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SapphireTX Camera Back User Manual
To encode 4 HD services simultaneously see the section entitled Quad Mode. To encode a
single HD service set the parameters as follows.
VIDEO FORMAT: The Video Format must match the video source eg. 1080p50
FREQUENCY: The frequency must match the frequency set at the receiver
RF OUTPUT: Must be set to ON
RF POWER: Must be sufficient to transmit to the receiver typically this is set to 100mW
MODULATION: Must be set to match the receiver typically this is set to DVBT
BANDWIDTH: Must be set to match the receiver typically this is set to 8MHz
CONSTELLATION and FEC: Must be set to match the receiver and also to give sufficient
bitrate for the video being encoded, for UHD this might be 16QAM FEC2/3
PIDS: All the PIDs (video, Audio, PRC and PMT) should match between the SapphireTX
Transmitter and decoder. The decoder does have an auto service mode to simplify this
process.
Front Panel Status Indicators
Status data is presented on the front panel screen of the SapphireTX Transmitter.
The front panel screen has two key status indicators.
Video Lock
Video Lock status is available from the Status Screen. To achieve video lock, a suitable
video signal should be connected to the video input connectors and the correct video format
and sample format should be selected by the user.
Battery Voltage
Battery voltage allows the operator to monitor the voltage status of the battery and change
the battery before this becomes too low.
Changing Video Format UHD and HD
The switch between Mode 1 (4K Ultra HD Mode) and Mode 2 (HD Mode), is achieved using
the VIDEO FORMAT command from the configuration menus. The selected VIDEO
FORMAT must match the video format supplied at the inputs to the SapphireTX Transmitter.
Ultra Low Delay vs. Low Delay and Normal Delay
The SapphireTX Transmitter has three styles of encoding, Ultra Low Delay, Low Delay and
Normal Delay. In Ultra Low Delay the encoder is optimised to minimise end to end video
