W&G DMS-1 Data Measuring Set
W&G DLM-20 Data Circuit Test Set
W&G PMP-20 Digital Level & Noise Meter
W&G PS-20 Level Generator
W&G SZU-969 Speech Attachment and 2-Wire switch-over

厂家: 德国W&G

W&G PS-20 : 20Hz - 20kHz, +10(16)...-59.9dBm

W&G PMP-20 :
30Hz - 20kHz, +10...-70(-85max)dBm;
1 Mohm - 100Kohm - 600 oHm.(100 V max);
显示分辨力 0.1dB
9V 电池