Actually it was used multiple times for the Ascent shot except for they only got it right the third or fifth time because you have to time the camera pan with the landers thruster ratios. They would wire up a camera to the Rover which would then be relayed up to the orbiter.
The lunar roving vehicle wasn’t doing the broadcasting … it wasn’t even there until the last 3 missions.
Actually it was used multiple times for the Ascent shot except for they only got it right the third or fifth time because you have to time the camera pan with the landers thruster ratios. They would wire up a camera to the Rover which would then be relayed up to the orbiter.