NKT Photonics Koheras ADJUSTIK HP, Product Manual

Page: 94 / 115

Connecting modulation signals
94
Connecting modulation signals
Input and output wavelength modulation signals are described in chapter 2:
“Modulation”
. Input modulation signals are connected to the DB-9 pin connector
on th rear panel, see
“Modulation input/output” on page 105
.
Connecting the trigger input or output
The laser includes a trigger logic input/output signal as part of the Modulation
connector (see
Table 18
). The trigger signal can be used to either initiate or
indicate laser emission.
Input trigger
When set as an input a positive active high signal must be applied to the trigger
pin to initiate emission. The diagram
Figure 61
shows the trigger input.
Figure 61 Trigger input circuit
Output trigger
When the trigger feature is set as an output, the trigger pin should be connected
to an external pull-up resistor. The diagram
Figure 62
shows the trigger output
circuit.