Publication No. 981050 REV. A
PXIe-1209 User Manual
Astronics Test Systems
Identification and Configuration Registers 6-11
Reference Count - Low
PXIe-
1209
Reg.78
Bit
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
Write 15
(read
only)
0
Read
15
Low Order Bits
0
Reference Count - High
PXIe-
1209
Reg.7A
Bit
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
Write 31
(read
only)
16
Read
31
High Order Bits
16
Notes:
1. The count is a 2’s complement integer value. Each count represents a difference of approximately
0.0025ppm. A positive value indicates that the internal VCXO is slower than the external reference.
2. The registers must be read in the order low then high.
Summary of Contents for PXIe-1209
Page 22: ......
