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Just Digital or Digital Encrypted. Sound Samples Attached

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MVUSA

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#1
Looks like "they" upgraded their equipment. I have a BCT15X analog scanner.
I know they went digital, I just don't know if it is encrypted also.
I would like to know this before I waste my time upgrading to a digital scanner and finding out it's encrypted as well.

Sound samples are attached. Hopefully you can tell if it's just Digital or Digital Encrypted.

Thanks for the help.
 

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#4
Thats MOTOTRBO Digital and i dont know of any quality program to listen to MOTOTRBO.
Its not P-25 but i think it can be encrypted(Not 100% on that).
There is a program online but it requires a computer to decode it and i dont think its worth the hassle.
Lake Wildwood is a homeowners assn deal, i thought it was in Yuba County but i havent looked at the map.
I used to live near Bullards Bar to the west in the Brownsville/Challenge area in the 60's & 70's scanning was so easy then (All VHF Low and High band with many users on same freq)
 

MVUSA

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#5
Thats MOTOTRBO Digital and i dont know of any quality program to listen to MOTOTRBO.
Its not P-25 but i think it can be encrypted(Not 100% on that).
There is a program online but it requires a computer to decode it and i dont think its worth the hassle.
Lake Wildwood is a homeowners assn deal, i thought it was in Yuba County but i havent looked at the map.
I used to live near Bullards Bar to the west in the Brownsville/Challenge area in the 60's & 70's scanning was so easy then (All VHF Low and High band with many users on same freq)
Thanks for the info.
Guess it may be possible to use the discriminator tap and software.
Of course if it's not encrypted.
Definitely a major pain...
 
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#7
The program is DSD.
Here is a You-Tube sample of the decoded MOTOTRBO and you can see what a hassle it is if you want to dedicate equipment and time to it, but i have noticed since about Jan or Feb this year there are maybe 5 new or changed over systems from WFM Analog to Narrowband MOTOTRBO since the 2013 Narrowband deadline is coming up users i would guess have been talked into buying new MOTOTRBO systems to replace the old WBFM radios.

Sample:

MOTO TRBO decoding on PC with DSD - YouTube
 
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#8
Here is the website for the DSD MOTOTRBO decoder download i was given a while back.
I never tried it and the Tech i know spent a little time trying to make it work, i dont know if he was successful or not.

Your supossed to be able to decode other digital formats as well with this program.
Your on your own as i dont have any input since i havent tried it yet.

Website:

https://github.com/szechyjs/dsd



Here is what your supposed to be able to decode with this program:


[Digital Speech Decoder 1.4]
[Copyright (C) 2010 DSD Author]
[Permission to use, copy, modify, and/or distribute this software for any]
[purpose with or without fee is hereby granted, provided that the above]
[copyright notice and this permission notice appear in all copies.]

GPG Key ID: 0x3F1D7FD0 (74EF 430D F7F2 0A48 FCE6 F630 FAA2 635D 3F1D 7FD0)


DSD is able to decode several digital voice formats from discriminator
tap audio and synthesize the decoded speech. Speech
synthesis requires mbelib, which is a separate package. DSD 1.4.1
requires mbelib 1.1 or later.

Supported formats in version 1.4.1:

P25 Phase 1 Widely deployed radio standard used in public safety
and amateur radio.

Support includes decoding and synthesis of speech,
display of all link control info, and the ability to save
and replay .imb data files

ProVoice EDACS Digital voice format used by public safety and
amateur radio.

Support includes decoding and synthesis of speech and
the ability to save and replay .imb data files.
Note: not enabled by default, use -fp to enable.

X2-TDMA Two slot TDMA system currently being deployed by several
public safety organizations. Based on the DMR
standard with extensions for P25 style signaling.

Support includes decoding and synthesis of speech,
display of all link control info, and the ability to save
and replay .amb data files

DMR/MOTOTRBO "Digital Mobile Radio" Eurpoean two slot TDMA standard.
MOTOTRBO is a popular implementation of this standard.

Support includes decoding and synthesis of speech and
the ability to save and replay .amb data files.

NXDN Digital radio standard used by NEXEDGE and IDAS brands.
Supports both 9600 baud (12.5 kHz) and
4800 baud (6.25 kHz) digital voice.

Support includes decoding and synthesis of speech and
the ability to save and replay .amb data files.

Development (no speech) support only:

D-STAR Amateur radio digital voice standard

Development support only. DSD recognized frames and can
extract the voice bits but speech is not yet decoded.
D-STAR likely uses a version of AMBE not yet supported by
mbelib. The voice bit interleave pattern also needs to be
determined.
Note: not enabled by default, use -fd to enable.

Unsupported formats in version 1.4 considered for future development:

P25 Phase 2 This is not yet a published standard. Full support is
expected once the standard is published and there are
systems operating to test against. Phase 2 will use
a vocoder supported by mbelib.

OpenSKY It is possible that the four slot version uses a vocoder
supported by mbelib. The two slot version does not.

Supported demodulation optimizations in version 1.4:

C4FM Continuous envelope 2 or 4 level FSK with relatively
sharp transitions between symbols. Used by most P25
systems.

Optimizations include calibrating decision points only
during sync, 4/10 sample window per symbol, and symbol
edge timing calibration.

GFSK Continuous envelope 2 or 4 level FSK with a narrower
Gaussian/"raised cosine" filter that affects transitions
between symbols. Used by DMR/MOTOTRBO, NXDN and many
others. Noisy C4FM signals may be detected as GFSK

but this is ok, the optimization changes will help with
noisy signals.

Optimizations are similar to C4FM except symbol transitions
are only kept out of the middle 4 samples and only the
middle two samples are used.

QPSK Quadrature Phase Shift Keying (and variants) used in
some P25 systems and all known X2-TDMA systems. May be
advertised under the marketing term "LSM"

Optimizations include continuous decision point
calibration, using middle two samples, and using the
symbol midpoint "spike" for symbol timing.
 
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#9
One more thing i found that confirms the change along with the link Antfreq posted.

WPQF411 LAKE WILDWOOD ASSOCIATION 03/22/2012

000452.22500000 1 1 1 FB2 11K2F3E, 7K60FXE Repeater
000457.22500000 2 1 1 FX1 11K2F3E, 7K60FXE Base Rptr Input
000457.22500000 3 1 1 MO 11K2F3E, 7K60FXE Mobile Rptr Input
000461.02500000 4 1 1 MO 11K2F3E, 7K60FXE Mobile Simplex
000463.37500000 4 1 2 MO 11K2F3E, 7K60FXE Mobile Simplex
000463.55000000 4 1 4 MO 11K2F3E, 7K60FXE Mobile Simplex
000464.60000000 4 1 3 MO 11K2F3E, 7K60FXE Mobile Simplex
000464.77500000 1 1 2 FB2 11K2F3E, 7K60FXE Repeater
000464.77500000 3 1 2 MO 11K2F3E, 7K60FXE Talk-Around
000469.77500000 2 1 2 FX1 11K2F3E, 7K60FXE Base Rptr Input
000469.77500000 3 1 3 MO 11K2F3E, 7K60FXE Mobile Rptr Input

Here are the Emissions Designators:
NARROWBAND (11K2F3E)
MOTOTRBO (7K60FXE)
 

MVUSA

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Messages
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Location
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#11
One more thing i found that confirms the change along with the link Antfreq posted.

WPQF411 LAKE WILDWOOD ASSOCIATION 03/22/2012

000452.22500000 1 1 1 FB2 11K2F3E, 7K60FXE Repeater
000457.22500000 2 1 1 FX1 11K2F3E, 7K60FXE Base Rptr Input
000457.22500000 3 1 1 MO 11K2F3E, 7K60FXE Mobile Rptr Input
000461.02500000 4 1 1 MO 11K2F3E, 7K60FXE Mobile Simplex
000463.37500000 4 1 2 MO 11K2F3E, 7K60FXE Mobile Simplex
000463.55000000 4 1 4 MO 11K2F3E, 7K60FXE Mobile Simplex
000464.60000000 4 1 3 MO 11K2F3E, 7K60FXE Mobile Simplex
000464.77500000 1 1 2 FB2 11K2F3E, 7K60FXE Repeater
000464.77500000 3 1 2 MO 11K2F3E, 7K60FXE Talk-Around
000469.77500000 2 1 2 FX1 11K2F3E, 7K60FXE Base Rptr Input
000469.77500000 3 1 3 MO 11K2F3E, 7K60FXE Mobile Rptr Input

Here are the Emissions Designators:
NARROWBAND (11K2F3E)
MOTOTRBO (7K60FXE)
Thanks for all the info.
Discriminator out and software decode is most likely to much hassle.
Even if it did work, and not encrypted.
 
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#12
It's really not all that hard as he makes it out to be (and he hasnt even tried it). I had the tap done and software running in less than 15 minutes.
 
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