Noise Sources
Description
VDI Noise Sources (NS) offer high Excessive Noise Ratio (ENR) performance across full waveguide bands up to 220 GHz. VDI Noise Sources include waveguide isolators to improve the match between the NS and the DUT and are configured with a +28V voltage bias port, compatible with many spectrum analyzers or noise figure analyzers. Additional noise sources are under development.
VDI Noise Sources can be used to measure the noise figure of amplifiers using a Keysight EXA or similar spectrum analyzer with the Noise Figure Measurement software, VDI down-converter (VDI SAX), and an external LO signal generator.
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| VDI Part Number | WR15NS | | WR10NS | | WR6.5NS | WR5.1NS | WR4.3NS | WR3.4NS |
| Frequency Band (GHz) | 50-75 | 60-90 | 75-110 | 90-140 | 110-170 | 140-220 | 170-260 | 220-330 |
| Waveguide Interface | WR-15 | WR-12 | WR-10 | WR-8.0 | WR-6.5 | WR-5.1 | WR-4.3 | WR-3.4 |
| ENR (dB, typical)* | 17 | 15 | 15 | 10 | 10 | 8.5 | 5.5 | 5.5 |
*VDI to include an appropriately formatted ENR file (for use on a Keysight EXA or similar analyzer) in the shipped
documentation.
General Specifications for VDI Noise Sources | |
| Description | Specification |
| DC Bias Voltage (V) | +28 ±1 |
| Current Draw (mA) | <10 |
| Bias Voltage Connector | 2.92mm(f)* |
| Maximum Weight (lbs.) | ~0.1 |
| Isolator Return Loss (Typical) | 20 dB |
| Output Flange | UG-387/U-M** |
| Operating Temperature (Typical / Recommended) | 25°C / 20-30°C |
*VDI to include a SMA(m) to BNC(f) adapter.
**VDI Noise Sources include Compact Isolators from MHC. MHC Isolators
have slightly rotated output waveguide. The impact of the rotated waveguide
is often negligible. Click here for more information on the rotated waveguide.
Contact vdirfq@vadiodes.com for more information.