| CPFT-V4.1 |
| Phase Shifter / Time Delayer |
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The CPFT4.1 is a PC card developed for shifting a trigger pulse especially in periodical but also in non periodical experiments. Input pulses can be delayed by any phase shift angle. The angle is precisely controlled by the hardware and remains constant, not depending upon the frequency. The frequency itself can be changed in a very wide range depending upon the phase shift resolution, from 0.005 Hz to over 1 MHz. |
| Periodical Experiments - Phase Shifting |
| When a periodical pulses appears on the trigger input, an output trigger is shifted by the given phase angle. The period between pulses is measured and in the next step the trigger pulse on the output appears. The process of measuring and generating pulses assembles in the digital circuit, and guarantees full precision in the very wide frequency range. Because there is a connection between an output resolution and a maximum input trigger frequency, the device can work in 8 ranges e.g. for the range of maximum input frequency 1.17 MHz the resolution is 22.5 degree, for the range of maximum output resolution 0.005 degree the maximum input frequency is 280 Hz. |
| Non-periodical Experiments - Time Delay |
| In this mode the output trigger pulse appears at the given time after the input trigger. The delay can be selected in the wide time range from 50 ns up to 140 s with resolution 50 ns. |
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Specifications |
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Two modes of operation: phase shift and time delay |
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Trigger input: TTL or analog |
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Programmable active trigger slope
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TTL output trigger |
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Phase Shift Ranges: |
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Phase Resolution
[deg] |
The period is divided by |
Maximum Trigger Frequency
[kHz] |
| 22,5 |
16 |
1171,9 |
| 5,62 |
64 |
293,0 |
| 1,4 |
256 |
73,2 |
| 0,35 |
1024 |
18,3 |
| 0,088 |
4096 |
4,6 |
| 0,022 |
16384 |
1,1 |
| 0,011 |
32768 |
0,6 |
| 0,005 |
65536 |
0,3 |
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Time Delay Range: |
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50 ns - 140 s |
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Resolution: 50 ns |
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Input to Output jitter: 12,5 ns
(10 ns) |
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Onboard generator: |
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Generator can be used independently
or connected to the trigger input |
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Frequency limit: 0.003 Hz - 1
MHz |
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Additional independent Input Trigger Frequency Meter |
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Select
from list: |
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Applications |
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| CPFT V4.1 can be used in a conventional or a digital video stroboscope. It offers visualization of fast rotating or oscillating objects in a slacken rate. The partial scanning of the phase shift range is also possible. |
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Software |
| The software controlling the CPFT4.1 works in three modes: Edit, Manual and Run. In Edit mode you can simply edit the time table. Pulses on the output are disabled. In Manual mode you can manually adjust the phase angle. The output is enabled. In Run mode the phase shifter will execute its programmed sequences. The current phase angle is displayed.
Control software for Windows 98/2000/XP. |
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