Setting The Serial Port Access Permission; Special Functions Of Port B (8084 And 8084Ad) - evertz 8084 Instruction Manual

>PORT A MAP
A:CF1234 TF1234X
>PORT B FUNCTION
Funct B Normal
Funct B Echo PA
Funct B Echo PC
Funct B Echo PD
Funct B CC xmit
Funct B CC recv
In Port Echo mode the user is responsible for configuring identical baud rates and
data words on the serial ports of the transmitting and receiving units.
OPERATION
Models 8084/8084AD/8085 Closed Caption Encoder Manual
3.3.2

Setting the Serial Port Access Permission

PORT A MAP is used to permit port A to control the various data streams
(similar menu items are available to configure permissions for
ports B, C, D and optional modem port E). See section 4.7 for a
discussion of port permissions.
The two digits to the right of the 'CF' indicates whether port A
can control the caption streams in the respective field. The two
digits to the right of the 'TF' indicates whether port A can control
the test streams in the respective field.
indicates whether port A can control extended data services
('X'). A dash character in place of the numeral indicates that
field is not permitted for port A. For example if CF1---TF----X
is displayed, port A can only control the caption streams from
field 1 (CC1 and CC2) and the Extended Data Services but not
the caption streams from field 2 (CC3 and CC4) or any of the
text streams.
Use the
press the SELECT key to toggle the enabled or disabled state.
3.3.3

Special Functions of Port B (8084 and 8084AD)

PORT B FUNCTION is used to select special alternate functions available
only to serial port B.
When Funct B Normal is selected, serial port B uses the same
interface as all of the other serial ports on the unit for interfacing
with computers running captioning software.
Select Funct B Echo PA to cause command data entered via
port A to be echoed back out of port B. The Funct B Echo PC
and Funct B Echo PD settings provide similar functions to echo
the commands from ports C and D respectively. These modes
allow two or more caption encoders to be connected in a daisy-
chain fashion. The successive unit(s) will then receive the same
serial commands as the first unit, after a slight propagation
delay. The receiving unit does not need to be placed in a
special operating mode, and may be another 8084, 8074, an
8075 or an 8070 unit. Figure 3-8 shows a typical application for
port echo mode.
Revision 1.6.6
or keys until the desired field is blinking, then
The rightmost digit
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