Flachmann und Heggelbacher Docklight V2.2, Руководство пользователя

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Docklight V2.2 User Manual 07/2016 Copyright 2016 Flachmann und Heggelbacher GbR
Reference
8.12 Dialog: Expert Options
Menu Tools > Expert Options...
Expert Options are additional settings for specialized applications with additional
requirements (e.g. high time tagging accuracy).
Performance
Communication Driver Mode
Use External / High Priority Process mode to work around a common problem for any
Windows user mode application: unspecified delays and timing inaccuracies can be
introduced by the Windows task/process scheduling, especially if you are running other
applications besides Docklight.
External / High Priority Process mode is recommended for high accuracy / low
latency monitoring using the Docklight Tap .
NOTE: For even higher and guaranteed time tagging accuracy, use the Docklight Tap
Pro / Tap 485 accessories. Their accuracy does not depend on Windows and driver
latencies, and High Priority Process mode is not required for Tap Pro and Tap 485
applications.
In External / High Priority Process mode, the data collection in Docklight becomes a
separate Windows process with Realtime priority class. It will be executed with higher
priority than any other user application or additional application software like Antivirus.
For best results you need to be logged in as an
Administrator . Otherwise the data
collection process will run with the maximum permitted priority, but not "Realtime
class".
External / High Priority Process mode must be used with care, especially when you
intend to monitor a high-speed data connection with large amounts of data. The PC
might become unresponsive to user input. To resolve such a situation, simply "pull the
plug": First disconnect the data connections or the monitoring cable to bring down the
CPU load and restore the responsiveness. Then choose Stop communication in
Docklight.
NOTE: See the section How to Obtain Best Timing Accuracy for some background
information on timing accuracy.
Docklight Monitoring Mode
When Monitoring Serial Communications Between Two Devices , all received data from
one COM port is re-sent on the TX channel of the opposite COM port by default ("Data
Forwarding"). This is intended for special applications that require routing the serial data
traffic through Docklight using standard RS232 cabling.
Use the No Data Forwarding Expert Option for applications with two serial COM ports
where you need to avoid that any TX data is sent. This can be used to improve
performance when using a
Docklight Monitoring Cable , or to work around problems
caused with unstable serial device drivers.
For Docklight Tap applications (e.g. using Communication Channel TAP0 / TAP1), the
'Data Forwarding' setting has no effect. The Docklight Tap is accessed in read-only
mode always, and no data is forwarded.