UniTrunker 1.0.0.5 and APCO25

[thadood]

I setup my line in audio levels right for decoding, i tested it with uniscope and tryed it out on an edacs96 system , but the problem is i cant seem to get UniTrunker to see the APCO25 Moto system im trying to decode , ive tryed adjusting line in for different levels to see if maybe it was too loud or to low but still nothing , when listening to the APCO25 control channel it comes in clear, i dont hear any interference or static so im pretty sure im getting a good signal. i just dont know what else to do, if anybody has any thoughts on this or if there's something maybe i didnt do please let me know. Help greatly appreciated... Thadoood *update* at some point unitrunker picked up the system for like 30 seconds and i didnt know it , can any one give me some screen shots of where the audio levels should be adjusted for good decode of APCO25 control channels ? ive read the level up doc i dont know how many times. thanks

 

[SCPD]

Here are some examples with Uniscope.

 

[thadood]

I tryed to adjust the sound levels to match my uniscope with the uniscope pictures using those settings , i got it pretty close but still nothing , it briefly picked up the system today but for less than a minute , and i dont know exactly what i did to get unitrunker to see the control channel. i know im getting a clear signal of the control channel , everything is connected right, but for some reason unitrunker wont pick it up. very aggrivating

 

[SCPD]

Which site and system are you monitoring?

 

[thadood]

Im monitoring the STARNET Project 25 system 1A7 BEE00 Site 101 "Bay City" Control Channel 853.7125

I just checked the FCC ULS system for that control channel and i couldnt find anything out about what type of modulatin thier using.

 

[SCPD]

Im monitoring the STARNET Project 25 system 1A7 BEE00 Site 101 "Bay City" Control Channel 853.7125

I'll be in the area this weekend so I can test this one out directly.

 

[wvscanner]

You might want to try one of the last dos version. In my area, knowing about having the weak signal, and great fall season, I can get 40 to 85 on the dos version while on the windows 1.0.5 it only reads about 10% of the same signal.

 

[thadood]

im going to have some free time this weekend , so ill be able to try and trouble shoot on in a little more , i do have an older version of unitrunker that runs in msdos, ill try to give that a go aswell, we'll see what happens, UniTrunker if you find out anything over the weekend post here and let me know or send me a message , ill be checking back periodically

 

[SCPD]

The system is C4FM. Unitrunker does not work well with this format. The C4FM issue is a work in progress.

However, if you have a PSR500 or PSR600, you can get good decoding results. Here's what I found late Sunday evening from the corner of Avenue K and Highway 35.

 

[thadood]

Ok Great, good work UniTrunker , but i still dont understand what would make the PSR-500 or PSR-600 any better for Decoding the site with unitrunker rather than a simple BCXL-50 or a Pro-97 or something what does the PSR-500 and 600 have that get good decoding results from the site ???

 

[SCPD]

what would make the PSR-500 or PSR-600 any better for Decoding the site with unitrunker rather than a simple BCXL-50 or a Pro-97 or something what does the PSR-500 and 600 have that get good decoding results from the site ???

It's simple. To use a radio like the PRO-97, you have to tap the radio's FM discriminator to get at the signal. With the PSR-500/600 models (and soon the BCD396XT), the radio demodulates the waveform into data and provides it over the serial cable. No discriminator tap and associated signal progressing is required. Until I find time to correct this issue with processing C4FM waveforms via sound input, folks using a discriminator tapped radio to monitor these signals are going to get crappy results.