Special formula LNBF distance calculate.

Low Noice Block Freqwenzy (LNBF) is the heart of the antenna of satellite . Basically , resonator is a cavity of the satellite signals received from the reflection of focus antenna and processing the signal . Similar to the organ pipe which changed the transmission of energy into electrical signals . A switch state bonds elektonik additional strengthen this signal before being sent to coax cable and turn it into the lower to reduce lost the signals in cable .

To put multiple LNBF C-Band in 1 parabolic antenna is not as difficult as we imagine, there is a table on the create by my friend Axelrose Forsat member.

The point of the calculate the distance between 2 LNBF with LNBF etc is to capture more than 1 satellite in 1 parabolic antenna.

This way is usually used if we did not use motor mover to move the parabolic antenna and will only capture some satellite at any time without changing the direction of the parabolic antenna.

Find out size of a parabolic antenna you first tally to ease its distance and set early satellites for which targets of pointing .
The table below will help you how to determine the distance between the 2 LNB.

    Dish parabolic measurement in centi meters (1 feet = 30,48 cm) :
  • 5 feet = 152,4 cm
  • 6 feet = 182,88 cm
  • 7 feet = 213,36 cm
  • 8 feet = 243,84 cm
  • 9 feet = 274,32 cm
  • 10 feet = 304,80 cm
  • 11 feet = 335,28 cm
  • 12 feet = 365,76 cm
  • 22 feet = 670,56 cm

The language in use in tabular calculations lnbf up using indonesian language. Use translate online for table use of calculations the distance between LNB up here.
And based on experience directly into the trial of a parabolic antenna , the distance that most easy applied to satellites in the range of five degrees , for example the satellite palapa D 113.0°E with telkom 1 108.0°E having a distance of five degrees.


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Update Palapa D 113.0°E - Telkom 1 108.0°E satellite.

Freq. Transp. Satelit Palapa D 113.0°E - Telkom 1 108.0°E

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How to settings spectrum analyser

Spectrum analysers.
Array analysers are just like energy measures in that they clearly display when you complete a satellite tv but they do not tell you the satellite tv identification unless you can acknowledge some of the providers. You really need a set of pre-recorded satellite tv spectrum opinions that are easy to acknowledge. Some health care is necessary as huge TV providers may happen at the same wavelengths on several close by satellite so you need to have unique styles of providers to look for. Satellites with very little visitors or with filter group providers not noticeable with satellite tv identifiers can best be determined with a spectrum analyser. Observe that satellite tv providers come and go, so the alerts noticeable the other day may not be still there these days ! Preferably pre-record the spectrum of that satellite tv that you will be looking for. You will need a provide of DC current and perhaps 22kHz develop. A coupler is useful with one part energy complete. Used the DC prevent part to the analyser. Observe that many $1000's harm may happen if you use DC v to some spectrum analysers.

Settings for spectrum analyser:

  • When looking for the satellite tv, decided configurations that will provide a quick brush amount under 250mS so you can shift the bowl at a affordable amount without losing the satellite tv. Large covers like 40 to 500 MHz to 1 GHz work well for me, but much is determined by what satellite tv spectrum image design you can keep in mind for the satellite tv you want. You may try things out with on-line satellite tv spectrum dimensions.
  • Make sure movie calculating is OFF. Max carry must be OFF also.
  • Possible problems: The LNB may be off regularity by up to 1 MHz; the LNBs has a regional oscillator regularity different from what is predicted (9.75 GHz, 10 GHz, 10.5 GHz, 10.6 GHz, 11.3 GHz etc); you are using the incorrect polarisation.
    Note for Arlington worldwide Ku group LNBs:
    13 v = straight straight range polarisation, 19 v = horizontally straight range polarisation ( represents you have the LNB 'upright' )
    22 kHz OFF = low group LO at 9.75 GHz 22 kHz ON = high group LO at 10.6 GHz.
  • When peaking up, the zero period function with brush set to Thirty a few moments or more and a straight plenitude range set to 1 dB per department, can be very beneficial. If you do this using a shining example use a quality information wide enough to provide any regularity float that may happen in an time or so - otherwise the indication might surprisingly drop gradually.

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