White’s Electronics Spectra VX3 - Manual (Page 35)

Page 3-7
Spectra VX 3 User’s Guide
+95, each with a selection box. A box that has an ‘×’ enables
that VDI response, an empty box disables that VDI.
Frequency
The only control we will cover in this chapter is Frequency
Offset . See Chapter 4 for discussion about frequency modes.
The Frequency Offset control provides slight offsets ( 5 steps)
to the transmit frequencies and is useful for minimizing EMI
from power mains and RF, and for minimizing interference
from other detectors. In general, adjust the offset up or down to
find the quietest setting.
The Live Control Bar makes finding the quietest offset easy.
With the loop held in the air, pull/hold the trigger to enable pin-
point mode. EMI interference will be heard as repetitive audio
noise, and the pinpoint bars will bounce around like this:
Tip: Setting the disc mask for 191 VDI’s can be tedious. If
you want to set a range of VDI’s to the same state select
the first VDI in the range, press
ENTER+
 to set the same
value to subsequent VDI’s.
Bonus Tip: This works in either direction.