Glenayre Electronics Inc. GL-T8600-CN Manual Do Utilizador
DSP Exciter
Glenayre Document Number: 9110.00172
OPTIONS
Issue 1, Rev. I: 01/15/97
Page: 10-8
Copyright © 1997 Glenayre
Print Date: 02/19/97
Note
Not all transmitters can do all the modes.
10.3 Exciter/PA Control with I20 Interface
The following major paragraphs describe the operation of the major items within the I20
interface. Detailed figures are referenced, as required.
interface. Detailed figures are referenced, as required.
The controller interface is the portion of exciter circuitry that connects the transmitter
controller to the exciter. The controller interface dictates what kind of transmitter controller
may operate the transmitter. The transmitter can be operated through one of several control-
lers depending on the interface circuitry installed at the exciter. The remainder of section
10.3 describes I20 controller interface circuitry.
controller to the exciter. The controller interface dictates what kind of transmitter controller
may operate the transmitter. The transmitter can be operated through one of several control-
lers depending on the interface circuitry installed at the exciter. The remainder of section
10.3 describes I20 controller interface circuitry.
Two boards form this interface, the internal I20 interface board and the external I20
interface I/O board.
interface I/O board.
Control commands from the transmitter controller are connected through the interface
circuit. This circuit supplies remote control to the microcontroller unit (MCU) control
circuit. The VT-100 VDT supplies local control. The MCU control circuit generates all
control signals for the other circuits, and monitors their status. The MCU control circuit
reports status back to the VT-100 VDT and the interface circuit, which supplies the status
to the transmitter controller.
circuit. This circuit supplies remote control to the microcontroller unit (MCU) control
circuit. The VT-100 VDT supplies local control. The MCU control circuit generates all
control signals for the other circuits, and monitors their status. The MCU control circuit
reports status back to the VT-100 VDT and the interface circuit, which supplies the status
to the transmitter controller.
10.3.1 Reference Source
The ten-MHz reference signal is provided by the controller via J8 on the exciter/control
board.
board.
10.3.2 Controller Interface Connector Functions
Refer to
and
for a pin-by-pin description of signal functions. The
exciter interfaces with the transmitter through connector J2 and the controller through J1.
Table 10-7 Remote Select Input vs. Mode (standard)
mode sel 1 J1-25
mode sel 2 J2-1
selected mode
command ground (LO)
ground (LO)
analog
command open (HI)
ground (LO)
2-level
command open (HI)
command open (HI)
4-level