I've used one at a radio repair shop -
I've used one at a radio repair shop. There are two versions of this, one is lighted and the other is not. It is not an active meter. The meter case is metal and well built, unfortunately the one that I used had broken switches and the modulation function was broken as a result. Calibration is common for SWR set and modulation set, which confused me, but when the push button switches would not come back up, it was game over. Made in Japan of good quality, I believe the tech use the heck out of it and wore it out. Their is a headphone jack as well but I did not get to try that out. Hard to fine anymore.