SA.45s Chip-Scale Atomic Clock
SA.45s CSAC User Guide Revision D
34
Figure 16 • CSACdemo in Locked Condition
The previous screen shot shows typical values for a normally operating CSAC. In this case, the internal
case temperature of the CSAC is 24.86 °C, the operating mode is 0x0000 (see
) and there are no alarms. The physics package parameters in
are fairly typical as well: the laser current is about 1.15 mA, the physics package heaters are
drawing less than 25 mW, and the DC signal level is about 1 V. The TCXO tuning is mid-range on 0 V–2.5
V and the contrast is comfortably above 1000.
3.6
Data Acquisition with CSACdemo
For long-term monitoring of the CSAC, select the
panel from the
menu (see
Options…
File
).
Choose a polling rate in seconds. For short-term (1–2-day) measurements, a polling rate of 10 seconds is
optimal, and accumulates data onto disk at a rate of about 1 MB/day. For longer term measurements
(30 days–100 days), a longer polling rate, such as 60 seconds, reduces the growth of the data file to 150
KB/day.
Enable
with the checkbox in the top right of the panel.
Save to Disk
Use the
button to select an existing Directory to archive the CSAC data.
Browse…
Note: You must have write permission to the selected directory. Type in a
for the data.
Filename
When you are finished, the panel will look like the following screen shot.
