Related Manuals for SpinCore Technologies RadioProcessor USB
Summary of Contents for SpinCore Technologies RadioProcessor USB
- Page 1 RadioProcessor™ USB Low Frequency Operation Manual SpinCore Technologies, Inc. http://www.spincore.com...
- Page 2 SpinCore Technologies, Inc. makes every effort to verify the correct operation of the equipment. This equipment version is not intended for use in a system in which the failure of a SpinCore device will threaten the safety of equipment or person(s).
- Page 3 Table of Contents I.Preparing the Board for DC Operation...............4 II. Operating at Low Frequencies.................5 Acquisition Parameters..................5 III.Receiver Characteristics..................6 Acceptable Input Voltage Range..............6 Frequency Characteristics................6 IV.Contact Information..................8 www.spincore.com 2010-01-29...
- Page 4 I. Preparing the Board for DC Operation The receiver of the RadioProcessor is capacitively coupled, leading to attenuation at low frequencies. To operate at low frequencies, it is necessary to remove the capacitor (C680) at the input of the RadioProcessor. Illustration 1 below shows the location of C680. Illustration 1: Location of C680 NOTE: Removing the capacitor at C680 will introduce a DC offset in measured values when the receiver is loaded.
- Page 5 II. Operating at Low Frequencies Acquisition Parameters The filter pipeline of the RadioProcessor contains a CIC filter with a cut-off frequency of approximately 1 kHz. At low frequencies when using base-band conversion, the result of the conversion leads to spurious peaks in the pass-band of the CIC filter. To avoid these spurious peaks, it is necessary to set the spectrometer frequency to 0 Hz.
- Page 6 III. Receiver Characteristics Acceptable Input Voltage Range Testing of the RadioProcessor with C680 removed showed that the receiver is linear within the tested range of 0.5V to 2.0V. The input voltage to the RadioProcessor must be positive. To measure a range of voltages from negative to positive, introducing a DC offset that will shift the required voltage range into the linear operating region of the RadioProcessor is acceptable.
- Page 7 The data shown in Illustration 2 was collected by performing scans and taking the maximum magnitude point acquired for each frequency. The spectrometer frequency was set to 0.0 Hz, and the spectral width was set to 2 kHz for each acquisition. www.spincore.com 2010-01-29...
- Page 8 Contact Information SpinCore Technologies, Inc. Telephone: +1-352-271-7383 Web Form: http://www.spincore.com Product URL: http://www.spincore.com/products/RadioProcessor/ www.spincore.com 2010-01-29...
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