3156B User Manual
Racal Instrument © 2005
WaveCAD 4-31
Note
Normal color of the digital reading is dark blue. If you
modify the reading, the color changes to a lighter shade of
blue, indicating that the 3156B has not been updated yet
with the new parameter. Pressing Execute will update the
instrument and will restore the color of the digital readout
to dark blue, indicating that the displayed value is the
same as the generator setting.
Also note that the digital readout has an autodetect
mechanism for the high and low limits. You cannot exceed
the limits if you are using the dial but only if you use the
keypad. In case you do, the program will not let you
download an illegal parameter and you’ll be requested to
correct your setting.
The Freerun Pattern Data Table, as shown in Figure 4-14 defines the
patterns at the digital output connector. The Index column defines
pattern steps along with their associated Stim List and Hold Count.
The Stim List defines 12-bit pattern values in hex and the Hold Count
defines sample clock dividers for the indexed step.
Figure 4-14 The Digital Pattern Data Table - Freerun