SA.45s Chip-Scale Atomic Clock
SA.45s CSAC User Guide Revision D
28
Note: The single-character is a shortcut for
.
m
!m?[CRLF]
3.4.3.10
Set 1PPS Out Pulse Width as an Integer Multiple of Default Width (>)
CSAC's 1PPS output (pin 10) has a default pulse width that may not be sufficiently long for certain
applications. In such cases, the pulse width can be set to an integer times the default pulse width by
using the
command with this format:
!>
!>X[CRLF]
where X is the unsigned integer used as a multiple of the default 1PPS Out Pulse Width to set the
desired 1PPS Out's Pulse Width.
The allowed range of 1PPS Out Pulse Width integer multiple of default Pulse Width is from 1 to 4.
Example (set 1PPS Out Pulse Width as a 2x multiple of default Pulse Width):
Command:
!>2[CRLF]
Response:
PPS Pulse Width = 2 times ~100 usec [CRLF]
Note: The default pulse width is dependent on the selected frequency option for RF output (pin 12).
When RF output frequency of 10 MHz (option 001) is selected, then the 1PPS out pulse width default is
~100 microseconds, while for other RF output frequency option's the 1PPS out pulse width is as
specified on the datasheet.
To query the 1PPS Out Pulse Width setting, without modifying the values, use the command
.
!>?
Example (query current 1PPS Out Pulse Width setting):
Command:
!>?[CRLF]
Response:
PPS Pulse Width = 4 times ~100 usec[CRLF]
Note: The single-character is a shortcut for
.
>
!>?[CRLF]
3.4.3.11
Deferred Command (@)
Any command can be sent at a deferred time by using the
command with this format:
!@
!T@XXXX,YYYY[CRLF]
where XXXX is the deferred time in seconds and YYYY is the command that is sent after the deferred
time.
Example (defer sending the command by 10 seconds):
6
Command:
!@10,6[CRLF]
Unit response:
Deferred = 10,6
Unit response (after 10 seconds):
Status,Alarm,SN,Mode,Contrast,LaserI,TCXO,HeatP,
Sig,Temp,Steer,ATune,Phase,DiscOK,TOD,LTime,Ver
3.4.3.12
Help (?)
The following table lists all available commands in response to the command.
?
