77
Read/write registers
• Both
•
0x31 set to 0514 – both (internal & external) - wide range
•
0x31 set to 0516 – both (internal & external) - narrow range
Setting the
wavelength
modulation signal
coupling
To set the signal coupling for the wavelength modulation option, use bit 4 of
register 0x31. Setting the bit to 0 configures wavelength modulation to use AC
coupling and 1 means to use DC coupling.
Figure 48 Setting the coupling type
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