White’s Electronics Spectra VX3 - Manual (Page 22)

Page 2-4
Spectra VX 3 User’s Guide
Electromagnetic Interference (EMI)
EMI can be a problem with any wide-band metal detector,
whether a multi-frequency VLF or a pulse induction design.
VX
3 includes a frequency offset to help deal with this. Select the
Transmit Frequency item on the Live Control Bar to access the
Offset control:
There are 5 increments of frequency offset; with the search
coil held in the air, find the one for best stability.
Menus & Controls
VX 3 has a number of configuration settings with 2 ways to
access them:
• Live Control Bar — Live-search settings
• Menus — All settings, suspends operation
When the MENU button is pressed during normal search the
Main Menu appears. We will cover all the menu settings in sub-
sequent chapters.
Tip: If VX 3 seems to have an erratic audio only when
sweeping the search coil on the ground, check the
ground balance.
Tip: EMI is easiest to hear in pinpoint mode (trigger
pulled).
Tip: If VX 3 continues to have erratic audio with the
search coil held in the air, reduce the RX Gain.