w w w . u q d e v i c e s . c o m
L o g i c 1 6 U s e r M a n u a l
| 10
SPECIFICATIONS
Note: Users can switch between configuration A and B with a firmware update
TIMING
Configuration A
Configuration B
Time bin, digital
156.25 ps
78.125 ps
Time jitter (RMS)
71.6 ps
58.5ps
Dead time
5 ns
†
5 ns
†
Time tag filter window
156.25 ps
78.125 ps
Max. input delay
0 to + 40 μs
††
(2
18
– 1 units)
0 to + 20 μs
††
(2
18
– 1 units)
Input delay adjustment step
156.25 ps
78.125 ps
Coincidence window
0.156 ns – 2.6 ms
(2
24
-1 units)
0.078ns – 1.3 ms
(2
24
-1 units)
SYSTEM PERFORMANCE
Time tag rate burst rate
200 Mtags/s for up to 1024 events/channel
Sustained data rate (time tagger mode)
~ 11 M tags/s (USB 2.0)
Time tag processing rate, time tag filter mode
†††
190 M events/s
Max. on-board coincidence count rate
100 MHz (summed across all channels)
Input channel settings (for coincidence pattern definition)
Tri-state: Active, Inactive, Ignore
Maximum number of simultaneously processed patterns
> 43 million (3
16
)
> 6 thousand (3
8
)
INPUTS
Number of inputs
16
8
Input definition
SMA, 50Ω termination, DC coupled
I/P discriminator
Threshold range -2 V to +2 V , steps of 15 mV
Min. pulse amplitude 50 mV typical
Edge Detection Rising or Falling
Min. pulse duration
(above threshold)
300 ps
Max I/P level
-2.5 V to + 5.0V
Counters
32-bit
GENERAL
Power
NIM standard from crate: + 12V @ 1.0 A & -12V @ 0.5 A
OR
DC power supply: 12V @ 1.5A
Interface
USB 2.0
OTHER I/O
External time base input *
BNC, 10 MHz sine, 1KΩ, AC-coupled 1VPP
Outputs
Output definition SMA, 50Ω termination
Output signal TTL pulse, >2.5 V high, 100ns duration
Type: Pattern-detection triggered – No. of outputs 3
1
Type: Pulse generator – No. of outputs 1
†
Double pulse time difference to guarantee capture of all consecutive pulses. Shorter double pulse time
differences will be capture probabilistically
††
The maximum detection rate without loss of data is 25 MHz (50 MHz) with a delay of 40 μs (20 μs) due
to the buffer of 1024 events / channel. Higher detection rates possible for shorter delays.
†††
In filtering mode Logic-16 can process up to 190 Mtag/s internally to allow time of flight
measurements with respect to fast laser pulses.
* Note: Use of external time base makes channel 16 (8) inactive.
