Changes

EM.Terrano

23 bytes added, 03:28, 22 July 2018
/* Defining a Point Transmitter Set in the Formal Way */
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Your transmitter in EM.Teranno is indeed more sophisticated than a simple radiator. It consists of a basic "Super-Heterodyne Transmitter Chain" that starts contains a voltage source with a baseband/IF signal series source resistance, and ultimately ends in connected via a segment of transmission line to a transmit antenna, which is used to launch the broadcast signal into the free space. The transmitter's property dialog allows you to define a the basic super-heterodyne transmitter chain. Click the {{key|Transmitter Chain}} button of the Transmitter Set dialog to open the transmitter chain dialog. As shown in the figure below, you can specify the characteristics of the baseband/IF amplifier, mixer and power amplifier (PA) including stage gains and impedance mismatch factors (IMF) as well as the characteristics of the transmission line segment that connects the PA to the antenna. Note that the transmit antenna characteristics are automatically filled using the contents of the imported radiation pattern data file. The transmitter Chain dialog also calculates and reports the "Total Transmitter Chain Gain" based on your input. When you close this dialog and return to the Transmitter Set dialog, you will see the calculated value of the Effective Isotropic Radiated Power (EIRP) of your transmitter in dBm.
{{Note| If you do not modify the default parameters of the transmitter chain, a 50-&Omega; conjugate match condition is assumed and the power delivered to the antenna will be -3dB lower than your specified baseband power.}}
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