CAS-4A / CAS-4B DOPPLER

  • Hi i am having a problem with the doppler shift with this two sattelites ,maybe is not a doppler problem .Specific when i start the programm satpc32 and begin the process to control the doppler i heard myself to the downlink with a small correction with the arrows next to the freg at the satpc32 winndow. After a few seconds i see at the sdr of the 9700 my signal goes up or down a few hz about 5 i say ,i correct again and after again my voice is out about 5hz from the dowlnlink freg .I see at the programm and my 9700 the same freg .But why is this happened.With the rs-44 having no problem ,with the fm sats no problem again ,why with this two .