OPERATION
Configuring the LDM-4990
8 LDM-4990
CHAPTER 2
Configuring the LDM-4990
The LDM-4990, as shipped from the factory, is not configured for any laser.
Therefore, the mount must be configured for your particular laser before
operation.
There is no real standard for pin numbering of these devices; most three pin devices are
similar if not identical, however, some four-pin devices are numbered opposite. Because
of this, use caution when configuring the 4990 as the pin numbers shown on the diode
mounting plate are arbitrary and may not correspond with the pin number on the diode's
data sheet.
To configure the 4990 for a particular laser package, open the access cover to
access the bank of configuration switches. There are 16 total switches as shown
in Figure 2.4, divided up between four laser package functions, i.e., LD + (anode),
LD- (cathode), PD+(anode), PD- (cathode). Any laser package function can be
assigned to switch 1 through 4 (S1 - S4), which corresponds to the number as
labeled on the diode mounting plate (and do not correspond with the laser diode
package pin-out).
Figure 2.4 Configuration Switch Labels
