Backup battery:
If the power supply fails, an onboard realtime
clock keeps time and date information
important system parameters are stored in the
RAM of the system lifetime of the Lithium battery
at least 10 years
Pulse outputs:
Active only ’if sync’
PO_0:
change of seconds (PPS)
pulse duration 200 msec
valid on rising edge
PO_1:
change of minute (PPM)
pulse duration 200 msec
valid on rising edge
Accuracy of pulses:
Better than
±
1
µ
sec after synchronization and 20 minutes of operation
Serial port:
Configurable RS-232 interface
baudrates:
300 Bd...115200 Bd
framing:
7E2, 8N1, 8N2, 8E1
7N2, 7E1, 801
Mode of operation:
string per second
string per minute
string on request
Time telegram:
Meinberg Standard
Uni Erlangen, SAT
Meinberg Capture, ION
Computime, SPA, RACAL
Capture inputs:
Triggered by falling TTL slope
pulse repetition time:
1.5 msec min.
resolution:
800 nsec
output of trigger event via PCI-bus or serial interface
Master Oszillator:
TCXO
(Temperature Compensated Xtal Oscillator)
Accuracy compared to IRIG-reference:
sync. and 20 min. of operation:
±
5(10
-9
)
first 20 min. after sync.:
±
1(10
-8
)
Accuracy of oscillator:
holdover, 1 day:
±
1(10
-7
)
holdover, 1 year:
±
1(10
-6
)
Short term stability:
≤
10 sec, synchronized:
±
2(10
-9
)
≤
10 sec, holdover:
±
5(10
-9
)
Temperature dependant drift:
holdover:
±
1(10
-6
)
Reliability of operation:
Microprocessor supervisory circuit provides watchdog timer,
power supply monitoring and backupbattery
switchover software watchdog monitors correct program
flow and generates a reset in case of error detection
Initialization:
Software and realtime clock can be set by a serial Meinberg
Standard Telegram via COM0 or the PCI-Express bus
28
Date: 6th May 2021
TCR180PEX-EL
