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BSS-Streaming Service
Advice for use
HDMI
Since the introduction of this standard, HDMI cables have been available in different ver-
sions, currently up to version 2.1. These differ technically, among other things, in the maxi-
mum transferrable data rate, the image resolution and frequency, the sound transmission
and the color space formats.
All HDMI cables used in the BSS Case for Rodecaster Video are at least HDMI specification
2.0 compliant. This corresponds to a maximum image resolution of 4k 60Hz. Since the
Rodecaster Video can process a maximum of 1080p 60Hz signals, there are enough re-
serves.
HDMI is a digital data transmission. In contrast to analog signal transmissions, in which the
signal gradually loses level over the length of the transmission path, this is either available
in full quality or fails completely. Therefore, please note the following information for trou-
ble-free operation.
What to do if no signal arrives at Rodecaster Video?
Differences Between the HDMI Inputs
On some video mixers, HDMI Input 1 is a so-called "low-latency" input.
Use this input for all HDMI connections with cable lengths over 5 meters or when signals
connected to inputs 2–4 are not being received correctly. Reliable signal transmission via
HDMI depends on several factors:Specification and quality of HDMI cables
• Use only HDMI cables with specification 2.0 or better. These are also commercially avail-
able under the name "HDMI Premium High Speed".
• Use cables that are as short as possible.
• With cable lengths >5m, the shielding and the cable structure are very important. Only
use multiple (triple) shielded, high-quality cables.
• Wherever possible, avoid cable lengths of 10m or more. Alternatively, use active signal
converters on SDI, CAT5, fiber optics or similar transmission variants that allow longer
cable routes due to their specification. HDMI cables with a signal repeater can also
work, but should be tested with the signal source and receiver (Rodecaster Video).
Signal source
A key factor is the signal source itself. Depending on the device, a particular cable may
work perfectly with one source, but fail to function correctly with another—even on the
same HDMI input of the Rodecaster Video.
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Operating instruction EN
This depends on factors such as the signal level output by the source device and how
much signal loss or attenuation occurs when combined with the specific cable used.
In our experience, high-quality, well-shielded cables often ensure stable performance,
even with sources that deliver a lower signal level.
However, we strongly recommend testing each setup in advance to ensure reliable op-
eration.
Compatible parameters
Normally, active HDMI devices agree on compatible parameters in a data exchange be-
fore they start transmitting. In the case of the Rodecaster Video this means a maximum
resolution of 1080p 60Hz, 8-12 bit color depth, and RGB 4:2:2 or YUV 4:4:4 color subsam-
pling.
However, individual devices such as (professional) video cameras or (SDI) signal convert-
ers can or do output a fixed, pre-parameterized signal. If this is not compatible with the
specifications of the Rodecaster Video (e.g. 4k), there will be no signal or image flicker-
ing on this input regardless of the cables used (a stable connection will not be estab-
lished ) out of!
Therefore, please set the output parameters of your signal source to match the specifi-
cations of Rodecaster Video's HDMI inputs.
Signal receiver
Not every receiver of an HDMI signal has the same input sensitivity. One device can es-
tablish a secure signal connection with the appropriate source-cable combination, an-
other not. In our case, however, when operating with the Rodecaster Video, this ques-
tion is obsolete. Here we have to live with what RØDE has developed and installed on
components.
Conclusion
In all our tests with corresponding cables from different manufacturers, in different ca-
ble lengths (0.3 m - 10 m), on different sources, with different Video mixers and with the
corresponding HDMI test device (signal generator), we came to the following result
reached:
Using high-quality HDMI cables (version 2.0 with solid triple shielding) and the correct,
compatible transmission parameters, all tested sources delivered signals reliably via the
BSS Case to the video mixer. Only with one lower-cost 10-meter cable did we observe a
signal dropout. It made no difference whether the cable was connected through the
BSS Case or directly to the video mixer.
As an alternative, a high-quality 10-meter HDMI cable ensured stable signal transmis-
sion with all tested sources without any issues.
DOC-000063
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