... . It has the functions such as the single-channel, multi-channel, all-band scanning, difference-carrying measurement, signal- ... Accurate QAM testing: digital average power,MER, BERSupport multiple DVB mode: 16QAM,32QAM,64QAM,128QAM,256QAMSingle channel/Frequency simulated power ... digital power level, bit error rate (BER), and 22 to 39 dB modulation error rate (MER).Specifications:Channel/Frequency ...