Difference between revisions of "Baofeng UV-5R"
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Revision as of 16:49, 16 September 2014
Contents
Baofeng UV-5R Notes (BFS311 Firmware)
- It is not known how much of this information applies to other firmware versions, model numbers or clones from other manufacturers.
Test Unit
- Baofeng UV-5R
- Firmware BFS311 130903N
- S/N US201311****
- S/N may also be a date code. Unit was purchased in 11/2013 and may have been manufactured the same month.
Birdies
The UV-5R has a 26 MHz reference oscillator. Reference oscillator harmonics can be heard on 156.0, 416.0, 442.0, 468.0 and 494.0 MHz.
CTCSS
- CTCTSS transmit and receive tone frequencies can be set via the numeric keypad to any frequency from 60.0 to 259.9 Hz in .1 Hz increments. The up/down arrow keys srcoll through the standard tone frequencies.
DTMF
- On firmware version BFS311, and possibly others, it is not possible to send a DTMF "D" tone. Pressing the [EXIT] key sends "0" instead of "D".
- The internal microphone is hot when DTMF or 1750 Hz burst tones are transmitted.
- Pressing keypad keys while transmitting does not mute the mic. The mic can pick up the sidetone from the speaker and overdrive or distort the transmitted tones.
- Set Menu 16 DTMFST to OFF to keep the sidetone from interfering with transmitted DTMF and 1750 Hz burst tones.
Entering Frequencies
- When entering frequencies via the keypad in VFO mode the radio will only accept 6 digits; three before the decimal point and three after the decimal point.
- The radio will only accept 0 or 5 in the third decimal place.
- You cannot enter a frequency with more than 3 decimal places such as 451.0025 or 451.00625 using only the number keys.
- If the third decimal place is not 0 or 5 you must use the up/down arrow keys to change the rest of the digits and you must have Menu 1 STEP set to the correct value.
- To enter 451.0025 the step must be set to 2.5K and you must press [4] [5] [1] [0] [0] [2] [UP ARROW].
- To enter 451.00625 the step must be set to 6.25K and you must press [4] [5] [1] [0] [0] [6] [UP ARROW].
- To enter 451.0125 the step can be set to either 2.5K, 6.25K or 12.5K and you must press [4] [5] [1] [0] [1] [2] [UP ARROW].
Power On Messages
Holding certain keys while powering on the unit displays the following messages:
- [3] Firmware version
- [6] Unknown. May be firmware date code. Can be changed with CHIRP programming software.
Preloaded Factory Test Frequencies
Ch Freq Tone 1 452.125 69.3 2 453.225 91.5 3 454.325 136.5 4 455.425 151.4 5 456.525 192.8 6 457.625 241.8 7 458.725 025N 8 459.825 134N 9 461.925 274N 10 462.225 346N 11 463.325 503N 12 464.425 073R 13 465.525 703R 14 402.225 15 437.425 16 479.975 17 138.550 18 157.650 19 172.750 20 438.500 21 155.700 VFO A 155.500 VFO B 136.000 FM 100.7
Receiver
- Receiver makes light crackling sounds while moving, even when receiving extremely strong signals from a few feet away. It appears to be some type of SDR artifact.
- Occasionally squlech opens and weak buzzing noises can be heard. May be SDR artifact or microprocessor noise.
Repeater STE
- Menu 36 RP-STE and Menu 37 RPT-RL do not appear to have any function at all.
Roger Beep
- 1st tone 1123 Hz 136 mS
- 2nd tone 865 Hz 202 mS
- No delay before tones are sent. No space between tones.
Scanning
- Scanning, and dual receive (TDR), stops on any signal or noise even in CTCSS/DCS decode mode.
- Scan speed is ~3.37 channels per second. (It takes 29.6 seconds to scan 100 channels)
- Scan delay time in CO mode is ~6 seconds.
- Scan resume time in TO mode is ~6 seconds. If the carrier drops in less than 6 seconds then scanning resumes immediately with no delay.
Squelch
- Setting Menu 0 SQL to 0 opens the squelch, settings 1-9 appear to be the same fixed level.
Squelch Tail Elimination (STE)
- When Menu 35 STE is ON, the radio sends a 55 Hz tone for ~280 mS when the PTT key is released. This occurs even if no CTCSS encode tone is selected (Menu 13 T-CTCS is OFF). Setting Menu 35 STE to OFF disables this.
- When DCS encode is enabled, the radio sends the standard DCS turnoff code (134.4 Hz tone) for ~280 mS when PTT is released. Setting Menu 35 STE to OFF disables this.
- The microphone remains hot while the STE 55 Hz tone or DCS 134.4 Hz turnoff code are being sent.
- In CTCSS or DCS decode mode if a signal with the proper CTCSS tone or DCS code is received and the tone/code is dropped, the squelch remains open for ~2 S.
- Menu 36 RP-STE and Menu 37 RPT-RL appear to have no function at all in any combination or with Menu 35 STE ON or OFF.
- Upon receiving a 55 Hz tone the the receive audio is muted, even when there is no receive CTCSS or DCS tone selected and regardless of Menu 35 STE, Menu 36 RP-STE, and Menu 37 RPT-RL settings. The receiver remains muted for ~750 mS after the carrier or 55 Hz tone drops.
N5R-20 and N5R-30 Firmware Bug
According to a post on 8/19/2014 on the baofeng_uv5r Yahoo Group:
- Radios affected: All UV5R series radios with new N5R-20 and N5R-30 firmware. This includes UV5RA, RB, RC, etc., as well as GT-3, BFF8, F8HP, etc.
- Radios Not affected: This does not affect the UV82 series.
- What occurs: If MENU 8 (Beep) is set to OFF, the receiver is muted. Setting MENU 8 back to on un-mutes the receiver. This does not affect any other function of the radio. Only the Keypad Beep.
This firmware version first appeared around July or August 2014.
UV-5R Stock Dual Band Helical Antenna
- Labeled 136-174, 400-520 MHz
- Base is grounded.
- Tap point 11 turns up from base. Has unknown value capacitor at tap point.
- Top section 19 turns from tap point to end of coil has wider spacing.
- Youtube video of antenna dissassembly: http://www.youtube.com/watch?v=MtnDvWGTKpk
Related Links
- Baofeng/Pofung English web site
- baofeng_uv5r Yahoo Group
- CHIRP programming software
- miklor.com FAQ and support site
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