Welcome, Guest
Username: Password: Remember me

TOPIC: EESDR3 Difference between power setting in BM and power correction?

EESDR3 Difference between power setting in BM and power correction? 22 Nov 2021 04:45 #1

  • danielwee
  • danielwee's Avatar
  • OFFLINE
  • Posts: 209
  • Thank you received: 29
I noticed that with EESDR3, there is a power setting in the Band Manager for each band that is specified in 0-100%. This is in addition to the power correction option in the options menu. Are these identical or do they represent completely different but linked settings?

Are they cumulative? So if I have 50% set in 20m for both power correction and the Band Manager, do I end up with 25%?

Another related question - is the power correction a digital function or analog function? Let's say I reduce the output to 10% in the Power Correction settings. Do I now get the full resolution of power control from the drive within this 10% so that 1% of drive will low give me a hundredth of the 10% of the output power? If it is digitally implemented, I would suppose that the drive resolution is limited by the power correction setting. I ask this because when I operate QRP, and I use power correction to limit the maximum power to 5W, I want to know if I have the full resolution of control in the drive that gives me up to a true 1% of 5W control. The same also applies to the Band Manager setting.


Screenshot2021-11-22123901.png


Screenshot2021-11-22123823.png
The administrator has disabled public write access.

EESDR3 Difference between power setting in BM and power correction? 22 Nov 2021 05:04 #2

  • danielwee
  • danielwee's Avatar
  • OFFLINE
  • Posts: 209
  • Thank you received: 29
Okay, to answer my own question - it seems that all the power settings are linked but separate:-

1. Drive power control
2. Power setting in Band Manager
3. Power correction in options

All will impose some restrictions on the output power as displayed in the meter. None of them will allow you to set a power level of more than 100%. I've not actually put a meter to this so I can't say if the correction is to the actual power output or simply to the meter indication. I would assume it would not be about a meter calibration since we cannot go beyond 100%.

These limits are active all the time once they're set. It would be great if the Band Manager power setting only applied when the "PA" amplifier was activated. That way we can have one power setting when using the amplifier and another when the amplifier is bypassed. If there is already a way to do this, I've not found it yet so would appreciate any hints.

*It has been mentioned before but in case some may not know, the percentages don't work linearly. 50% does not correspond to 50% of the output power. To get half the output power, you're probably looking at a setting around 80% or so. Additionally, the percentage impact in the Band Manager power setting is not exactly the same as that in the power correction options. So, 80% in BM is not the same as 80% in power correction, which may be different from 80% in the Drive setting. You just have to play around with it a bit to see how much it affects the output power. I suspect the BM setting might be closer to the Drive setting but have not verified this empirically.
Last Edit: 22 Nov 2021 05:11 by danielwee.
The administrator has disabled public write access.
The following user(s) said Thank You: Rome

EESDR3 Difference between power setting in BM and power correction? 22 Nov 2021 06:36 #3

  • Rome
  • Rome's Avatar
  • OFFLINE
  • Quod Licet Jovi Non Licet Bovi
  • Posts: 1054
  • Thank you received: 528
Hello,
You are correct.
Power corrections in Options are firmware settings, they have the highest priority.
Then goes Power column in BM, these are software settings with lower priority.
Then goes Drive slider.
Роман, Roman
Expert Electronics
The administrator has disabled public write access.

EESDR3 Difference between power setting in BM and power correction? 22 Nov 2021 11:14 #4

  • danielwee
  • danielwee's Avatar
  • OFFLINE
  • Posts: 209
  • Thank you received: 29
Thanks Roman. Can I check if the power corrections are done analogically at each level. For example, if I use Power Correction to reduce the power by 50%, do I still have the full resolution (1024?) of control at the Drive level or is this now half the resolution left?
The administrator has disabled public write access.
Time to create page: 0.075 seconds