diff --git a/docs/source/faq.rst b/docs/source/faq.rst index cfaf9d08..ba49f66d 100644 --- a/docs/source/faq.rst +++ b/docs/source/faq.rst @@ -5,49 +5,6 @@ FAQ ================================================ -What is the Transmit Power of HackRF? -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -HackRF One's absolute maximum TX power varies by operating frequency: - - * 1 MHz to 10 MHz: 5 dBm to 15 dBm, generally increasing as frequency increases (see this `blog post `__) - * 10 MHz to 2170 MHz: 5 dBm to 15 dBm, generally decreasing as frequency increases - * 2170 MHz to 2740 MHz: 13 dBm to 15 dBm - * 2740 MHz to 4000 MHz: 0 dBm to 5 dBm, decreasing as frequency increases - * 4000 MHz to 6000 MHz: -10 dBm to 0 dBm, generally decreasing as frequency increases - -Through most of the frequency range up to 4 GHz, the maximum TX power is between 0 and 10 dBm. The frequency range with best performance is 2170 MHz to 2740 MHz. - -Overall, the output power is enough to perform over-the-air experiments at close range or to drive an external amplifier. If you connect an external amplifier, you should also use an external bandpass filter for your operating frequency. - -Before you transmit, know your laws. HackRF One has not been tested for compliance with regulations governing transmission of radio signals. You are responsible for using your HackRF One legally. - - ----- - - -What is the Receive Power of HackRF? -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -The maximum RX power of HackRF One is -5 dBm. Exceeding -5 dBm can result in permanent damage! - -In theory, HackRF One can safely accept up to 10 dBm with the front-end RX amplifier disabled. However, a simple software or user error could enable the amplifier, resulting in permanent damage. It is better to use an external attenuator than to risk damage. - - ----- - - -What is the minimum signal power level that can be detected by HackRF? -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -This isn't a question that can be answered for a general purpose SDR platform such as HackRF. Any answer would be very specific to a particular application. For example, an answerable question might be: What is the minimum power level in dBm of modulation M at frequency F that can be detected by HackRF One with software S under configuration C at a bit error rate of no more than E%? Changing any of those variables (M, F, S, C, or E) would change the answer to the question. Even a seemingly minor software update might result in a significantly different answer. To learn the exact answer for a specific application, you would have to measure it yourself. - -HackRF's concrete specifications include operating frequency range, maximum sample rate, and dynamic range in bits. These specifications can be used to roughly determine the suitability of HackRF for a given application. Testing is required to finely measure performance in an application. Performance can typically be enhanced significantly by selecting an appropriate antenna, external amplifier, and/or external filter for the application. - - ----- - - Is HackRF full-duplex? ~~~~~~~~~~~~~~~~~~~~~~ diff --git a/docs/source/hackrf_one.rst b/docs/source/hackrf_one.rst index 7abddf2d..a152fef6 100644 --- a/docs/source/hackrf_one.rst +++ b/docs/source/hackrf_one.rst @@ -26,4 +26,43 @@ Features * portable * open source +What is the Receive Power of HackRF? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The maximum RX power of HackRF One is -5 dBm. Exceeding -5 dBm can result in permanent damage! + +In theory, HackRF One can safely accept up to 10 dBm with the front-end RX amplifier disabled. However, a simple software or user error could enable the amplifier, resulting in permanent damage. It is better to use an external attenuator than to risk damage. + + +---- + + +What is the minimum signal power level that can be detected by HackRF? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This isn't a question that can be answered for a general purpose SDR platform such as HackRF. Any answer would be very specific to a particular application. For example, an answerable question might be: What is the minimum power level in dBm of modulation M at frequency F that can be detected by HackRF One with software S under configuration C at a bit error rate of no more than E%? Changing any of those variables (M, F, S, C, or E) would change the answer to the question. Even a seemingly minor software update might result in a significantly different answer. To learn the exact answer for a specific application, you would have to measure it yourself. + +HackRF's concrete specifications include operating frequency range, maximum sample rate, and dynamic range in bits. These specifications can be used to roughly determine the suitability of HackRF for a given application. Testing is required to finely measure performance in an application. Performance can typically be enhanced significantly by selecting an appropriate antenna, external amplifier, and/or external filter for the application. + + +What is the Transmit Power of HackRF? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +HackRF One's absolute maximum TX power varies by operating frequency: + + * 1 MHz to 10 MHz: 5 dBm to 15 dBm, generally increasing as frequency increases (see this `blog post `__) + * 10 MHz to 2170 MHz: 5 dBm to 15 dBm, generally decreasing as frequency increases + * 2170 MHz to 2740 MHz: 13 dBm to 15 dBm + * 2740 MHz to 4000 MHz: 0 dBm to 5 dBm, decreasing as frequency increases + * 4000 MHz to 6000 MHz: -10 dBm to 0 dBm, generally decreasing as frequency increases + +Through most of the frequency range up to 4 GHz, the maximum TX power is between 0 and 10 dBm. The frequency range with best performance is 2170 MHz to 2740 MHz. + +Overall, the output power is enough to perform over-the-air experiments at close range or to drive an external amplifier. If you connect an external amplifier, you should also use an external bandpass filter for your operating frequency. + +Before you transmit, know your laws. HackRF One has not been tested for compliance with regulations governing transmission of radio signals. You are responsible for using your HackRF One legally. + + +---- +