FRS GMRS Radio Operating Tips and Technical Explanations: Part VI
Other options available with FRS GRMS radios and how to use them continued.
What you need to know when operating a FRS GMRS radio to comply with the FCC rules.
This is just a general guideline, I recommend looking for yourself at the FCC band plan.
The FRS or Family Radio Service channels are between 8-
The GMRS or the General Mobile Radio Service channels are between 1-
Now for the privacy codes or PL, which is a standard configuration referred to as the CTCSS tons. Always use security/privacy code 1 if in dough. PL code 1 is common to all radio brands. Some brands only have a few of these codes but some have more than 121 plus. So you may not be heard by others if you are not on the same PL code or you may not be heard by them even though you are on the same channel. So as a standard, try code 1 first if you need to talk to a group, lets say in a public event. So just be aware of the CTCSS differences in each radio. Some of the tones on one radio may not be available on other radios. And remember that your brand of radio may have the ability to go to, lets say, PL code 7 and your friends have that same PL code 7 on a different brand of radio. It does not mean they have the same CTCSS ton. So again, default back to PL code 1. I know it is somewhat confusing, but try out your radios first before going out in the field. This, again, could mean the difference of getting help when you need it. And note that using code zero or none at all should open all the codes and not restrict you at all. But will not give you privacy.
You may have heard the term Simplex and Duplex. The FRS radios operate in the
simplex mode. Meaning they receive and transmit on the same channel or frequency.
If you are licensed for the GMRS and want to go mobile and have a base stations with
much more power. Than you can operate, on two channels at one time, one to receive
and one to transmit, this is referred to as Duplex. This means, as you transmit your
signal on a specific frequency goes to a receiving point called a repeater, like
on a mountaintop or building for better area coverage because of its height and line-
By Scott Hensler 0/12/2013
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