Symmetricom Time Server Manual Do Utilizador

Chapter 4: Serial or Telnet I/O Functions

Use Function 67 to retrieve information regarding upcoming leap seconds.  This is 

satellite information and cannot be changed through the unit.  Although UTC leap second 

adjustments may be performed on four occasions annually, in practice they are only 

performed twice: June 30

th

 and December 31

st

.

To return the leap second status, send the following command:

where

F

=

ASCII character 

F =

function 

number

<Enter>

=

input line terminator

<CR><LF>

=

output line terminator

An example of the response might be:

F67 06/30/96 +1 <CR><LF>

This response indicates there is a leap second addition during the last minute of 

June 30, 1996.
If there was no leap second pending, the response might be:

F67 none <CR><LF>

Use Function F72 to display the status of the antenna feed circuit, and GPS lock status 
fault detectors within the unit.

To display the status of the fault detectors, send the following command:

The unit responds:

F72<SP>Antenna: <ANT STATUS> GPS: <GPS STATUS><CR><LF>

where:

F

=

ASCII character F

72

=

function number

<SP>

=

space

<ANT STATUS>

=

OPEN, GOOD or SHORTED

<GPS STATUS>

=

LOCKED, UNLOCKED

<CR><LF>

=

output line terminator

Sample entry:

The response might be:

F72 Antenna: OK  GPS: Locked<CR><LF>