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5-14 5708009-C
Advanced Energy
®
For units that have the pulsing option, pulsing output can be enabled or disabled. All
pulsing settings are made only through the AE Bus Host port. If you are using Virtual
Front Panel, see the Virtual Front Panel User Manual for an explanation of making
these settings. If you are not using Virtual Front Panel, see “Host Port—RS-232 With
AE Bus” on page 4-37 for information about communicating through the Host port
and for the commands that control pulsing.
Understanding Pulsing
When pulsing is enabled, the Apex generates pulses of RF output based on frequency
and duty-cycle settings.
• The frequency defines the length of pulsing cycles, that is, the amount of time
between each RF-on event. Valid frequencies are between 150 Hz and 50,000 Hz.
• The duty cycle sets the percentage of each pulsing cycle for which output is on.
Values can be set from 10 to 90 percent. For example, if you set the duty cycle
percentage to 15 percent, then during each pulsing cycle, output will be on 15
percent of the time and off 85 percent of the time.
Note: Pulsing settings can not be changed when RF output is on. You must turn output
off before changing any pulsing settings.
Enabling and Setting Pulsing
To enable pulsing, send a valid set of frequency and duty cycle settings to the Apex
generator (see Host port commands 93 and 96 in Table 4-6. on page 4-45). Sending an
invalid combination of settings disables pulsing. Host port commands 193 and 196
read back these pulsing settings.
Pulsing settings are not saved when the Apex unit is turned off. To return pulsing
settings to default, cycle power to the Apex unit.
This section of the manual provides information for the:
Pulsing option
PIN position 14, (A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17) option 1.
(When identifying the PIN position, remember that the A at the beginning of
the PIN is not counted as a position. The PIN option is the number or letter
you should look for in the specified position.)
For more information about the PIN and for a complete list of how PIN
positions correspond to Apex product options, see Table 1-1. on page 1-4.