In message <[EMAIL PROTECTED]>, Magnus Danielson writes: >Just look in the HP5370B service manual and you see that the GPIB interface is >"passive" (i.e. TTL chips rather than LSI chip). It may not be the marvel of >modernism.
Some of the smaller devices, like the VHF switches, the entire GPIB interface is TTL and all commands are single byte commands... btw: the reason for the limit on number of devices powered down is that NMOS/TTL based interface chips tend to clamp the bus to ground. This is less of a problem with modern CMOS based interface chips. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
