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6.1 - Modem Setup

Creation date: 10/26/2020 1:33 PM    Updated: 3/21/2023 1:45 PM   odn field services manual odn gen2 modem service manual excerpt
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Modem Setup

Section 6.1 in ODN Field Services Manual)

Physical location:
The modem should be installed in the same rack (or as near as possible) to the equipment it will establish a local connection with. Ideally the modem should be able to establish a physical connection to its LAN hosts with less than 4’ of ethernet cable. The AC power supply of the modem should be plugged into an uninterruptable power supply. RF, power, and ground cabling should be tidy and resemble the protocol already established in the rack. [Figure 6.1.1]

[Figure 6.1.1]

Caution: Both the receive and transmit RF connections provide DC power to the active antenna components. To prevent damage to the modem or electrical shock, only modify RF cable connections while the modem is powered off.

The ODN modem will be provided with most of the relevant parameters pre-programmed. However, some parameters will need to be accessed, setup and verified upon installation, such as Location (in Lat-Long coordinates) and antenna-related variables such as BUC local oscillator frequency.

To access the user interface in the modem:
  1.  With a laptop computer, connect an ethernet cable to one of the satellite modem’s LAN ports or the modem’s LAN switch.
  2.  Make sure the laptop WiFi is turned off.
  3.  Set your computer’s ethernet IP address to 192.168.222.223 – subnet mask 255.255.255.0 
  4.  Open a browser such as Chrome and browse to the default local IP address of the modem, 192.168.222.222 This should open the Overview page of the modem. [Figure 6.1.2]

[Figure 6.1.2]

Enter the Location coordinates:
  1.  On the left side of the page under “Overview”, there will be a “Site Setup” selection. Open the Site Setup. This will take you to a page that displays the previously saved Latitude & Longitude values. [Figure 6.1.3]
  2.  With a GPS-based smartphone app, find the site’s Lat/Lon coordinates in the Imperial Degrees/Minutes/seconds format. The modem does not need the “seconds” resolution, so round up or down to the nearest minute.
  3.  Enter the coordinates the Latitude & Longitude fields. Make sure the “N” and “W” dropdown boxes are also correct.
  4.  Save the new settings by clicking the “Apply” button at the bottom of the page and then the yellow “Save Config” button at the upper left corner of the page.

[Figure 6.1.3]

Verify or enter the proper RX & Transmit L.O. frequency:
  1.  On the same Site Setup page check the L.O. (Local Oscillator) frequency for Rx1 & Transmit. [Figure 6.1.3]
  2. Default Rx1 LO= 10750000 Khz [Varies based on antenna LNB, check model] Change if necessary.
  3.  Default Transmit LO: 13050000 Khz [Varies based on antenna BUC, check model] Change if necessary.
  4. Save the new settings by clicking the “Apply” button at the bottom of the page and then the yellow “Save Config” button at the upper left corner of the page.

Verify or set the proper RX & Transmit power states and 10Mhz signaling:
  1.  On the same Site Setup page verify the power check boxes and 10Mhz signaling for Rx1 & Transmit are set as shown in the picture above. [Figure 6.1.3]
  2. Rx1 / Rx2 Power checkbox should be selected (This sends 18 VDC down the RX cable to power the LNB) The 10Mhz box should NOT be selected.
  3.  Transmit Power checkbox should be selected unless there is the addition of an external power inserter in the TX path. An external power inserter is typically used when the BUC model outputs more than 6 watts of microwave RF. The 10Mhz box should always be selected.
  4.  Save new settings by clicking the “Apply” button at the bottom of the page and then the yellow “Save Config” button at the upper left corner of the page.

Verify or enter current receive (Rx) frequency and symbol rate:
Note: Modem should come shipped with frequency and symbol rate currently in use at the time of shipment. However sometimes ODN frequency plans change during the time the modem was stored or shipped. This step should only be necessary if the modem does not get an Rx lock after connecting the pointed antenna. All subsequent frequency changes will be automatic if the system is online.

      1. From the list on the left side of the page, select “Profiles”. Then click on the valid “Star station” [Figure 6.1.4]

[Figure 6.1.4]

      2.  From Profile page, select “TDM/SCPC RX” [Figure 6.1.5]

[Figure 6.1.5]

      3.On the TDM RX page, [Figure 6.1.6]  the parameters for changing the receive frequency and symbol rate are listed under the “Demodulator 1” section. Verify current RX frequency or change the number in the Frequency (Khz) box to the new frequency. (Those shown in pic below are no longer valid- Frequency info will be provided by ODN)

[Figure 6.1.6]

      4. Verify the current symbol rate or change the number in the SymRate (KSps) box to the new symbol rate.
      5.  To save the settings, click on the “Apply” button below the section. Then click on the “Save Config” button near the upper left corner of the page. If the antenna is pointed, the modem should now be receiving the satellite signal and further changes can be made automatically from the hub.

Final Setup (after antenna and cabling installation)
  1.  Connect station Tx to BUC [Antenna should be checked for good receive signal before connecting TX.
  2.  Select Overview page. [Figure 6.1.7]Interface Demodulator-1 should have a “state: UP” and the C/N value to the right should read at least 11dB.
  3.  Site is ready for antenna peaking, cross-pol & compression test
[Figure 6.1.7]

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