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QED factory Default Setting
The factory default settings have been designed to put you in a ‘safe’ position
:
•
if you get into difficulty (e.g. either messed the
settings up or it’s very noisy for no reason), or
•
If you have on purpose set the QED up ‘on the edge’ using most of the settings available to
push the limits and you want to quickly get back to some sort of standard for all settings.
The manual has a quick start guide (for beginners) that starts from the factory default position and
suggests adjustment of only two settings:
•
THS-A up from default (30) until a threshold is heard, and
•
Adjusting gain up from default (1) as high as is possible given the prevailing ground conditions
and EMI.
You can successfully detect using factory pre-sets, but I would at least do as the quick start guide
suggests, with the addition of setting Mode appropriately and setting THS-B appropriately.
Not forgetting the all-important GB.
QED and powerlines
One of the QEDs big advantages over other detectors is its ability to operate directly under single
phase powerlines without interference.
The SMR (Synchronous Mains Rejection) default value of 107 has been designed to eliminate single
phase 50 hz main signals. SMR is menu option 9.
If you do get some EMI under single phase power lines, then adjust SMR to null out 50hz mains EMI
that is off frequency.
SMR can also be used to null out other sources of rhythmic EMI (e.g. microwave towers, 2-way radio
transmissions, etc). So if you know you are in an area where these are a problem, then try adjusting
SMR to see whether you can null the resulting EMI.
I have tested this myself (powerlines) on numerous occasions and I can tell you that this feature
really works.
This feature is unique to the QED and is a feature that Howard designed into the QED from the very
start of the design.
If you do adjust SMR, then don’t forget to reset it to the factory default setting (107) after
you have
finished detecting under/near the powerlines, otherwise you will find that your QED is noisy when
next you are out detecting.
Summary of Contents for PL3
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