User Manual

* Amplitude controller is a digital-analogue converter. Based on the amplitude value preset by user, it
generates a corresponding analogue voltage and then multiplied by the output signal so to guarantee the
amplitude of output signal to be the preset value. Offset controller is a digit-analog converter. Based on the
offset value preset by user, it generates a corresponding analog voltage and then added with the output
signal so to guarantee the offset of output signal to be the preset value.
3.3. Working principle of operation control
* MCU controls keyboard and display parts by interface circuit. When the key is pressed, MCU identifies the
code of pressed key and then executes the corresponding commands. Display circuit displays the working
state and parameters of the generator using menu characters.
* The knob on the panel can be used to change the number in the position of cursor. A trigger pulse will be
generated for each rotating of 15°. MCU can judge whether the rotation is left or right. If it is left, the
number in the position of cursor will be subtracted by 1; if it is right, the number in the position of cursor will
be added by 1 with continuous carry or borrow.
4. Handling instruction
4.1. General operation rule
4.1.1. Data input:
* If an item is selected, the parameter value can be entered by ten numeric keys writing from left to right. If
there are more than one decimal point entered in a parameter, only the first one is valid. For the function of
“Offset”, minus can be entered. To make the data come into effect, unit key must be entered after data
input. For wrong data input, there are two ways to modify. If the output end permits wrong output signal,
press any unit key to end and then re-enter data. If the output end does not permit wrong output signal, re-
select the same item and enter correct data, and then press unit key to end it.
* The input of data can use any assorted decimal point and unit, but the generator will display it in fixed
format. For example, the data 1.5 kHz or 1500 Hz entered will be effective displayed as 1.500.00 kHz.
4.1.2. Knob adjusting:
* In practice, signal needs to be adjusted sequentially sometimes, so number adjusting knob will be used.
There is a blink position of cursor in the numeric display. Press the key of 【＜】 or 【＞】 to move the
blink cursor leftwards or rightwards. Rotate the knob on the panel can adjust the number sequentially with
increasing 1 by turning it clockwise or decreasing 1 by turning it anticlockwise, even carry or barrow from
high-order digit. By the knob, data come into effect after entering and do not need enter unit key. When the
blink cursor moves leftwards, the data can be adjusted crudely and when it moves rightwards, the data can
be adjusted finely.
4.1.3. Selecting of input way:
* For known data, it is the most convenient to use numeric keys as it can be gotten easily without the
generating of transient data no matter how big the change of the data is, which is so important. For the
modifying of the entered data or for entering sequence data, it will be more convenient to use the knob. But
for a series of equidistant data, using step key will be much more convenient. So user should select neatly
according to the different applications.
4.2. Single frequency function
* After power on, the generator enters single frequency function automatically and output single frequency
signal.
4.2.1. Setting of frequency:
* Press the key of 【Freq】 to display the current frequency value. The frequency value can be entered
either by the numeric keys or by the knob. The signal of the frequency will be output at the end of
“Output“.
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