antenna terminals การใช้

• And so receiver inputs cannot simply be bridged across transmitting antenna terminals!
• Or equivalently, in terms of the rms voltage " V " at the antenna terminals:
• A once common application of a radio frequency balun was found at the antenna terminals of a television receiver.
• To cancel the capacitive reactance, an inductance, called a loading coil, is inserted in between the feedline and the antenna terminal.
• On VHF and UHF receivers used for weak signal communications, S9 often corresponds to 5 ?V at the antenna terminal 50 ohms.
• The dipole can be properly fed, and retain its expected characteristics, by using a balun in between the coaxial feedline and the antenna terminals.
• You'll need a radio that has connectors for an external antenna ( almost every stereo receiver has both AM and FM antenna terminals ).
• But, before we are done, I'll also tell you a tiny trick that also may help the reception for a radio without antenna terminals.
• We'll start with the easiest way to improve your reception for FM . Simply buy an old-fashioned television rabbit ear antenna and connect it to the FM antenna terminals.
• Then the signal at the radio's antenna terminal or first RF input stage is affected by the type and orientation of the antenna, or the " gain " of the antenna.
• Some computers came with a built-in RF modulator to allow connection to the TV receiver antenna terminals; others output composite video for use with a free-standing monitor or external RF modulator.
• How much of that power has actually been radiated cannot be directly determined through electrical measurements at ( or before ) the antenna terminals, but would require ( for instance ) careful measurement of field strength.
• Antenna tuning generally refers to cancellation of any reactance seen at the antenna terminals, leaving only a resistive impedance which might or might not be exactly the desired impedance ( that of the transmission line ).
• You could start with an audio signal in the final audio stage and work backward to the preamp stage, then inject a modulated radio frequency signal in the RF stages, working back to the antenna terminals.
• Selecting an inductance with the same reactance as the ( negative ) capacitative reactance seen at the antenna terminal, cancels that capacitance, and the " antenna system " ( antenna and coil ) will again be resonant.
• A shortwave band receiver or AM receiver might benefit from a longer antenna if you have a way to attach it to the appropriate antenna terminal . talk ) 20 : 22, 5 January 2008 ( UTC)
• Both Antenna Terminals and all three Launchers were isolated with double door Blast Locks to ensure that if there was an explosion or the site was under attack, that only the exposed antenna and / or missile silo would be damaged.
• So, whether you're trying to pull in a shortwave station from a station in Beirut or just listen to the Braves on your broadcast radio, consider draping a short length of wire out the window and connecting it to the antenna terminal on your radio.