User`s guide

User’s Guide · IPS – IPT – IPQ – IPLanTVManager
- 25 - IPS – IPT – IPQ – IPLanTVManager Version_en_1.0 FTE maximal
2.4.4. Start and stop a streaming service
In order to start a streaming service is necessary to select it and click on either the icon
or the menu option “Stm
Services/Start Streaming Service”. If the communication between application and device has been successful and the
streaming service has been started, its status will change to “Running" in green color.
In order to stop a streaming service is necessary to select it and click on either the icon
or the menu option “Stm
Services/Stop Streaming Service”. If the streaming service has been stopped, its status will change to “Stop" in red color.
2.4.5. Configuration of DVB-S/DVB-S2 devices sharing the same antenna
This subject only applies to DVB-S / DVB-S2 devices that are sharing the same LNB, that is, the same cable from the
antenna: LNB has to be supplied only by a device. The device that supplies LNB is configured as MASTER, whereas the
rest of the devices are configured as SLAVE. In the boards list (Device Manager tab), firstly is the MASTER device
followed by the SLAVE devices associated. If there is a SLAVE device associated to a MASTER device not present in the
list, this will appear with the status SLAVE??? in red color.
We RECOMMEND to configure the group of devices MASTER – SLAVEs, being connected simultaneously to the
network, and configure firstly the MASTER device, and afterwards the SLAVE ones.
The configuration of the MASTER is made normally following the steps previously explained. Once the MASTER device is
configured, we proceed with the rest of the devices configured as SLAVE, taking into account that it is only possible to do
automatic/manual searches or configure services in transponders at the same band and with the same polarization that
the transponder tuned in the MASTER device.
For a better explanation, we are going to analyze a practical example, putting special emphasis on one of the
configuration parameters of the LNB (LNB Switch): We have three devices with no previous configuration and sharing an
universal LNB of an antenna pointing to ASTRA satellite. We want to configure the devices with streaming services in the
following transponders:
- Freq: 11.568 MHz Pol: V ( RAI Uno, ARTE )
- Freq: 11.597 MHz Pol: V ( BBC, CNBC )
- Freq: 11.686 MHz Pol: V ( TVC, TV Galicia )
In an universal LNB, we present the following parameters and their default values:
- LNB Low Frequency (MHz) = 9,750 (local oscillator for lower band)
- LNB High Frequency (MHz) = 10,600 (local oscillator for higher band)
- LNB Switch Frequency (MHz) = 11,600
The tuner of the device presents a frequency range 0.95-2.15 GHz and using an universal LNB, the Ku band (10.7 –
12.75 GHz) is completely covered:
- Lower band: 10.70 to 11.9 GHz (9.75+0.95) to (9.75+2.15)
- Higher band: 11.55 to 12.75 GHz (10.6+0.95) to (10.6+2.15)
The parameter “LNB Switch Frequency” fixes the limit between using the lower or higher local oscillator of the LNB.
As we have said before, the transponders tuned by different devices that share the same LNB, must be at the same band
and present the same polarization. The three transponders present the same polarization, but according to the LNB
parameters, the first two are at the LOW band and the third at the HIGH one. In order to get along the three transponders,
we can take advantage of the certain flexibility that LNB Switch parameter presents: it can be slightly modified to 11.700
MHz in a board, so the three transponders are now at the same band (LOW). The configuration would be:
- IPS 310 1: RAI Uno, ARTE. MASTER
- IPS 310 2: BBC, CNBC. SLAVE
- IPS 310 3: TVC, TV Galicia. SLAVE y LNB Switch 11.700 MHz
The flexibility for the “LNB Switch” parameter depends on the value of the LNB local oscillators. For an universal LNB, the
LNB Switch Frequency will be in the range 11.55 - 11.9 GHz.