Endace DAG 4.5G2 Card, Руководство пользователя

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EDM 01-18 DAG 4.5G2/G4/GF Card User Guide
dagclock -h
Usage: dagclock [-hvVxk] [-d] [-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
the DAG device
-K timeout
sync timeout in seconds, default 60
-l threshold
health threshold in ns, default 596
Option:
default
RS422 in, none out
None in, none out
none
rs422in
RS422 input
hostin
Host input (unused)
overin
Internal input (synchronize to host clock)
Aux input (unused)
auxin
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
Note: By default, all DAG cards listen for synchronization signals on
their RS-422 port, and do not output any signal to that port
dagclock –d0
muxin rs422
muxout none
status Synchronized 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
Card with
Reference
Overview
To obtain the best timestamp accuracy you should connect the DAG card to
an external clock reference, such as a GPS or CDMA time receiver.
To use an external clock reference source, the host PC’s clock must be
accurate to UTC to within one second. This is used to initialize the DUCK.
When the external time reference source is connected to the DAG card time
synchronization connector, the card automatically synchronizes to a valid
signal.
©2005-2006 27 Version 4: August 2006