Lectrosonics T4 User Manual download pdf (Page 8)

IFBT4

LECTROSONICS, INC.

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.

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