Signal conditioning device with attenuated fail-safe bypass

A cable television (CATV) system for maintaining a radio frequency (RF) strength level, the CATV system comprising:

• a signal conditioning device operative in a plurality of states, the signal conditioning device comprising:
• a circuit comprising a first end, wherein the first end receives an incoming RF strength level from a premise, and a second end,
• wherein the second end sends an outgoing RF strength level to the CATV system;
• a controller for periodically determining whether power is supplied to a signal conditioning device, and based on the determination, a transmission path of the circuit is switched between a first signal path and a second signal path;
• wherein the first signal path applies a value of variable adjustment by a variable adjustment device to the incoming RF strength level in a power-on state, and controllably adjusts a value of a non-volatile adjustment in the second signal path to match the value of variable adjustment in the first signal path by communicating between the variable adjustment device and a non-volatile adjustment device, wherein the non-volatile adjustment is maintained without power being supplied to the signal conditioning device;
• a switching device for switching to the second signal path when power is determined not to be supplied to the signal conditioning device;
• and
• wherein the second signal path applies the value of the non-volatile adjustment to the incoming RF strength level in a power-off state, and
• wherein the non-volatile adjustment is controllably adjusted such that the difference between the incoming RF strength level and the outgoing RF strength level in the power-on state is maintained to be the same as the difference between the incoming RF strength level and the outgoing RF strength level in the power-off state.

A method of maintaining a level of strength of radio frequency (RF) signal traffic between a first end and a second end of a transmission line, said method comprising:

• periodically determining whether power is supplied to a signal conditioning device, and based on the determination, the RF signal traffic is switched between a first signal path and a second signal path;
• inserting an amount of loss to the RF signal traffic by a variable attenuator in the first signal path when power is determined to be supplied to the signal conditioning device;
• periodically assigning the amount of loss, applied to the RF signal traffic in the first signal path, to a non-volatile attenuator in a second signal path by communicating between the variable attenuator and the non-volatile attenuator;
• periodically storing the amount of loss assigned to the non-volatile attenuator when power is determined to be supplied to the signal conditioning device;
• switching to the second signal path when power is determined not to be supplied to the signal conditioning device;
• maintaining the level of strength of the RF signal traffic, when power is determined not to be supplied to the signal conditioning device, by inserting, to the RF signal traffic in the second signal path, the amount of loss that was assigned and stored by the non-volatile attenuator in the second signal path.