See SG24-2070 S/290 Time Management and IBM 9037 Sysplex Timer 300 plus pages.
My interpretation is that the Sysplex Timer IS the ETR. You connect it to an ETS (External Time Source), modem dialing NIST (what we do here), GPS or WWV receiver and that gets the timer in sync with the rest of the world. The timer then causes the clock(s) in the processor to be adjusted to this time. Coming in z/OS 1.7 is a feature called STP (if I remember right) that makes the Sysplex timer obsolete and allows getting time from the network. Alan ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
