Question about Cobra LI3900-2DXVP (14 Channels) 2-Way Radio

1 Answer

Stuck on rx mode

Radio seems to be stuck on RX mode. Not Sure what RX mean, but that is what displayed on the radio. Receives transmission, but can't send. Please help.... Thanks

Posted by johnnygren7 on

Ad

1 Answer

eradiostore

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cobra Master
  • 1,658 Answers

Rx is an abbreviation for receive. (Tx is transmit) There are a variety of reasons a radio will be "stuck" in Rx:
1) Another radio in the group is stuck in transmit and you cannot reply if your radio is receiving the other radios transmission.
2) Your radio is programmed for Rx only.
3) Your radio has a Tx problem such as a bad mic, or something covering the mic opening.
4) Your battery is low or bad. It takes more energy to Tx than to Rx.

Best regards.

Posted on Feb 11, 2014

Ad

3 Related Answers

aloha27

Steve

  • 696 Answers

SOURCE: One of my Cobra Microtalk radios is stuck on RX.

Hi!

Almost always, the problem here is that the micro switch for the Push-to-Talk (PTT) button has failed. Your radio should have a warranty, but even if the warranty has run out, it isn't horribly spendy to fix. I'd get in touch with Cobra Electronics, I have heard they're extremely helpful. Try this link and good luck!
https://www.cobra.com/help/

Posted on Jul 06, 2011

Ad

Anonymous

  • 14 Answers

SOURCE: Constant RX mode on cobra microtalk PR3850WX

Sounds like the radio was subjected to electrostatic discharge. If you have your manual, and it describes a way to do a "master reset" on the radio, follow the instructions. This usually involves pushing down on one key while turning the radio on. Otherwise you have to find a licensed dealer for factory service, as there is no way to repair the radio yourself. The use of surface mount technology still confuses many Techs unless they have been to a company's two or three week seminars.

Posted on Jul 24, 2009

cool78259

ruben sanchez

  • 228 Answers

SOURCE: one of my walkie talkie has an RX on the display

depending on what radio you have, they are programmed in different ways, rx means recieve signal

and tx means transmit signal, if you have a mode button, you will have to scroll through it until you

get to the menu that allows you to change the radio transmission. it looks like that radio is only

programmed to receive signals and not transmit. good luck!

Posted on Mar 10, 2011

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Why does my new Honda CB always show RX receiving transmission no matter where squelch is set?


if this is on a Goldwing, it appears that you have a shorted pin int he connector. Disconnect the radio and make sure all of the pins are straight and connecting properly.

Oct 02, 2014 | Radio Communications

1 Answer

What does the "RX" mean on the display? How do


RX means that the radio is receiving a signal, this will put most of the cobra 2-ways into a locked state. many of the cobra models have an issue were after a bit of use, they will seem to receive a "mystery signal" sometimes, carefully taking the radio apart and cleaning out the inside with canned air will help, you may also check the terminals that the batteries connect too, otherwise the SoC (system on a chip microcontroller) likely has an issue.

Jul 02, 2011 | Cobra Electronics microTALK® PR 3850 WX ...

1 Answer

Walkie talkies model gmr325-2 ic;513C-UT914 HOW DO I GET THESE TO TRANSMIT, MY HUSBAND HAS CANCER AND WE NEED THEM IN OUR BEDROOMS AND WHEN I AM OUTSIDE, TK U, TK U


In order to get the most out of your new radio, read this reference guide completely before attempting to operate the radio.

Turning the Radio On and Adjusting the Volume

1) Press and hold the key to turn the radio ON.

2) To change the volume level press the volume/monitor up or down key to increase or decrease the volume level.

3) Press and hold the key to turn the radio OFF.

Adjusting the Sound (Key Beeps)

Your radio emits a beep each time one of the keys (except for the PTT button and call key) is pressed.
The sound of the Key Beep will increase or decrease depending on the volume level setting.

To turn OFF this beep:

Press and hold the call key while turning ON the radio.

To turn ON this beep:

Turn the radio OFF and ON again.

Choosing a Channel

Your GMR325-2 radio has 22 channels you can use to talk to others. In order to speak to someone,
each of you must be set to the same channel.

To choose a channel:

Press the channel/scan up or down key to increase or decrease the channel number displayed.

Channel Scan Feature

Your GMR325-2 radio has a channel Scan feature that allows you to easily Scan all 22 channels. When an active channel is detected, the unit will pause on that channel until the channel is clear. Then after a 2 second delay, the unit will continue scanning.

Pressing PTT button while the Scan is paused on a channel will allow you to transmit on that channel.

To turn ON channel scanning:

Press and hold either the channel/scan up or down key. The channel number on the display
will rapidly cycle through the channels.

To turn OFF channel scanning:

Press either the channel/scan up or down key.

Talking on Your Radio

To talk to others using the radio:
1) Press and hold the PTT button and speak in a clear, normal voice about 2-3 inches away from the microphone.

While you are transmitting the tx icon is displayed. To avoid cutting off the first part of your transmission, pause slightly after pressing the PTT button before you start talking.

2) When you are finished speaking, release the PTT button.You can now receive incoming calls. While receiving, the rx icon is displayed.

Transmitting a Call Alert Tone

Your GMR325-2 radio is equipped with a call tone that will be transmitted when the call key is pressed.

To transmit the call alert tone, press the call key.

The tone will automatically be transmitted for a fixed length of time.

Auto Squelch Feature

The GMR325-2 is equipped with an automatic squelch system which shuts off weak transmissions
and unwanted noise due to terrain conditions or if you have reached your range limit.

Monitor Mode Feature

Your GMR325-2 radio allows you to listen for weak signals on the current channel at the press of a key.

To turn ON monitor mode:

Press and hold the volume/monitor up or down key. The rx icon will blink.

To turn OFF monitor mode:

Press the volume/monitor up or down key. The rx icon will stop blinking.

Automatic Power Save Feature

Your GMR325-2 has a unique circuit designed to dramatically extend the life of the batteries. If there is neither transmission nor an incoming call within 2 seconds, your radio switches to the Power Save mode. The radio is still able to receive transmissions in this mode.

KEYLOCK ON/OFF

Press and hold the call key until the "L" appears. After 1 second, the LCD will return to the channel display.
To exit Keylock on mode, press and hold call again.

Note: While in keylock on mode, it will still receive transmissions.

ROGER BEEP

Roger Beep is a BEEP that is sent to notify the end of transmission.
Roger Beep can be heard through the speaker when Key Beep is on.
Roger Beep is transmitted even if key beep is turned off. However Roger Beep will not be heard from the speaker.

To turn OFF Roger Beep: Press and hold the channel/scan up Key while turning on the radio.

Jun 21, 2011 | Motorola Walkie Talkies 2-Way Radio

1 Answer

I HAVE UNIDEN TWO WAYS HOW DO WE TAKE THE RX OFF


  • You need to get your radio out of monitor mode. To do this just pres the "mon" button for two seconds. Monitor allows you to just listen on that frequency and also receives weaker than normal transmissions while in "monitor" mode as well.

Regards, Tony

May 09, 2011 | Uniden GMR-1088 2-way Radio Walkie Talkie...

2 Answers

I have two uniden GMR1088-2CK radios, If I press the transmit button on the side and speak into the Mike you can see tx appear in the display, the 2nd unit receives the call, rx appears in the display and...


Hello,

What this code indicate mean that your radio have have been compress with power however the can also be an indication of lower power supply but most of the time is always power compress.

What you need to do to solve this code problem is to put off the radio for some time allow it relax, then remove the battery if possible after some time replace it if you are able to remove the battery then put on the radio and operate it.

Good luck.

Jan 15, 2011 | Radio Communications

1 Answer

Radio stuck in RX mode.


Your PTT button is possibly at fault. It may be partially depressed, leaving your receiver open. Behind your PTT button there is an internal PTT button on the componet board. It may be stuck or defective.

Feb 28, 2010 | Radio Communications

1 Answer

Cx80 stuck in rx mode , power cycled, swapped batteries, changed channels, will only swtich to tx when ptt button pressed, otherwise always in rx mode, other radio from package works fine


But thats how a walkie talkie works, it stays in Receive Rx mode UNTIL you press the PTT button,, then it Transmits Tx, and when released it goes back to Rx, receive?

Feb 18, 2010 | Radio Communications

1 Answer

One of my walkie talkie has an RX on the display and you can send but you cannot hear the other person. How can I remove the RX as that seems to be the only difference in them. Thank you


depending on what radio you have, they are programmed in different ways, rx means recieve signal

and tx means transmit signal, if you have a mode button, you will have to scroll through it until you

get to the menu that allows you to change the radio transmission. it looks like that radio is only

programmed to receive signals and not transmit. good luck!

Nov 11, 2009 | Cobra Microtalk 100 FRS Walkie Talkie...

1 Answer

Uniden uh064sx-2 2-Way RX Stuck On


Didyou have any luck resolving this issue? We currently have exactly the same problem

Aug 05, 2009 | Uniden GMR1038-2 (7 Channels) 2-Way Radio

1 Answer

GMR1035-2


Hi,

The RX symbol and static noise would only appear if the squelch is down or if you are receiving something from a transmitter.

Receiving something could mean either an intelligent radio transmission from another comparable unit or this could also be spillover signals from adjacent radio transmitters strong enough to override the squelch settings normally called "splatter". At times, electronic devices could cause this effect such as RFI (radio frequency interference) from units such as a personal computer.

It is also possible that your Monitor Mode is "ON", turning it OFF would possibly resolve the issue To turn OFF monitor mode:Press the vol/mon UP or DOWN key. The RX icon will stop blinking and disappears.

In some cases, a component failure would cause this problem. Your GMR1035-2 uses an Automatic Squelch Feature, this would mean the use of a FM Discriminator Chip for Squelch Control. Most manufacturers uses an MC3357P IC chip for this purpose. This of course would require opening the unit, desoldering the suspected component and solder in a replacement. This would further require that you be familiar with electronic components, circuitry, DVM and a low wattage soldering iron. Should you not be comfortable doing this, perhaps your best bet would be to seek the services of a qualified technician.

Hope this be of some help/idea. Post back how things turned up or should you need additional information.

Good luck and kind regards.

Nov 10, 2007 | Radio Communications

Not finding what you are looking for?
Cobra LI3900-2DXVP (14 Channels) 2-Way Radio Logo

6,479 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra Radio Communications Experts

Brad Brown

Level 3 Expert

18455 Answers

Michael Thomas
Michael Thomas

Level 3 Expert

3053 Answers

Marvin
Marvin

Level 3 Expert

85239 Answers

Are you a Cobra Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...