TKR_Mask

  <tkrMask>
    <!-- only expect masked off channels -->
    <GTEM ID="0">
      <GTCC ID="0">
        <!-- Mask off unwanted functionality for this CC-->
        <mask_tcc_in/>Mask input to the TCC
        <mask_tcc_out/>Output from this TCC
        <GTRC ID="0">
          <!-- Mask off unwanted functionality for this RC-->
          <mask_tot/>Mask TOT signals from the RC
          <mask_trig/>Mask Trigger signal in RC
        </GTRC>
      </GTCC>
    </GTEM>
  </tkrMask>