Communications Protocol; Figure 4-1: Communications Protocol State Diagram - evertz 8010TM IRIG Instruction Manual

4.2.

COMMUNICATIONS PROTOCOL

The Controller shall be denoted as the normal sender of a command (usually a computer). The Device
shall be denoted as the normal sender of a Response (the 8010TM-IRIG).
All command values, arguments and data values shown in this document are
expressed in hexadecimal format unless otherwise noted.
R (UNDEFINED)
The communications protocol is described in Figure 4-1. The Evertz unit (Device) immediately enters
the select state upon power-up and remains there unless directed by an Enter Broadcast Cmd (02 hex)
to the broadcast communications state. The diagram shows the various states of the device. The
designation R( ) indicates the data received from the controller, while the designation T( ) indicates the
data transmitted by the Device.
SERIAL PROTOCOL
Model 8010TM-IRIG SDI Time Code Master with IRIG Reader Manual
R(Enter Broadcast)
R (BREAK)
SELECT
R(STX)
T(NAK)

Figure 4-1: Communications Protocol State Diagram

T(ACK)
T(ACK)
no response required
T(ACK)
T (MESSAGE)
R (MESSAGE)
TIMEOUT
(10 msec)
Revision 1.4.1
Broadcast
R(Enter Select)
T(STX)
ERROR (Parity,checksum
undefined command, etc)
Page 4-3