Tekron TTM 01-G, User Manual, Page: 27 / 33

TTM 01-G Manual / October 2018 27
String-F Time Code O/P
Table 14 details the String F serial string format and fields.
About This string complies with the protocol required to drive Vorne type Time Displays.
Timing
The string is transmitted once every second, with the leading edge of the “start” bit of the
last <BEL> exactly on the second.
Default Comms 9600 bps, 8-bit ASCII, no parity
Definition
<CR><LF>1100<CR><LF>44hhmmss<CR><LF>54ddd<CR><LF><CR><LF>45HHMMss<CR>
<LF>55DDD<CR><LF><BEL>
Placeholder Content
<BEL> HEX 07
<CR> Carriage Return: HEX 0D
<LF> Line Feed: HEX 0A
1100 ASCII “1100”
<CR> Carriage Return: HEX 0D
<LF> Line Feed: HEX 0A
44 ASCII “44” (means local time follows)
hh Local hour of day: “00” – ”23”
mm Local minute of day: “00” – “60”
ss seconds: “00” – “59”
54 ASCII “54” (means local day of year follows)
ddd Local day of year: “001” – “365”
<CR> Carriage Return: HEX 0D
<LF> Line Feed: HEX 0A
45 ASCII “45” (means UTC time follows)
HH UTC hour: “00” – ”23”
MM UTC minute: “00” – “59”
ss UTC seconds: “00” – “59”
<CR> Carriage Return: HEX 0D
<LF> Line Feed: HEX 0A
55 ASCII “55” (means UTC Day of year follows)
DDD UTC Day of year: “001” – “365”
<CR> Carriage Return: HEX 0D
<LF> Line Feed: HEX 0A
<BEL> HEX 07
Table 14 - String-F Time Code Format Fields
Example :
<CR><LF>1100<CR><LF>44132530<CR><LF>54138<CR><LF><CR><LF>45012530<CR><LF>55138<CR><LF><BEL>
Interpretation:
Local time: 1:25:30pm, day 138.
UTC time: 1:25:30am, day 138.