the signal has at most the first predetermined frequency; and supplying to an analog-to-digital converter (ADC) the signal of the first predetermined frequency or the signal of at most the first converted frequency, depending on whether the receiver bypass position or receiver direct position is being used, the signal from the ADC used to evaluate the DUT. - View Dependent Claims (13, 14, 15, 16, 17)
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18. At least one non-transitory machine-readable medium containing instructions for operating an apparatus of a testing device that configure the apparatus to:
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control a device under test (DUT) to transmit a DUT signal in a testing device reception mode and, in a testing device transmission mode, to receive a testing device signal from the testing device; switch reception between a receiver bypass mode when the DUT or testing device signal has at most a first predetermined frequency and a receiver direct mode when the DUT or testing device signal has more than the first predetermined frequency; double convert the DUT or testing device signal of more than the first predetermined frequency by; in the testing device reception mode, upconversion of the DUT signal to an intermediate frequency (IF) signal before downconversion of the IF signal to a signal of the first predetermined frequency; and in the testing device transmission mode, upconversion of the signal of the first predetermined frequency to the IF signal before downconversion of the IF signal to the testing device signal; and bypass double conversion of the DUT or testing device signal when the DUT or testing device signal has at most the first predetermined frequency. - View Dependent Claims (19, 20)
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Specification