Take a look at your scanner manual, then click the first system he linked, then look for Sacramento Co Hospitals section.
Well, if it's true they are still on the analog system then the OP actually wants the
second system I linked to:
https://www.radioreference.com/apps/db/?sid=4499
The OP says, "I am a noob, so what would the frequency be 853....etc. not sure what the talk group number means."
This means they are on what is called a 'trunked radio system', which essentially is a small pool of frequencies that can be used by many different agencies. It's all controlled by computer so they can share the frequencies without interfering with each other. Each agency is assigned one or more 'channels' that are known as 'Talk Groups'. You need a scanner that is capable of monitoring trunked radio systems, that understands the commands sent out by the controlling computer so the scanner knows which frequency to tune when your Talk Group of interest is active. You can not just enter in a frequency and listen. More on the basics of Trunking can be found here:
https://wiki.radioreference.com/index.php/Trunking_Basics
Keep in mind, if you are shopping for a scanner, that eventually the hospital will in all likelihood transition over the the new digital p25 system. So you should be looking for a p25 capable scanner so you can continue to monitor when that happens. All the current p25 scanners can also monitor the older analog system they are apparently currently using.
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