Creating a Simulcast Delay vs Signal File

The Simulcast Delay vs Signal File is a requirement for the Hess Simulcast Monte Carlo Reliability study. This file is pointed to within the TSB88 Studies Setup menu.

The Hess Simulcast Monte Carlo Reliability study calculates the reliability of a signal at the remote/mobile unit receiver where that signal is composed of simulcast (synchronous) transmissions from two or more transmitters. A requirement for this study is a Simulcast Delay vs. Signal performance curve file for the remote/mobile receiver. The data in this file is used to determine the criteria for successful receiver performance. This file is created using the editor found in Utilities -> Create Simulcast Curve File…

The entries in the file represent the receiver threshold under different simulcast conditions. They are derived from manufacturers' specifications or laboratory testing of the receiver. The "dB" value is Signal to Noise Ratio ("SNR"). The "Delay" value is the simulcast signal relative delay (typically RMS delay). A point that falls in the area on or above the line in the graph represents a "pass" meaning that the receiver successfully demodulates the signal.

Once the file is created, go into the menu Studies > TSB88 Studies Setup. This is where you will point to the newly created file.