EDM01-02: DAG 4.2S Card User Guide
©2005
24
Version 7: May 2006
6.1 Configurations Tool Usage
Description
The DUCK is very flexible, and can be used in several ways, with or
without an external time reference source. It can accept synchronisation
from several input sources, and can also be made to drive its
synchronisation output from one of several sources.
Synchronisation settings are controlled by the
dagclock
utility.
Example
dag@endace:~$ dagclock -h
Usage: dagclock [-hvVxk] [-d dag] [-K <timeout>] [-l
<threshold>] [option]
-h --help,--usage this page
-v --verbose
increase verbosity
-V --version
display version information
-x --clearstats
clear clock statistics
-k --sync
wait for duck to sync before
exiting
-d dag
DAG device to use
-K timeout
sync timeout in seconds, default
60
-l threshold
health threshold in ns, default
596
Option:
default
RS422 in, none out
none
None in, none out
rs422in
RS422 input
hostin
Host input (unused)
overin
Internal input (synchronise to
host clock)
auxin
Aux input (unused)
rs422out
Output the rs422 input signal
loop
Output the selected input
hostout
Output from host (unused)
overout
Internal output (master card)
set
Set DAG clock to PC clock
reset
Full clock reset. Load time
from PC, set rs422in, none out
By default, all DAG cards listen for synchronisation signals on their RS-
422 port, and do not output any signal to their RS-422 port.
dag@endace:~$ dagclock –d dag0
muxin rs422
muxout none
status Synchronised Threshold 596ns Failures 0 Resyncs 0
error Freq -30ppb Phase -60ns Worst Freq 75ppb Worst Phase 104ns
crystal Actual 100000028Hz Synthesized 67108864Hz
input Total 3765 Bad 0 Singles Missed 5 Longest Sequence Missed 1
start Thu Apr 28 13:32:45 2005
host Thu Apr 28 14:35:35 2005
dag Thu Apr 28 14:35:35 2005
