7.0 Test Applications
7.1 Single Channel Measurement
7.1.1 Analog Channel Measurements
7.1.2 Digital Channel Measurements
7.1.3 Constellation Measurements
7.2 Tilt Analysis
7.3 System Scan
7.4 Spectrum Analysis
7.4.1 Setup
7.4.2 Amplitude Measurements
7.4.3 Ingress Measurements
7.4.3.1 Forward Path Ingress
7.4.3.2 Reverse Path Ingress
7.5.1 Setup
7.5.2 Cable Modem Results - DOCSIS 3.0
7.5.3 Cable Modem Results - DOCSIS 3.1/OFDM
7.6 Upstream Signal Generator (USG)
7.7 Installation Check
7.8 Advanced Tools
7.8.2 Sweep Operations
7.8.3 MPEG Operations
7.8.4 Remote Operations
7.8.5 R-Server
7.8.6 TPS Control
7.1 Single Channel Measurement
Overview:
The Single Channel SLM function performs a level measurement of a user-selected frequency or a channel that is defined in the selected
and active channel table. The contents of the Single Channel screen will depend upon whether the selected channel contains an analog or
digital signal.
In analog mode, both video and audio levels including Video/Audio (V/A) and Carrier to Noise (C/N) ratios are indicated. In digital mode,
the average power of the QAM channel is measured and MER and BER performance and other related parameters are displayed.
The channel to be measured can be entered by either tapping on the Channel box or the Frequency box to the right and use the pop up
keypad to enter the channel number or frequency respectively. After the first channel is entered, use the Arrow Up key or Down key to
scroll through the next or previous channel in the channel table. About 3 seconds after the user releases the Arrow Up or Down key, the
measurement will start. CX380S-D3.1. remembers the last channel measured, and upon entry, the last channel number will be used.
The CX380S-D3.1 supports histogram analysis, which records the current minute by second and past 60 minutes by minute.
7.1.1 Analog Channel Measurements
The following measurement information is provided for analog signals:
Channel number (defined in the channel table)
Channel frequency (defined in the channel table)
Video Power Level in dBmV/dBuV including graphic bar indication
Audio1 Power Level in dBmV/dBuV including graphic bar indication
Video/Audio1 ratio in dB
Audio2 Power Level in dBmV/dBuV including graphic bar indication
Video/Audio2 ratio in dB
Summary of Contents for VEPAL CX350S-D3.1
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