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It may be that the freq entered or programmed into it is beyond the expected range of that radio. Need more specific details. Usually probs of this nature involve a voltage controlled oscillator whos voltage varies according to the freq. It needs to be within a certain voltage range between the lowest and highest programmed freqs....if not the unlock message appears. Look up the radio on the net and determine if you have programmed it with the freqs it was designed to operate on.... first. Is it UHF or VHF?
It should not be very significant. The gap between two neighboring channels in AM/SW can, on some radios, be set to 9 kHz or 10 kHz depending on countries. For FM the separation is about 100 kHz or 0.1 MHz. Set the right frequency then use the Lock feature. It will prevent any shift/drift of frequency ( and any other changes) until you unlock.
The instructions for getting into programming mode are on page 18. A synopsis is this:
1) Hold in the PTT button and the MON button while turning on the radio. Continue to hold them in until the radio is no longer making noise.
2) Press the Menu button one time. This is your Freq. Use the plus or minus button to change the freq. Press the menu button to lock in your selection.
3) The next number is your Code. Use the same method to select your code and lock it in.
4) Continue through the menu, making your selections according to the user guide. When you are at the end of the programming cycle the radio will emit a different chirp. When this occurs, shut of the radio and turn it back on normally. You are done programming.
Cloning Procedure: (The content of radio A is to be duplicated into radio B)
1. Turn off radio A and turn on radio B.
2. Connect the cloning cable (NKN6376A) to the Universal Connector of both radio A and radio B.
3. Place the PL switch on radio A to the carrier squelch position for full cloning, or the PL position for partial cloning. Full cloning will duplicate the content of radio A to radio B, except for the deviation and squelch settings. Partial cloning is recommended due to deviation variations from radio to radio. (Later version MT1000's (B model for 6, 16, and 99 channel portables; A model for 8 channel) have partial cloning.)
4. Simultaneously depress the PTT and Monitor button on radio A and hold.
5. Turn on radio A. The green LED turns off. Release the PTT and the Monitor button on radio A (HT600's and older MT1000's (A model for 16 and 99 channel portables) beep when cloning is complete). Turn radios "off and on" to reset.
6. Cloning is complete once the green LED turns off. Release both the PTT and Monitor button on radio A. Turn radio A off and on to reset.
For MDC front covers (NTN5456, NTN5457, NTN5458, NTN5459, and NTN6009B), make sure that radio B is turned on before it is connected to the cloning cable.
All VHF wideband radios (146-174MHz) are "C" model radios. A "C" model radio can be cloned only to/from another "C" model radio. An attempt to clone a "C" model radio to an "A" or "B" model radio will result in an unsuccessful cloning attempt.
Any unsuccessful cloning attempt (depending on operating condition of the radio) will result in one of the following alerts:
1. in receive (rotary radio) - 1600Hz continuous alert tone
2. in receive (display radios) - 88 displayed on LCD
3. in transmit - 1600Hz beeping alert tone
Press hold. Go to the old frequencies. Press L/O twice. First press is a Temporary Lock Out and the second press is a permanent lock out. Then press hold again and enter the new freq and press "E yes" button to enter. To verify it is in your scanner, press HOLD/RESUME button, and you should see the new freq you just entered. Repeat all the above steps above for each new frequency.
Not sure what you want.....VHF band ius approximatly 130mhz to 175 mhz..... in that VHF band there is a commercial VHF band aprox. 155 mhz to 175...... the amateur radio vhf band is aprox. 135 to 150mhz.
With amateur radio, any freq in that range can be used...... with commercial radio the FCC cangive a company any freq. in that range also.
If you are looking for FRS/GMRS frequencies they are UHF freqs not VHF.
So I'm not sure exactly what you want......sounds like you might want to program in FRS freqs into an Icom amateur radio. If thats the case you will need an Icom that will do UHF freqs.
I think there is a problem with the Synthetizer, you will need quilyfied service.
This could be caused when you change frequency, the Synth, can not be able to "produce" the desired freq. caused for a problem in this area, this causes to the radios get PLL UNLOCKED and this could be the way that the radio give an alert to the user.