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How do I adjust the attenuation level on my Singmai SM13 HD-SDI Attenuator?

1Answers
VonEmersyn
12/17/2025, 08:58:01 AM

Adjusting the attenuation level on your Singmai SM13 HD-SDI Attenuator is straightforward. Here's a step-by-step guide:

  1. Understanding the Basics: The SM13 attenuator uses binary-weighted switches to reduce the SDI signal strength up to 32dB, in 1dB increments.
  2. Power On: Connect the SM13 to the provided AC/DC adapter and ensure the power is on.
  3. Initial State: With all switches off, the attenuation is set to 1.0dB (insertion loss).
  4. Increasing Attenuation: To increase attenuation, activate the binary-weighted switches. Each switch corresponds to a specific attenuation value.
  5. Switch Values: Each switch represents a specific attenuation level. For instance, engaging the '16dB' switch results in 17dB of attenuation (16dB plus the 1dB insertion loss).
  6. Combining Attenuation: You can combine multiple switches for cumulative attenuation. For example, activating the '16dB' and '2dB' switches together will yield a total attenuation of 19dB (16dB + 2dB + 1dB).
  7. Real-Time Adjustment: The attenuation level changes instantly when you flip the switches.
  8. Connections: Connect your SDI video source to the 'SDI In' BNC port and monitor the attenuated output from the 'SDI Out' port.
  9. Important Considerations: The SM13 is designed to handle signals up to 2GHz. Ensure the input signal levels and bandwidth are within the specified limits. Following these steps will enable you to accurately adjust the attenuation on your Singmai SM13 HD-SDI Attenuator for your testing needs.
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