# SSV

URL: https://irs.systems/en/docs/ssv

Signal SuperVision means the permanent, lossless and real-time observation of an input signal against a defined set of rules.
The rules can easily be defined in a comfortable editor.
Evaluation is performed in real-time by FPGA modules, detected errors are counted internally.
An auto-record feature can capture the waveforms around the first detected error as a waveform, including error and trigger positions.

**SSV** = **S**ignal **S**uper**V**ision

## Key Features

- Multi-channel optical isolated analog input (16ch@1MS/s, 48ch@125kS/s per channel)
- Variable measurement range for higher accuracy (RPLUS modules only)
- FPGA based autonomous real-time signal analysis (0% CPU load)
- Lossless signal observation on all channels
- Independent trigger mode (self, reference, timer) and settings per channel
- Optional trigger constraints per channel and between channels (period check, reference trigger distance check)
- Waveform snapshot on error detection
- Integrated test functions and error counting
- Intuitive project configuration editor
- API for configuration and execution

IRS SSV products use an FPGA (field programmable gate array) for high speed, gap-less and autonomous real-time signal analysis and supervision for periodic signals. Depending on the selected module, up to 48 channels per module can be observed simultaneously.
Each Signal SuperVision channel can apply built-in analysis functions to definable regions of a periodic signal (average, duty cycle, upper and lower limit, area-check, edge counter).

Because these functions are implemented as a programmable hardware circuit (FPGA), they are evaluated in real time and don't require any CPU time on the host system during execution. No single sample will be missed.
Each function provides several parameters to setup the measurement and evaluation limits. Failed tests are stored and counted internally (up to 256 errors per function definition).

The host is only required to configure the modules, fetch the results, store waveform data and reset the error counters.

The evaluation window size depends on the module/carrier combination. All cards have at least a max period width of 1 second (48 channel low speed module: 8 seconds) and a maximum analysis window width of 250ms (48ch: 1s).

## Version Information

This documentation refers to SSV drivers and applications version 4.2.0.0