Test system with return sweep level setting

A test system comprising:

• providing a conditioning circuit having a radio frequency input jack and a radio frequency output jack;
• cabling a cable modem termination system to the conditioning circuit including coupling the radio frequency input jack and the radio frequency output jack;
• signaling an initial ranging request to the cable modem termination system including initializing an interface device;
• and
• determining a transmission power limiter by the conditioning circuit monitoring a network for detecting a cable modem termination system response to the initial ranging request including writing a memory with the transmission power limiter for each of the interface devices.

A test system comprising:

• a controller unit;
• a cable modem termination system connection to the controller unit for sending an initialization request;
• and
• a transmission power limiter determined by the controller unit includes a network connection for receiving a response to the initial ranging request.