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?
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?
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.
…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…
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…