Heterodyne

A boost converter (English upconverter or else block Uponverter or BUC) is in communication engineering is part of the chain of transmission ( transmitter ) of the light emitted by the modulator signal in satellite technology usually at 70 or 140 MHz ( or even in the L - band ) is, converts to the final transmit frequency.

This may be, for example, the Ku-band ( 12-180 GHz). The signal chain looks like this:

Video signal ( SDI) → Encoder ( ASI) → Multiplexer (DVB -ASI ) → modulator (70 MHz) → step-up converter (eg, 14.3 GHz) → High Power Amplifier (HPA ) → antenna

Boost converter are to be regarded as a counterpart to the low-noise signal converter (LNB of English Low Noise Block Converter ). How have these selbriger a corresponding oscillator (LO of English Local Oscillator ) on which then the frequency signal is mixed up.

In addition to the use in the signal feed ( satellite signal feed or SNG) an up-converter for realizing an uplink of image and data or bi -directional Internet access via satellite is. In Europe, use, inter alia, SES Broadband for the service Astra2Connect ( The boost converter and LNB are in a housing as so-called interactive LNB with the marketing name: summarized iLNB, and use the Ku band ) and Eutelsat tooway for Internet access service, which means KA- SAT in the eponymous Ka - band is performed. ( In the latter, a Ka-band LNB and a Ka-band upconverter means of a flange to a common feed horn is mechanically coupled ).

Professional upconverter to generate the oscillator clock as a multiple of a reference clock that is externally supplied. The signal -to-noise ratio is represented as a function of frequency accuracy ( in: Hz steps ) specified. Appropriate End-User Computing (eg in satellite modems ) allow here ( requires authorization and to protect against misconfiguration ) no settings are fixed so as with most LNBs in production.