... meter1. integration, noise statistics, noise acquisition, noise frequency analysis2. built-in 1/1 frequency spectrum filter, RS-232C connector3. equipped with printer to ... /1 frequency intervalcentre frequency: 31.5Hz,63Hz,125Hz,500Hz,1kHz,2kHz,4kHz,8kHzMeasured data automatic storage500 teams single team+50 teams filter+4 ...