Zhengzhou TV Signal Level Meter which brand of good quality? [Zhengzhou City Department instrumentation firm] Zhengzhou City Department instrumentation firm Address: Erqi Sun Star City Place East West Street, 19th Floor, A3 0371 -66,959,363 Contact; Dujing 13597018197 QQ; 1142689522 Website: http: / / www.huike17.com Products: 1. Accurate detection and analysis QAM performance indicators - average power, MER, BER. (2) support for multiple DVB mode: 16QAM, 32QAM, 64QAM, 128QAM, 256QAM. 3 Wide bitrate settings: 1MS/S-7MS/S. 4. QPSK COFDM power detection. 5 built-in digital and analog two channel table, applicable to any network detection. 6 analog television comprehensive index detection - level, V / A, C / N, the slope, the mains voltage measurement. 7 high-definition, wide temperature LCD high-brightness blue backlit display, with good visual effect. 8 fast charging, long continuous working time is greater than 8 hours, for a variety of measurement needs. Product attributes: Frequency range: 46MHz ~ 870MHz Demodulation form: DVB-C/ITU-T J.83-Annex A Support: 16/32/64/128/256QAM digital average power: 30 dBμV ~ 110 dBμV Accuracy: ± 2dB Bandwidth: The user can set Symbol Rate: 1MS / S ~ 8MS / S modulation BER MER: 22dB ~ 39dB Accuracy: ± 2dB BER BER: R-S 10-3 to 10-8 before the frequency range: 46MHz ~ 870MHz Level: 30dBμV ~ 120dBμV Accuracy: ± 1.5dB Input impedance: 75Ω Other notes: Power supply ● Battery: 7.2V 1600mAH NiMH battery ● Charger: AC 90 ~ 240V 50/60Hz ● Working time: more than 8 hours / fully charged ● Charging time: more than 3.5 hours