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APE1553-1/2(-DS) Hardware Manual
2.3.2.1 Trigger connection
Separate trigger inputs / outputs are provided for each MILbus-Channel at the
frontpanel connector.
The minimum trigger pulse length is 75 nanoseconds. For a pulse length shorter than
75ns it can’t be guaranteed that the trigger signal is detected.
The trigger inputs are high active with TTL voltage level and are 5V tolerant.
2.3.2.2 IRIG-B connection
The IRIG-Input and IRIG-Output signals shall be connected depending on the timetag
method used as shown below.
Case 1:
Single AIM-Module no external IRIG-B source
- No connection required
Case 2:
Multiple AIM-Modules with no common synchronization requirement
- No connection required
Case 3:
Single or multiple AIM-Module(s) with external IRIG-B source
- Connect external IRIG-B source to IRIG-IN and GND of all modules
Case 4:
Multiple AIM-Modules with no external IRIG-B source internally
synchronized.
- Connect the IRIG-OUT signal and the GND of the module you have
chosen as the time master to all IRIG-IN signals (including the time
master).
The frontpanel IRIG-B I/O is provided at the HD-DSUB26 Frontpanel-Connector.
In addition, a single IRIG-I/O signal is provided on the B2B connector, which can be
used as IRIG-Input (if in slave-mode) or as an IRIG-Output (if set to master-mode).
The IRIG-B output signal can be manually switched to the B2B connector by setting the
jumper position to “Master-Mode”.
ATTENTION:
To avoid signal collision only one board should drive the IRIG output signal.
