Channel Tab
Channels enable you to work with other photographers and to keep your triggering exclusive. Some channels operate on different frequencies to help you avoid interference. All PocketWizard radio slaves set to the same channel work together.
ControlTL™ uses a new channel system in addition to the Standard channel system used in other PocketWizard radios. The MiniTT1™ Transmitter and FlexTT5™ Transceiver can trigger all existing PocketWizard radios. They can also be taught channels (including new ControlTL channels) by existing PocketWizard transmitters. The FlexTT5 can operate as a receiver for any PocketWizard transmitter.
ControlTL Transmit Priority at X-Sync (Nikon Only)
Uncheck this box to have the MiniTT1 or FlexTT5 prioritize sending triggers on Standard PocketWizard Channels rather than ControlTL Channels. If you're using a PocketWizard that receives on Standard Channels as remote, like a Plus II or MultiMAX, unchecking this box max slightly increase the maximim sync speed.
Use ControlTL for Rx Channel Check Box (FlexTT5 Only)
Check this box to have the FlexTT5 radio listen on a ControlTL channel (set below with ControlTL Rx Channel). Uncheck this box to listen on a Standard channel (set below with Standard Rx Channel). E-TTL II commands will not be received. Receiving radios can only listen on one channel at a time; either ControlTL or Standard. If your transmitter is a MiniTT1 radio and you are triggering a remote radio that is expected to respond to E-TTL II commands, then you must use a ControlTL channel. If your transmitter is a Plus II or MultiMAX radio, then use a Standard channel.
IMPORTANT: When a MiniTT1 or FlexTT5 is used as a transmitter, it always sends out 2 triggers, one ControlTL trigger on a ControlTL channel, and one Standard trigger on its channel. This enables you to use an E-TTL II system with other manual flashes. The ControlTL system synchronizes both triggers precisely.
Note: When the MiniTT1 is plugged in it only shows the Transmit drop downs - ControlTL Tx and Standard Tx - because it is a Transmitter. The FlexTT5, a Transceiver, will show both Rx and Tx because it can both Transmit and Receive.