DSD+ Where do I Put in the bandwidth in the batch file?

[XTS3000]

Where/how do I put in the bandwidth (6.25Kkz) for the 700Mhz trunking system?

The readme file says:
"BW=<num>" can be used to select a specific RF bandwidth filter. Units are kHz.

Where would I put 6.25Khz bandwidth? (Changing -b12.5 is not it, needs bandwidth 6.25)

(BTW, I changed the -b12.5 to 6.25 and that's NOT it.)

Below is my batch file - Maybe copy my batch file below and show me exactly where to put the "BW=<num>"
in your reply.

Thanks for your help!

@Echo OFF
C:
CD C:\SDR\Trunking\DSD
START C:\SDR\Trunking\DSD\FMP24 -rc -i2 -b12.5 -o20003 -P0.0 -f774.71875 -g38.6 -wsl400.2
TIMEOUT /T 3
START C:\SDR\Trunking\DSD\DSDPlus -rc -i20003 -v4 -f1
TIMEOUT /T 3
START C:\SDR\Trunking\DSD\FMP24 -rv -i1 -v85 -o20004 -b12.5 -P-1.5 -g38.8
TIMEOUT /T 3
START C:\SDR\Trunking\DSD\DSDPlus -rv -Pmp3 -M32 -g125 -e -i20004 -wch22 -v4
TIMEOUT /T 3

 

[PDXh0b0]

Link to system you are trying to follow?

 

[mcjones2013]

I believe it's changed in the FMP24.cfg file

 

[XTS3000]

I believe it's changed in the FMP24.cfg file

Here is the FMP24.cfg

Not seeing it. Hmmmm

2.4 ; sampling rate (2.4 Msps)
1024 ; spectrum window width
32 ; FFT size (16k, 32k, 64k)
10 ; spectrum update rate in Hz
5000 -6250 7500 12500 15000 25000 100000 ; step size table; units = Hz; negate default
. ; DSD+ path
.\FreqList.csv ; primary frequency list CSV path\filename
.\FreqList2.csv ; auxiliary frequency list CSV path\filename
miles and bearing ; search units (miles or kilometers)
99.9 ; search distance
19.7163 -155.6241 ; search origin

 

[alabamarailfan]

Using the command line option -b12.5 tells the application to start with 12.5 kHz but allows it to change it automatically if it sees fit. To force the application to ONLY use 12.5 kHz and not change it, use the parameter -b-12.5 (notice the extra dash AFTER the b).

 

[XTS3000]

Using the command line option -b12.5 tells the application to start with 12.5 kHz but allows it to change it automatically if it sees fit. To force the application to ONLY use 12.5 kHz and not change it, use the parameter -b-12.5 (notice the extra dash AFTER the b).

I think you're onto something. I changed the -b12.5 to -b-6.25 and it went to 7.6Khz bandwidth. However the audio was really choppy and couldn't hear much. Hmmmm, the plot thickens now.

Thanks for the reply alabamarailfan

 

[Echo4Thirty]

If this is a P25 system of any flavor, the bandwidth needs to be 12.5 kHz. I am not aware of any 6.25 NXDN systems on 700 MHz that would utilize a 6.25 channel.

 

[msoto218]

If you look at the help in FMP24 you will see that 6.25Khz is not an option. You must try -b7 or -b-7. Hope that helps!

-b<kHz> Initial RF filter bandwidth (4, 7, 9.5, 12.5, 22) [-b7]
-b-<kHz> Set initial RF filter bandwidth and ignore hints from DSD+

 

[XTS3000]

If this is a P25 system of any flavor, the bandwidth needs to be 12.5 kHz. I am not aware of any 6.25 NXDN systems on 700 MHz that would utilize a 6.25 channel.

I thought Phase 2 700Mhz systems were 6.25Khz channel spacing and 6.25 bandwidth.

 

[Echo4Thirty]

Its considered 6.25e with the e meaning equivalent. They get this by having 2 talkpaths in a 12.5 kHz bandwidth signal. DMR falls under the same classification. If you had 4 talkpaths on 25 kHz, it too would also be 6.25e

 

[XTS3000]

Its considered 6.25e with the e meaning equivalent. They get this by having 2 talkpaths in a 12.5 kHz bandwidth signal. DMR falls under the same classification. If you had 4 talkpaths on 25 kHz, it too would also be 6.25e

Thank you Echo4Thirty. That makes total sense!

 

[slicerwizard]

You should be using 9.5 or 12.5 kHz bandwidth for P25.