It turns off after 10 seconds of inactivity and comes on again when some button is pressed or frequency is acquired. The M1 has only one input, and is incapable of period, ratio, and interval measurements. In parallel with all the above input selections, two switches let you operate in either of four modes. Operates as described above. This is the single mode of the original Model 3000.
Meter shows updated values even if it's counting noise.
Computer logic looks for meaningful os- cillations, providing a new frequency value only if a legitimate count is acquired. A higher level of filtering can be selected by holding down Button 1 during power up. Same as mode 10 except nothing happens until you arm the system by pressing Button 2. A the second most recent, and B the third most recent. When a fourth value is snagged, the value in B is lost.