Understanding TAFL listings.

[JRichard]

I have been searching for frequencies (non-public safety) for my area using Industry Canada's TAFL site. The problem is I don't understand the information I'm receiving.

(TX)152.4350 (RX)154.3700
(TX)154.3700 (RX)152.4350

These frequencies are listed as being licensed for the same site and for the same user but how do you determine which is the true output frequency? This seems to happen more than once when I look through the database.

Please understand that I'm not close enough on a daily basis to hear anything on these freqs but if I'm traveling through the area it might be something I'd like to listen for.

Any suggestions?

Thanks,

 

[EricCottrell]

I have been searching for frequencies (non-public safety) for my area using Industry Canada's TAFL site. The problem is I don't understand the information I'm receiving.

(TX)152.4350 (RX)154.3700
(TX)154.3700 (RX)152.4350

These frequencies are listed as being licensed for the same site and for the same user but how do you determine which is the true output frequency? This seems to happen more than once when I look through the database.

Please understand that I'm not close enough on a daily basis to hear anything on these freqs but if I'm traveling through the area it might be something I'd like to listen for.

Any suggestions?

Thanks,

Hello,

This is either a system where the base and mobiles transmit on different frequencies or there is a repeater used which retransmits the mobiles from one frequency to the other frequency.

The problem is you are not including all the needed fields in the search output. I suggest you select ITU Class of Station 1/2 for display in the search results. You will see one record will be FB for base station or repeater and the other frequency is MO for mobile. I would listen to both frequencies but the one you want will be the TX frequency of a Base or Repeater.

73 Eric

 

[ve3tej]

You will have to listen to both frequencies to determine the output.

 

[JRichard]

Here's a little more info using your suggestion.

(TX)152.435000 (RX)154.370000 ITU Station-1 FB

(TX)154.370000 (RX)152.435000 ITU Station-1 ML

 

[DaveH]

Try listing the TX ERP. That is a good sign in most cases which is the repeater output. Oddly, I found the listing (BOIESTOWN, NB-UPPER MIRAMICHI FIRE ) and I don't see the mobile part. The TX power on 152.435 is 19.6dBW (nearly 100W), which is far above what mobile power levels are normally used.

Dave

 

[JRichard]

152.435000 154.370000 FB BOIESTOWN, NB-UPPER MIRAMICHI FIRE 19.6

154.370000 152.435000 ML BOIESTOWN, NB - UMFD HANDHELDS
154.370000 152.435000 ML BOIESTOWN, NB - UMFD EMO MOBILE
154.370000 152.435000 ML BOIESTOWN, NB - UMFD MOBILES
154.370000 152.435000 ML BOIESTOWN, NB - UMFD PORTABLES

I guess it turns out that it's mostly self-explanatory. The 152.435 is the frequency I need to listen for.

One other thing while I'm on this topic. Can somebody explain to me the difference between a listing of FB and FX? Is an FX listing something worth listening for?

Thanks for the help guys.

 

[mikewazowski]

Here's another tip for figuring out which frequency you should listen to: check out the ERP and antenna height. Most repeaters will have a higher ERP and a much higher antenna height then the mobiles on the system.