Sundance SMT941 - Manual (Page 39)

User Manual SMT941 Page 39 of 43 Last Edited: 23/08/2011 17:24:00
0 128 steps for a range of 0.134dB
Setting Bit 10:8 Description Test Patterns ChB
0 ‘000’ Normal Mode of Operation
1 ‘001’ Outputs all zeroes
2 ‘010’ Outputs all ones
3 ‘011’ Outputs toggle pattern (0x1555 and 0x2AAA)
4 ‘100’ Outputs digital ramp (0->16383)
5 ‘101’ Outputs custom pattern
ADC Chcd Register 9 0x49.
ADC Chcd Register 9 0x49
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Reserved Offset Pedestal ChB (Common)
Default ‘00’
1 Reserved
Default ‘00000000’
ADC Chcd Register 9 0x49
Setting Bit 5:0 Description Offset Pedestal ChA (Common)
0 ‘011111’ Pedestal=+31LSBs
1 ‘011110’ Pedestal=+30LSBs
2 … …
3 ‘000000’ Pedestal=0
4 … …
5 ‘111111’ Pedestal=-1LSB
6 ‘111110’ Pedestal=-2LSB
7 … …
8 ‘100000’ -32LSBs