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8.120. PRESETL -- List All Commmands in a Preset
8.121.
PRESETP -- Set Which Preset Will Be Activated At Power-Up
8.122.
PRESETQ -- Execute a Preset Quietly
8.123.
PRESETW -- Save a Preset
8.124.
PRESETX -- Execute a Preset
8.125.
REFASGN -- Assign AEC Reference to Input Channel
8.126.
REFGAIN -- Set Reference Output Gain
8.127.
SGGAIN -- Set Gain of Signal Generator
8.128.
SGMUTE -- Mute Signal Generator
8.129.
SGTYPE -- Set Type of Signal Produced by Signal Generator
8.130.
SSDELAY -- Set Delay Between Screen Saver Screens
8.131.
SSEN -- Enable or Disable Screen Saver
8.132.
SSSTART -- Set Idle Time Required for Screen Saver to Start
8.133.
SSTEXT -- Set Text to be Displayed by Screen Saver
8.134.
SWRESET -- Perform Soft Reset of System
8.135.
SWVER -- Query Software Version
8.136.
VTXMODI -- Enable VTX Mode on Specified Inputs
8.137.
VTXMODO -- Enable VTX Mode on Specified Inputs
1. Introduction
This document describes the command protocol that is used to communicate with the Vortex EF2280 via its RS-
232 port.
2. RS-232 Hardware
The communication between the Vortex and a host controller is conducted via the RS-232 port on the back panel
of the Vortex. The Vortex's RS-232 port operates at the following settings:
Bit Rate (bps): 9600 (default), 19200, or 38400
Data Format: 8 data bits, no parity, 1 stop bit (8N1)
Flow Control: none (default) or hardware (RTS, CTS)
Note that although the flow control setting is user selectable to none or hardware, hardware flow control must be
used when updating the firmware of the Vortex. This means that while a 3-wire RS-232 cable (RX, TX, GND) is
acceptable for control of the Vortex, the minimum cable for updating firmware should contain 5 wires (RX, TX,
RTS, CTS, GND).
3. Programming Tips
3.1. Initialization
During power up of the Vortex device or initialization of the host program, electrical fluctuations on the RS-232
lines may cause the Vortex to receive spurious data. After initialization, the host program should send a few
carriage return characters (^M, ASCII 13) to the connected Vortex to flush out any spurious characters it may
have received. Failure to do this could result in the Vortex ignoring the first command received after initialization.
As part of the host program initialization, the host will want to synchronize the status of its controls with the
current status of the Vortex devices that are being controlled. The host could initialize its controls to default
5


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