Figuring out the Custom Frequency Table

[Joseph11]

I tried using the guides and searching through the forums, but I still can't figure out how to do it. A new TRS popped-up in my area, and I'm unable to figure out the Custom Frequency Table for it. Here are the frequencies:

500.9125
501.2875
502.7000
507.0000
507.5500
507.7750 - Control Channel

Trunker is reporting 0x254 as an Alternate Control Channel.

Can anyone help me? Thanks.

EDIT: 502.7000 MHz is 0x254.

EDIT 2: It's now saying that 0x294 and 0x2c0 are also Alternate Control Channels.

 

[tracker1]

One Guess

I played with some numbers looking for something that fit the data you supplied. I have a Pro-96 and would try a Motorloa 3600 CC multitable of:

Ch Lo Ch Hi Base Offset Step
-------------------------------------------------------
380 659 500.0000 380 12.5
660 759 503.5000 660 12.5

 

[Joseph11]

I'm not sure if that would work. I figured out one table, so far:

Base: 503.5000 MHz
Spacing: 12.5 kHz
Offset: 380

It works for 507.5500 MHz and 507.7750 MHz, but it makes Trunker and Treport think 502.7000 MHz is 506.2000 MHz. The first two frequencies I list aren't used by the TRS yet, they're the frequencies of the PD's current two channel conventional system (they're on the TRS license). I'll try what you posted, hopefully it would work. Thanks.

EDIT: It doesn't work. It made Trunker detect the Control Channel as 504.2750 MHz. Thanks anyway.

 

[fmon]

What is the Hex of this freq? 507.7750 - Control Channel

Edit: Also, you do need two Base/Offset/Step settings

 

[Joseph11]

The hex value for the Control Channel (507.7750 MHz) is 0x2d2.

 

[fmon]

You have confirmed the answer to my question;

HEX 254 for 502.7000 CC with 500.0000/380/12.5
HEX 1c5 for 500.9125
HEX 1E3 for 501.2875
HEX 2d2 for 507.7750 CC with 503.5000/523/12.5
HEX 294 for 507.0000
HEX 2c0 for 507.5500.

-------------------------------------------------------
Change Tracker 1's solution to:
380 522 500.0000 380 12.5
523 759 503.5000 660 12.5

 

[Joseph11]

That doesn't work, Trunker is seeing the Control Channel as 504.2750 MHz now. Did I type my Trunker map file correctly? Here it is:

500.0000,0.0125,17C
503.5000,0.0125,294

EDIT: Trunker is seeing 502.7000 MHz correctly now, but 507.7750 MHz is still wrong.

 

[fmon]

Oops, I was struck by the start with lowest freq syndrome instead of starting with the base freq when counting channels please change
380 522 500.0000 380 12.5
523 759 503.5000 660 12.5 (660 in this line was in error anyway)
to
380 594 500.0000 380 12.5
595 759 503.5000 595 12.5

 

[Joseph11]

That's not working either, this what I put into the map file:

500.0000,0.0125,17C
503.5000,0.0125,253

It's seeing the CC as 505.0875 MHz. Anyway, I think I did figure it out. I think this is correct:

500.0000,0.0125,17C
504.5000,0.0125,1CC

Does it look correct?

EDIT: It's not correct. It's seeing 502.7000 MHz as 506.2000 MHz, again.

 

[EricCottrell]

Hello,

I think you skipped a subtraction on the second range.

502.7000 0x254 Alternate CC
507.0000 0x294
507.5500 0x2c0
507.7750 0x2d2 CC

Trunker Map file
500.000,0.0125,17c
507.000,0.0125,294

Pro96 Table
380 659 500.000 380 12.5
660 759 507.000 660 12.5

73 Eric

 

[Joseph11]

OK, I think those are correct. It's seeing the Control Channel on the proper frequency. I'll post if it works 100% when I hear the CWID.

 

[Joseph11]

It's correct, thanks everyone. I posted them on my site at this link.

 

[fmon]

Great! Looks like Trucker1 had everything correct except the second Base. Why don't you submit the data to these pages also? Though Eric may have already taken care of that.

Eric, How did you come up with the Base 407.0000? " I think you skipped a subtraction on the second range."
Edit: make that 507.0000 vs 407.0000

 

[Joseph11]

I don't want to submit it to RR until I get more information on it. There's new talkgroups poping up every few hours, I'll wait until things calm down. Thanks again, everyone.

 

[EricCottrell]

Great! Looks like Trucker1 had everything correct except the second Base. Why don't you submit the data to these pages also? Though Eric may have already taken care of that.

Eric, How did you come up with the Base 407.0000? " I think you skipped a subtraction on the second range."
Edit: make that 507.0000 vs 407.0000

Hello,

It looked like the base frequency of range two was determined by taking the hex code of the channel and subtracting 17c from it instead of 294.

502.7000 0x254
507.0000 0x294 <- These numbers can be used as the second base frequency and the second "offset" or "channel"
507.5500 0x2c0
507.7750 0x2d2

So 0x2c0 - 0x294 = 0x2c = 44
44 x 0.0125 = .5500
.5500 + 507.000 = 507.5500

I did not submit to the database as I have not actually monitored the system.

73 Eric

 

[fmon]

Thanks,
Still learning.