FASTRAK MANUAL
Rev. G
83
JUNE 2012
‘y’ – Set Synchronization Mode
Syntax:
y[s
mode
]<>
or
y<> to read back the current synchronization mode
Description:
Synchronization allows for any one of four conditions:
1.
The FASTRAK system can operate in its default condition with the data cycle
time set to 8.3 milliseconds. This can be achieved by setting the system to
Internal Sync Mode.
2.
One to four FASTRAK systems can operate in relatively close proximity
without interfering with each other. (The interference is generally seen as
noise, where measurements change without physically moving receiver
position or orientation.) This can be achieved by setting the system to External
Sync Mode and linking the systems together with a sync cable.
3.
The FASTRAK cycle time can be set externally with a sync pulse generator.
This can be achieved by setting the system to External Sync Mode and
connecting to the external pulse.
4.
The FASTRAK receivers can operate in relatively close proximity to a CRT
video monitor without picking up interference. This can be achieved by
setting the system to Video Sync Mode and connecting the video sync
detector between the FASTRAK and the CRT monitor.
Purpose:
This command allows the host to set the system synchronization mode. The
specific parameters are:
s
mode
Description
0
Internal Sync Mode
. Signifies that the system is synced internally
(8.3 milliseconds/cycle time).
1
External Sync Mode
. Signifies that the system is externally
synced to another FASTRAK system or an external sync source.
(Note: This setting can not be saved to EEPROM with the ‘^K’
command.)
2
Video Sync Mode
. Signifies that the system is synced via a video
frequency pickup coil.
Relatives:
None.
Default:
0
Internal Sync Mode
Example:
If the user had a requirement to operate two FASTRAK systems in relatively
close proximity, the following steps should be taken: