Setting The Vf Drive - Loma IQ3X Operating Instructions Manual

Operating Instructions

4.12 Setting the VF Drive

The transmitter drive for all available operating frequencies is set up in the Drive Settings menu to
maximise performance of the detector. This is carried out during the 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 Drive, proceed as follows:
1. Select Menus > Service > Configuration > Drive Settings to display the Drive Settings 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 Drive Settings 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 from the drop down list.
Note that the frequency selected in this menu is independent of the frequency for
the currently running product.
Drive On
The drive on time for the selected operating frequency of the transmitter is shown here. It can be
manually adjusted within this menu, though this is not recommended.
Drive Off
The drive off time for the selected operating frequency of the transmitter is shown here. This
value is read-only and cannot be changed.
Drive
The drive current for the selected operating frequency is displayed as a read only value. This
value is controlled by the drive on time setting. When the detector has been configured
correctly, the value will generally be close to the Configure current value set.
Larger aperture detectors operating at above 600kHz are likely to show a lower value. If in doubt
contact your local Loma service centre for assistance.
Copyright © Loma Systems
to select each option in turn press the OK / Enter Key
to select the required option value and then press the
54
Original Document