Sorry for the delay, I didn't see your response. [Kenwood TS-590] CmdType=TEXT PTTOn=TX1; PTTOff=RX; ModeUSB=MD2; #ModeUSB_D=DA1; ModeUSB_D=MD2;DA1; ModeFM=MD4; SetFreq_Data_method=TEXT SetFreqVfoA_Cmd=FA{};MD2;DA1; SetFreqVfoA_param_length=11 SetFreqVfoA_hz_res=1 ReadFreqVfoA_Cmd=FA; ReadFreqVfoA_Result_Data_method=TEXT ReadFreqVfoA_Result_hz_res=1 ReadFreqVfoA_Result_Length=14 ReadFreqVfoA_Result_Freq_Start_Pos=3 ReadFreqVfoA_Result_Freq_Length=11

That sounds like a reasonable approach but would not allow the use of FM or other modes. The first example did work -- FA{};MD2;DA1; But that always forces the mode to USB Data, can't switch to FM for instance.

Not knowing your internal structure I'm not sure, but the mode needs to be sent after the frequency rather than before. Assuming your internal parser converts &MODE to the selected mode value (like MODE_USB) and then the second expansion converts that to the value MD2; the code would look like: SetFreqVfoA_Cmd=FA{};&(&MODE) Or you might want to add a flag "SetModeAfterFrequency=1/0 or Y/N Does that make sense?

Thank you. That answered the question... In the TS-590, mode (USB/etc) and Data/not are at the band level. To my reading of the log (below), it sets mode/data (MD2/DA1) and then changes frequency (FA#####). So the MD2/DA1 are working but on the prior band. 02/08/2022 14:48:27 - Debug mode enabled 02/08/2022 14:48:27 - Loading COM Port configuration from ini file 02/08/2022 14:48:27 - Loading Cat Commands configuration from ini file 02/08/2022 14:48:27 - Loading Rig Control Commands from ini file 02/08/2022 14:48:27 - Loading OmniRig configuration from ini file 02/08/2022 14:48:27 - Loading DTR_RTS Port configuration from ini file 02/08/2022 14:48:27 - Loading VARA modem configuration from ini file 02/08/2022 14:48:27 - Loading My Info file 02/08/2022 14:48:27 - FREQ Schedule off 02/08/2022 14:48:27 - Loading parking schedule 02/08/2022 14:48:27 - Locating Misc configuration from ini file 02/08/2022 14:48:28 - Enabling CAT frequency read 02/08/2022 14:48:28 - End of Load_configuration 02/08/2022 14:48:28 - Cat command (TEXT): FA; 02/08/2022 14:48:28 - Opening com port 02/08/2022 14:48:28 - Writing to com port 02/08/2022 14:48:28 - CAT cmd result: 02/08/2022 14:48:28 - CAT result after echo stripping: 02/08/2022 14:48:30 - Changing frequency: user selection from dropdown menu. 02/08/2022 14:48:30 - Frequency converted value:00007105000 02/08/2022 14:48:30 - Cat command (TEXT): MD2;DA1; 02/08/2022 14:48:30 - Writing to com port 02/08/2022 14:48:30 - CAT cmd result: 02/08/2022 14:48:30 - Cat command (TEXT): FA00007105000; 02/08/2022 14:48:30 - Writing to com port 02/08/2022 14:48:30 - CAT cmd result: 02/08/2022 14:48:30 - Change combobox freq text to: 7.105.000 02/08/2022 14:48:30 - Change combobox freq color 02/08/2022 14:48:31 - Change combobox freq color 02/08/2022 14:48:32 - Cat command (TEXT): FA; 02/08/2022 14:48:32 - Writing to com port 02/08/2022 14:48:32 - CAT cmd result: 02/08/2022 14:48:32 - CAT result after echo stripping: 02/08/2022 14:48:32 - Change combobox freq color 02/08/2022 14:48:32 - Changing frequency: user selection from dropdown menu. 02/08/2022 14:48:32 - Frequency converted value:00003595000 02/08/2022 14:48:32 - Cat command (TEXT): MD2;DA1; 02/08/2022 14:48:32 - Writing to com port 02/08/2022 14:48:33 - CAT cmd result: 02/08/2022 14:48:33 - Cat command (TEXT): FA00003595000; 02/08/2022 14:48:33 - Writing to com port 02/08/2022 14:48:33 - CAT cmd result: 02/08/2022 14:48:33 - Change combobox freq text to: 3.595.000 02/08/2022 14:48:33 - Change combobox freq color 02/08/2022 14:48:34 - Cat command (TEXT): FA; 02/08/2022 14:48:34 - Writing to com port 02/08/2022 14:48:34 - CAT cmd result: 02/08/2022 14:48:34 - CAT result after echo stripping: 02/08/2022 14:48:34 - Change combobox freq color 02/08/2022 14:48:35 - Change combobox freq color

Does DEBUG mode log the CAT strings being sent to the radio? Where is that file stored? Something strange is happening as I change frequencies.

Send the mode and data-mode with each frequency setting.

That seems to have fixed it for the first frequency. But each band seems to retain mode/data-mode independently. So if I switch frequency, I don't get USB nor Data set, only the initial.