Name: THORLABS DC2200
Brand: THORLABS
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DC2200

3.3.3 PWM Mode

PWM stands for Pulse Width Modulation. In PWM mode the DC2200 generates rectangular

pulses with

· adjustable frequency (0.1 Hz to 20 kHz)

· adjustable duty cycle (0.1 % to 99.9 %)

· adjustable pulse count (1 to 1000; infinite)

The pulse amplitude is given by the set value of the LED current, in other words, the LED cur-

rent is modulated by a train of rectangular pulses. The graphics below illustrates the Duty

Cycle parameter:

DC2200 PWM Panel

· Set the LED Current: This will be the current supplied to the LED while it is switched on. It

can be adjusted between 0 and the indicated above LED Current Limit .

· Set the Frequency.

· Set the Duty Cycle.

· Set the number of counts. "Infinite" is set by decreasing below 1.

Note

In PWM Mode, at the SMA MOD IN/OUT connector (4) at the rear panel the internal modula-

tion signal is reproduced as a TTL signal.

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THORLABS DC2200 Specifications

General