Digital TV Signal Strength Meter (Redwood City)

I am looking to borrow a digital TV signal strength meter to adjust my OTA antenna. The photo is just an example.

For months, I have had multiple channels coming in clearly and as of this past weekend, several of them have lost their signal. Not sure if it was the high temperatures, or some something else, but I have been unsuccessful in resolving the issue.

If you have a meter that I can borrow over a weekend I would sincerely appreciate it!

Thanks!