Table 9-7 shows the relationship of tap losses and insertion losses of 4-port and 8-port multitaps over the frequency range.
Tap-loss values may vary slightly from one manufacturer to the other. For instance, a 23-value tap with 8 ports may be a 24-value tap with another manufacturer. Generally, it is possible to substitute one value for another. But before doing so, assure yourself about the +1.0 dB tap-loss variation specification.