MCA166-USB
Setup Information
FILE CONTENT
EXPLANATION
$ADC:
ADC resolution
4096
Channels
0
LLD (lower level discriminator channel)
3967
ULD (upper level discriminator channel)
$PRESETS:
MCA Presets
Integral
Live Time, Real Time,
Integral (sum of all counts within a ROI)
Area (sum of all net counts within a ROI)
10000
Value
1
ROI number
266 332
ROI begin and end (optional line, depend on the application)
$PZC_VALUE:
PZC Settings
1232
DAC adjustment value for PZC (0..2499 mV)
15
Pre-defined time parameter for PZC adjustment
15
Pre-defined time parameter for PZC adjustment
$FAST_DISCR:
Fast discriminator level
400
Factory setting for auto threshold
$SLOW_DISCR:
Slow discriminator level
400
Factory setting for auto threshold
$THR:
Threshold value (%)
2
% of ADC channels; 2-60 % possible
$GAIN_VALUE:
Amplifier gain
200
Coarse gain (2...1000)
1.0261
Fine gain (0.5000...1.5000)
$DTC:
Shaping Time
1
1, 2
µ
s
3
4.0
Actual shaping time
4
$INPUT:
ADC input source and polarity
Amplifier
Amplifier (internal main amplifier),
Direct (+3V, -3V), direct input with full range amplitude of 3V
Neg
pos or neg (amplifier input polarity)
$PUR:
State of the Pile Up Rejector (PUR)
On
”on” or ”off”
$STAB:
Stabilization
On
”on” or ”off”
230
ROI limits of the stabilization peak
370
300
Stabilization target channel
$STAB_PARAM
Stabilization parameter
10
Stabilization time
25000
Stabilization error
$POWER:
Preamplifier power supply
+12= on
”on” or ”off”
-12= on
”on” or ”off”
+24=off
”on” or ”off”
-24=off
”on” or ”off”
$HV:
High voltage polarity and value
+500V
Value
Unused
HV Inhibit Mode
3 1 and 2 µs are the shaping time of a standard MMCA. By use a modified MMCA: 1 = low shaping time, 2 = high shaping time
4 The actual shaping time (only written by newer applications)
26
