Videotec DCTEL - Manual (Page 33)

Page 9 MNVCDCBD01_0442
It is possible, using a level converter, to connect different matrixes from those listed above: in particular, a
DCFIT converter can be used to control switchers SW42REM, SW82REM and the matrix SW164OSM.
If the video line has the MACRO protocol setting (essential, by the way, for transmitting
telemetry via coaxial cable), an error in the video line setting (whether baud rate or wiring) will lead to a
communication error with the matrix, which will be shown as a blinking LED for the corresponding
active monitor. While this error status persists, commands will never be carried out on the video line.
Check the settings and make sure to be working with the same protocol and baud rate as the matrix.
6.3.1 OSM Matrix Programming
The DCTEL / DCBD control keyboards can be used to program matrixes that are enabled for the OSM function
(SM42A, SM82A, SM84A, SM164A, LXRPS42A/LXRPS42TA, LXRPS82A/ LXRPS82TA, LXRPS84A,
LXRPS164A)
Make sure LED 1- 8 is on for the complete duration of the matrix programming phase because the on
screen menus require numeric controls between 1 and 8. Commands between 9 and 16 will therefore be
ignored (LED 9-16 on).
Matrixes SM42A, SM82A, SM84A, SM164A:
To enter programming mode, press the SHIFT and ENTER keys simultaneously. Then follow the on screen
instructions for the various configuration steps, pressing the appropriate keys.
Matrixes LXRPS42A / LXRPS82A and LXRPS84A / LXRPS164A:
• position on monitor 1 (LED Mon 1 on)
• press the SHIFT and ENTER keys simultaneously:
• after entering the programming menu, use the keys as follows:
8: to shift down
3: to shift up
6: to shift to the right
7: to shift to the left
Enter: to confirm
Seq: to return to the previous menu / exit menu
6.3.2 Telemetry via coaxial cable (DCTEL keyboard only)
The DCTEL keyboard can be used to transmit telemetry via coaxial cable using matrixes of the type SM42A,
SM82A, SM84A and SM164A. Make the setting for a MACRO type video line both for the DCTEL keyboard and
the matrix. Try to use a sufficiently high baud rate (we advise a baud rate setting of 38400). Also make sure
that, on completing set-up, the connection between matrix and keyboard is fully functional (if there are
communication problems between matrix and keyboard, the LED for active monitor status on the keyboard will
start blinking until effective communication with the matrix is re-established).
6.4 Connecting the DCTEL keyboard with telemetry receivers
The following paragraph concerns the DCTEL keyboard. If using a DCBD type keyboard (which does
not integrate the Telemetry functions), jump directly to the next section.
The RJ11 connector for telemetry can be used to connect the DCTEL keyboard to a range of telemetry
receivers (see page 3 for a list of receivers that are suitable for connection). The connection is made by RS485
type data transmission using a bipolar cable, which can be used for data transmission over a maximum
distance of 1200m. A maximum of 4 DCTEL keyboards can be connected in a single telemetry line (in this case
each keyboard should have a different address) to control a maximum of 16 receivers arranged in cascade.
NB: if only the telemetry line is used (no matrix) and if the video line has the MACRO Protocol
setting, the LED for the active monitor will start blinking (this status indicates a communication error
with the matrix). The blinking can be removed by setting the (unused) video line with a different type of
MACRO protocol, for example SW164OSM type (see the section on programming the video line).