[time-nuts] Shera code
EWKehren at aol.com
EWKehren at aol.com
Sat May 25 15:58:44 EDT 2013
Questions have come up on the recent release of the Shera code. All
software commands with the exception of Auto N get lost in case of power failure.
Auto N is stored in EEPROM. After power fail Dip switches take over. Alpha
filter can be activated with software commands or switch #5. #5 can be DAC
Hold or Alpha present compiled code is Alpha. An open switch on #5 is
Alpha on. In manual or auto N Alpha is first engaged in filter 4 position. If
auto N is enabled and there is a power fail and #5 is open code will run up
to the value selected by the Dip switches and once it reaches 4 enables
Alpha filter. Also some status commands have been added listed below
Bert Kehren
;Status bits (RS232):
; bits
; 0-7 N value as always
; +10 glitch detected
; +20 alpha filter actually used
; +50 alpha filter enabled
; +100 "unlock" LED on
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