Microchip LN-CSAC-SA65 handleiding
Handleiding
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LN-CSAC Model SA65-LN User’s Guide
2024 Microchip Technology Inc. and its subsidiaries DS50003805A-page 25
HeaterBoostLimit is a non-volatile parameter that specifies the maximum power
provided by the heater control circuit. The units of HeaterBoostLimit are milliwatts,
the limits are 50 mW to 250 mW, and the default value is 50 mW. (see
Section 3.3.11 “Set HeaterBoostLimit (.)”).
With HeaterBoostLimit set to the default value of 50 mW, the LN-CSAC will meet
the warm-up power specification on the data sheet. Increasing the value of
HeaterBoostLimit will improve lock time at the expense of warm-up power, beyond
the data sheet specification.
To configure HeaterBoostLimit using Clockstudio select the Power Management tab
shown in Figure 2-8.
FIGURE 2-8: Clockstudio Power Management Tab.
Enter the desired settings and click Apply Changes to upload new settings to the
LN-CSAC.
2.12 TIME-OF-DAY
The LN-CSAC maintains time-of-day (TOD) as a 32-bit unsigned integer, which is
incremented synchronously with the rising edge of the 1 PPS output. Until set other-
wise, TOD begins counting from zero when the LN-CSAC is powered on.
TOD is retrieved from the LN-CSAC with the !T? command (see
Section 3.3.8 “Time-of-Day (TOD)”). When the !T? command is received, the
LN-CSAC waits for the next rising edge of 1 PPS before replying with the TOD of the
current epoch, that is, if the command is received during epoch N, then the reply N+1
appears immediately following the next PPSOUT. This strategy provides the host sys-
tem with minimum ambiguity in interpreting the response.
Note: During startup at low temperatures, continuing to increase Heater-
BoostLimit may not significantly decrease TTL. This is due to the physics
package being able to achieve nominal temperature much faster than the
EMXO which does not have the capability to adjust the warm-up power. If
the physics package is at temperature, but the EMXO is not, the clock may
need to attempt to lock multiple times before it is achieved.
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Productinformatie
| Merk | Microchip |
| Model | LN-CSAC-SA65 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 6392 MB |
