Setting The Vf Balance - Loma IQ3X Operating Instructions Manual

Operating Instructions

4.11 Setting the VF Balance

Setting the balance on the raw I and Q channels for all available operating frequencies to
maximise sensitivity of the detector is carried out in the Balance Setup menu. This is completed
during the machine manufacturing process so should not need adjustment under normal
operating conditions.
However, if any of the electronics are replaced it is recommended that the setup is repeated.
This is normally done using the AutoBalance feature which automatically makes any I and Q
channel balance adjustments necessary for each of the available frequencies.
Manual adjustment is also possible and this is carried out by Loma Service Engineers when
required.
To set up the VF Balance, proceed as follows:
1. Select Menus > Service > Configuration > Balance Setup to display the Balance Setup menu
options which are listed and described below.
2. Use the Navigation Keys
to enable the value to be edited.
3. Use the Navigation Keys
OK / Enter Key to confirm the selection.
4. Repeat step 2 and 3 until you have selected and confirmed values for each option.
The Balance Setup menu contains the following options:
Frequency
The IQ3X has seventy (70) different operating frequencies ranging from 31kHz up to 937kHz. Each
of the available frequencies can be selected by scrolling through the list.
Note that the frequency selected in this menu is independent of the frequency for
the currently running product.
When a frequency is selected from the list, the current setting for the receiver I and Q channel
potentiometer positions together with the balance can be viewed.
When the menu is exited, the detector will restore the current running products' operating
frequency.
Pot position
The potentiometer positions for the I and Q channels of the selected operating frequency are
displayed. The potentiometers are used to select the signal size that is injected into each
channel to balance them out.
These values are automatically set for the selected frequency by the software when the
AutoBalance feature is used.
The potentiometer positions can be manually adjusted within this menu, but this is not
recommended.
Copyright © Loma Systems
to select each option in turn press the OK / Enter Key
to select the required option value and then press the
52
Original Document