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6021GPS GPS Satellite Clock - V01.00
hopf
Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
3.9.3.4 Example
(STX)E4123456180702(LF)(CR)(ETX)
•
It is Thursday 18.07.2002 - 12:34:56 o'clock.
•
radio operation (high accuracy)
•
daylight saving time
•
no announcement
•
( ) - ASCII-control characters e.g. (STX)
3.9.3.5 Serial Requests with ASCII Characters (
hopf
Standard and
hopf
2000)
The transmission of a data string can also be triggered by the user on enquiry by means of
an ASCII character. The following characters trigger the transmission of the standard string:
•
ASCII
"D"
- for Time / Date (Local Time)
•
ASCII
"G"
- for Time / Date (UTC Time)
The System answers within 1msec. with the corresponding data string.
Since this is often too fast for the requesting computer, it is also possible to realize a
response delay in 10msec. steps on request via software. For the delayed transmission of
the data string, the requesting computer transmits the lower case letters "
d
,
g
" to the clock
with a two position multiplication factor.
The clock interprets the multiplication factor as a hexadecimal value.
Example:
The computer transmits
ASCII gFF
(Hex 67, 46, 46)
The clock transmits the Time / Date (UTC Time) data string after approx. 2550 milliseconds.