Lectrosonics T4 - Manual (Page 8)

IFBT4
LECTROSONICS, INC. 8
Frequency Window Behavior, based on
TUNING mode selections
If NORMAL tuning mode is selected, the Up and Down
buttons select the operating frequency in single chan-
nel (100 kHz) increments and the MENU+Up and
MENU+Down shortcuts tune in 16 channel (1.6 MHz)
increments.
There are two classes of group tuning: factory preset
groups (Grp A through D) and user programmable fre-
quency groups (Grp U and V).
In any of the group modes, a lower case a, b, c, d, u or
v will be displayed to the immediate left of the transmit-
ter switch settings in the Frequency window. The letter
identifies the selected factory or user tuning group. Any
time the currently tuned frequency is not in the current
group, this group identification letter will blink. Any time
the currently tuned frequency is in the current tun-
ing group, the group tuning mode indicator will give a
steady (non-blinking) indication.
In any of the group modes, the Up and Down buttons
navigate among the selected intermod-free frequen-
cies in the group. In factory groups (A through D), the
MENU+Up and MENU+Down shortcuts jump to the first
and last frequencies in the group. In user groups (U
and V), MENU+Up and MENU+Down permit access to
frequencies not already in the group.
User Programmable Frequency Group Behavior
The user programmable frequency groups “U” or “V”
work very similarly to the factory groups with a few
exceptions. The most obvious difference is the ability to
add or remove frequencies from the group. Less obvious
is the behavior of a user programmable frequency group
with only one entry, or with no entries.
A user programmable frequency group with only one en-
try continues to display the single frequency stored in the
group no matter how many times the Up or Down buttons
are pressed (provided the MENU button is not pressed at
the same time). The “U” or “V” will not blink.
A user programmable frequency group with no entries
reverts to non-group-mode behavior, i.e., access is al-
lowed to all 256 available frequencies in the selected
receiver module’s frequency block. When there are no
entries, the “U” or “V” will of course blink. However, once
a frequency has been added to the tuning group, this
behavior changes to group-mode behavior where the
MENU button must be pressed and held while either the
Up or Down buttons are pressed to access frequencies
that are not part of the current tuning group.
Adding/Deleting User Programmable
Frequency Group Entries
Note: Each User Programmable Frequency Group
(“u” or “v”) has separate contents. We recommend
that you consider the larger issue of frequency
coordination prior to adding frequencies in order to
minimize potential intermodulation problems.
1. Start from the Frequency window and verify that a
lower case “u” or “v” is present next to the transmit-
ter switch settings.
2. While pressing and holding the MENU button press
either the Up or Down button to move to one of the
256 available frequencies in the block. Whenever
the selection comes to rest on a frequency that is in
the current group, the group tuning mode indicator
(letter “u” or “v”) will give a steady indication. On
frequencies that are not in the group, the indicator
will blink.
3. To add or remove the displayed frequency from the
group, hold down the MENU button while pressing
and holding the Up button. The group tuning mode
indicator will stop blinking to show that the frequen-
cy has been added to the group, or begin blinking to
indicate that the frequency has been removed from
the group.