Meinberg GPS164xHS - Manual (Page 10)

10
Available time codes
The time code generator of the module GPS164xHS is able to generate the time-
codes shown below. The modulated codes (IRIG B122/B123, AFNOR, IEEE1344)
are available via the BNC-connector, the unmodulated codes (IRIG B002/B003 and
IEEE1344) via a DSUB connector in the front panel. The unmodulated codes are
available as a transistor output with internal pull up (470
Ω to +5V), with TTL-level
into 50
Ω and with RS422 level.
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
AFNOR: 100pps, amplitude modulated sine wave signal, 1 kHz carrier frequency
BCD time of year, complete date, SBS time of day
output level adapted
IEEE1344: Code according to IEEE1344-1995
100pps, AM-Sine wave signal, 1kHz carrier frequency,
BCD-time of year, SBS time of day
IEEE1344 extensions for:
date, timezone, daylight-saving and leap second
in control functions ( CF ) segment.
also see table ‘Assignment of CF segment in IEEE1344 mode’
Code generation
In the default mode of operation the IRIG/AFNOR ti mecode outputs are disabled
until the GPS-receiver has been synchronized after power-up. The generation of the
IRIG-code only starts after synchronization therefore.
If the code must be available immediately after power-up, the software GPS-
MON32 can be used to enable the time code output without synchronization of the
GPS-receiver by setting the enable flag 'pulses' to 'always'. In this mode of operation
the IRIG-code is not locked to UTC-second until synchronization.