Garbled reception in digital frequencies,

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Check the position of the mode selector switch. You may be receiving a SSB (single side band) transmission that is not on the exact same frequency as you or, your radio is in AM or FM mode. You will need to select either USB or LSB (upper or lower side band) and vary the clarifier knob until the sound becomes intelligible. If the sound does not become clear, try the other side band and repeat varying the clarifier knob.

Conversely, if you are in USB or LSB mode and there is a transmission on AM or FM, it will have the same garbled sound. Try changing the mode to AM and the FM. If it does not become clear, it is likely a SSB transmission and you are not on the exact same frequency of the transmission you are hearing. Vary the clarifier knob until it becomes clear - or change to the other side band if needed and try the clairfier again.

The short story is that you must be in the same mode and on the same exact frequency. When in AM or FM, this is less of a problem as these are much more wide banded signals than SSB signals.

The 2990 is really a 50 watt 10 meter amateur radio - but is geared to CBer's as it is easily modified to work in the CB frequency range and the so called "free band" between USA's CB (11 meters) and worldwide amateur 10 meter bands. Be careful transmitting this radio on CB frequencies as it violates FCC rules for power output there - and transmitting in the 28MHz - 29.7MHz requires a valid amateur radio license. Fifty watts on ham frequencies is tiny compared to the 1500 watts permitted. Why not get your ham license (here's how) and leave the "Chicken Band" (and all it entails) behind. You won't miss it!

I hope this helps and good luck!

For a comprehensive database of active frequencies and systems in your area, and a lot of other useful scanning information, visit:

www.RadioReference.com

Bill B.
Listening in since the 60's

The problem isn't with your microphone. I'm using a Shure PG-48 Professional Stage Mic through an analog mixer board into a Soundblaster X-Fi Fatal!ty and still get garbled transmissions, but only on Google Talk.

Google Talk is still in it's early stages, so a lot of bugs still need to be worked out. Also, your internet connection speed has a lot to do with it. When I moved to a city that had T3 internet, my garbled transmissions were fewer.


Hope that helps!

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/cameron_463100ffd54b591d

One problem with digital television is that the carrier frequency of the channels was shifted to a higher frequency vs the old standard . These allotted frequencies require a whole lot more output power at the stations as well as they follow a straight line and the bounce (reflect) off of natural objects such as tree leaves, rain drops moisture, power towers etc. In other words unless you live right next to the transmission tower, you get a lousy picture. Since it is a digital signal, and your receiver does not collect more than a significant portion of the transmission signal, it cannot render the picture so, drop outs causes loss of signal and no picture at times.

That is why most people go to cable or satellite to get a continuous signal.

I would say that unless you put up a good active antennae, you will not get a decent picture. Even then you will not be satisfied. The stations will have to do a lot more work on their signals and up there power levels to compete with cable, but hey, they don't care about their over the air signal since they can sell their signal to the cable operators for lots of bucks and reach more eyes for their advertisers.

This radio will only work on analog trunked systems, if it is a digital or P25 system, you need to upgrade to a digital scanner like the PRO96, or newer.

You have to program it TRUNKING mode when you enter the control channel frequencies. It is decoding okay as the MO shows motorola control channel and +DG means digital decoded and an OPEN group. You need to press the 'trunk' button everytime a talkgroup comes up that you want it to remember for future 'closed' group (-DG) talk groups. I suggest you go to 'RadioReference DOT com" and there are many forums there for your radio, as well as one or two YAHOO GROUPS specifically for your scanner. 73's

This scanner only monitors 2 of the 3 types of trunking systems. There is no digital voice inversion. There is an AGC control for the digital voice to try either way DG (on) or Dg (off) There is software you can buy to program the PRO96 from Don Starr. There are two Yahoo GrOUPS you can join to discuss this radio, in addition to forums on RadioReference DOT com.
73's

MO is for monitoring MOtorola trunking systems and will only work if you have programmed a system into your scanner. Most fire departments are using conventional, (FM) transmissions, not trunked systems - mainly so that volunteers and neighboring departments can follow the action and respond if needed. For a comprehensive database of active frequencies and systems in your area, visit:

www.RadioReference.com

Need the manual for your scanner? You can download and print it here:

http://scancat.com/OnLineHelp/OEM_Radio_Owners_Manuals/RadioShack-OlderManuals/Pro-96/pro96.pdf

Bill B

Sorry, but by law your scanner is not capable of receiving cellular frequencies, and there is no modification that can enable such reception. Don't feel too disappointed though, as nearly all cellular transmissions are digital now, and that's a mode that your scanner could not decipher even within its frequency coverage.