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The detector is is used for RF signal power detection of frequency range between 1MHZ and 600MHZ.
It can detect a rf signal of power from -74dBm to 18dBm, and convert the RF signal into a DC voltage output.
The higher radio frequency signal range or power is, the higher output voltage will be; output voltage is proportional to logarithm of input signal range. Widely used for RF signal detection, signal power measurement, environment field strength detection, can also be used as a part of automatic gain control and automatic level control.
It can be made into 1mw ~ 1kw RF power meter after appropriate transformation.
Specifications:
Working Frequency: 1MHZ---600MHZ
Measuring Power: -74dBm to +18dBm
Output Voltage: 0---2.5V
Detection Slope: 25mV/dBm (typical)
Input Impedance: 50ohm
Power Supply Voltage: 6-15V
RF Input Connector: SMA-female
OUT: Detection Output
VCC: DC Power Supply
Package Includes:
1 x RF Logarithmic Detector
Steve McCauley
Reviewed in the United States on May 1, 2024
I removed one star because there is no datasheet supplied, but one of the photos in the main description shows the schematic and you can figure out how to hook it up. All that is required is a 9V battery and a short set of jumper leads that terminate in banana plugs to fit your multimeter. I am using it to adjust antennas for strongest radiated signal.
R. Cushing
Reviewed in the United States on July 7, 2022
Works pretty much as expected except the module RF input has a 100 ohm SMT resistor tied to ground. That's unusual since many RF devices are designed for 50 ohm impedance. I replaced the 100 ohm SMT resistor with a leaded 56 ohm resistor to approximate a 50 ohm Z. The module output closely followed the AD8703 datasheet spec. of 25 mV per 1 dB change (over the 20 dB range that I checked).
Mr. Steve
Reviewed in the United States on January 6, 2022
Basic input and output circuitry, IC, and regulator on one nicely laid out board. The heart of a field strength meter project. Later, the field strength meter project turned out slick, so, I ordered a second board for a rf exposure alarm.
Optimist
Reviewed in the United States on January 30, 2022
Well constructed and works great - even when I messed up and only applied a 5V supply initially. Checking the description in the Amazon ad, it says 6 to 15V (it has a 78L05 regulator on-board as shown in the first picture. Apparently the AD8307 its based on works down to 2.7V and the regulator was still passing something above 3V :-)A couple pictures are attached. One at -40 dBm 100 MHz. The other with no input (but with input jack terminated in 50 Ohms. Seems to match the AD8307 datasheet output voltages as it should.
Robert E.
Reviewed in the United States on May 7, 2020
DOA!
El Supremo
Reviewed in the United States on August 9, 2019
Needed to trace down some RFI issues I'm having (Solar PV Inverter is a non-trivial source on EMI...), so I cobbled this together in a few hours. I did not have a shielded housing, but the plastic housing I used (see photo) worked in the sense that the PCB itself did not seem to pick up any RF signal other than through the input connector. With no external signals, there was an offset on the output of about 170 mV (which would translate to +7dB). The offset is typical of log amps and for this device corresponds to an intercept of -82 dBm. The stated range of -74 dBm to +18 dBm gives a dynamic range of 92 dBm; the stated output range of 0 to 2.5v (~100 dB at 25 mV/dB) corresponds well enough to that (the description says 25mV/dBm, while the circuit board says 25mV/dB). With a little extra circuitry, the offset could be tuned out.Inside my housing is a 9v battery powering the unit. The output is connected to an RCA phono jack, which I then connected through a Harbor Freight DVM. For the cost and effort, this PCB is a quick-and-dirty way to make an el-cheapo signal strength meter. With a few input filters, its usefulness will improve.
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