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7700 MultiFrame Manual
7700PTX-MVP Unidirectional UMD Protocol Translator
The 7700PTX-MVP's fourth serial port is not RS-422 capable.
4.6.
CONNECTING TO UP/DOWN TIMER
Third party UDTs often offer two serial communications options: an RS-232 output or an RS-422
output. The default communications settings are 9600 baud, eight data bits, one stop bit, no parity.
Unless otherwise specified when ordering, RS-232 is the default output. Sometimes the rear cover of
the UDT must be removed to determine which output option is installed.
The UDT should be configured so that it outputs serial data in hh:mm:ss format (NOT hh:mm:ss.ff).
4.6.1. Accessing Serial Communications
To access the serial communications options, press the SHIFT-7 key combination. The UDT lower
display indicates which option is currently selected. The display will read — —:— —:00 for continuous
second output (HH:MM:SS), and — —:— —.30 for continuous frame output (HH:MM:SS.FF).
Alternately, '25' may be displayed instead of '30' when using EBU timecode.
NOTE: While accessing the serial communications options, the UDT will
automatically pause both channels and suspend all other timing operations.
4.6.2. Changing the Output Options
To change the output options, press the <+> (plus) key to step through the selections. Press the
START/STOP key to accept a particular output option. This section may be exited at any time by again
pressing the <Shift> and <7> key combination or Clear All.
4.6.3. RS-232 Wiring
The following table displays the RS-232 wiring information:
4.6.4. RS-422 Wiring
The following table displays the RS-422 wiring information:
7700PTX-MVP - 12
UDT Pin
Description
24
Tx
25 – 32
Gnd
Table 4-5: RS-232 Wiring
UDT Pin
Description
5
Tx-
23
Tx+
25 – 32
Gnd
Table 4-6: RS-422 Wiring
Revision 1.9
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