5.2.2.2 ASCII Time Code RS-485 Outputs and Input
NetClock 9489 provides two (2) ASCII RS-485outputs, and one (1) ASCII RS-485 input.
Note: Units manufactured before April 2017 only have the two ASCII RS-485 Out
puts, i.e. Pins 1-6.
ASCII outputs
The ASCII outputs provide NetClock with the ability to output one or two back-to-back ASCII
time code data streams that can be provided to peripheral devices which accept an ASCII RS-
485 input data stream for either their external time synchronization or for data processing.
ASCII input
The ASCII input provides a serial data interface between an ASCII time generator (e.g.,
another NetClock unit), serving as an input reference in order to synchronize NetClock (in con
junction with, or in lieu of, other available inputs, such as GNSS).
Accuracy
Accuracy: ±100…1000 µs (format dependent)
Configuring the RS-485 ASCII Input/Outputs
To configure the ASCII Input (also referred to as ‘Reference’) or ASCII Output, navigate to the
corresponding Edit window under the INTERFACES menu in the Web UI (the Web UI list entries
are under ASCII TIMECODE RS-485.)
Input Edit window:
Format Group: Determines the time code message format category. Choices are:
Auto
Spectracom
NMEA
ICD-153
EndRun
Format: Once a Format Group has been selected, one or more Format fields may
appear, allowing you to select one or more time code Formats.
NetClock User Reference Guide 337
APPENDIX
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