I am in the process of updating our FCC license for our GPS radios. Does anybody have a clue what you fill in for the emission designator for the license? I found a list of them on a couple of different websites, but the list is pretty technical in terms of what the radios do, and I don't understand it. Our radio is a Topcon TRL35 if that makes any difference.
during my search for Narrowband rules, I found this document:
http://www.comsearch.com/articles/emission.pdf
I have a note written on my hard copy that for our FCC licenses,
our first 4 "characters" for our Narrowband are: 11K2
the first 4 for Wideband are: 19K6.
your existing FCC license should have these numbers listed.
hope this helps, and keep us posted how it works out.
our crews picked up the new ADL radios 2 days ago, got our receivers set up and we're now compliant - glad that part is over.
If I remember correctly, the 19K6 is 19.6 khz wide for the 25khz wideband license and the 11k2 is 11.2 khz wide for the 12.5 khz narrowband. I have seen some that were 20k so it may be radio dependent. It's the width of the frequency being transmitted.
My license is 19k6 and 11k2 like Joe.
James
Yeah, our old license does start out with the 19k6. I called the FCC and they are pretty good about taking calls. The lady said the equipment make should be able to tell you shat the designator should be, but the company that sold us the equipment didn't have a clue.
What is the FCCID shown on the label?
To be completely sure, it would be best to check the FCC's equipment-authorization database.
The label should show an item called "FCCID" or something like that.
If you will post that information, I will help find the equipment authorization and there we will see the emission designator.
I looked through the equipment authorizations issued to Topcon, and I could not find the TRL-35.
[Edit]
Apparently there are still a few working synapses up there, I recalled the name Thomas Chanian, the person who left Pacific Crest and started a company called ArWest Communications that was later bought out by Javad GNSS.
I believe what ArWest called the ArWest AW435BT is the same thing as the Topcom TRL-35.
Is the FCCID TGBAW435?
GB
TRL 35 can be configured to be compliant but your license may need to be modified to be compliant.
Thanks everyone for the info. I checked on the radio and the FCC Id is TBGA435. I just need to figure out the emmsion indentifer that goes with that.
Presuming you meant TBGAW435 and simply dropped the W -
The FCC database includes the Grant of Equipment Authorization for that product.
Based on my limited understanding, I would recommend using an emission designator of 11K2F1D even though the Grant shows the emission designators of 10K4FXW and 10K4G1D for 12.5-kHz channel spacing.
That seems to agree with the information from the FCC web site on Emission Designators - First Symbol where a note says "Whenever frequency modulation "F" is indicated, Phase modulation "G" is also acceptable."
Using the slightly wider 11K2 (11.2 kHz) bandwidth instead of the 10K4 from the Grant will give you "room" to use other-manufacturers products if you replace the TRL-35.
The F1D part also agrees with the emission designators usually shown for other-brand products. It is also consistent with your previous wideband emission designator on your FCC license.
Finally, all indications that license modifications adding the 11K2F1D emission designators have been getting through the FCC without any difficulty.
This advice is worth exactly the $0.00 you are paying for it.
GB
Thanks Glenn, that sounds reasonable. I had found one that listed 11K2F3E, but it wasn't really for GPS equipment. I was pretty sure 11K2F was correct, but wasn't sure what to put for the rest. It was getting a little frustrating, I've done a lot of reading in the last couple of day, but never really could find an answwer. Thanks again for the help.
We had our FCC license for the TRL35 ammended to 11K2F3E
I was going to use that if I couldn't find anything else. To be honeset, I'm not sure it makes a lot of difference.
Mr. Bender -
You should check with whoever handled your license modification and make sure that they understand that your TRL-35 will be broadcasting data, not voice.
As shown on the FCC web site under the topic Emission Designators - Third Symbol a letter "E" in the final place indicates the type of information to be transmitted will be telephony, which would mean voice to me.
Referring to the Designator Examples, apparently the "E" in the far-right position means voice to the FCC as well.
I am pretty confident you need a letter "D" representing data transmission at the end of the emission designator.
That is supported by the information on the Equipment Authorization Grant hyperlinked to upstream in this thread.
Through the past 17 years or so I have looked at literally hundreds of FCC licenses for RTK GPS and without exception those licenses have had emission designators ending with F1D.
Just want everyone to stay out of radio jail!! B-)
GB
