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Baofeng UV5R series Performance Tests Antenna Sweeps Power/Sensitivity Test 3 (below) shows VHF squelch settings were corrected on units with newer firmware. |
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SQUELCH I measured the input sensitivity required to just open the squelch on both UHF and VHF. UHF - Measured at 446 MHz using 3.3 kHz deviation and 1 kHz modulation. Radio was set to Wide mode.
VHF - Measured at 146 MHz using 3.3 kHz deviation and 1 kHz modulation. Radio was set to Wide mode. All squelch level settings 1 through 9 all open squelch at 0.1uV. At least on my UV-5R the squelch is NOT working correctly. Does anyone else have a calibrated RF signal generator that can confirm my finding? SENSITIVITY Sensitivity - I only measured the receiver sensitivity at one frequency on UHF and VHF. Deviation was set to 3.3 kHz with 1 kHz modulation. Radio was set to Wide mode. UHF - 446 MHz = .27uV for 20dB quieting VHF - 146 MHz = .25uV for 20dB quieting POWER OUTPUT Power Output - Was measured with a fully charged battery. Transmitter was keyed for 3 seconds before the measurement was made. Transmitter was allowed to cool for 30 seconds before next measurement. Measurement was made using a Bird Wattmeter and 5 Watt UHF and VHF slugs. All measurements were made using a 50 Ohm dummy load.
Receiver sensitivity and power output is well within what I would consider normal. Steve, WB8GRS
Just hooked up my new UV-5R to my service monitor and ran it through some tests: VHF f = 146.520 MHz Receiver 12 dB SINAD = 0.14 uV Receiver Squelch (with squelch menu setting at 3) = 0.06 uV Transmitter Power Output (Low) = 1.5 Watts Transmitter Power Output (High) = 4.5 Watts UHF f = 446.000 MHz Receiver 12 dB SINAD = 0.13 uV Receiver Squelch (with squelch menu setting at 3) = 0.08 uV Transmitter Power Output (Low) = 1.4 Watts Transmitter Power Output (High) = 4.3 Watts These numbers are VERY good! The receiver is super sensitive! A typical "YeaComWood" hand-held receivers spec out at 0.32uV on 2m and 0.16uV on 70cm - and they "fudge" the results by using 3.5 kHz deviation in the SINAD test. It's supposed to be 3 kHz - and yes, a FM receiver will receive a high deviation weak signal better than a low deviation weak signal. For a $50 radio, the transmit & receive performance is equal to (if not better) than anything else out there... Les, VA6LM / Ray, VA6RS
I just checked my UV-5RA using an IFR 2945A Communications monitor. Radio tested: UV-5RA VHF Tx tested at 146.34 MHz Pwr Out: 4.99w CTCSS Deviation:680Hz Voice Deviation (spoken “one”) wide = 4.0 kHz narrow = 1.58 kHz Voice Deviation (whistle) wide = 5.1 kHz narrow = 2.47 kHz Spurs: Down more than 60dB VHF Rx tested at 146.940 MHz Sensitivity (to break squelch) I did not test signal/noise: Squelch 0 = Squelch off Squelch 1 = 0.066uV Squelch 5 = 0.108uV Squelch 9 = 0.170uV UHF Tx tested at 441.625 MHz Pwr Out: 4.48w CTCSS Deviation:680Hz Voice Deviation (spoken “one”) wide = 4.17 kHz narrow = 1.41 kHz Voice Deviation (whistle) wide = 4.89 kHz narrow = 2.32 kHz Spurs: Down more than 60dB UHF Rx tested at 446.625 MHz Sensitivity (to break squelch) I did not test signal/noise: Squelch 0 = Squelch off Squelch 1 = 0.050uV Squelch 5 = 0.199uV Squelch 9 = 0.257uV Voice deviation figures are what is normally expected for complex waveforms. The 2.5 & 5 kHz figures are Max limits. The specs look good, and sensitivity is excellent. I do not have the equipment to do selectivity and adjacent channel rejection/blocking tests, but we all know from experience that this LCR has very little front end filtering, so performance in high RF environments is not great. Lance KW7LH | ||||||||
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