You can define up to four clean feed signals within the RM2200D. These signals are always assigned to input signals. All clean feed signals are available in the Audio Sources window both as stereo and mono signals. You configure all these options in the section Various of the configuration dialog in the RM2200D software. (see also Various - Configuring Level Meters and Clean Feeds)
Additionally, you can select alternative back-signals instead of the “mix-minus” signals which are commonly sent to clean feed outputs. This is for instance useful when you want to send another signal instead of the program output to a telephone unit or outside line.
If you want to change the gain of the clean feed output or assign an alternative signal to it, do the following:
Press the Select key in the fader channel associated to a clean feed.
Press the key CF out on the Master Control Module. If a clean feed is assigned to this channel, the display shows CFOutGain <Value>. If no clean feed is defined for this channel, it shows not available.
Adjust the gain value for the clean feed output signal between +15 dB and -30 dB. Use the Control Knob to do so, the display shows the current value.
Press the key CF out again. You can now use the Control Knob to select an alternative output signal for the clean feed. The display shows your current choice.
![[Important]](../pics/important.gif)
Important You can only select input signals as alternative output for clean feeds, if you have enabled them for this function. To do so, open the RM2200D software in Configuration Mode. Select the tab Frame I/O and find the desired input signal. Check the checkbox Add to selector pool. (see also Frame I/O - Configuring the DSP Frame)
Press the Select key again to finish configuration.
Here is an example for a typical clean feed application: If you want to connect a telephone hybrid to the RM2200D, do the following:
Connect the output of the telephone unit to an input of the RM2200D. Connect the input of the unit to an output of the RM2200D.
Start the RM2200D software, connect to the DSP frame and enter the Configuration Mode. (see also Using the RM2200D Software in Display Mode)
Select the tab Frame I/O and assign labels for the input and output of the telephone unit. (see also Frame I/O - Configuring the DSP Frame)
Select the tab Various and define clean feed signals for the input signal from the telephone unit. (see also Various - Configuring Level Meters and Clean Feeds)
Go back to the section Frame I/O and select the output socket which is connected to the input of the telephone unit. For the output routing, use the clean feed signal just created as audio source.
Now, the telephone unit should receive the proper clean feed signal from the RM2200D. If you want to send an alternative back signal to it, make sure you have activated the option Allow selector when defining the clean feed.