... 16,32,64,128 and 256 QAM constellation display with zoom, average digital power level, bit error rate (BER),and 22 to 39 ... db modulation error rate (MER). General specifications:Audio Output Built- ... MHzRY-S1127D 5MHz to 870 MHzRY-S1127Q 46MHz to 870MHz,with QAM functionRY-S1127DQ 5MHz to 870MHz ,with QAM function. CATV Signal Level Meter