6100B/6105A
Users Manual
4-22
Waveshape Parameters
The start of the dip/swell can be set to start after a delay (in seconds) or at a particular
phase angle. All other parameters can be set in seconds or cycles. See Figure 4-26 and
Table 4-1.
gdw20.bmp
Figure 4-26. Dip Waveshape Softkeys
Table 4-1. Dip Waveshape Softkey Function
Softkey Function
Start On Delay Start a fixed time period after an external trigger
Start on Phase Angle Start determined by phase angle.
Note: to ensure all phases start simultaneously, this is the phase angle
of the L1 phase irrespective of which phases dips are programmed on.
Start Delay or Angle Set selected value for delay or phase angle
Ramp In Ramp in period
Period Time at the Dip/swell ‘change to’ level
Ramp Out Ramp out period
Change To The value to dip to as a percentage of the starting level
End delay Minimum end period before a re-trigger can occur
Trigger Control
There are three trigger-input modes. See Figure 4-27.
gdw21.bmp
Figure 4-27. Dip Trigger Softkeys
1. Free Running
The dip/swell is triggered internally, and is controlled by the set parameters and
repeats indefinitely. In a multiphase system, the relative start of dips on each phase
may be unpredictable if dip event durations, including all delays, exceeds 1 cycle. In
other words, the relative phase of dips on L1, L2, and L3 may vary, as parameters
contributing to dip event durations are changed when free running trigger mode is
selected.
2. External Trigger (One Shot)
The dip/swell is triggered once by external trigger applied to the TRIGGER INPUT
connector on the 6100B rear panel. The trigger signal must be TTL compatible. The
low going transition causes a trigger starting the first number of Dips/Swells set in
the Dip/Swell repetitions control. A trigger can also be initiated with the Force Ext.
Trigger softkey.
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