Yes, I thought of that. But watching the box it appeared to go straight from DS to On 7 mins before programme start, and not via Standby.
There is a thread (see below) that suggests that if the box wakes up more than 6 minutes early for recording then it may not return to deep standby afterwards. These boxes do not have a real time clock and when in deep standby the "clock timing" may lose time and wake up for recording much earlier than expected. The time is then fetched from the broadcast transponder or the Internet and again it is suggested that maybe the box is a bit tardy in obtaining this information or perhaps has already set the after recording mode action before the time is corrected.
If the 6 minute rule is valid with testing you may get variable results depending on how long the box has been in deep standby and how far the internal time has drifted away from reality.
https://www.world-of-satellite.com/...l-not-return-to-Deep-Standby-affter-recording
I have a power timer that that puts the box into standby after 2 hours of not touching the remote. This kicks in when the box is in live TV mode and in this case where the box is left on after recording it would automatically return to standby after 2 hours. I also have a power timer that automatically puts the box into deep standby if the box is in standby for 10 minutes. The 2 hour power timer puts up a 120 second countdown message on-screen and so can be overridden if actually watching live TV. This 2 hour timer is "reset" to zero every time the remote is used.
2 hour standby timer
menu -> timers -> power timer -> press green for add
Timer type = auto standby
Sleep delay = 120 (user configured minutes)
Repeat type = repeated
Deep Standby timer
menu -> timers -> power timers -> press green to add.
Timer type = auto deepstandby
Only active when in standby = yes
Sleep delay = user configured minutes to wait after box goes from standby to deep standby
Repeat type = repeated
The time may/will stay accurate in standby because very little is powered down and access to the transponder/internet can be maintained. In deep standby much of the box is powered down to get the less than 1W power consumption. In practice of many years of putting my box(es) into deep standby every night I don't recall every losing a recording because a box has failed to wake up from deep standby in time. However, my box tends to record something at least every other day even when I'm on a lengthy holiday away from home. If intending leaving the box for a lengthy time (many days+) in deep standby it may be better to organise a power timer wakeup to fetch the epg and time on a regular basis.