Model: MC-1-M (2U)
Doc. Ref. no. : m05/om/101
Issue no. 14
User’s Manual
Page 60 of 103
10.2.11 Antenna Cable Propagation Delay command:
•
Command: SPDxxxxx (1PPS cable correction command/Propagation Delay)
-Only available on special request
Description: The M12M timing receiver outputs a 1PPS signal, the rising edge of which is placed at the
top of the GPS or UTC one second time mark epoch as specified by the Time Mode command. The 1PPS
Cable Delay Correction command allows the user to offset the 1PPS time mark in one nanosecond
increments relative to the measurement epoch.
This parameter instructs the GPS receiver to output the 1PPS output pulse earlier in time to compensate
for antenna cable delay. Up to one millisecond of equivalent cable delay can be removed. Zero cable
delay is set for a zero-length antenna cable.
The user should consult a cable data book for the delay per unit length for the particular antenna cable
used in order to compute the total cable delay needed for a particular installation.
This parameter may also be employed by the user to adjust the position of the 1PPS to compensate for
other system delays.
Range: 0to 99999 ns
Default value: 0 ns
Resolution: 1 ns
The user is allowed to change propagation delay. The command for changing propagation delay is:
“SPDxxxxx”
The default propagation delay is 0 ns. Suppose, user wishes to change it to 500 ns, then the command
will be:
SPD500 and then press enter.
Remember that the propagation delay should not exceed 99999 ns. If user enters value which is out of
applicable range, device will show error message “Invalid Command” and the previous value will be
retained.
•
Please refer the table 6.1 of section 6.1.5 for proper value.
•
This change in the value of this parameter will bring shift in 1PPS and other
output signal timing.
10.2.12 Manual Time Setting command:
-Only available on special request
Description: User can set time and date manually using this command. This command is basically used
when GPS receivers battery got discharged and antenna is not available then user can enter current time
manually.
Manual Time setting Command format is:
“M(hh:mm:ss,dd/mm/yy)”
,where
