HT1000 Narrowband

[futureemt14]

I just got two HT1000 DN models for a good price that included programming. I have a question regarding these radios. What would happen if say you had a wideband frequency and entered it as narrowband? Also how can I tell if a frequency is narrow or wideband?

The reason I ask this is because I had all the frequencies entered as narrow 12.5 KHz but I think that was a mistake on my part. I have a few frequencies that I for sure know were narrowband and they work fine with beautiful crisp RX audio. But on a few others there is the same humming/buzzing noise I had with another HT1000. I think that the buzzing is coming from entering the wideband frequencies as narrow. But I have very limited knowledge on this so that is why i'm asking you guys.

Would it help for me to list the frequencies?

Thank you

 

[WX9EMS]

The simple answer is if it is a frequency that falls under Part 90, it must be narrow band (12.5 KHz or less). There is no mistake there. But, if there were some frequencies for Amateur Radio, these should have been programmed for wide band (25 KHz).

 

[N4KVE]

Just did this yesterday by mistake. On simplex, or direct [radio to radio, no repeater] the wide band radio listening to the narrow band radio had low rx volume, but was clear. But the narrow band radio listening to the wide band radio was very loud, & was clipping, making it unusable. I quickly realized the problem & fixed it. Then everything was great on both ends.

 

[com501]

I just got two HT1000 DN models for a good price that included programming. I have a question regarding these radios. What would happen if say you had a wideband frequency and entered it as narrowband? Also how can I tell if a frequency is narrow or wideband?

The reason I ask this is because I had all the frequencies entered as narrow 12.5 KHz but I think that was a mistake on my part. I have a few frequencies that I for sure know were narrowband and they work fine with beautiful crisp RX audio. But on a few others there is the same humming/buzzing noise I had with another HT1000. I think that the buzzing is coming from entering the wideband frequencies as narrow. But I have very limited knowledge on this so that is why i'm asking you guys.

Would it help for me to list the frequencies?

Thank you

Yes, it would.

All Part 90 frequencies are narrowband with few exceptions. Some Part 95 frequencies are wide, some are narrow.

On VHF, marine frequencies (which are NOT type accepted on an HT1000) are wideband, weather is wideband (no TX of course), some paging. MOST amateur frequencies are wideband (but not ALL-some hams have actually kept up with the times), etc.

So, posting what you have would help.

 

[SCPD]

Don't forget when in rss under each channel hit f2 or F3 I forget for more options in channel mode screen. You'll see a list and you can select 12.5 or 25 kHz etc. This is a per channel deal so you'll have to change as needed per channel.

 

[futureemt14]

Thanks a lot guys!

 

[futureemt14]

These are the ones with the buzzing:

151.385
154.13
158.92500

And here are ones that work perfectly.

151.42250
153.90500
154.32500
155.52000
155.89500

Below is the link to the info on these frequencies. I also use 3 Preble Co frequencies which are all fine. Please note these are RX only and this radio is being used simply as a more rugged scanner to monitor FD channels.
Montgomery County, Ohio (OH) Scanner Frequencies and Radio Frequency Reference

If you could please tell me if these are narrowband or wideband (or help guide me on finding it out on my own.)

Thanks

 

[cabletech]

All the frequencies you have listed dare covered by FCC part 90 rules. This means that any user must be using the frequency in the 12.5kz narrow band mode.

Simple.

Frequency's with four numbers after the . (.4225) are what are also called splitter frequency's, nut use narrow

 

[SteveC0625]

These are the ones with the buzzing:

151.385
154.13
158.92500

And here are ones that work perfectly.

151.42250
153.90500
154.32500
155.52000
155.89500

Below is the link to the info on these frequencies. I also use 3 Preble Co frequencies which are all fine. Please note these are RX only and this radio is being used simply as a more rugged scanner to monitor FD channels.
Montgomery County, Ohio (OH) Scanner Frequencies and Radio Frequency Reference

If you could please tell me if these are narrowband or wideband (or help guide me on finding it out on my own.)

Thanks

There is another issue or two to be considered here. First, while it is true that licensees using these Part 90 frequencies were required to shift to NB operation by 1/1/13, a small percentage of them applied for and received temporary permission from the FCC to remain wideband for a period of time while they finished upgrading their systems.

Secondly, some agencies have not bothered to NB their equipment. The reasons for this are numerous: Fire house lawyers know better than the FCC, we'll never get caught, who really cares, no on ever told us, etc. The list is quite long and none of these reasons are valid.

To find out if any of your local agencies are still operating wideband, legally or illegally, you will have to do your own local research. If it was me, I'd start with the county fire coordinator's office and/or the county EMA office.

Each of your programmed frequencies will have to match, NB or WB, what is actually being transmitted in your area for you to get the best possible audio. Once you know for certain what each frequency is (NB or WB), then you will want to have the programming in your radio verified, preferably by someone who really knows what they are doing.

 

[domes]

HT 1000's are notorious for none-compliant narrow banding. Some early versions are not NB capable at all. Some were NB capable with a field upgrade kit that the FCC later band around 2011 (I believe) The "upgraded" radios are no-longer compliant. Some are capable of taking a NB program but must also be tuned by a competent tech. The latest versions are simply NB by programming but I would not trust those either. All HT-1000's should be checked by a competent tech with proper equipment to verify that they are NB compliant, not a job for the casual user with ebay or other questionable sourced software.

 

[kayn1n32008]

HT 1000's are notorious for none-compliant narrow banding. Some early versions are not NB capable at all. Some were NB capable with a field upgrade kit that the FCC later band around 2011 (I believe) The "upgraded" radios are no-longer compliant. Some are capable of taking a NB program but must also be tuned by a competent tech. The latest versions are simply NB by programming but I would not trust those either. All HT-1000's should be checked by a competent tech with proper equipment to verify that they are NB compliant, not a job for the casual user with ebay or other questionable sourced software.

DN models are compliant, and do splinter channels. Look at the model number, if it is not a DN do not buy it... Simple, no need for benching, or a competent tech... Not rocket science... Any casual user can tell...


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[FFPM571]

All HT1000's are narrowband complainant DN models do the splinter freqs

 

[ramal121]

All HT1000's are narrowband complainant DN models do the splinter freqs

AN models only do wide or narrow as ordered from the factory. You cannot change the band width as the FCC ID will not change even with an upgrade kit. This is why the upgrade kits were discontinued. BN, CN and DN models can be programmed wide or narrow as needed.

DN models have a smaller step that can accommodate programming of the new (I hesitate to call them "splinter channels") that are popping up now. Mostly for the VHF channels that have gone to 7.5 KHz spacing. 12.5 KHz channel spacing on UHF has been supported long before narrow banding and the HT-1000 model.

As far as the OP, mixing up narrow/wide should only result in a difference of volume levels. Not sure what the buzzing is all about unless the PL tone is coming in above the obnoxious level.

 

[com501]

The OP stated he has DNs, which are desirable both from a firmware and split standpoint. Unless the radios are in serious need of a PM, there is no reason they need anything special. The buzzing may also be something on the channel the OP is having a hard time translating into radio speak. Perhaps a digital modulation type?

 

[futureemt14]

Thanks guys. These frequencies are simplex dispatch simulcasts of the 800mhz trunking system. The County is going to a new digital system next year. Since they are changing soon could that be why these could still be wideband?