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How to use the RF detector and ADC module on the ARAD1000EVAL1Z board

Category: Software



We notice that there is a RF detector and ADC module on the ARAD1000EVAL1Z board. And user can read the power value directly using "sray.LTC2314RFPower". In this case:

1. Can we use this module to test the output signal of the ADXUD1A board, which is directly connect the output of the ADXUD1A such as J1A to J9 on the Stingray?

2. Can we test the frequency of the input signal using this RF detector module? 

3. How can we use this module to calibrate the ARAD1000EVAL1Z?

Thanks for your kind help!



  • Hi Dongyu, 

    A user can connect a RF signal to the LTC2314 detector on board to the ADAR1000EVAL1Z. The RF detector cannot discern frequency of the signal, only a voltage that is proportional to the amplitude of the received RF signal. The readout from sray.LTC2314RFPower will be a voltage value generated from the on-board HMC948.

    One method of calibration using the RF detector is what can be considered as a "null power" method. Two channels of interest are combined and fed into the J9 port of the ADAR1000EVAL1Z. The phase of the reference channel is kept fixed while the phase of the other channel is rotated in phase from 360 degrees. The Vout from the RF detector can be monitored for each step in phase. The phase value at which the combination of the two signals produces the lowest magnitude will be considered the "null". 180 degrees can be added to this phase value to determine the phase at which both signals are aligned. This seqeunce can be repeated to determine the relative phase offsets with respect to a reference channel. 


  • Hi Sam,

    Thanks for your detailed answer! I got it!