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Pages: 1

Polarisation of HX Universal LNB

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Ex Member
Ex Member


Jul 2nd, 2010 at 10:50am  
Dear All,

Recently, I received HX50 system from Bently Walker, and I'm now to make installation, so I read all the instruction and nothing stopped in my way only the polarisation of the HX Universal LNB (Ku band for 2-way VSAT).

I read some articles here regarding polarisation issue but none of them talked about the new HX universal LNB PN 1501882-0002.

http://www.satsig.net/bentley-walker/hughes-hx-vsat-universal-lnb.htm

I know while looking at the waveguide of the lnb when its broad faces at sides  and the pin on one of them ..it's horizontal Pol. while if they were upwards  and the pin on one of them it's vertical Pol.

Meanwhile, at installation process when I'm looking for East satellite I should tilt the angle of the LNB and BUC anti-clockwise, West clockwise. for North hemisphere.

Now I'm looking for vertical receive pol. pointing for W6 I tilted the angle of LNB 37 deg anticlockwise while facing the satellite (Behind the dish) " based on my GPS location"

Latitude = 30.5190, Longitude = 47.8428
Lat    = 30 degrees,   31.1 minutes   North
Long = 47 degrees,   50.6 minutes   East

My questions are:
1- Shall I set the Pol at first then tilting the angle and then equip them to the "feed horn assy 39", that I already did. because the 505 mark at all times should be at 12 o'clock.

2- I don't have Horizon meter "such as Birdog" can I use the modem Hx50.

3- I can get Horizon meter "Birdog" but it  Eutelsat W6 not in its satellite list, so I go to Birdog website:
http://www.birdog.tv/configure.aspx?page=3

to update its list but there was no W6 on the update list?? how can I use it??
Note BW provides me with CD and it has folder  for site Meter files but I don't know if W6 within them yet.
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Eric Johnston
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Reply #1 - Jul 2nd, 2010 at 12:08pm  
My opinion is as per http://www.satsig.net/bentley-walker/hughes-hx-vsat-universal-lnb.htm
...
As shown, the transmit polarisation, from the BUC on the left, is vertical. There is a clearly visible transmit waveguide.  Assuming this is cross pol OMT, therefore the receive polarisation is Horizontal.  

Assemble the conical horn to the circular flange above,  making sure that the 505 is directly away from the feed support arm, and the fat lump directly towards the feed support arm.

When first assembling the dish, the feed arm will be at the bottom.   Leave the feed yoke rotation alone with the LNB exactly sideways and 505 upwards.

Now you have a perfect Horizontal receive system starting position.   If that is what you want, now apply the +37 deg clockwise polarisation adjustment (as viewed with you standing behind the dish and facing forwards towards the satellite).

On the other hand, if you want a Vertical polarisation starting position. Turn the dish 90 deg either way, using the giant polarisation scale. In your case I suggest anticlockwise.  The feed support arm is now on the right hand side at 3 o'clock. This is true Vertical polarisation.  Now apply the +37 deg amount of clockwise polarisation adjustment (as viewed with you standing behind the dish and facing forwards towards the satellite). Note that it is the amount of +37 deg clockwise adjustment movement that matters. The numbers on the scale may read backwards, ignore them. e.g. starting at 90 turn by an amount of +37 deg to a 53 scale reading.

You can turn the whole dish polarisation all the way round and the beam remains pointed at the satellite while you go through four true polarisation starting positions.

Does that make sense?

-----------

There is a further complication.  A file named "CBC.cfg" needs loading into the modem.  This SBC.cfg file creates the pull down menu where you select the type of LNB.  It creates LNB type menu pull down options with texts like "Pure", "TG_1501882-0002" etc.

You may have been sent more than one .cfg file.
Choose the relevent file and rename it SBC.cfg before loading it.

Yesterday someone in Hughes said that the HX is tuneable from 950 -2150 MHz, but I would like to see this verified.

Best regards, Eric.
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« Last Edit: Jul 5th, 2010 at 3:28pm by Admin1 »  
 
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Reply #2 - Jul 2nd, 2010 at 2:11pm  
Thanks Eric for your reply...

For polarisation issue, I'll try your suggestion for vertical receive pol.

Regarding sbc file, Bently walker provided me with 2 files
one called "SBC-LowBand.cfg", and the second "cfg file 10.0 GHz W6-T11.cfg", and also a file for instructions for how to upload the sbc, they said within instructions that I can skip uploading, and go to Commissioning the HX50.!!

If so I have to do this section, at which stage after I save my configuration and then to commissioning, I think my configuration will be deleted, and what's the point of the second file???

All of that while commissioning process the modem would download software from the server, what it could be

1) SBC-LowBand.cfg

[Acquisition]
AMC6NLV_1070_6k=AMC6NLV-6k,72,W,1070,H,30,0,0,0,0,H,0,3,0
HR2GTN_1250_15k=HR2GTN-15k,74,W,1250,H,30,0,0,0,0,H,0,3,0
HR2GTN_1130_5k=HR2GTN-5k,74,W,1130,H,30,0,0,0,0,H,0,3,0
AMC9NLV_990_2k=AMC9NLV-2K,83,W,990,V,30,0,0,0,0,H,0,3,0
AMC9NLV_1390_22k=AMC9NLV-22K,83,W,1390,V,30,0,0,0,0,H,1,1,0
AMC9NLV_1430_24k=AMC9NLV-24K,83,W,1430,V,30,0,0,0,0,H,1,1,0
AMC3NLV_1070_6k=AMC3NLV-6K,87,W,1070,V,10,0,0,0,0,H,1,1,0
AMC3GTN_1150_10k=AMC3-10K,87,W,1150,V,30,0,0,0,0,H,1,1,0
AMC3NLV_1330_19k=AMC3NLV-19k,87,W,1330,H,30,0,0,0,0,H,0,3,0
G28NLV_1170_11K=G28-11K,89,W,1170,V,30,0,0,0,0,H,1,1,0
G28NLV_1270_16K=G28-16K,89,W,1270,H,30,0,0,0,0,H,0,3,0
G28NLV_1321_19K=G28-19K,89,W,1321,V,15,0,0,0,0,H,0,3,0
G28NLV_1410_23K=G28-23K,89,W,1410,V,30,0,0,0,0,H,1,1,0
G11GTN_0990_2k=G11-2K,91,W,990,V,30,0,0,0,0,H,1,1,0
G11NLV_1050_5k_VerUplink=G11NLV_VerUpLink-5K,91,W,1050,H,30,0,0,0,0,V,1,1,0
G11GTN_1070_6k=G11-6K,91,W,1070,V,30,0,0,0,0,H,1,1,0
G11GTN_1410_23k=G11-23K,91,W,1410,H,30,0,0,0,0,H,0,3,0
G26GTN_1046_4K=G26-4K,93,W,1046,H,45,0,0,0,0,H,1,1,0
G26GTN_1216.5_14k=G26-14K,93,W,1216.5,H,21.5,0,0,0,0,H,0,3,0
G26GTN_1433.5_28k=G26-28K,93,W,1433.5,H,21.5,0,0,0,0,H,0,3,0
G3CGTN_1311_17k=G3C-17K,95,W,1311,V,21.5,0,0,0,0,H,1,1,0
G16GTN_970_1k=G16-1K,99,W,970,H,30,0,0,0,0,H,0,3,0
G16GTN_1210_13k_VerUplink=G16-13K,99,W,1210,H,30,0,0,0,0,V,1,1,0
G16GTN_1230_14k=G16-14K,99,W,1230,V,30,0,0,0,0,H,1,1,0
G16GTN_1350_20k=G16-20K,99,W,1350,V,30,0,0,0,0,H,1,1,0
SM6NLV_1250_15k=SatMex6-15K,113,W,1250,H,33,0,0,0,0,H,0,3,0
SM5GTN_990_2k=SatMex5-2K,117,W,990,V,30,0,0,0,0,H,1,1,0
SM5GTN_1050_5k=SatMex5-5K,117,W,1050,H,33,0,0,0,0,H,0,3,0
SM5GTN_1070_6k=SatMex5-6K,117,W,1070,V,30,0,0,0,0,H,1,1,0
SM5GTN_1170_11k=SatMex5-11K,117,W,1170,H,30,0,0,0,0,H,0,3,0
SM5GTN_1270_16k=SatMex5-16K,117,W,1270,V,30,0,0,0,0,H,1,1,0
G10RGTN_1272_16k_VerUplink=G10R-16K,123,W,1272,H,10,0,0,0,0,V,1,1,0
HR1NLV_1110_8k=Horizons1-8K,127,W,1110,V,30,0,0,0,0,H,0,3,0
HR1GTN_1270_16k=Horizons1-16K,127,W,1270,V,30,0,0,0,0,H,1,1,0
HR1GTN_1390_22k=Horizons1-22K,127,W,1390,V,30,0,0,0,0,H,1,1,0
[Servers]
SAN_and_PIN_Registration=hnsacs2.direcpc.com/webauto/scripts/shannon002
SiteID_Registration=socovar1acs.direcpc.com/webauto/scripts/PRE_enterprise
[TransmitRadioList]
1029258-0001=Chinnon,1,0,0,Ku
1032009-0003=ISIS,1,0,0,Ku
1032009-0004=ISIS,1,0,1,Ku
1032552-0002=ISIS,1,0,0,Ku
1032552-0008=ISIS,1,0,0,Ku
1032552-0014=ISIS,1,0,0,Ku
1032552-0020=ISIS,1,0,0,Ku
1033505-0001=ISIS,2,0,1,Ku
1033506-0002=ISIS,2,0,0,Ku
1033506-0008=ISIS,2,0,0,Ku
1035007-0001=OSIRIS,1,0,1,Ku
1035007-0002=OSIRIS,1,0,1,Ku
1035008-0002=OSIRIS,1,0,1,Ku
1035008-0008=OSIRIS,1,0,1,Ku
1035008-0020=OSIRIS,1,0,1,Ku
1035817-0001=OSIRIS,2,1,1,Ku
1035818-0002=OSIRIS,2,1,1,Ku
1035818-0008=OSIRIS,2,1,1,Ku
1500172-0101=ANUBIS,1,1,1,Ku
1500172-1101=ANUBIS,1,1,1,Ku
1500172-2101=ANUBIS,1,1,1,Ku
1500192-0111=ANUBIS,1,1,1,Ku
1500172-0202=ANUBIS,2,1,1,Ku
1500192-0221=ANUBIS,2,1,1,Ku
1037099-0001=ANUBIS,2,1,1,Ku
[RxLnbList]
TG_1024572-0001=10,10
Pure=10.75,9.75
1500287-0001=10,10
Invacom=10.6,9.75
TG_1024572-0001=10,10
TG_1024572-0002=10.75,10.75
TG_1024572-0003=11.3,11.3
Invacom_bw=10,10,10.7,12.15
[LinearRadioPowerRestrictions]
Radio_1W=0,128;
Radio_2W=0,256;
Radio_4W=0,256;
Radio_5W=0,512;
Radio_8W=0,1024;
[LinearTransmitRadioList]
NJRC_3W_Ku=NJRC,NJT5037,3,Ku,1,0,35,53,24
NJRC_4W_Ku=NJRC,NJT5017,4,Ku,1,0,36,56,24
NJRC_5W_C=NJRC,NJT5669,5,C,1,0,37,58,24
NJRC_8W_Ku=NJRC,NJT5018,8,Ku,1,0,39,59,49
[General]
SessionMsgTimeout=2
UseSecureHttp=1
128KRestriction=0
128KBackdownValue=30
showPowerMsg=1
Platform=DWAY_ALL_DOMESTIC
Version=NAD080808
[Pointing]
VSAT_Zipcode=2153
VSAT_Longitude_Degree=71
VSAT_Longitude_Minute=5
VSAT_Latitude_Degree=42
VSAT_Latitude_Minute=23
VSAT_Longitude_Hem=1
VSAT_Latitude_Hem=2
SAT_Network_Ref_LO=100000
SAT_LO_On=0.00
SAT_LO_Off=0.00
SAT_OTA_Frequency=0
SAT_Longitude_Degree_Aux=99
SAT_Longitude_Hem_Aux=1
SAT_Frequency_Aux=0
SAT_SymbolRate_Aux=0
SAT_LNBCtrl_Aux=0
SAT_Longitude_Degree=113
SAT_Longitude_Hem=1
SAT_Frequency=12500
SAT_SymbolRate=33000000
SAT_LNBCtrl=1
SAT_ViterbiMode=0
SAT_Modulation=0
SAT_DVBMode=3
SAT_ProgNum0=0
SAT_ProgNum1=0
SAT_Rx_LNB_Name=Default






2) [Acquisition]
AMC6NLV_1070_6k=AMC6NLV-6k,72,W,1070,H,30,0,0,0,0,H,0,3,0
HR2GTN_1250_15k=HR2GTN-15k,74,W,1250,H,30,0,0,0,0,H,0,3,0
HR2GTN_1130_5k=HR2GTN-5k,74,W,1130,H,30,0,0,0,0,H,0,3,0
AMC9NLV_990_2k=AMC9NLV-2K,83,W,990,V,30,0,0,0,0,H,0,3,0
AMC9NLV_1390_22k=AMC9NLV-22K,83,W,1390,V,30,0,0,0,0,H,1,1,0
AMC9NLV_1430_24k=AMC9NLV-24K,83,W,1430,V,30,0,0,0,0,H,1,1,0
AMC3NLV_1070_6k=AMC3NLV-6K,87,W,1070,V,10,0,0,0,0,H,1,1,0
AMC3GTN_1150_10k=AMC3-10K,87,W,1150,V,30,0,0,0,0,H,1,1,0
AMC3NLV_1330_19k=AMC3NLV-19k,87,W,1330,H,30,0,0,0,0,H,0,3,0
G28NLV_1170_11K=G28-11K,89,W,1170,V,30,0,0,0,0,H,1,1,0
G28NLV_1270_16K=G28-16K,89,W,1270,H,30,0,0,0,0,H,0,3,0
G28NLV_1321_19K=G28-19K,89,W,1321,V,15,0,0,0,0,H,0,3,0
G28NLV_1410_23K=G28-23K,89,W,1410,V,30,0,0,0,0,H,1,1,0
G11GTN_0990_2k=G11-2K,91,W,990,V,30,0,0,0,0,H,1,1,0
G11NLV_1050_5k_VerUplink=G11NLV_VerUpLink-5K,91,W,1050,H,30,0,0,0,0,V,1,1,0
G11GTN_1070_6k=G11-6K,91,W,1070,V,30,0,0,0,0,H,1,1,0
G11GTN_1410_23k=G11-23K,91,W,1410,H,30,0,0,0,0,H,0,3,0
G26GTN_1046_4K=G26-4K,93,W,1046,H,45,0,0,0,0,H,1,1,0
G26GTN_1216.5_14k=G26-14K,93,W,1216.5,H,21.5,0,0,0,0,H,0,3,0
G26GTN_1433.5_28k=G26-28K,93,W,1433.5,H,21.5,0,0,0,0,H,0,3,0
G3CGTN_1311_17k=G3C-17K,95,W,1311,V,21.5,0,0,0,0,H,1,1,0
G16GTN_970_1k=G16-1K,99,W,970,H,30,0,0,0,0,H,0,3,0
G16GTN_1210_13k_VerUplink=G16-13K,99,W,1210,H,30,0,0,0,0,V,1,1,0
G16GTN_1230_14k=G16-14K,99,W,1230,V,30,0,0,0,0,H,1,1,0
G16GTN_1350_20k=G16-20K,99,W,1350,V,30,0,0,0,0,H,1,1,0
SM6NLV_1250_15k=SatMex6-15K,113,W,1250,H,33,0,0,0,0,H,0,3,0
SM5GTN_990_2k=SatMex5-2K,117,W,990,V,30,0,0,0,0,H,1,1,0
SM5GTN_1050_5k=SatMex5-5K,117,W,1050,H,33,0,0,0,0,H,0,3,0
SM5GTN_1070_6k=SatMex5-6K,117,W,1070,V,30,0,0,0,0,H,1,1,0
SM5GTN_1170_11k=SatMex5-11K,117,W,1170,H,30,0,0,0,0,H,0,3,0
SM5GTN_1270_16k=SatMex5-16K,117,W,1270,V,30,0,0,0,0,H,1,1,0
G10RGTN_1272_16k_VerUplink=G10R-16K,123,W,1272,H,10,0,0,0,0,V,1,1,0
HR1NLV_1110_8k=Horizons1-8K,127,W,1110,V,30,0,0,0,0,H,0,3,0
HR1GTN_1270_16k=Horizons1-16K,127,W,1270,V,30,0,0,0,0,H,1,1,0
HR1GTN_1390_22k=Horizons1-22K,127,W,1390,V,30,0,0,0,0,H,1,1,0
[Servers]
SAN_and_PIN_Registration=hnsacs2.direcpc.com/webauto/scripts/shannon002
SiteID_Registration=socovar1acs.direcpc.com/webauto/scripts/PRE_enterprise
[TransmitRadioList]
1029258-0001=Chinnon,1,0,0,Ku
1032009-0003=ISIS,1,0,0,Ku
1032009-0004=ISIS,1,0,1,Ku
1032552-0002=ISIS,1,0,0,Ku
1032552-0008=ISIS,1,0,0,Ku
1032552-0014=ISIS,1,0,0,Ku
1032552-0020=ISIS,1,0,0,Ku
1033505-0001=ISIS,2,0,1,Ku
1033506-0002=ISIS,2,0,0,Ku
1033506-0008=ISIS,2,0,0,Ku
1035007-0001=OSIRIS,1,0,1,Ku
1035007-0002=OSIRIS,1,0,1,Ku
1035008-0002=OSIRIS,1,0,1,Ku
1035008-0008=OSIRIS,1,0,1,Ku
1035008-0020=OSIRIS,1,0,1,Ku
1035817-0001=OSIRIS,2,1,1,Ku
1035818-0002=OSIRIS,2,1,1,Ku
1035818-0008=OSIRIS,2,1,1,Ku
1500172-0101=ANUBIS,1,1,1,Ku
1500172-1101=ANUBIS,1,1,1,Ku
1500172-2101=ANUBIS,1,1,1,Ku
1500192-0111=ANUBIS,1,1,1,Ku
1500172-0202=ANUBIS,2,1,1,Ku
1500192-0221=ANUBIS,2,1,1,Ku
1037099-0001=ANUBIS,2,1,1,Ku
[RxLnbList]
Default=10.0,10.0
Pure=10.75,9.75
Invacom=10.6,9.75
TG_1024572-0001=10,10
TG_1024572-0002=10.75,10.75
TG_1024572-0003=11.3,11.3
[LinearRadioPowerRestrictions]
Radio_1W=0,128;
Radio_2W=0,256;
Radio_4W=0,256;
Radio_5W=0,512;
Radio_8W=0,1024;
[LinearTransmitRadioList]
NJRC_4W_Ku=NJRC,NJT5017,4,Ku,1,0,36,56,24
NJRC_5W_C=NJRC,NJT5669,5,C,1,0,37,58,24
NJRC_8W_Ku=NJRC,NJT5018,8,Ku,1,0,39,59,49
[General]
SessionMsgTimeout=2
UseSecureHttp=1
128KRestriction=0
128KBackdownValue=30
showPowerMsg=1
Platform=DWAY_ALL_DOMESTIC
Version=NAD080808
[Pointing]
SAT_OTA_Frequency=0
SAT_Rx_LNB_Name=Default
SAT_LO_On=10.00
SAT_LO_Off=10.00
SAT_Network_Ref_LO=100000





LNB goes to default Name, and LO 10.00 for W6, and 113000 for  W3AAfrica-Sesat2, and 97500 for europe W7
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Reply #3 - Jul 2nd, 2010 at 2:29pm  
That's the SBC file for North American HughesNet modems. Version=NAD080808 represents North American Direcway as of August 8th 2008. Note further that the list only includes satellites located between 72W and 127W.

You describe your system as a HX50, but perhaps you'd verify. What model number is printed on your IDU (modem) nameplate?

//greg//
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Reply #4 - Jul 2nd, 2010 at 4:02pm  
I've copied from file  "cfg file 10.0 GHz W6-T11.cfg",

[RxLnbList]
Default=10.0,10.0
Pure=10.75,9.75
Invacom=10.6,9.75
TG_1024572-0001=10,10
TG_1024572-0002=10.75,10.75
TG_1024572-0003=11.3,11.3

Remember file name  "cfg file 10.0 GHz W6-T11.cfg"  needs renaming "SBC.cfg" before loading.

As soon as someone has HX W6 with Universal LNB working, please explain what you have done.

Greg: in the US is it possible to type in the actual satellite frequency (e.g. 113728, meaning 11.3728GHz) into the tuning box and allow the modem to calculate its own L band frequency.  

Best regards, Eric.
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« Last Edit: Jul 5th, 2010 at 3:32pm by Admin1 »  
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Reply #5 - Jul 2nd, 2010 at 9:10pm  
Quote:
Greg: in the US is it possible to type in the actual satellite frequency (e.g. 113728, meaning 11.3728GHz) into the tuning box and allow the modem to calculate its own L band frequency.
Nope. User input relative to the assigned satellite is limited to satellite longitude and transponder (intermediate) frequency. RF (down) less 10.75GHz typically equates to the IF of both transponder and cable. Reason for that is, all Ku-band transponder space leased by Hughes (to support consumer grade customers) uses the same 10.75GHz LOF. Within that grade of service, transponder freq and cable (IF) freq here - are essentially one in the same; typically 970MHz to 1420MHz.

Makes it a lot easier to  mass produce and distribute standardized consumer hardware.

//greg//
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Reply #6 - Jul 2nd, 2010 at 10:28pm  
Thanks greg

We have a rather more complex situation with satellite frequencies from 10.7 to 12.75 GHz.

So far, LNB local oscillator frequencies reported are:
10.0 for W6 (old fixed LNBs NJR2784H)
9.75 for W6 (new Universal)
9.75 for T11
11.3 for  W3A Africa Sesat2
9.75 for europe W7
etc

Helpfully someone in Hughes said yesterday that the HX modem works from 950 - 2150 MHz.

The new Universal LNB (thought to have switchable LO=9.75 and 10.75) looks good to cover the whole range. These LO frequencies and which corresponds to tone=ON has not been verified.

Best regards, Eric.
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« Last Edit: Jul 5th, 2010 at 3:24pm by Admin1 »  
 
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Reply #7 - Jul 3rd, 2010 at 11:53am  
I've found this installation guide download from iWay Africa: Hughes Universal LNB installation guide (401k pdf file)

Note is says UNIVERSAL LOs are 9.75 and 10.6 GHz
It also suggests the modem decides for itself what LO to select based on you inputting a frequency above or below 11.7 GHz.

This is the download sbc file (3k text file) which contains:
[RxLnbList]
AFSAT_NSS7=10,10
AFSAT_IS10=11.3,11.3
AFSAT_UNIVERSAL=10.6,9.75
Pure=10.75,9.75
Invacom=10.6,9.75
TG_1024572-0001=10,10
TG_1024572-0002=10.75,10.75

Note the UNIVERSAL in bold above.

Best regards, Eric.
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Reply #8 - Jul 5th, 2010 at 6:49am  
Quote:
That's the SBC file for North American HughesNet modems. Version=NAD080808 represents North American Direcway as of August 8th 2008. Note further that the list only includes satellites located between 72W and 127W.

You describe your system as a HX50, but perhaps you'd verify. What model number is printed on your IDU (modem) nameplate?

//greg//


Yep, I agree with you it's for North America, but Bentley Walker sent me those configuration with the modem type HX50.

What should I do?? should I contact Bentley Walker for this issue.. well, I'll do sooner or later.
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Reply #9 - Jul 5th, 2010 at 7:15am  
Dear Eric,

Thanks for this helpful document.

Yesterday, I started dish alignment after having input the configuration, I did not see UNIVERSAL option in LNB type box.

So, I chose the default option, but now I'm a little confused as Bentley Walker sent me HX50 installation guide that don't even have LNB type box, since I uploaded the sbc file configuration at the moment I received the file and did not check its content at that moment.


Can I return to factory default configuration!!

By the way, when I've input my configuration and started dish pointing without using Horizon menter, I got 29 signal strength, I checked the cable connection and the configuration I got input, but I know it's because the LNB...

Today, I should finish this whole issue and start browsing the Internet.


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Reply #10 - Jul 5th, 2010 at 9:32am  
The only thing I am certain about is the polarisation setting and adjustment.

First ask what is the polarisation name you should be receiving.

Follow my advice in 2nd posting above.

---

Regarding modem configuration

Set the modem tuning to the satellite frequency minus LNB local oscillator frequency.

e.g. Modem (100kHz units) = 12345 = 11.2345 GHz - 10.0 GHz
This example assumes an NJR2184 LNB with a fixed 10 GHz LO.

e.g. Modem (100kHz units) = 14845 = 11.2345 GHz - 9.75 GHz
This example assumes a switchable LNB with 9.75 and 10.6 GHz LO and the 9.75 option selected with tone ON/OFF.

Set the LNB to high or low LO using whatever pull down menu works. The Tone ON/OFF menu may also change the tone, if the LNB pull down menu and the SBC.cfg file does not override it.

All this requires that you know in advance what is the actual satellite downlink frequency.  Ask.

It is no good having a modem tuning frequency if you don't know what LNB local oscillator frequency goes with it.

Best regards, Eric.
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Reply #11 - Jul 5th, 2010 at 12:57pm  
Well, Eric.. thanks for your support..
I already worked with your advice for vertical name receive polarisation, I turned whole dish anticlockwise for 90 degree then applied required polarisation for 37 deg by turning it clockwise, now the scale is pointing for 53 deg (90-37). and making sure that the 505 is directly away from the feed support arm, and the fat lump directly towards the feed support arm.

---
W6
Satellite Parameters
Satellite Longitude 21 Degress East
Satellite Frequency 13742
Symbol Rate 14000000
LNB 22KHz Switch On
DVB Mode DVB S2 ACM
Frequency Band KU/QPSK
Receive Pol Vertical
Transmit Pol Horizontal

I should make it work today, and I'll inform you.
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Reply #12 - Jul 5th, 2010 at 2:11pm  
On 4 June it was intended to change to the freq and symbol rate below - but the change was deferred.

If the change has actually occurred then it would be worth trying:
Modem frequency = 13728
Symbol rate 16000000

The appropriate xxxxxxxxx.cfg file needs renaming SBC.cfg before loading.

Please re-read my above positings.  I am progressively deleting anything confusing.  Once it works I will delete everything except the minimum details necessary to get it right first time.

Best regards, Eric.
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