XR12 Transmitter Pre-installation Manual
Control and monitoring
Page 6-4
Issue 0.17 2005-08-31
Inputs
The following is a description of the remote inputs to the system. These inputs are only accepted by
the system if the remote/local status is set to remote, unless otherwise noted. That setting can only be
made by a local user.
Inputs are toggled between states by an active pulse unless otherwise noted.
•
TB2-5 and 6, PDM inhibit: Continuous active signal inhibits the PDM by causing a shutback.
This also works when the remote/local status is set to local.
The associated 3-pin header/2-socket shunt post on the remote interface board is E15.
•
TB1-1 and 2, Ext. Interlock: A short circuit between the pins for normal operating status, an
open between these pins causes a shutback. This also works when the remote/local status is
set to local.
•
TB1-3(+) and TB1-4(-): RF PWR OFF terminals. Same as pressing the RF Off button on
the front panel. Provide an active pulse to activate.
The associated 3-pin header/2-socket shunt post on the remote interface board is E13.
•
TB1-5(+) and TB1-6(-): RF PWR ON terminals. Same as pressing the RF On button on the
front panel. Tells the system to provide RF power if possible. Provide an active pulse to acti-
vate.
The associated 3-pin header/2-socket shunt post on the remote interface board is E11.
•
TB1-7 and 8, Reset: Causes a system reset. Provide an active pulse to activate.
The associated 3-pin header/2-socket shunt post on the remote interface board is E10.
•
J3-22 and 23, IBOC Input Select A: Sets IBOC/Analog for Exciter A. Continuous active sig-
nal selects IBOC input, otherwise analog input is selected.
The associated 3-pin header/2-socket shunt post on the remote interface board is E9.
•
J3-24 and 25, IBOC Input Select B: Sets IBOC/Analog for Exciter B. Continuous active sig-
nal selects IBOC input, otherwise analog input is selected.
The associated 3-pin header/2-socket shunt post on the remote interface board is E17.
Note: The external PDM inhibit input is intended to be used in conjunction with antenna switching
circuitry, to ensure minimal RF output current is flowing during opening/closing of contacts in the
transmitter's RF feed cable. An active 'PDM inhibit' condition must be applied – disconnecting the
RF load – prior to contact opening. The active condition must be maintained until contact closure
has occurred, and an appropriate impedance has been connected to the transmitter's RF output. The
RF output will instantly be restored to its original level when the active condition is removed.
Summary of Contents for XR12
Page 6: ...XR12 Transmitter Pre installation Manual Page iv Issue 0 17 2005 08 31 ...
Page 14: ...XR12 Transmitter Pre installation Manual Description Page 1 4 Issue 0 17 2005 08 31 ...
Page 54: ...XR12 Transmitter Pre installation Manual Parts and tools Page 9 4 Issue 0 17 2005 08 31 ...
Page 68: ...XR12 Transmitter Pre installation Manual List of terms Page 12 2 Issue 0 17 2005 08 31 ...
Page 74: ...XR12 Transmitter Index Page 13 6 Issue 0 17 2005 08 31 ...
Page 75: ......