NKT Photonics A203-000-001, Product Manual

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71
Signaling and CONTROL configuration
External signal
requirements
Electrical specifications for the COMMAND inputs are shown in
Table 10 COMMAND input specifications
Signaling and CONTROL configuration
For fast wavelength switching, CONTROL configuration determines the
wavelengths. Signals connected to the COMMAND module determine the
wavelength(s) selected. Refer to the figures in the following examples to see how
channel configuration relates to the input signals connected to the COMMAND
module from an application.
2 or 4-channel FWS
For switching 2 or 4 individual wavelengths, connect application signals to
module pins Blank and FSK1.
Table 11
shows a truth table demonstrating the
wavelengths selected based on the input signals levels from your application.
Figure 48
shows the configuration in CONTROL and how the configuration is
selected based on the signal levels at the two pins. To set up 2 or 4-channel fast
wavelength switching, follow the steps in
Procedure 7
.
Table 11 2 or 4 channel FWS truth table
Procedure 7 Setting up 2 or 4 channel fast wavelength switching
1. In CONTROL, click on the SELECT device icon and set the Operating mode to
Fast Wavelength Switching .
2. Select either the VIS/NIR or NIR/IR crystal.
3. Set the modulation gain in the Setup page to the 0-5 V range (see
“VIS/NIR or
NIR/IR modulation gain” on page 48
.
4. In each of the 4 Profile s, configure channel 1 with a desired wavelength.
When only 2 wavelength switching is required, you can configure channel 1 in
the first two profiles only.
Figure 48
shows channel 1 configured in each of the
4 profiles of a VIR/NIR crystal.
Note: Do not set channels 2 to 7 in the four profiles, leave them OFF.
Pin Value Comment
FSK1 to FSK8 0-3.3 V or TTL
MOD1 to MOD8 0-1 V, 0-5 V, 0-10 V Configured in CONTROL
BLANK 0-3.3 V or TTL
FSK1 Blank Wavelength selected
Low Low Profile 1 Channel 1
High Low Profile 2 Channel 1
Low High Profile 3 Channel 1
High High Profile 4 Channel 1