Medium Transmitter Model

The Medium Transmitter provides more flexibility by letting you specify gain and power separately instead of entering their product (EIRP) directly, as in the Simple model. The following parameters can be set for the Medium model:

Model Specs
Modulator
Filter
Additional Gains and Losses

Model Specs

Frequency. The RF carrier frequency of the transmitter.

Power. The RF power output of the transmitter as measured at the input to the antenna.

Gain. The transmitter antenna's isotropic gain.

Polarization. To specify a polarization model, select Use and select a polarization type. For descriptions of the polarization parameters, see Polarization.

Modulator

STK Communications allows you to select from a number of modulators, including user-defined modulators. STK Modulators can be separated into five general categories: Common Analytical Modulators, Jammer/Interference Modulators, Coded Modulators, External File Modulators, and Script Plugin Modulators.

For additional information on modulators, see one of the following categories:

Filter

To specify a filter model, select Use and browse to a filter model. For more information, see Filter Models.

Additional Gains and Losses

During communications analyses, it is often necessary to model gains and losses that affect performance but are not defined using built-in analytical models. STK allows you to model these by specifying miscellaneous gains and losses that can be added to the equation.

Post Transmit Gains/Losses. To define a Gain or Loss, click Add. Enter a brief description of the Gain or Loss in the Identifier field and its value in the Gain field. Remember to make it negative if a Loss is being entered. Once the values are entered, you can click Remove to delete an entry from the table. To modify an existing entry, simply edit the fields in the grid. The value in the Pre-Receive field will reflect the net value of all gains and losses recorded in the table.