# :CMODe Subsystem

:CMODe Commands

- :CMODe Subsystem
- :CMODe General Commands
- :CMODe CRECovery Commands
- :CMODe EYE Commands
- :CMODe Threshold Commands
- :CMODe Scaling and Units Commands
- :CMODe SNDR Setup Commands

The `:CMODe` subsystem commands control common-mode waveforms.

## Waveform Identification

In the `:CMODe` command syntax, common-mode waveforms are identified by the associated instrument connection number (from 1 to 8). For example, the following command sets the color of the common-mode waveform of an instrument installed at connection 1.

    :CMODe1_1:COLor TCOLor8

Traditional instruments take up two connections, either connections 1 and 2 or connections 3 and 4. For these type of instruments, the common-mode waveform is identified using the number for the left-most occupied connection. For example, `:CMODe1_1` or `:CMODe3_1`, respectively. Single-connection instruments could have two channels. In this case, the common-mode waveform of an instrument installed at connection 4 would be identified as `:CMODe4`. Also, when Infiniium 2026 is configured with a simulated connections, one-connection simulated instruments are available that have two channels. The following table shows several examples of common-mode waveform identification.

Examples of Common-Mode Waveform Numbers
Instrument Type | Installed Connections | Source Channels for Differential Waveform | Differential Channel Waveform Identification
--- | --- | --- | ---
Traditional Two-Connection, Dual Channel (for example, 86112A) | 1 & 2 | 1_1 and 2_1 | `:CMODe2_1`
3 & 4 | 3_1 and 4_1 | `:CMODe3_1`
Simulated or Future Single-Connection, Dual Channel | 1 | 1_1 and 1_2 | `:CMODe1_1`
2 | 2_1 and 2_2 | `:CMODe2_1`
3 | 3_1 and 3_2 | `:CMODe3_1`
4 | 4_1 and 4_2 | `:CMODe4_1`

## Example Command Sequence

    :CMODe1_1:DISPlay ON
    :CMODe1_1:COLor TCOLor 7