What value should be set for the interstage equalizer if the amplifier tombstone indicates no value and the output slope is 7 dB?

Setting the interstage equalizer to the default factory value is the most appropriate choice when the amplifier tombstone indicates no value and the output slope is specified as 7 dB. The default factory value is typically designed to accommodate a range of operating conditions, ensuring a balanced performance for the system.

In scenarios where specific calibration data is absent, the factory default serves as a reliable starting point. It reflects the manufacturer's recommended settings, which are optimized for typical application scenarios and can often provide satisfactory performance without the need for further adjustment.

Utilizing the default factory value also helps to maintain consistency in system behavior, especially if multiple units are involved. This is crucial in ensuring that all components work harmoniously within the designed limits of the equipment.

Adjusting to a custom value would normally require extensive testing and expertise, as it would need to cater specifically to the individual characteristics of the system's performance and any unique requirements dictated by the installation environment. Therefore, opting for the default value helps mitigate risks associated with improper tuning while ensuring functionality.