JP3106907B2 - Function Generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION The present invention relates to a frequency,
Regarding a function generator having a plurality of channels in which parameters such as amplitude and duty ratio can be set,
More specifically, the present invention relates to a function generator capable of simultaneously setting parameter settings of a plurality of channels.

[0001]

2. Description of the Related Art A function generator is several μHz.
Is a signal source capable of selecting and generating a plurality of waveforms such as a sine wave, a square wave, and a triangular wave at a frequency from an extremely low frequency to about several tens of MHz.

[0002]

However, in the conventional function generator having a plurality of channels, for example, even if a certain parameter has the same set value, it must be set for each channel, which is troublesome. there were. The present invention has been made to solve the above problems, and has as its object to realize a function generator that can simultaneously set numerical values of a plurality of channels when certain parameters of the plurality of channels have the same setting value. I do.

[0003]

In order to achieve the above object, the present invention provides a function generator having a plurality of channels and capable of setting parameters such as frequency, amplitude, and duty ratio for each channel. It is characterized by comprising parameter setting means for setting each parameter for each channel, and parameter simultaneous setting means for simultaneously setting each parameter of each channel for each parameter.

[0004]

The parameter setting means sets each parameter for each channel. The parameter simultaneous setting means simultaneously sets each parameter of each channel.

[0005]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing functional blocks according to one embodiment of the present invention. In the figure, reference numeral 13 denotes parameter setting means, and parameters (frequency, phase, amplitude,
Offset, duty, sweep time).
111 to 116 are parameter simultaneous setting means;
Reference numeral 126 denotes a memory for storing that the simultaneous setting unit has been selected.

Numeral 14 denotes a numerical value setting register, 141a stores a value set to channel 1, 141b stores a value set to channel 2, and 141c stores a value set to both channels. Reference numerals 142 to 146 store the above-described parameters for each channel. Reference numeral 15 denotes a waveform control means for controlling a waveform output based on the set value stored in the numerical value setting register, and 16 denotes a waveform output means for outputting a waveform based on the output of the waveform control means 15.

FIG. 2 is a diagram showing a specific example of the configuration of the front surface of the panel. In the figure, reference numeral 21 denotes a display unit made of a liquid crystal or the like;
Reference numeral 7 denotes a channel switching key, and when this key is pressed, the display screens of channel 1 and channel 2 are alternately switched. Numeral 22 denotes a numerical value display unit, and the numerical value of the numerical value display unit is set using the keys of the rotary encoder 25 or the numeric keypad unit 26. 231 is a frequency selection button, 232 is a phase selection button, 233 is an amplitude selection button, 234 is an offset selection button, 235 is a duty selection button,
Reference numeral 36 denotes a sweep time selection button. By pressing these buttons, the rotary encoder 25 or numeric keypad 26
Set the value to be set from. In FIG. 2, the frequency can be set.

241 is a frequency simultaneous setting button, 242 is a phase simultaneous setting button, 243 is an amplitude simultaneous setting button,
44 is a simultaneous offset setting button, 245 is a simultaneous duty setting button, and 246 is a simultaneous sweep time setting button. When the simultaneous setting of these buttons is released (not pressed), all the memories 121 to 126 in FIG. 1 are OFF as shown in FIG.

Next, the operation of the function generator having the above configuration will be described with reference to FIGS. FIG. 2 shows CH1 by the channel switching key.
And FIG. 4 shows a state in which CH2 is selected. (The screens of FIGS. 2 and 4 show the current setting values of each channel, and the memory 12
1 to 126 and the value setting register (see FIG. 1) are in the state shown in FIGS. 5 and 6).

That is, FREQ corresponding to memories 1 and 3
(Frequency) and AMPL (amplitude) simultaneous setting buttons are inverted, and these values (1.0 kHz, 2.0 Vpp)
H1 and CH2 are common, and other parameters such as P
HASE is 0 deg for CH1 and 90 deg for CH2
Have different setting values. FIG. 7 (a),
(B) shows the CH set as described above before changing the numerical value.
1 shows output waveforms of CH1 and CH2.

FIG. 8 shows the internal state of the numerical value setting register in which the above set values are changed. In this case, the simultaneous setting buttons of FREQ (frequency) and AMPL (amplitude) corresponding to memories 1 and 3 are selected. , These values (0.5 kHz
z, 1.0 Vpp), CH1 and CH2 are common, and other parameters such as PHASE are 0 de for CH1.
g, CH2 90deg, OFFSET 0.5V,
The setting values are different from each other, such as 1.0 V. FIGS. 9A and 9B show the set CHs after changing the numerical values.
1 shows output waveforms of CH1 and CH2. In this way, only the frequency and the amplitude are linked and set simultaneously at CH1 and CH2.

FIG. 10 shows an access address when a numerical value is set in CH1. A frequency register of FREQ and an amplitude register of AMPL are registered in BOTH, and other numerical values are registered in different registers for CH1 and CH2. Therefore, by arbitrarily combining the simultaneous setting buttons 241 to 246, the settings between the channels can be partially set in common.

In this embodiment, the case where the number of channels is 2 has been described. However, simultaneous setting can be performed for two or more channels by adding registers corresponding to the channels. .

[0014]

As described above, according to the present invention,
Since the parameters that can be set simultaneously in any combination can be selected, when several parameters of multiple channels have the same setting value, it is possible to set the numerical values of multiple channels at the same time, improving operability. A function generator can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a function generator according to the present invention.

FIG. 2 shows CH1 of the function generator of the present invention.
FIG. 4 is a diagram illustrating a specific arrangement example of a front panel in a display state.

FIG. 3 is a diagram showing a state of a memory when a function generator of the present invention is not set simultaneously.

FIG. 4 shows CH2 of the function generator of the present invention.
FIG. 4 is a diagram illustrating a specific arrangement example of a front panel in a display state.

FIG. 5 is a diagram illustrating a state of a simultaneous setting memory when a frequency and an amplitude are simultaneously set.

FIG. 6 is a diagram illustrating a setting state of a numerical value setting register before a numerical value is set.

FIG. 7 is a diagram showing an output waveform before setting a numerical value.

FIG. 8 is a diagram showing a setting state of a numerical value setting register after setting a numerical value.

FIG. 9 is a diagram showing an output waveform after setting a numerical value.

FIG. 10 is a diagram showing an access address when setting a numerical value in CH1.

[Explanation of symbols]

 13 Parameter Setting Means 14 Numerical Setting Register 15 Waveform Output Control Means 16 Waveform Output Means 21 Display 22 Numerical Display 25 Rotary Encoder 26 Numeric Keypad 27 Channel Switching Key 231 Frequency Selection Button 232 Phase Selection Button 233 Amplitude Selection Button 234 Offset Selection Button 235 Duty selection button 236 Sweep time selection button 241 Frequency simultaneous setting button 242 Phase simultaneous setting button 243 Amplitude simultaneous setting button 244 Offset simultaneous setting button 245 Duty simultaneous setting button 246 Sweep time simultaneous setting button

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G06F 1/02 G06F 3/00 G06F 3/14 G09G 5/00 G01R 31/3183 H03B 28/00

Claims (1)

(57) [Claims] 1. A function generator having a plurality of channels and capable of setting parameters such as frequency, amplitude, and duty ratio for each channel, parameter setting means for setting each of the parameters for each channel, A function generator comprising parameter simultaneous setting means for simultaneously setting each parameter for each parameter. [0000]