Sometimes you have *too* much signal at the input to your GNSS. There's a problem using an attenuator to fix that: most receivers put a DC voltage for antenna power on the cable, and a typical attenuator that has a DC path to ground gets kind of hot. To address that, I made some boards that incorporate a bias tee on both sides of an attenuator to allow DC to flow around and not through the resistors. It's cleverly called the IsoTennuator. There are boards for nominally 3 dB, 8 dB, and 15 dB attenuation. While I was at it, I also made the UnBias-Tee which blocks DC and has LEDs to indicate the presence of voltage on either side of the blocking capacitor. TAPR is offering a kit that includes three IsoTennuators (nominal 3 dB, 8 dB, and 15 dB), and an UnBias-Tee. The boards are fully assembled except that the provided SMA connectors need to be installed. It's available now: https://tapr.org/product/the-isotennuator-and-unbias-tee-accessories-for-gus/ NOTE -- these are not precision devices! They're intended for signal level adjustment and shouldn't be used for calibrated measurements. John