USB3-FRM13_K Users Manual (Rev 1.1)
-
38
- http://www.daqsystem.com
(7)
“Use Ext, Ref, Clock” toggle
If the button clicks, you can use an external reference clock.
(8)
“Configure Trigger” button
Trigger # 1 (CC1), Trigger # 2 (CC2) of the following conditions, is set depending on the
selected trigger Delay, Width, Blank. The default setting frequency is based on 50MHz (1
clock period: 20ns). When Ext Out Trig is selected, the frequency of the external Reference
(REV+/-) signal is used as the default frequency. Trigger Delay, Width, Blank values are
different, and CC4 output is changed to this signal.
Delay : 0 ~ 4095, Width & Blank : 0 ~ 65535
Minimum frequency can be set f=1/T , so 1 / ((4095 + 65535 + 65535) * 20ns ) = 369.8Hz.
Reference)
If the default settings is Delay / Width / Blank of 0/0/0 100ns (20 +80), so the
output is 10Mhz as shown in the figure below.
