Lemco
HDMOD-Q1 manual v1.0
17
* TS ID must always be different between DVB-T modulators in the same network.
Caution!!!
•
Modulation settings must be applied with care and in order to have adequate
output bitrate. The output bitrate (which can be calculated from the tables in
Appendix B) must be equal or greater than the total sum of the bitrate of the
encoders.
Example:
Assuming we select the following modulation settings:
Modulation:
8K
Constellation:
16-QAM
Code Rate:
5/6
Guard Interval:
1/32
Bandwidth:
8MHz
We have an output bitrate of
20.107 Mbps
according to Appendix B.
This means that encoder's bitrate must be adjusted in such a way that the total bitrate
of the encoder does not exceed the 20.107MBps limit, otherwise artifacts may occur.
For example, one valid selection in case of four encoders would be to set each
encoder bitrate to 5Mbps since: 4 x 5Μbps = 20Mbps < 20.107MBps
4.System Settings
This category depicts information about the system’s settings as follows:
4.1
Status
- Depicts the status of the modulator (Idle or Running)
4.2
FW Version
– Depicts the firmware version of the uP
4.3
SW Version
– Depicts the software version of the DVProbe
4.4
HW Version
– Depicts the hardware version of the HDMOD-Q1
4.5
Serial number
– Depicts the serial number of the device
Buttons
•
By pressing the “Get” button in any sub-category, all the settings of this
category are downloaded from the modulator.
•
By pressing the “Apply” button in any sub-category, all the settings of this
category are uploaded to the modulator.
•
The “Factory Defaults” button sets the modulator’s setting to factory default.
•
The “Reset System” button applies a reset to the modulator.
