VeEX CX380C, Руководство пользователя

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The current channel table is used. The CX380C measures the in-service analog and digital channels to obtain the frequency response
of the HFC networks.
Return Path Sweep
This function verifies the frequency response, tilt and proper operation of the amplifiers. CX380C works in conjunction with the CaLan
3010H+ Sweep System installed at the Headend, enabling a return path sweep up to 204 MHz. CX380C operates as a return path
transmitter, injecting active sweep points. This function verifies the frequency response, tilt and proper operation of the amplifiers.
In the example below, a measurement by the sweep receiver in the Headend while sweep tones are inserted at point 2; the closest
point to the Headend. Save this measurement as reference. Move and insert sweep tones at points 4, 5, 6, and 7, compare results and
verify the frequency response and tilt at each point is relatively flat.
Return Path Sweep
The Return Path Sweep operation on CX380C depends on the test mode selection of either Controller or Responder. The CX380C
operates as a return path signal generator unit if Controller is selected, and a measurement unit if Responder is selected.
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8.1 Sweep Settings
Before using Forward or Return Sweep functions, sweep settings can be configured with all the necessary settings for the Sweep
System. On the CX380C, the Sweep Setup screen can be accessed in one of two ways:
Main Menu<CaLan Sweep<Setup
--OR--
Main Menu<Advanced Tools<In Service Sweep<Setup
Main Setup Menu (Sweep Setup)
CX380C User Manual RevA00 Page 53 of 105