Independent Channel Operation
For all stimulation types except IFT4, two independent channels are
available that may be set to the same or different waveforms. The required
waveform for each channel is chosen by first selecting Channel A or B at the
bottom left of the Setup screen and then touching the ‘Waveform‘ button to
select a new waveform from the stimulation type list which appears. The
‘Copy setup’ button can be used to quickly transfer any edited settings from
Ch.A to Ch.B (or Ch.B to Ch.A). When ‘Copy setup’ is pressed, an interim
screen will first appear to Confirm or Cancel the copy process (to prevent
accidental over-writing).
Treatment for the selected channel can be initiated from the Setup screen
by turning up the encoder – this might be useful for ‘auditioning’ the treatment
settings to check that they are comfortable for the patient, for instance.
Alternatively, a treatment proper could be initiated by first turning up the
output of Channel A and then selecting the ‘B’ button at the bottom to move
to Channel B, which can then be turned up (the buttons on the bottom row
of the display are still active when a treatment is running but all other
parameter buttons will be locked out and will have no effect when touched).
Output Screen
For the status of both channels to be viewed when running simultaneously it
is best to move to the Output screen which is achieved by touching the
‘Output’ button at the bottom right of the display. It is possible to move from
the Setup screens to the Output screen while a treatment is running by
touching the Output button at the bottom right of the display, but going back
from the Output screen to a Setup screen is disallowed (greyed-out) unless
the output is first reduced to zero using the encoder (there would be little
point in returning to a Setup screen unless editing of a parameter was
required, and this can only be done if the treatment is halted anyway).
In the Output screen only the output levels of each (or both) channels can be
controlled while the treatment is running. The ‘A’ and ‘B’ buttons at the bottom
left of the display select which channel(s) the rotary control acts on - these
latch on and off (highlighted yellow when active) and can be selected
individually or both together (which gives simultaneous control of the output
of both channels).
The buttons marked CC and CV (constant current or constant voltage) in this
screen also give control over selection of either of these modes for each
channel independently but are only active when the treatment is halted.
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