#HACKRF ONE AMPLIFIER PDF#
#HACKRF ONE AMPLIFIER MOD#

At lower frequencies, the clamping is even more aggressive (more attenuation).

At 1GHz, 10dBm occurs with 18dBm input, which is much more than 1dB compression (from the graph in the SMP1330 data sheet). The compression power levels and the clamp voltages do not match each other as you might expect, because the PIN diodes in the SMP1330 are very non-linear, and the high frequency performance is limited by device capacitance, not diode clamping. It's just good design, and good business. There is a specific and complete solution for protection (involving two SMP1330's) in this very thread, including P_1db and IP3 calculations. Few more parts to protect everything else, but they're not so sensitive, and there's more room near the antenna entry point. SMP1330 is a very small device, and the MMIC needs no other parts to protect it. Looking at the layout, it seems that there's plenty of room if a couple of things get nudged over a little. And you're about to make it worse with an even more sensitive MMIC. You have my total respect for everything else, and for making it open source, but not for this. It doesn't need to be so dangerous, sorry, but it's just an irresponsible design. I'm sure people blow it by changing the antenna while it's powered (so the RF switch is on), because they don't realise that's incredibly dangerous. yet this MMIC is directly connected to an antenna. Would you solder the MMIC without grounding your soldering iron, or using anti-static safeguards? No, didn't think so. How many people have bought something else because of reading these complaints? In most cases, they complain about it somewhere and recommend others not to buy HackRF - I've seen a number of posts like this, folk who just stopped using it after changing the MMIC four times. People blame themselves, and either stop using the RF amp, use an external one, or replace it themselves. I don't think you're seeing all the failures. The TRF37D73 looks like a nice replacement for the MGA-81563, works down to 1MHz :) The Rx amp input is at 0V, so can be easily clamped by another SMP1330 to ground with no other components needed - a tighter clamp than the one at the antenna input.Д®ven if it's too late to get this onto the new production revision, perhaps you could still add a footprint in time, so buyers can add their own protection? This can be done right at the antenna and should protect every possible signal path, except the Rx amp which must be clamped about +-0.5V for safety. If anyone wishes to use the maximum Tx level, the clamping should allow 3.4Vp-p, so clamping it (via a coupling capacitor and equal resister divider) to GND and Vaa seems sensible. If a user has no need for max Tx output, protection could entail simply changing the TVS for the PIN diodes. The Tx amp maximum output level is well above the Rx amp's maximum allowable input level. It also shows limiting after a receive filter (that might sink some power when the clamp activates), which is not the case here.

#HACKRF ONE AMPLIFIER PDF#

Reddit group ( link) is much less active than RTL-SDRвЂ™s.That PDF shows only a single-ended limiter, but it would need to be double-ended.

Video guides ( link) for setting it up with GNURadio (youвЂ™re in for a learning mountain) вЂ“ and a few posts extolling its virtues for endeavors such as hacking wireless stuff like doorbells, remote controls and the like. Note that the 25-dollar dongle from can be easily and permanently modded for bias-T as well. I did not try this вЂ“ I donвЂ™t have a suitably modded LNA4ALL.

#HACKRF ONE AMPLIFIER MOD#

Our beloved staple, the LNA4ALL can be ordered from Adam with the HackRF mod ( link). Officially, capable of delivering 50mV at 3.3V. Bias-TДЄ.k.a sending power down the antenna cable. ItвЂ™s half the size, 270 dollars cheaper and works with most tools in Kali Linux, вЂњor so I heard, OfficerвЂќ. And I really mean you gotta be a Linux greybeard.ДЇor penetration testing: use more power and proper gear, like a 500 mW Alfa AWUS036NHA. Theoretically yes, wonвЂ™t work as a WiFi modem, adapter or range extender without extensive

Hackrf one amplifier