Need help with Trunker Data on NYS System

[rickey456]

I was uo in the Hudson Valley of NY trying to track the Otisville system on Trunker. Signals were poor- never received a signal better than 49%.

17c [380] was reported as 407.0125 but trunker listed this frequency as f0 [240] and 408.0125 as 17c [380]. It also gave me:
1cc [460] 408.8125
23c [572] 409.4125 and
26c [620] 410.0125

I had CC's on 408.0125, 408.8125 and 409.0125 but there were times when I was tuned to 408.0125 that Trunker showed 408.8125 as the active Data channel. Could this have been because of the low signal strength?

also Trunker showed
000
050
090
0c0
20c which never converted to frequencies. There was activity on all [perhaps excepting 000] but they were all 99 calls. What would these frequencies be?- inputs? They never lit up the same time as the channels with frequencies so I couldn't match them.

Any ideas?

Rickey Stein rickey456@aol.com

 

[mikey60]

By my calculations.....

Base: 407.0125
Offset: 380
Spacing: 12.5 Khz

Channel : Frequency
380(17c) : 407.0125
460(1cc) : 408.0125
524(20c) : 408.8125
572(23c) : 409.4125
620(26c) : 410.0125

Trunker IDs below 380 (17c) can be ignored as they are used to specify the input frequency for the repeater.

Mike

 

[rickey456]

Thanks for the reply- but why would trunker show 407.0125 as f0[240] and not 17c [380] and 408.0125 as 17c?

 

[mikey60]

On a UHF system, trunker will show each channel as two different IDs. The ID below 380 tells the radio the input channel for the repeater, the ID at or above 380 is the output channel of the repeater.

So for 407.0125, the input channel is f0[240] and the output channel is 17c[380]. Usually the input just flashes up quickly and disappears when the output ID comes up in trunker.

Mike

 

[rickey456]

I understand what you're saying but what I don't get is why 407.0125 which should be the base [17c/380] is showing as [f0/240] 'cause if you do the math using 408.0125 which is showing as [17c/380]- the calculations don't work out. The freqs I listed as those put up by Trunker and conform to what was listed in the Database. Could it be the weak signal that is causing a misreading by Trunker?

Also for those frequencies below 17c/380 which should be inputs, why didn't they come up at the same time as the outputs? They only showed up independently and all the messages were 99's.

Is this something about the way the system is configured?

 

[mikey60]

It's possible that the system is not set up to use 380(17c) as the base output channel, and is using multiple tables to operate. Do the settings I gave work on the system? It may be the weak signal, but it doesn't seem like it.

What version of trunker are you working with?

Mike

 

[loumaag]

Is this something about the way the system is configured?

Well it is possible. Suppose you zip up the "MAP", "SYS", and any "C" files and post them here so others can take a look at what you are seeing.