[Premium-Rx] ETM-1810 and ETM 1820 HF Modem

[gw0ezy at sky.com]

Sorry if this is OT but I have purchased one of these hf-modems that are appearing on the surplus market. There is some information about their applications available on the crypto museum website. I am looking for a handbook/manual to understand the various controls/software commands. I  would appreciate any information and suggestions to locate a source of manual.

Please PM if required.

73 Terry G0EZY