Tektronix 2721A Sweep Generator, CATV

The Tektronix 2721 A / 2722 A Non-Interfering Sweep System offers cable television (CATV), provides a simple, yet comprehensive tool for verifying and maintaining cable distribution performance from head end to subscriber drop. To do this, the 2721 A / 2722 A sweep system provides the following key measurements: * Swept frequency response * Automatic pilot level measurements * Signal level measurements (SLM function) * AC and DC voltage * Ambient temperature (in degrees F or degrees C) A key feature of the 2721 A / 2722 A system is that swept frequency-response measurements can be made at any time without interfering with subscriber reception of programming. Measurements can also be made on channels that have no carriers present. The 2721 A / 2722 A non-interfering sweep system consists of two instruments. These are: - 2721 A Sweep Transmitter: 5 bis 600 MHz - 2722 A Sweep Receiver: comes with Option 01 - YT1 chart recorder The 2721 A sweep transmitter is installed at the CATV head end and set up for the CATV system's specific channel configuration. Once installed and set up, the 2721 A sweep transmitter continuously sweeps RF test pulses through the selected channel configuration. Since the method of sweeping is non-interfering, there is no interruption of subscriber service. And, because channel sweeping is continuous and unattended, the 2722 A sweep receiver can be taken into the field at any time for frequency-response measurements. To achieve non-interfering sweeps, the 2721 A/ 2722 A sweep system uses RF test pulses rather than continuous frequency sweeps. These test pulses are then injected during the cable signal's vertical blanking interval to avoid picture interference.