Arbitrary Waveform Generator - Produktinfo.conrad.com

More documents

Recommendations

Info

WGxx Arbitrary Waveform Generator Front Panel Operation 14 Clock Source Remark: All waveform modes (with the exception of triangular mode operation) are retriggerable, i.e., a new cycle can also be started if the full cycle has not yet been finished. In case of triangular mode operation a trigger signal appearing within the cycle is latched internally and becomes active immediately after cycle completion. This menu appears only in case of arbitrary waveform mode and specifies the source of the sample clock, i.e., the signal which transfers the data points from the wave shape memory to the D/A-converter of the instrument. C l o c k S o u r c e ( i n t ) s i n g l e e x t Fig.18: Clock source menu – channel 1 (?) For operating mode ‘int’ the internal NCO (numerically controlled oscillator) acts as clock source (see Fig.19). In case of mode ‘single’ clock pulses can be provided by pressing button 2 or using the rotary knob. For remote operation of the instrument by a PC additionally a software timer can be used as clock source. If the clock source mode of the instrument is changed to ‘single’ the output of the data points starts at the actual address of the wave shape memory. Consequently, the output of the data points in normal (‘int’) mode can be paused by switching into 'single' mode and continued if ‘int’ mode is selected again. A long-press on button 2 ('single') resets the address counter of the wave shape memory. Afterwards the output of the wave shape starts at the curve cycle. If mode ‘ext’ is selected, the TTL ? signal fed into the FREQ IN input acts as sample clock source of the instrument. FreqIn Taste oder Drehrad AM/FM NCO 1Hz...75MHz ext int single Clock Source Clk Trigger AM/FM Fig.19: Schematic diagram of sample clock sources Generator OUT Sync OUT 50Ω Sync OUT
WGxx Arbitrary Waveform Generator Front Panel Operation Special Functions This menu allows the selection of one of the two special functions ‘Freq Count' (frequency measurement of an external signal) or ‘SweepMode' by pressing button 1 or 3 . F r e q S w e e p C o u n t M o d e Fig.20: Special function menu Measurement of External Frequency Sweep Mode The frequency of an external signal fed into the FREQ IN input of the instrument can be measured in the range [0.1Hz ...10MHz]. There, the amplitude of the input signal has to be within the interval [0.2Vpp ... 50Vpp]. f = 1 2 3 , 4 k H z . T = 8 , 1 0 3 u S Fig.21: Frequency measurement of external signal In addition, also the period of the actual measurement value is given. This function is only available for arbitrary waveform generation. The first line of the display indicates the sweep time (resolution 100ms). Within this time interval the individual frequency values are updated by a 20ms clock (i.e., for 0.1s sweep time five different discreet frequencies between start and stop frequency are generated). S w e e p : t = 5 , 3 s 1 0 k 0 2 0 k 0 l o g Fig.22: Sweep mode The left value displayed in the second LCD line gives the starting frequency, the value displayed in the center of the LCD gives the stop frequency of the sweep cycle. By pressing button 1 (or 2 , respectively) one of the three memory cells of the frequency memory can be selected to define the start frequency (or the stop frequency, respectively) of the sweep cycle. It should be noted that also a sweep cycle with decreasing frequency ramp can be realized if start frequency > stop frequency has been chosen. To change the three memory values for start and stop frequency it is required to overwrite the memory cells of the frequency adjustment (see section Frequency). With button 3 the sweep-type can be modified. Here the modes linear, logarithmic or exponential are available. 15
Page 1 and 2: Systems Arbitrary Waveform Generato
Page 3 and 4: WGxx Arbitrary Waveform Generator C
Page 5 and 6: WGxx Arbitrary Waveform Generator F
Page 13: WGxx Arbitrary Waveform Generator F
Page 23 and 24: WGxx Arbitrary Waveform Generator S
Page 25: WGxx Arbitrary Waveform Generator S

Arbitrary Waveform Generator - Produktinfo.conrad.com

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?