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DFG-1200
Digital Function Generator

The Digital Function Generators DFG-1200 provides the Mössbauer Driving System with the reference signal, which determines the waveform of the source motion. The signal is generated digitally. This results in a source motion, which is completely synchronous to the channel sweep of the multichannel analyser

SINE

TRIANGLE (CONSTANT ACCELERATION)

CONSTANT VELOCITY (with 5 - 10 - 20 - 40% slope)

F1, F2 (individual, optional waveforms)

REGION-OF-INTEREST (continously adjustable)


The REGION-OF-INTEREST wave form is shown in the figure below. Sinusoidal slopes result in a minimum of vibration disturbance of the source motion. The REGION-OF-INTEREST waveform can be varied continously from CONSTANT VELOCITY to CONSTANT ACCELERATION (TRIANGLE) mode.







SPECIFICATIONS
Inputs
ADO-INPUT
Pulse slope
 
or
 
Pulse width
 
> 100 ns
Ext. Freq.
External frequency control
 
0-10 Hz
 
Pulse Height
 
~ 5 V
Outputs
Analog Output
  
20 Vpp, (600 Ω)
CHA/START
Pulse Shape
 
or (switchable)
 
Pulse Height
 
~ 5 V
 
Pulse Length
 
1 μs
 
Impedance
 
50 Ω
CHA /Start
Pulse Shape:
  
 
Pulse Height
 
~5 V
 
Pulse Lenght
 
1 μs
 
Impedance
 
50 Ω
Count enable
5 V signal during the linear part of the analog output signal.
  
 
Impedance
 
50 Ω
Sign
5 V signal during the positive part of the analog Output signal.
  
 
Impedance
 
50 Ω
Indicators
 
Dual colour light indicator for MODE and REGION-OF-INTEREST ON/OFF
  
Controls
Channels
Front panel 6-step rotary switch for selecting the number of channels
 
128 - 256 - 512 - 1024 - 2048 - 4096
Mode
Front panel 8-step rotary switch to select the waveform of the analog output signal:
- SINE
- TRIANGLE
- CONSTANT VELOCITY (5 - 10 - 20 - ­40 % slope)
- F1, F2 (optional)
  
Frequency
Front panel 10-turn potentiometer to adjust the frequency within the range
1 ... 100 Hz
  
Region of Interest
Front panel 10-turn potentiometer to adjust the minimum value of the ROI between zero and the maximum velocity, front panel toggle switch for setting it to zero
  
Multichannel Scaling
Front panel toggle switch for switching the channel sweep on or off
  
Physical
 
Double width NIM module
  
Weight
1.0 kg
  
Power Requirements
 
+ 6 V 900 mA
+ 12 V 10 mA
± 24 V 50 mA
or (autom. switching)
+ 12 V 900 mA
± 24 V 50 mA
  
 
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