Easy-MCS
™
Multichannel Scaler and MCS-32 (A73-B32) Software
931054C / 1213
18
Fig. 7. Input Control Dialog.
!
Note that several things happened after you clicked on Start:
(a) The Start button was highlighted for an instant, indicating that acquisition was
taking place. Since the dwell time was 1
μ
s and the pass length was 1000, the
acquisition lasted 1
μ
s × 1000, or only 0.001 second.
(b) The Pass Count changed from 0 to 1 on the sidebar.
(c) No data were collected because there was no input. (You may have acquired a few
counts if anything is connected to your instrument’s DISC or SCA inputs.)
!
If you want to see it happen again, click the Clear button. Note that the Pass value
changes from 1 to 0. Click Start again.
2)
The next step: Select Input Control... from the Acquire Menu
Click the Acquire menu and select
Input Control.... This will open the
dialog shown in Fig. 7.
3)
Choose which input to use
The Easy-MCS has two different inputs:
a fast discriminator and a single-channel
analyzer (SCA). In general, the fast dis-
criminator is used to count pulses with
fast edges (<100 ns), while the SCA is
used to count slow-positive pulses (pulse
widths from 0.5
μ
s to 100
μ
s). For this
tutorial, connect the Channel Advance
output to the discriminator input so the
discriminator will be used.
4)
Connect the CHANNEL ADVANCE
Output to the DISC input
With a 50-
Ω
coaxial cable, connect the BNC labeled Channel Advance Output to the BNC
on the MCS-PCI-OPT2 Fan-Out Cable that you installed on the Easy-MCS. Note that there
is also a Channel Advance Input, so be careful to connect to the correct BNC. If you do not
have a fan-out cable, you will need to make a wired connection between the appropriate
two pins on the 25-pin D connector illustrated in Fig. 60 (page 92).
Содержание Easy-MCS
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