
To adjust the attenuation level on your Singmai SM13 HD-SDI Attenuator, follow these straightforward steps. First, ensure the SM13 is powered on using the provided AC/DC adapter. The Singmai SM13 uses binary-weighted switches to control attenuation, allowing for adjustments up to 32dB in 1dB increments. When all switches are off, the default attenuation is 1.0dB, representing the insertion loss. To increase attenuation, activate the corresponding switches. Each switch corresponds to a specific attenuation value. For example, engaging the '16dB' switch adds 16dB of attenuation, resulting in a total of 17dB (including the 1dB insertion loss). You can combine multiple switches to achieve the desired attenuation level. For instance, activating both the '16dB' and '2dB' switches provides a total attenuation of 19dB (16dB + 2dB + 1dB insertion loss). The switches take effect immediately, adjusting the signal attenuation accordingly. Connect your SDI video source to the 'SDI In' BNC port and monitor the attenuated output from the 'SDI Out' port. Keep in mind that the SM13 is designed to attenuate signals up to 2GHz in bandwidth, and the applied RF signal should adhere to the specified input levels and bandwidth to ensure optimal performance.


