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| SatSig Topics Index › LinkStar Forum: VSAT hubs and terminals › Tech Support for Linkstar, iDirect, Comtech 570L |
SatSig topic: Tech Support for Linkstar, iDirect, Comtech 570L(Read 22154 times) |
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Jul 26th, 2007 at 10:25am
Are you facing one of these problems: 1) Installing and pointing the Antenna. 2) Configuring Linkstar, Idirect, Comtech 570L modems. 3) Troubleshooting exisitng sites. 4) Problem with Modem Passwords/ and PIN locks. Please drop me a mail if you need help. Regards; vsatspecialist |
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Aug 20th, 2008 at 7:21am
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Sep 16th, 2008 at 9:05am
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Sep 16th, 2008 at 9:43am
It appears that the addition of the S2 receiver provides an internet access facility in addition to the normal VSAT to VSAT mesh networking of the Linkway terminal. You will need to create a hub teleport site with terrestrial access to the internet. I suggest you contact Viasat. Best regards, Eric. |
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Nov 25th, 2009 at 2:22am
I tried upgrading the firmware of the comtech 570 modem. While doing so, the vipersat function in the modem got wiped out. Now i cannot use vload to upgrade/downgrade the modem. The modem cannot talk to the hub as well. I tried to upload the firmware for the base modem and the ip module using the console. I am however, not able to retrieve the vipersat module. is there any backdoor entry to install the vipersat configuration in the modem? Your answers are highly appreciated |
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Nov 25th, 2009 at 11:01am
The manual says: Important: Base modem firmware can only be loaded via the Ethernet M&C port. Do not use Ethernet traffic port. IP module software can only be loaded via the Ethernet Traffic port. Do not use Ethernet M&C port. Best regards, Eric. |
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Nov 25th, 2009 at 9:30pm
Thanks for your prompt response. Quoting you, "Base modem firmware can only be loaded via the Ethernet M&C port. Do not use Ethernet traffic port. IP module software can only be loaded via the Ethernet Traffic port. Do not use Ethernet M&C port. " I have been using a GUI software(called vload) provided by vendor that allows you to choose the base modem and IP bulk, the rate of upload/download for the firmware, application, configurations. Any Help or insights? Kind regards and thanks in advance |
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Nov 25th, 2009 at 10:46pm
Best regards, Eric. |
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Nov 26th, 2009 at 1:45am
As far as I know, indeed you must be physically connected to the modem in order to upgrade the version...I dont think you can do so using the GUI. But the best idea would be to contact Comtech helpdesk, they are very very helpful and service oriented. |
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Dec 6th, 2009 at 11:15am
We will have ViaSat Linkstar Hub in coming days I need some training manuals or some tech papers regarding Linkstar Hub could you please send me on my email leoboy89@gmail.com |
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Sep 12th, 2010 at 11:53am
Do you possibly have the pinouts for an interface cable between the comtech 570 25pin and a digital V.11 NTU? I.e 15pin V.11 to 25 pin RS.422 Regards Jan |
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Sep 12th, 2010 at 12:36pm
https://www.comtechefdata.com/manuals/mn-modems-pdf/mn-cdm570-570L_r9.pdf (warning about 9 Mbytes) The pin out for the 25 pin data connector is on page 3-4. It has a columns of information referring to EIA-422 mode. Regarding your other end, your 15 pin, I know nothing. See https://www.cisco.com/en/US/docs/routers/access/hardware/notes/marcabl.html for some information about a variety of interfaces. wxw Best regards, Eric. |
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Dec 15th, 2010 at 11:13pm
(am sorry for the lengthy message) Am a new client with an ISP and am not a vsat engineer, am only a user so i may not know all the technicalities. MY modem Linkster S1 modem was very difficult to get a lock on the satellite W3A after the tracking is done and the config parameters seems accurate (Barr 0.0007etc; tx -30). After several calls to my ISP, they seems lost on what to do abt the situation cause they keep telling me they will report the issue to their NOC. in the process, the satellite technician tracking the site burnt the s1 modem. i ended up buying a Linkster S2A modem. The same problem persisted for more than 3-days until we finally got a lock on the satellite. The main problem is, the terminal keep logging out after browsing for a period of 2 hours or 4hours. and when it logs out, it will take ages to lock (say like 5 hours). We re-tracked the dish several times improving on the signal we receive but yet the problem persisted. this has been on for like 2 weeks now. I have changed my LNB thinking its the cause of the problem but to no avail. Av even bought a new 3-watts BUC that i intend to use and replace the current 2-watts BUC tomorrow. Fortunately today (15/12/2010), the modem did not rebooth and it took less time to lock (like 30 mins) It browsed very fast in the morning but towards 12noon till 10pm our closing time, the internet was too slow that it cant even brows on 2 systems (the subscription was for 13-systems). All the Satellite techs i called are tired of my site situation am sure even my ISP (B.Walker) are tired of my calls and to be honest to them, they have been quite attentive to me. Please what do you think is the problem with my site. Help me before i go gagas (my internet subscription is already counting and am not enjoying the service) here is my email in case you may wish to contact me emekachukwuma1@yahoo.com. |
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Dec 16th, 2010 at 7:32am
Can you please tell us what is your dish size, and what is the model of the LNB and BUC you are using? Do you know what SNR or EbNo you get when you are locked? Do you know if your LNB is PLL or DRO? Do you know, from your conversations with the NOC, if the problem is with your Rx or Tx? |
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Dec 16th, 2010 at 8:37am
The Linkstar modem should lock to the receive carrier within a few seconds and stay locked all the time, except during the heaviest of rainfall. By locked, I mean that the RX LED has gone green and the bit error rate is low, say 0.0005 to 0.00001. If the bit error rate is high, say 0.01 to 0.001 then you have a poor receive quality and will lose lock intermittently and during the slightest rain. You say the BER is 0.0007 You say it takes 30 minutes to 5 hours to lock. These two symptoms don't make sense to me. You say the BER is 0.0007 : I would expect immediate lock even as the BER is not particularly good. You say it takes 30 minutes to 5 hours to lock. : I would expect the BER to be very poor 0.01 and intermittent. Faulty connections on the LNB cable should be checked first. Does any waggling of the LNB cable at either end cause loss of lock. If so, fix the connector. Does pushing on the dish in any direction cause loss of lock ? If pushing it in any direction causes the BER to improve (i.e. reduce to say 0.00001), your pointing needs improving, to make the improvement permanent. Take between 10 and 100 BER readings as you adjust the antenna. Typing "repeat tcmp" will save your fingers! I suspect the LNB frequency stability coupled with the tuning frequency. If the LNB drifts too far in frequency error due to temperature change the modem may loose lock. Please check your configuration string that you type in to set up the tuning etc. Make sure that the frequency has been typed in exactly correct. pconf will show what is actually in the modem. e.g. TDMCarrierFreq 1485375 You could try setting the tuning either high or low, e.g 1485675 or 1485075 This would test for 300 kHz up and down. Does one of these make the modem lock up instantly and the other not at all ? Please tell me what is your configuration etc. Example below: pconf termid 0x3119e popid 0x11e0003 ctlPID 0x1029 pcrPID 0x365 TDMCarrierFreq 1485375 SymbolRate 2500000 MaritimeEnabled 0 Latitude 0 Longitude 0 TxPower -30 ODUStatus INTERNAL VCXOPar1 0x0 VCXOPar2 0x0 TimingLoopBW 0x0 Signature 0x0 isEncryptionEnabled 0 isRnccKeyValid 0 isRcstKeyValid 0 PointingTool 0 LNBVoltage 18 LNBVoltageIncrease 0 LNBToneOn 0 DVBMode DVBS2 vcoplan 0 tcmp Standard DVB-S2 Synced 1 BCHCorrectedErrCount 7833154 BCHUncorrectedErrCount 1222 UncodedBER 0.0006137625 I2CErrorCount 0 LostSyncCount 0 TimeSynced 1747 TimeUnSynced 0 MaxTimeSynced 1747 CarrDeviation 0 NCODeviation 0 LdpcBch LOCKED CarrierPhase LOCKED frequency 1485 ModCode 8PSK 3/4 Rs 2.500000 Fs 100 RxPower -39.13000 EsNo 16 Pilot On FrameLength 64800 I've spoken with Bentley Walker for you and they are doing what they can to help. It is possible that there is a transmit issue - it depends on what is meant by "loss of lock". If the RX LED goes out you have lost lock on the receive carrier and there is a receive problem. If you lose connectivity (unable to browse) with the internet, but the RX LED remains on (i.e. the RX remains locked), then the problem may be on the transmit side. Best regards, Eric. |
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Aug 23rd, 2011 at 8:56am
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Dec 13th, 2011 at 3:09pm
TERMEXEC Dec 8 13:52:40 :886 2011 NCR Sync message received from TCL module TERMEXEC Dec 8 13:52:46 :534 2011 Rx Sync Lost TERMEXEC Dec 8 13:52:46 :534 2011 RCST is either unable to RX synchronize, TERMEXEC Dec 8 13:52:46 :534 2011 Or has not been validated by the RNCC. TERMEXEC Dec 8 13:52:46 :534 2011 Trying the next Network Boot Config ... TERMEXEC Dec 8 13:52:46 :534 2011 Installed filter for PID 869 (0x365) TERMEXEC Dec 8 13:52:46 :534 2011 Installed filter for PID 4137 (0x1029) TCM Dec 8 13:52:46 :546 2011 Using VCO PLAN 0 TCL Dec 8 13:53:17 :764 2011 Terminal's lost Rx Sync TCM Dec 8 13:53:46 :774 2011 Using VCO PLAN 2 I really would appreciate any help I can get from you please. |
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Email me:eric@satsig.net |