• Using HMC520A as BPSK.

    I am using HMC520A in a configurable modulator (QPSK/BPSK). When I am using this as BPSK can I just use one port from IF1 and IF2. Should I leave the other port open or terminate using 50 ohm resistance?

  • Questions about OQPSK design using HMC520A

    Hello, Everyone.

    I have a question about HMA520A.

    I am referring to figure 83 in the data sheet of the HMC520A.

    In Figure 83, an external 90 coupler creates a phase difference for the IF signal.

    But, the circuit I think is different from Figure 83.

    …

  • RE: HMC520ALC4 Characteristic Test Method Inquiry.

    Hi,

    Since this is a passive IQ mixer the degradation in phase and ampltiude balance from the HMC520A will be similar for up and downconversion. Since your IF input is around 80MHz, I suggest downconverting to 80 MHz with the same LO frequency. After making…

  • RE: HMC520ALC4 EVAL TEST RESULT....Is it correct ?

    Hi,

    The LO leakage that is shown matches the datasheet specification: 15dBm (LO Drive)- 43dB (LO Isolation)= -28dBm. From what I see here the conversion gain is too low. I think you are using HMC520A as an IQ Modulator. There is a way to reject the LO…

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