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Use SCAN Command to Sweep the Laser Output Current Rev B. Revised Oct 2012 Figure1 Output current with the SCAN function For LDC500 series laser diode controllers, the output current shown in Figure.1. CH2 (red trace) SCAN command can be used to initiate an automated shows the laser current output starting from 25mA, sweep of the laser operating point. For example, in then 125mA, through 325mA in 3 steps. The time Constant Current mode, we set initial laser current interval of each step is 50ms. CH1 (blue race) shows at 25mA and turn laser output ON. Through remote the 10s negativegoing TTL synchronizing pulses at interface, RS232, GPIB or Ethernet, we send SYNC OUT BNC connector on the rear panel. command SCAN 100, 3, 50. We'll get a stairup Figure 2 SCAN function parameters Stanford Research Systems www.thinksrs.com (408)7449040 1 As shown in Figure 2 the sync pulses delay can be receipt of the SCAN command, starting at the changed by the command: previous setpoint. SYND gsync ; The second parameter, i, gives the total number of steps. Note that if I0 + i