4
Downstream Spectrum Setup (612 MHz)
Downstream Spectrum Setup (612 MHz) Continued
Page 1: ...CT 4 Getting Started Guide Please Review CT X Getting Started Guide System Requirements ONX 620 or ONX630 Any forward test points Quick Review CT 4 has a fixed injection of 138 MHz and 612 MHz See Figure 1 Figure 1 Typical injection Frequencies Procedure Measure adjacent QAM Channels to 612 MHz and 138 MHz Ch 88 or 89 and 16 or 17 respectively Log channel power levels for each Measure the peak val...
Page 2: ...table level Ch 16 or 17 power level 24 dBc to 25 dBc acceptable level If any of the above is not true schedule headend visit Connect signal to port 1 of the ONX CATV Home Screen select Channel Check Figure 2 Channel Check Channel Check Setup select Start Figure 2 Channel Check Start ...
Page 3: ...3 ONX builds channel plan and provides measurement for all channels in the plan Figure 2 Channel Check Start Note the Power Level of the selected Channels ...
Page 4: ...4 Downstream Spectrum Setup 612 MHz Downstream Spectrum Setup 612 MHz Continued ...
Page 5: ...5 Downstream Spectrum Setup 138 MHz Downstream Spectrum Setup 138 MHz Continued ...
Page 6: ...Hz 138Mhz Note These are approximate levels to verify leakage levels are within the expected limits If levels are off by 3 dB too low then leakage readings will be cut by Example A 20 microvolt leak would by only 10 microvolts ...
