Several possible telemetry platform configuration options are shown in Figure B-9. The components shown are the Telemetry Front-End (TFE), the LAN Hub, an operator workstation (WS), and a Server, either a compute server or file server. Max configurations indicate scenarios where maximum use is made of any particular component.
Option 1. [Max TFE (A)] - all telemetry processes execute on the TFE, and the WS is used for X-windows user interface only. This option is desirable when high telemetry rates are required. It provides the fastest performance by eliminating delay time due to data transmission over a network. However, performance growth is limited due to processor technology. Also, multiple users monitoring a single stream would quickly overload the front-end processor.
Option 2. [Max TFE (B)] - based on Option 1, with workstation display software executing on the workstation, this option reduces non-essential loading on the TFE, allowing multi-user display load to be allocated across multiple WSs.
Option 3. [TFE/Server (A)] - based on Option 2, with the data monitoring process executing on the server, this option is viable if there are real-time requirements for anomaly identification using a rule-based inference engine. Most COTS telemetry systems support this option.
Option 4. [TFE/Server (B)]- based on Option 2, with the data conversion process added to the serve,. this option has similar advantages to Option 2, and also allows complex algorithm processing to reside on the server. This option is desirable if there are high telemetry rates and high processing load.
Option 5. [WS/Server] - based on Option 2, with all computational processes executing on the server, this option is desirable if there are low or high telemetry rates and high processing load.
Option 6. [Max WS (A)] - based on Option 5, with all telemetry processes except extraction executing on a WS, this option is desirable if there are higher telemetry rates or complex wavetrains such that the data extraction load is too high for a single workstation.
Option 7. [Max WS (B)] - similar to Option 6, except that the user WS assumes the extraction load, this option is desirable for low telemetry rates and processing complexity.
Option 8. [Max WS (C)] - similar to Option 6, except that the user workstation assumes the entire processing load and special hardware is required for formatting of PCM data onto the LAN.