Analog channels: Signal level measurement on video carrier
Digital channels: Channel power measurement by integration through channel bandwidth
MER (Modulation Error Rate) measurement range: 26 dB to 40 dB
BER (Bit error rate) measurement range: 10 E-2 to 10 E-8 (low resolution) E-9 (High resolution), E-10 in Continuous mode
Constellation diagram: DVB-QAM signals (Annex A/B/C) and DOCSIS/Euro-DOCSIS
Modulation type: QAM 16/32/64/128/256 ITU J83 annex A/C, QAM 64/256 ITU J83 annex B and QPSK
Digital channel power: Channel power measurement, carrier/noise, BER and MER
MER is essential for determining digital signal quality
Data logger: Acquire and internally store required measurements for later review
Print or transfer data logger measurements to PC
Scan: See all channels of selected channel plan graphically with associated signal levels
MARKER can be placed on any channel in order to find frequency or signal level
SPAN and REFERENCE LEVEL can be changed in order to adapt presentation to user’s test requirements
Constellation: Constellation diagram allows graphic evaluation of received signal quality; aspect of on screen diagram will depend on digital transmission characteristics
Spectrum Analyzer: Essential to solving cable modem related problems and very helpful for interference and noise troubleshooting, both in forward and return bands
HOLD function maintains MAX and MIN values: Helpful in identifying interfering signals, for example, in return band
Return path: Also includes return path spectrum Analyzer with max hold function for testing of cable modem transmission at subscriber premises, allowing to test upstream generator of subscriber cable modem
Tilt: Provides graphic and numeric representation of absolute level of any 4 defined pilot frequencies and differences between two
Intermodulation (CTB/CSO): Composite Triple Beat (CTB) and Composite Second Order (CSO) are indications of level of interference in television channel generated by intermodulation of signals from other channels (usually, other channels from same system)
Over certain level CTB and/or CSO interference becomes visible on television signal
