Discussion
Two receivers are compared.
| Parameter | Receiver A | Receiver B |
|---|---|---|
| Noise figure | 4 dB | 10 dB |
| IF bandwidth | 6 kHz | 2.4 kHz |
| Shape factor | 3.0 | 1.5 |
Which is better suited to a crowded band?
Answer: D
On a crowded band interference dominates, so Receiver B wins on the two parameters that matter, a narrower passband and much steeper skirts, despite its poorer noise figure. Receiver A would be the better choice on a quiet band. The comparison is decidable precisely because the environment names which parameter is limiting, and without that context neither receiver is simply better.
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