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Radiocommunications

Measure power directly from the Motorola Amplifier

Celular Nokia ALL

Celular Nokia ALL

chejofranco2013
hace 5 años
hace 5 años
Good morning to all, I have a doubt, As you can measure power directly from the amplifier of a motorola radio, be it a sm, gm, pro or em, the doubt arises because I have several which do not give me power at the output, but I would like to know at what stage the fault is, which instrument is used because I have a multimeter, a service monitor and a wattmeter only. Thank you for your answers.
rafael camargo p
hace 5 años

hello you need an analog multimeter to look for rf step and to get out of doubt check the consumption should have about 7 amp if you have less to start from the vco

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ricbevi
ricbevi
17.055
hace 5 años
hace 5 años
It depends how you are used to repair, I with an RF probe or better an RF milli-voltmeter I manage. It is as simple as measuring the RF input voltage of a stage and the output to know if it is amplifying or not. The probe can be manufactured by you, I share an image of how it would be and connect it to a multimeter that if it is an old needle of 20K or more, the better. The diodes can be those or any suitable for RF (not a common rectifier) and that supports the maximum voltages to be measured. Regards. Ric. -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- ----------------------------------------- In a digital multimeter you should pay attention to the variation of the digits if it is up or down when measuring, with a needle, you can see if the signal is smaller or larger. I have no idea how much the entrance or exit is while the entrance is less than the exit several times, the stage is going. You must make a database of equipment vs. your probe / multimeter and then you will know how much it should have. As I do not know what you are going to use in making it is impossible to know without guessing. If you want clarifications, you buy a commercial RF Voltmeter something like this would be nice http://www.boonton.com/products/rf-volt-meters/9240-rf-voltmeter and you look at the service manual of each equipment and It is usually indicated in the RF voltages at the input and output. You can also make a database when you receive a good measuring and scoring equipment and then compare when you receive one that fails. The current APs have no more than 2 or 3 steps, so there are at most 6 measurements per device. Luck. Ric.
chejofranco2013
hace 5 años

Ok and if the multimeter is digital is there any problem?
and how much approximately should the amplifier input measure?
Thanks for your help.

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