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Thread: 0-5V 10Khz Analog Modulation?

  1. #1
    Join Date
    Aug 2007
    Location
    Indianapolis, IN
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    196

    Default 0-5V 10Khz Analog Modulation?

    I've never worked with analog modulation before - only TTL "blanking".

    I recently received a laser that had an analog modulation connector that was marked 0-5v 10Khz - is this PWM? I always thought analog was truly analog.

    The TTL port is marked at 30Khz, so I'm not entirely sure how this works.

    I've written to the manufacturer (China) but not received a response yet.

    Steve
    ---------------
    Steve's Website

  2. #2
    Join Date
    Jun 2010
    Location
    Australia
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    3,729

    Default

    No, the analog modulation port is most likely analog, true analog, not PWM.

    It will accept an input from 0V to 5V with a response of 10kHz. Fully proportional, although linearity may be questionable...
    This space for rent.

  3. #3
    Join Date
    Dec 2006
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    Essex, UK
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    8,616

    Default

    ah the man i tried to contact not so long ago about a laser harp.

    do you not pick emails up via your web site?
    Eat Sleep Lase Repeat


    Aluminium Optic Mounts

    http://www.laser-man.co.uk/opticmounts/

  4. #4
    Join Date
    Jan 2008
    Location
    Stockholm, Sweden
    Posts
    799

    Default

    It is analog, not PWM. The specified frequency is how fast it can be modulated. However, as you'll see if you monitor the output with a photodiode and oscilloscope the number given by chinese manufacturers is definitely not an absolute truth. Just like their Mē values, they don't actually measure this, so take the specifications with a grain of salt.

  5. #5
    Join Date
    Aug 2007
    Location
    Indianapolis, IN
    Posts
    196

    Default

    Thanks for the response - that's what I thought.

    Emails via the website - I try very hard to, but sometimes things get lost...

    What was your question (hijacking my own thread)

    Steve
    ---------------
    Steve's Website

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