Technical Information
Feb. 2002
Data Acquisition Units
C8907, C8908
The C8907 and C8908 convert the current output (analog
signal) from a PMT module into a counted value (photon
counting type) or digital value (charge amp type) by using
the built in signal processing circuits, and send this signal
to a PC. The measurement conditions and photomultiplier
tube gain can also be controlled from the PC. Connections
to the PMT module are very simple since these data
acquisition units supply voltage (+12V) to drive the PMT
module
Left: PMT module (sold separately)
Right: C8907, C8909
Parameter
C8907
C8908
Unit
Configuration
PC circuit + Counter
Charge amp + ADC
-
Pulse pair resolution
20
-
ns
ADC resolution
-
12
bits
Interface RC-232C
Integration time
10 to 1000(10 steps)
0.04 to 500
ms
Dead time
-
0.01 to 500
ms
Sequence of readings
-
1 to 127
-
Power supply voltage
+5
V
PMT
module
DAQ unit
Signal Output
Supply Voltage
(+12V)
RS-232C
+5V
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