Applent Instruments AT381x, User Manual, Page: 120 / 134

AT381x User's Guide
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12.6.3 Spot frequency Correction Setting [5010H-5015H]
The AT381x point frequency can be set by the register [point frequency 1:5010~5011], [point
frequency 2:5012~5013] and [point frequency 3:5014~5015], where set to 00000000 means
the point frequency is off.

Write
Point frequency 1 ： 1kHz (Single precision floating point number ： 44 7A 00 00)
1 2 3 4 5 6 7 8 9 10 11 12 13
01 10 50 10 00 02 04 44 7A 00 00 3B 89
write register number of
registers
byte data CRC
Response ：
1 2 3 4 5 6 7 8
01 10 50 10 00 02 51 0D
register number of
registers
CRC

Read
1 2 3 4 5 6 7 8
01 03 50 10 00 02 CF 1A
read register number of
registers
CRC
Response ：
1 2 3 4 5 6 7 8 9
01 03 04 44 7A 00 00 CF 1A
byte data 1000 CRC
12.6.4 Spot Frequency Open Circuit Correction [5020H]
By writing the point frequency 0001~0003 to the register 5020, the AT381x will begin to
perform an open-circuit point frequency correction.
After clearing is complete, you can get the clear status by reading the 5008 register:
0000
Correction success
FFFF Correction fail

Write
Please write the point frequency to the 5020 register: 0001~0003, and execute the
corresponding point frequency open circuit correction.
Send: 01 10 5020 0001 02 0001 30F5
Response: 01 10 5020 0001 1103

Read
During the execution of correction, can determine whether correction is completed by
reading the register data.
Send ： 01 03 5020 0001 94C0
Response ： 01 03 02 0000 B844