Atlona Help Center

KB01064 - No video output when connecting Atlona HDBaseT products with some older models of Scientific Atlanta (Cisco) cable boxes

Date issued: 04/03/13

SKU Affected: SKUs: AT-UHD-EX-70-2PS, AT-UHD-EX-70-KIT, AT-UHD-EX-70C-KIT, AT-UHD-EX-100CE-KIT, AT-UHD-EX-100CEA-KIT, AT-UHD-EX-70-RX, AT-UHD-EX-70C-RX, AT-UHD-EX-100CE-RX, AT-UHD-EX-100CE-RX-PSK, AT-HDTX, AT-HDRX, AT-HDTX-IR, AT-HDRX-IR, AT-HDTX-RSNET, AT-HDRX-RSNET

Dear Valued Customers: We would like to inform you that there is a slight chance you might be having an issue when connecting some of the CISCO cable boxes under the flagship of Scientific Atlanta with HDBaseT Transmitter including our own. Although we can’t be 100% certain of the root cause, we believe the issue might be due to lack of clock stretching implementation. HDMI 1.3 and above requires mandatory clock stretching implementation thus these versions would be a non-issue.

The Symptom:

No video output and on the display and you will receive the following message: “HDCP error…switch to component”

Below is a list of the cable box that are affected:

  • Scientific Atlanta 4250HD
  • Scientific Atlanta 8300HD
  • Scientific Atlanta 8600
  • Scientific Atlanta (Cisco) RNG-150

There are two workarounds to resolve the issue:

  1. Contact your cable provider to get your older box upgraded to a newer model that supports clock stretching. This should be free
  2. Installing an AT-ETU-SYNC or AT-UHD-SYNC between the output of the cable box and before the input of the extenders should help resolve the issue. The AT-UHD-SYNC and AT-ETU-SYNC are capable of reclocking the signal from the cable box and restoring functionality with HDBaseT devices. The SYNC unit will need to be left installed to correct the issue. 

Please feel free to contact our Technical Support at support@Atlona.com for the workaround

Article ID: KB01064

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