There are a number of radios out now that have these kinds of "band displays" (formerly known as panadaptors) built into them; most notably the Icom 781, and 746/756/7800 series.

You can also sometimes find old Kenwood gear that would interface into their scope (the SM-220) with a panadaptor interface.

Of course, they have some limitations, and with some, you're kind of stuck to the bandwidth of the receiver in question. To really get the "full" picture, you do indeed want a spectrum analyzer of some sort.

I'm assuming that you have the same one I have, which would be a single-needle meter, with a switch and a knob.

For SWR readings:

Step 1. Put the meter in between the antenna and radio. The plugs on the back should be labeled as to which goes to the antenna and which goes to the transceiver. If you are using an antenna tuner (not likely in your case, I would think), then the antenna tuner needs to come *after* the meter, i.e. between the meter and the antenna.

Step 2. Put your radio on a frequency near the centre of your area of interest. For example, you might use 29.6 if you are interested in 10m FM, or 28.650 (or 28.400 for Tech/Novice) if you are interested in 10m SSB, or 29.15 if you are interested in 10m AM, etc. 146.000 is probably a good choice for all of 2m, because antenna tuning becomes less finicky as you move into higher-frequency bands. Obviously, pick frequencies in whatever band you are trying to set up. Set your radio to CW if it has it, AM would be a good second choice, FM would be third. Do not use SSB for the test.

Step 3. ID yourself. "KK6RRT Testing".

Step 4. Set the switch on the meter to FS/CAL. Key the radio. With the radio keyed, adjust the CAL knob until the needle is perfectly touching the highest mark on the meter. Note that the reading may change when you take your hand off the knob, so you may have to fuss with it a little bit to get it right. Unkey the radio.

Step 5. Flip the switch to SWR. Key the radio to take an SWR reading.

Near the top of the meter will be a scale that reads from 1 at the left to ∞ at the right. This is your Standing Wave Ratio (SWR). It is a measure of the amount of energy that is being reflected back to your radio. If your antenna is properly tuned, then this reading should be fairly low. Generally, readings below 2:1 are good enough, and readings above 3:1 could potentially endanger your radio.

Note that this is not a measure of antenna efficiency. A dummy load will always report a 1:1 SWR, but emits very little usable signal. It is, however, a good practice to get your antenna down below 2:1, or even lower if you feel like putting in the effort. Don't lose any sleep over it, though. Consider yourself accomplished if you get it down to 1.4:1 or lower.

To use it as a field strength meter:

Step 1: Insert the probe antenna into the socket on top labeled FS ANT.

Step 2: Set the switch to FS/CAL.

Step 3. turn the CAL knob all the way up.

Step 4. Take your readings.

Note in the field strength case, that actual measurements are not possible with this meter. It will allow you to measure relative field strength, but you cannot use it to put a definite number on it, such as 300μV/m. You can, however, use it to detect RF in the shack, and you can use it to figure out roughly what the radiation pattern of an antenna system is.

You might also note that there have been a couple of different Micronta meters out there, that have different frequency and power ranges. The readings outside of the specified frequency range may be good, or they may not. As far as I know, none of the Micronta meters are any good at 440MHz, one is good for 222MHz and down (obviously including 2m, 6m and all HF) and several more are only good on HF.

I hope this is helpful.