Hi Milanproda,
Not sure I fully understand your doubts. Please post back if you require more clarification.
The use of past perfect here is to show the timeline of two past events. Past perfect is used for the event that happened first - "success broadcasting his controversial radio program on highly regulated terrestrial airwaves". Simple Past is used for the event that happened after the first event - "opted out of terrestrial broadcasting in favor of the less regulated satellite radio medium"
Milanproda Wrote:If had is used for the double past, then Howard Stern's success happened before he opted out.
I am assuming that when you say double past, then you are referring to an earlier event in the past with reference to a later event also in the past.
Milanproda Wrote:One thing (Stern's success) happened in the past, before another thing in the past (opting out for satelite radio). Is that not the double past?
I will explain this using a fictional time reference:
1939: Stern had success broadcasting his controversial radio program on highly regulated terrestrial airwaves
1943: Stern opted out of terrestrial broadcasting in favor of the less regulated satellite radio medium
To refer to both these events in a single sentence, we need the use of past perfect to show that the first event took place before the second but both of them were in the past.
Hope this helps
Regards
Sunil