Clear-Com PTX-3 - Manual (Page 19)

Vitec Group Communications
PTX-3 UHF Digital Hybrid IFB Transmitter 1 - 1 3
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 entry 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 allowed 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 transmitter 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
frequency has been added to the group, or begin blinking to indicate
that the frequency has been removed from the group.
INSTALLATION AND OPERATION
1. The PTX-3 transmitter is shipped with pin 1 of the XLR input
connector tied directly to ground. If a floating input is desired, a
Ground Lift Jumper is provided. This jumper is located inside the
unit on the PC board near the rear panel XLR jack. For floating