Mystery new "game changer" coming in 2015 from Baofeng

[N8OHU]

Actually the low-audio issue was only found on the CS700 - I've tested probably 6-8 manufacturers and none of them have that issue except the Connect Systems model. But even their new CS750 doesn't have low audio anymore.

The AMBE 3000 chip comes in several different renditions and is the latest model compatible with p25 phase 2, DMR, etc. This is the chip used in Motorola, Harris, Tait, simoco, sepura, tytera, and many others. The AMBE 3000 is the premium chip in the marketplace. DVSI is the top manufacturer of vocoder chips worldwide.

Technically, the AMBE 3000 is a Texas Instruments DSP chip with a DVSI firmware burned into it that cannot be changed, and DVSI also licenses the code for use in other processors.

 

[kc5hwb]

Technically, the AMBE 3000 is a Texas Instruments DSP chip with a DVSI firmware burned into it that cannot be changed, and DVSI also licenses the code for use in other processors.

True, but it is the most widely used chip also.

 

[Project25_MASTR]

Actually the low-audio issue was only found on the CS700 - I've tested probably 6-8 manufacturers and none of them have that issue except the Connect Systems model. But even their new CS750 doesn't have low audio anymore.

The AMBE 3000 chip comes in several different renditions and is the latest model compatible with p25 phase 2, DMR, etc. This is the chip used in Motorola, Harris, Tait, simoco, sepura, tytera, and many others. The AMBE 3000 is the premium chip in the marketplace. DVSI is the top manufacturer of vocoder chips worldwide.

Hytera actually had a problem with audio levels on a AMBE 3000 DMR radio. They fixed the issue in the radio upon pre-release but forgot to fix the issue in the accessory connector. Tecnet uses the AMBE 3000 and has (I say that because they haven't fixed it yet) the same low audio issues Connect Systems had. Connect Systems won't actually publish the chip used in their radios so if you begin seeing a pattern with low audio associated with AMBE 3000 in DMR radios (talking DMR here) compared to the standby AMBE+2 (again used in Simoco, higher end Hytera, and Motorola's which have not had low audio issues) then the conclusion could be drawn that there is a algorithm issue in the AMBE 3000 with +2 algorithm that leads to low audio on the encode (decode has never been an issue).

 

[N8OHU]

Hytera actually had a problem with audio levels on a AMBE 3000 DMR radio. They fixed the issue in the radio upon pre-release but forgot to fix the issue in the accessory connector. Tecnet uses the AMBE 3000 and has (I say that because they haven't fixed it yet) the same low audio issues Connect Systems had. Connect Systems won't actually publish the chip used in their radios so if you begin seeing a pattern with low audio associated with AMBE 3000 in DMR radios (talking DMR here) compared to the standby AMBE+2 (again used in Simoco, higher end Hytera, and Motorola's which have not had low audio issues) then the conclusion could be drawn that there is a algorithm issue in the AMBE 3000 with +2 algorithm that leads to low audio on the encode (decode has never been an issue).

Actually, the CS-700 uses the software AMBE +2, just like the CS-750 does. I believe the difference is that the newer radio allows adjustment of mic gain and some other things that were considered to be a waste of time by whomever wrote the firmware for the CS-700.

 

[Your_account]

If someone wants a pricelist for the DVSI USB dongle i have it.