FFT2G
CUSTOMISABLE SPECTRUM ANALYZING DEVICE
The 2nd generation FFT2G spectrometer is a customisable spectrum analysing device designed for optimised high bandwidth and high resolution.
Designed and built by our team at AAC Omnisys for ground based applications and more specifically, radio astronomy, the FFT2G is robust, reliable and allows for flexibility with configurable signal processing Field Programmable Gate Array as a core feature. The FFT2G (Fast Fourier Transform) spectrometer provides impressive bandwidth with each module processing eight input signals with bandwidth of 125 MHz in 8192 spectral channels. Used as a stand-along backend measurement device in a laboratory environment or built into a bigger system with multiple modules allowing an increase in both bandwidth and resolution even further to cope with multi pixel frontend designs.
Flexibility
A core feature of the FFT2G backend is a configurable signal processing Field Programmable Gate Array. This controls the dual multi-core high speed analogue to digital converter and computes the FFT power spectrums. The flexibility of the FPGA opens an indefinite variety of options or features to be added.
Bandwidth
The FFT2G has an impressive 5000 MHz instantaneous bandwidth sampled by high-speed ADCs and processed by a highly effective real-time pipelined and parallel FFT-core.
Resolution
The spectrometer has a 32-bit fine power amplitude resolution for all frequency channels accumulated during FFT integration time.
Why the FFT2G?
- Input channels up to 8
- Input bandwidth up to 5000 MHz
- FFT frequency resolution up to 32k channels
- Single supply voltage 12 V
- Supply power consumption < 40 W
Technical Specifications
| Dimensions | |
|---|---|
| Outer dimensions (mm) | 220 x 115 x 25 |
| Mass (g) | 750 |
| Electrical / Interface | Min | Typ | Max |
|---|---|---|---|
| Power consumption (W) | - | 40 | - |
| Supply voltage (V) | - | 12 | - |
| General purpose IO voltage (V) | 0 | 3.3 | 5 |
| USB2.0 data (Mbit/s) | - | 480 | - |
| Performance | Min | Typ | Max |
|---|---|---|---|
| IF inputs | 1 | - | 8 |
| IF input full scale power (dBm) | - | -3 | - |
| IF bandwidth (MHz) | - | - | 5000 |
| Sampling frequency (MHz) | - | - | 10000 |
| Sampling ADC resolution (bits) | - | 10 | - |
| FFT frequency resolution (channels) | - | - | 32768 |
| FFT channel resolution (bits) | - | 32 | - |
| FFT integration time (s) | 0.1 | - | 10 |
| Off-the-shelf firmware | ||
|---|---|---|
| Part ID | Mode | Description (inputs x bandwidth, channels) |
| 126 | IQ | 1 x 5000 MHz, 16384 channels |
| 235 | IQ | 1 x 5000 MHz, 16384 channels, polyphase |
| 277 | Real | 2 x 2500 MHz, 8192 channels |
| 766 | Real | 1 x 2500 MHz, 32768 channels |
| 3978 | Real | 2 x 1250 MHz, 16384 channels |
| 4050 | Real | 4 x 1250 MHz, 4096 channels |
| 4070 | Real | 8 x 650 MHz, 2048 channels |
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