Is the ENA 6 series code compatible with the 871x series?

(SUPPORTED MODELS IN BOLD: E5071C E5072A E5070B/71B E5070A/71A E5061A/62A E5061B E5063A E5091A E5092A)

No. The E5061A/62A and E5061B use SCPI commands, while the 871x series has its own code structure and is not compatible with the E5061A/62A and E5061B.
871x to ENA 6 series code conversion kit is available to assist the code conversion.