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The received signal has to be input to the RF detector, which outputs a voltage proportional to power.
I was wondering if it's correct to assume that the received signal can be measured at the RX pin, so I can just connect the RX pin and Ground to the input of the RF detector. It seemed obvious but now I'm not sure!
I know the RX signal has no measure of power--
[...] I was wondering if it's correct to assume that the received signal can be measured at the RX pin, so I can just connect the RX pin and Ground to the input of the RF detector.
it's the RF detector I'm using that outputs a power measurement. The RF detector requires an RF input, and so I'm trying to understand what to connect from the Bluetooth module to the RF input.
Thanks for the insight. I just want to create a Bluetooth signal strength indicator as a project.
Thanks for the suggestion--I'm thinking of a simpler method [...]
[...] and I was wondering if you have insight about this. I have a demo board for the LTC553 RF power detector that has an RF input and Vout pin that gives the voltage proportional to power. I connected a 2.4 GHz antenna (from http://www.sparkfun.com/products/145) to the RF input, and the Vout pin to the ADC of a microcontroller, with the intent of viewing the ADC output on an LCD screen that is interfaced with the microcontroller. I have bluetooth on my computer so I thought the antenna could pick up the signal. However, nothing seems to be happening and I don't know how to troubleshoot!
Is the option of creating "complete 2.4GHz receiver that can act as a preamplifier stage" a considerable task for a student/hobbyist?
I'm having trouble finding information about how to do this. Looking up this topic online, I am only finding preamplifier products for TVs!
I finally got the parts to build the field strength meter...and I can't get it to work! I used the 2.4 GHz duck antenna from http://www.sparkfun.com/products/145 and got a reverse polarized SMA to BNC adaptor so that the antenna can connect to a bnc cable with alligator clips on the other end. I connected the alligator clips across the nodes shown in the schematic. Do you see anything wrong with this?
There's something I'm not understanding about the schematic. If the copper wire is the antenna, then it looks like the copper wire is in parallel with the resistor, shorting it out...and what does the Ground symbol represent, because there's no battery?
Also what did you mean when you wrote "At the right side of the diode (in the schematic) you needn't worry over high frequencies"? Not to include this part of the circuit?