Figure 5-3: Jumper Settings For Port A Configurations - evertz 8084 Instruction Manual

Models 8084/8084AD/8085 Closed Caption Encoder Manual
Newer units shipped with firmware "R000724" or later support RS-422
communications as well. Units with RS-422 support have an "IO PLD"
revision number of "02" or higher. Otherwise, a factory hardware upgrade is
required to support RS-422 voltage levels. To check for RS-422 support,
follow the procedure given in section 5.5.3 "Viewing Firmware and PLD
Revision Levels".
To reconfigure port A, it is necessary to unplug the caption encoder and
remove the top cover. Figure 5-3 shows the settings of jumper block J9 on
the main circuit board for the various configurations available. The pinouts
corresponding to RS-232 DTE (factory setting) and RS-422 tributary
configurations are given in Chapter 2.
To find out whether port A has been reconfigured for RS-422 logic levels,
refer to section 5.5.3 "Viewing Firmware and PLD Revision Levels". It is
impossible to tell whether the serial port pinout has been altered without
opening the unit for inspection, however. This may complicate attempts to
upgrade the firmware later. The instructions for downloading new firmware
to the caption encoder assume that the serial port A configuration has not
been altered from the factory settings.

Figure 5-3: Jumper Settings for Port A Configurations

TECHNICAL DESCRIPTION Page 5-7
Revision 1.6.6