User Manual Part 2

IS-900 User Guide Page 142 of 159
Enabling GENLOCK via Command
Send the C command to the tracker to place it in continuous mode. If the tracker is used
in polled mode, its internal updates will be synchronized to the sync signal but data
record output will not.
Send the InterSense-specific GENLOCK command to the tracker.
MG[state,[rate]]<>
State 0 Genlock off (free run)
1 Reserved—has no effect on the GENLOCK state.
2 Use external sync, strobe rate specified by rate parameter
(manual).
3 Use internal sync, output data records at frequency
specified by rate parameter.
rate For state 2, the sync strobe rate in hertz. For state 3, the
data record output rate in hertz. 30 Hz minimum in either
case.
Current settings of state and rate are reported if the command is issued without
parameters (or invalid ones).
The Fastrak command y{state}<> is not recognized by the IS-900, but has the
equivalent function the MG command with state equal to 0 or 1. If the Fastrak y{state}<>
command is used in your code, remember to manually configure GENLOCK via the LCD
menu to the settings required by the application.
ISDEMO can be used to send the GENLOCK command using the Send Command
String option. GENLOCK settings can be saved to the tracker using ISDEMO, using the
^K command or using the LCD (if equipped).
Enabling GENLOCK via LCD Menu
Select Communication→Data Output→Sample Mode→Continuous to place the tracker
in continuous mode. If the tracker is used in polled mode, its internal updates will be
synchronized to the sync signal but data record output will not.
Select System Config→GENLOCK→State and then one of the following choices.
Off GENLOCK off
Manual Use external sync (select strobe rate in 5 Hz increments
using arrow buttons, then press the enter button)
Internal Use internal sync (select data record output rate in 5 Hz
increments using arrows buttons, then press the enter
button)