EEG HD490 - Page 40

HD490 Smart Encoder
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All Rights Reserved.
GPO Pin Assignments
The GPOs use the lower 16-pin connector, which mates to a female
IDC-16 connector. The pin assignments are given in the table below:
GPI Switch Functions
Each GPI Switch is activated when closed (connected to ground), and
inactive when open (left floating). The default GPI function mappings
are defined as follows:
GPI-A: Force 608 Up-conversion
Activating this function causes upconverted 608 caption data from the
SD video input to be encoded onto the HD video outputs, even in the
presence of upstream captioning on the HD input. Locally input data
will still override the upstream 608 data, but all upstream VANC
caption data will be ignored.
GPI-B: Modem Lockout
Activating this function disables the dial-up modem for data input. The
modem will still answer calls, but users will not be able to enter caption
data. If a modem user is entering data, and then this switch is closed,
the modem user will be cut off from entering more data
GPI-C: Port 2 Lockout
Activating this function disables P2 for data input. Users connected to
P2 will not be able to enter any caption data, and if a user is inputting
data and then the switch is closed, the serial port user will be cut off
from entering more data.
Pins
Output
1,2
1
3,4
2
5,6
3
7,8
4
9,10
5
11,12
6
13,14
7
15,16
8