6 Functional description of receiver
The TCR180 can automatically convert its on-board UTC time to some local time, including automatic switching
to and from DST year by year according to configurable rules. This is independent from the UTC offset of
the incoming time code. The derived local time can be transmitted via the outgoing time code, the serial time
strings, or can be read via the PCI interface.
The time zone is entered as offset of seconds from UTC, e.g. for Germany:
MEZ = UTC + 3600 sec, MESZ = UTC + 7200 sec
The specific date of beginning and end of daylight saving can be generated automatically for several years.
The receiver calculates the switching times using a simple scheme, e.g. for Germany:
Beginning of daylight saving is the first sunday after March, 25th at two o’clock => MESZ
End of daylight saving is the first sunday after October, 25th at three o’clock => MEZ
The parameters for time zone and switching to/from daylight saving can be set by using the included mon-
itor program. If the same values for beginning and end of daylight saving are entered then no switching to DST
is made.
The associated settings can be changed using the configuration software shipped with the driver packages.
Most IRIG codes don’t include an announcement flag
for the DST change, or for the for the insertion of
a leap second, so the TCR180 will switch into free
wheeling mode on such event, and resynchronize a few
seconds later.
The board TCR180 decodes the following formats:
Please note:
all
"A"
und
"G" Timecodes
are only available
after
warmed up phase of the oscillator!
A002:
1000pps, DC Level Shift pulse width coded, no carrier
BCD time of year
A132:
1000pps, amplitude modulated sine wave signal, 10 kHz carrier frequency
BCD time of year
A003:
1000pps, DC Level Shift pulse width coded, no carrier
BCD time of year, SBS time of day
A133:
1000pps, amplitude modulated sine wave signal, 10 kHz carrier frequency
BCD time of year, SBS time of day
B002:
100pps, DC Level Shift pulse width coded, no carrier
BCD time of year
B122:
100pps, amplitude modulated sine wave signal, 1 kHz carrier frequency
BCD time of year
B003:
100pps,DC Level Shift pulse width coded, no carrier
BCD time of year, SBS time of day
B123:
100pps, amplitude modulated sine wave signal, 1 kHz carrier frequency
BCD time of year, SBS time of day
B006:
100 pps, DC Level Shift, no carrier
BCD time-of-year, Year
B126:
100 pps, AM sine wave signal, 1 kHz carrier frequency
TCR180
Date: 4th June 2021
11
Summary of Contents for TCR180
Page 1: ...MANUAL TCR180 IRIG Code controlled Radio Clock 4th June 2021 Meinberg Funkuhren GmbH Co KG...
Page 2: ......
Page 30: ...12 2 Time code Format 12 2 1 IRIG Standard Format 26 Date 4th June 2021 TCR180...
Page 31: ...12 Technical appendix TCR180 12 2 2 AFNOR Standard Format TCR180 Date 4th June 2021 27...
