Transmitter Internal Jumper Options; Serial I/O Parameters; Line Terminators; Exciter Low Battery Level - RF Technology Eclipse Series Operation And Maintenance Manual

2

TRANSMITTER INTERNAL JUMPER OPTIONS

2 Transmitter Options
There are NO internal jumpers in the T50.
There are many software selectable options. Some options are selected on a per channel
basis, and some are defined globally (i.e. the parameter is fixed irrespective of which
channel is selected). Below is a description of these global parameters
2.1

Serial I/O Parameters

There are two serial ports. There is the main serial port which is brought out to the front
panel connector. This is referred to as PORT0. There is another serial port which is for
factory use only. It is referred to as PORT1.
The baud rate, parity, and whether hardware flow control is enabled can be defined for
PORT0. PORT0 is set by default to 57.6Kbps, with No parity, and No Hardware Flow
Control.
2.2

LINE Terminators

There are two main audio inputs, plus a direct audio (TONE) input. The direct audio
input is a High Impedance Balanced DC input, but the two audio inputs are AC coupled
(> 10Hz) inputs which can be High Impedance(HiZ), or 600 ohm inputs. Each input
can be software selected to be HiZ, or 600 ohms.
2.3

Exciter Low Battery Level

This is factory set to 24.0V, and defines the level of the DC supply that will cause an
Exciter dc supply low alarm.
2.4

External PA Parameters

There are several user definable parameters associated with the external PA provided
with each exciter.
These are the PA low battery alarm level (default is 26V), the PA Set Forward Power
Level (defaults to 100W), the Forward Power Low Alarm Level (defaults to 90%), and
the Reverse Power Alarm Level (defaults to 25% - corresponding to a VSWR of 3:1).
2.5

LOOP Volts Select

Normally the transmitter will key up if dc current is sensed flowing in either direction
between Line1+ and Line1- (>=1mA). If this option is selected, then a 12Vdc supply is
RF Technology T50 Page 7