Siretta snyper lte signal strength testers for 2g3g amp 4g networks siretta snyper lte spectrum the siretta snyper lte spectrum is a high performance cellular signal and network analyser for the lte 4g umts3g and gprs2g networks with coverage for the european frequency bandsif you want to install or service equipment that uses the cellular network you need to know what the cellular signal strength is and where the asset is best deployed the snyper lte spectrum provides you with