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Baofeng UV5RV2+

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finding offset frequency

I am programming a Baofeng UV5RV2+ radio and I am having trouble in finding out how to  determine what the offset is I would like to know, I know its a offset from the RX to the TX or TX to RX i'm  just trying to figure out which it is or how to find it. can someone please help me
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In a typical Scenario, your offset will be either higher, or lower than the output frequency (RX for the User radio side) of a repeater.

Depending upon the repeater system you are using, will determine the "input" or "output" of the repeater.

In an example.  If a repeater is heard on 440.000 Mhz and it has a + offset for its input, you program a transmit on your radio of 445.000 Mhz (Assuming a standard 5Mhz offset for US Repeaters).

For USA, we use a + or - offset of 5Mhz for UHF Commercial and Amateur, but others are possible.  This is just the standard that most repeaters use.

Of course this would need to be adjusted to suit your location and repeater system.

Most of this information is easily obtainable using a repeaterbook or FCC Database (or auto import from chirp if ham repeaters)

If you are using this radio, I would suggest using the "CHIRP" software, but first verifying if it supports this model in the model list.  You may have to use a "beta" or "nightly" version of the software.

Best Regards,

App_Hack
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I have the programming software and cable for the radio in question but like our fire frequencies is as follows RX=155.790 and TX-158.925 when programming my baofeng radio how can I determine what my offset is, because if it isn't correct then I will be unable to talk to our dispatch.
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To calculate the offset amount is fairly straitforward.

If you hear the repeater on the radio at 155.790 and need to transmit at 158.925 you can calculate as follows:

158.925 -155.790 = 3.315mhz offset in the positive direction.

If you need to listen on 158.925 and transmit on the lower 155.790 frequency, that would be a 3.315mhz offset in the negative direction.

If you need to use kilo hertz for offset it is 3315 kHz offset.

Please also note that you may need a digital coded squelch (dcs) or continuous tone coded squelch system (ctcss) tone configured in the radio to allow the repeater to open for your transmission.  This is fairly easy to find out if you have access to a radio on the system and your radio together and are able to perform some testing.

My suggestion is once you have it working, to make sure you document your settings and share them with your fellow members of the dept.  This will break the cost of entry to others for radios as baofeng can do the same job as a motorola for pennies.

Our local dept uses tyt as they use digital (apco25) and they can by 10 radios for the price of one motorola.

I wish you luck on your programming and hope it all works out.  If you need help finding the ctcss, I can assist you further with a procedure as I have a similar uv5r radio.

Best Regards,

App_hack
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How could I send you the file where I have my baofeng saved on  to see if you can help me and tell me if I have everything correct?    I am the only programmer that several fire departments use and the baofeng and motorolla radios is the only radios I have trouble in programming
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If you can upload this to something like DropBox, or Google Drive and send a link, or even do a fileshare of some sort that you can post a link to that would help.

I have no reliable way to send or receive files such as this without them getting clobbered by my e-mail security.

Best Regards,
App_Hack
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I now have a dropbox account but cant figure on how to share an image file of my baeofeng programming, that's the way it saves once I program it
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wvfireman said

I am the only programmer that several fire departments use and the baofeng and motorolla radios is the only radios I have trouble in programming
Sorry, I have to start out by saying if you are the radio guy for several places, this shouldn't be an issue.

Having said that…

Are you using chirp or the BF factory software? I prefer CHIRP, but always download the latest revision off his site.

I'm going to talk to you like you don't really know how to program things, hope this doesn't offend.

First, is your system conventional or trunked. If it's trunked, this is way out of the scope of this discussion.

Second, do you know for certain what your frequency sets are?

You will need to know the listen frequency (aka RX), the listen squelch (aka CSQ, PL, DPL), the transmit frequency (aka TX), and the transmit tones (aka PL, DPL), if any.

If it is a direct channel, your tx and rx will be the same.

If it is a repeat channel, your tx will differ.

If it is some kinda fruity system, none of this will fit perfectly.

If you are unsure, there are several ways to figure this out. One is to pull the info from a known good radio. Another is a scanner. Radioreference probably lists it as well.

Once you get that data, fire up CHIRP.

(see next post)

ok, I can't break this up. Sorry

So,



CHIRP is off.

Make sure the radio is off. Attach your programming cable, then plug it in to the computer. Give it a dozen seconds to find it and install it.

Turn the radio on.

Turn CHIRP on.

You should see a blank slate.

Click Radio>download from radio.

You should get a dialog asking what radio, and maybe what port. (setting up the radio first BEFORE starting CHIRP, CHIRP can sometimes 'see' what the right port is.)

Then click OK. This should initiate communications with the radio, and you should be eventually presented with what is in the codeplug. It's always smart to read the radio first, no matter what system you're using. Save that image using the save button.

Then, start loading your frequency set.

You will see LOC / FREQUENCY / NAME / TONE MODE / TONE / TONE SQL / DTCS CODE / DTCS POL / DUPLEX / OFFSET /  MODE / TUNE STEP.

loc is the location in memory.
Frequency is your recieve (listening) frequency.
Name is the alias you want the little screen to say on the radio. it is limited.
tone mode is if the radio needs something extra to open the squelch. If there is no tone, leave it set to none.
If you need a tone, you'll select TSQL. If it's a digital code, you'll select DTCS.
Then, put the tone for recieve in TONE.
Then, if the radio needs a tone to open a repeater or squelch, you'll put that in ToneSql.
If you need digital code, you leave the TONE and ToneSQL at 88.5 (or whatever, it's a placeholder), then put the appropriate code in DTCS CODE, and the appropriate polarity in DTCS Pol.
If you don't need them, you'll leave them alone.
Then, you can put in the repeater shift in two different ways.
You can select DUPLEX, and set to none. that will give you a talkaround or simplex channel. TX will equal RX.
You can select DUPLEX and set it to + or -. If you do this, you will need to calculate the absolute difference between the TX and RX frequencies. For example, RX is 450.000, TX needs to be 455.000, select + and in OFFSET put 5.0.
An easier way to do this is to select Split in DUPLEX. Then type the TX frequency into OFFSET. Sometimes this works, sometimes it doesn't.
Selecting Off, makes this a listen only (can't transmit) channel.
MODE - it's either gonna be NFM or WFM. If you haven't narrowbanded, or don't know, try WFM first. If it sounds funny when you transmit, switch this to NFM.
Tune Step should autoselect.
Skip is to skip it in scanning.

save your plug when you're done, then select SAVE TO RADIO, follow the prompts and….

That's it.

 

Last edit: by surfacemount

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I am only having trouble in getting the correct offset programmed in other than that I can program these radios well.  Thanks
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wvfireman

Are you located in the US?  And is your department or any of it's personnel using the Baufeng radios for anything other than a scanner or listening device, I would use extreme caution due to OSHA and NFPA regulations for fire department communication devices.  
As a dealer of RELM/BK Radio products I have run into issues with departments not having the funding for purchase of a true "Public Safety" grade radio so they bought low end "Commercial" or "Personal" grade radios and have received fines due to using them in IDLH or any hazardous environment. Including wildland firefighting.
If you are outside the US, check your laws that govern public safety entities.
With that said, as a firefighter myself, our department uses Motorola for structural and BK Radios for wildland.  As a COMT, I will carry a my UV-5RE as a backup radio, however I still run the risk of being Demobbed from the fire if something does happen.  
Please feel free to PM me if you have other questions about radios and communications devices in the fire service, In or Out of the US.
Otherwise, what surfacemount and app_hack are right on with the info they provided you.
Good luck and be safe out there.
J  (KC7HAM)  
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SALUT a tous, je fais l'achat d'un Baofeng uv-5R et je vais Avoir Besoin de votre aide pour mes premiers pas …

Je suis du Québec, Canada et je Je aurais Besoin de Votre Soutien versez passion developper this nouvelle.

Moi j'ai du Apple Comme moi si ordi dite il y a des Logiciels répandrai mon Mac ???

Au plaisir
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Quebec1966 said

SALUT a tous, je fais l'achat d'un Baofeng uv-5R et je vais Avoir Besoin de votre aide pour mes premiers pas …

Je suis du Québec, Canada et je Je aurais Besoin de Votre Soutien versez passion developper this nouvelle.

Moi j'ai du Apple Comme moi si ordi dite il y a des Logiciels répandrai mon Mac ???

Au plaisir

there is a version of the CHIRP programming software for   MAC OSX
I have uploaded the OSX version here if you still need it ask for it to be validated  

location USA
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