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4430-V & VN BPSK/QPSK VME Demodulator & Optional Modulator User’s Manual
Doc: 4430_V,VN.fm, © 11 Jul 2005, 14:55
3.5.6
Register 10h, 11h, 12h, 13h (21h, 23h, 25h, 27h), Demod Quadrature NCO
This group of registers provides the programming interface to the demodulator
quadrature NCO. The registers are to be programmed in a group as a single 32-
bit integer value and should be programmed with the same values as the demod-
ulator carrier frequency NCO registers.
Figure 3.5.6: Bit Assignments for the Demodulator Quadrature NCO Registers
Quadrature NCO Frequency [Bit weight = 1] LSB
Quadrature NCO Frequency [Bit weight = 2]
Quadrature NCO Frequency [Bit weight = 4]
Quadrature NCO Frequency [Bit weight = 8]
Quadrature NCO Frequency [Bit weight = 16]
Quadrature NCO Frequency [Bit weight = 32]
Quadrature NCO Frequency [Bit weight = 64]
Quadrature NCO Frequency [Bit weight = 128]
7
6
5
4
3
2
1
0
0/1
0/1 0/1
0/1
0/1
0/1
0/1
0/1
Reg. 10h
Quadrature NCO Frequency [Bit weight = 256]
Quadrature NCO Frequency [Bit weight = 512]
Quadrature NCO Frequency [Bit weight = 1024]
Quadrature NCO Frequency [Bit weight = 2048]
Quadrature NCO Frequency [Bit weight = 4096]
Quadrature NCO Frequency [Bit weight = 8192]
Quadrature NCO Frequency [Bit weight = 16348]
Quadrature NCO Frequency [Bit weight = 32768]
7
6
5
4
3
2
1
0
0/1
0/1 0/1
0/1
0/1
0/1
0/1
0/1
Reg. 11h
Quadrature NCO Frequency [Bit weight = 65536]
Quadrature NCO Frequency [Bit weight = 131072]
Quadrature NCO Frequency [Bit weight = 262144]
Quadrature NCO Frequency [Bit weight = 524288]
Quadrature NCO Frequency [Bit weight = 1048576]
Quadrature NCO Frequency [Bit weight = 2097152]
Quadrature NCO Frequency [Bit weight = 4194304]
Quadrature NCO Frequency [Bit weight = 8388608]
7
6
5
4
3
2
1
0
0/1
0/1 0/1
0/1
0/1
0/1
0/1
0/1
Reg. 12h
Quadrature NCO Frequency [Bit weight = 16777216]
Quadrature NCO Frequency [Bit weight = 33554432]
Quadrature NCO Frequency [Bit weight = 67108864]
Quadrature NCO Frequency [Bit weight = 134217728]
Quadrature NCO Frequency [Bit weight = 268435456]
Quadrature NCO Frequency [Bit weight = 536870912]
Quadrature NCO Frequency [Bit weight = 1073741824]
Quadrature NCO Frequency [Bit weight = 2147483648] MSB
7
6
5
4
3
2
1
0
0/1
0/1 0/1
0/1
0/1
0/1
0/1
0/1
Reg. 13h
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