GFG-809110低频信号发生器

GFG-809110低频信号发生器

1.FEATURES

   Reliable circuitry insure high stability and accuracy

   Easy operation on vertical type panel assembling

   Frequency range from 10Hz to 1MHz selectable in 5 ranges are       calibrated with single-scale graduations.

   More than 5Vrms at no load and more than 2.8Vrms on 600Ω loading (sine wave). Output level can be adjusted by a 10dB-step, 6 range attenuator and a level adjuster.

   Sine wave and square waves is available.

   Synchronizing input terminal

2.Specifications

   Frequency range:

   X1 range:   10Hz-100Hz

   X10 range:  100Hz-1KHz

   X100range:  1KHz-10KHz

   X1K range:  10KHZ-100KHz

   X10K range:  100KHz-1MHz

   Sine wave characteristics

   Output volGFG-809110: 5V rms or more

   Output distortion: 400Hz-20KHz, 0.1% or less

                   (X100 range for 1KHz)

                  50Hz-500KHz 0.5% or less

   Output Flatness: ±1.5 dB (refer to 1KHz)

   Square wave characteristics:

   Output volGFG-809110: 10Vp.p or more

   Rise time: 0.25 us or less

   Duty  ratio: 50%±5%  (refer to 1KHz)

   External synchronization characteristics

   Range±3% of oscillator frequency

   Input impedance: 10K approximate

   Maxi mun input: 10V rms

   Output characteristics:

   Impedance: 600Ω±10%

   Attenuator: 0dB, -10dB, -20dB, -30dB, -40dB, and -50dB in 6 steps (accuracy +1 dB at 600Ω load)

   Power requirement:

   Input: AC 110V or 220V, 50/60Hz

   Consumption: 5 Watt

   Dimension:

   142(w)*233(D)*197(H) mm

   Weight:3.5Kg

   Accessories:

   Power cord           1pc

   Test clip              1pc

   Instruction manual       1pc

3.CIRCUIT DESCRIPTION

1) Summary

   When reading the following descriptions, refer to the block diagram(Fig.1) and the schematic diagram.

   The sine-wave signal generated by the oscillator is fed through the WAVE FROM selector switch set at the “ ” position to the OUTPUT control, to adjust on any desired volGFG-809110.

   If the WAVE FORM switch is in the “” position, square wave is fed to the OUTPUT control to adjust on any desired volGFG-809110.

   The adjusted signal volGFG-809110 is applied to the output circuit with its impedance converted, and then delivered through an output attenuator to the output terminal.

   The attenuator provides selectable attenuations of 0dB through -50dB in 10dB steps at 600Ω of output impedance.

2) Wien Bridge Oscillator Circuit

   The Wien bridge oscillator circuit with resistance elements may be switched over for 5 ranges by the FREQ. RANGE switch, and the variable capacitor controlled by the FREQUENCY dial.

   These elements provide means to vary the oscillating frequency continuously over 10 times its frequency on one range, so any desired frequency within the entire frequency range from 10Hz to 1MHz can be set.

   The buffer circuit for the oscillator circuit is composed of a 2 sGFG-809110 differential amplifier and an output sGFG-809110, employing an DC amplifier circuit.

   The output volGFG-809110 is fed back with positive polarity through the oscillator elements to form an oscillating circuit; while it is also fed back with negative polarity through the non-linear thermistor to stabilize the amplitude.低频信号发生器GFG-809110

3) Square wave shaping circuit

   The square wave shaping circuit is a Schmit-trigger circuit in which the sine wave signal from the oscillator circuit is shaped into a square wave. Schmit-trigger circuit and a buffer amplifier providing sufficient rising and falling characteristics

4) Output circuit

   The output circuit converts the impedance of oscillating signal from the OUTPUT control and feeds the signal to the output attenuator at a low impedance. SEPP-OCL circuit is employed to provide sufficient low output impedance characteristics over the range from DC to 1MHz

5) Output Attenuator

   The 6-positions output attenuator selects attenuations of 0dB to -50dB in 10dB steps. At the 0dB position with the OUTPUT control turned fully clockwise, the output volGFG-809110 (sine wave at no-load time) is more than 5Vrms.

   The output impedance is rated at around 600Ω and the attenuation accuracy is as high as ± 1.0dB at 600Ω load.

6) Power supply

   The power supply circuit is powered by AC 110V/220V and delivers DC ± 24V sufficiently stabilized by large capacity smoothing capacitors and a volGFG-809110 stabilizer.

4. PANEL CONTROLS AND THEIR FUNCTIONS

   The table below describes the functions of panel controls. Refer to panel diagram on page 4

   FRONT PANEL

   1. DIAL POINTER

   This pointer indicates frequencies on the dial scale

   2.DIAL SCALE

   This dial is calibrated with graduations of 10-100 to indicate oscillating frequencies

   3. FREQUENCY DIAL

   This dial adjusts oscillating frequencies. Frequencies can be read by multiplying the reading on the dial scale by magnification of FREQ. RANGE.

   4. ATTENUATOR

   6-position output attenuator selects attenuations of 0dB to -50dB in 10dB steps.

   5. SYNC

   External synchronizing signal input terminals for GND for connection of synchronizing signal to the instruments.

   6. OUTPUT

   Output terminal used for both sine wave and square wave

   7. FREQ. RANGE

   Oscillating frequency range selector switch which selects the ranges in 5 steps as follows:

   X1       10Hz-100Hz

   X10      100Hz-1KHz

   X100     1KHz-10KHz

   X1K     10KHz-100KHz

   X10K    100KHz-1MHz

   8. WAVE FORM

   Output waveform selector switch. When pressed to “’ output signal is sine wave. When pressed to “” the signal is square wave.

   9. AMPLITUDE

   Amplitude adjuster to continuously vary the amplitude of output volGFG-809110

   10. POWER  Switch turns on the power when pressed

   11.VOLGFG-809110 SELECTOR  110V/220V selection

   12. AC INPUT TERMINAL

   13. FUSE SOCKET

14. This lamp ( light emitting diode) lights when POWER switch (10) is ON.

5. OPERATING INSTRUCIONS

  1) Start-up

    First check that the fuse (13), then connect the supplied AC  power cord to your AC outlet. Press the power switch (10) and the pilot lamp (14) will light indicating that the unit is ready for operation. Allow 3 minutes for the unit to warm up so that it is stabilized.

  2)Waveform selection

    Press the WAVE FORM switch (8) to “~” position to obtain sine waves. Press the switch to the “” position for square waves.

  3)Frequency selection

   First set the FREQ. RANGE switch (7) to the desired range, then set the frequency dial(3) so that the dial pointer(1) indicates your frequency.

Example: suppose you want to select a frequency of 1.5KHz, then proceed as follows:

1. Set FREQ. RANGE switch(7) to X 100.

2. by using the frequency dial, set the dial pointer(1) to “15” on the dial scale.

The frequency thus selected is:

15×00=1500(Hz)=1.5( KHz)

   4) Adjustment of output volGFG-809110

   The output volGFG-809110 from OUTPUT terminal (6) either sine wave or square wave, can be continuously varied by AMPLITUDE(9) and stepped down by ATTENUATOR (4)

Example: To adjust output volGFG-809110 to 10mV rms, proceed as follows:

1. Connect a voltmeter (e.g. TVT-321) capable of measuring AC  1V rms to OUTPUT terminal (6)

2. Set ATTENUATOR (4) to 0dB and then adjust AMPLITUDE (9) until the voltmeter indicates 1Vrms (6)

3. Set ATTENUATOR (4) to -40dB. The voltmeter indicates about OV, while a volGFG-809110 of 10mVrms appears at OUTPUT terminal (6)

 低频信号发生器GFG-809110

5) USE of Synchronizing input terminal (instrument is between 990Hz and 1010Hz)

   By applying an external sine wave signal to SYNC terminal (5), the oscillating frequency can be synchronized to the external signal. Synchronizing range is increased in proportion as the input volGFG-809110 is increased as shown in Fig.3, indicating that the synchronizing range is about 1% per input volGFG-809110 of 1V.

Example: Suppose that the input signal volGFG-809110 is 1Vrms and the oscillating frequency of GENERATOR is between 990Hz and 1010Hz(1KHz±1KHz×1%/v×1V=1KHz±1KHz×0.01), the frequency can be synchronized with 1KHz of the input signal.

   Note that too high synchronizing signal volGFG-809110 will affect the amplitude and distortion factor, and care must therefore be taken when the signal volGFG-809110 is higher than 3Vrms. Also, note that if the synchronizing signal is largely deviated the distortion factor. It is therefore advisable that the oscillating frequency be first synchronized with a low input signal volGFG-809110 (less than 1Vrms) and then the volGFG-809110 be increased.

6. APPLICATIONS

1) Using as sine wave oscillator

   As a sine wave oscillator, features can be noted as below.

1.1 Low distortion factor can be obtained for measurement of distortion characteristic of amplifier.

1.2 As the unit working on wide bandwidth, it can be used for measurement of frequency characteristic of amplifier.

1.3 The built-in high accuracy attenuator permits measurement of amplifier gain.

1.4 Can be used as a signal source of impedance bridge.

2)Measurement of amplifier gain

   An example of measurement of amplifier gain is described below

   First connect the instrument, amplifier to be tested and AC volt-meter as shown in Fig.4

2.1Adjust ATTENUATOR (4) and AMPLITUDE(9) so that AC voltmeter indicates the rated output (supposed to be 1 Vin this example) of the amplifier. To facilitate the measurement, it is advisable to set ATTENUATOR(4) as low as possible. Assume that ATTENUATOR (4) is set -50dB for the rated output.

2.2 Disconnect the amplifier and connect the AC voltmeter to instrument to measure the output volGFG-809110. Note that the use of ATTENUATOR (4) eliminates the need for connecting a high sensitivity voltmeter. If ATTENUATOR(4) is set to 0dB and the voltmeter indicates 2V, it means that the input volGFG-809110 of the amplifier is 50dB below 2V. Therefore, the gain obtained is as follows:

3) Measurements of phase characteristic

   Connect the instrument and an oscilloscope to the amplifier to be tested as shown in Fig5. If there is no phase shift about the output signal of the amplifier, the oscilloscope will display a straight line as shown in Fig. 5A. If the straight line on the oscilloscope is curved at its top and bottom sections as shown in Fig.5B, it indicates that the output signal of amplifier is suffering from an amplitude distortion. In this case, reduce the output level of instrument a little to vary the frequency. This causes the straight line on the oscilloscope to expand gradually to turn into an ellipse. By utilizing the configuration of this ellipse. The phase shift can be calculated as follows:

   First, measure the maximum horizontal deflection and suppose that this deflection is”X” and that the section at which the ellipse crosses the horizontal axis is “X, as show in Fig.6. And, the phase shift angle θ is given by the following

Find from the table of trigonometric functions and the value obtained gives the angle of phase shift.

4)  Using as square wave oscillator

    The instrument features excellent rising and falling characteristics (120ns as standard characteristic.) it has no coupling capacitors in the output sGFG-809110, so the sag (deflection of top section) is as low as 5% at 50Hz. By applying such a good square wave to an amplifier input, various characteristics of amplifier can be observed on an oscilloscope. To test an amplifier proceed as follows:

4.1 connect the instrument, an amplifier to be tested and an oscilloscope as shown in Fig7.

4.2 Press WAVE FORM (8) to the “” position to obtain square waves of appropriate frequency and amplitude.

4.3 During the test, change the frequency as necessary. The relationship between waveforms and amplifier characteristics is shown in Fig.8

GFG-809110低频信号发生器

公司已发展成为一家集研发、生产、销售、售后于一体的企业。公司以“高效服务，诚信创新”为经营理念，取得了用户的*认可。本着“质量是生命，服务是根基”的创业理念，博采众长，坚持以品质为先，以服务取胜！

公司销售网络遍布全国，为国内外企业用户提供Zui大化压缩商品物流环节，大大降低用户采购成本，力争成为业内工业品集成供应商。

公司以技术为先导，在得到广大用户认可的同时，业务能力也得到了发展，积累了丰富的行业经验力，经营规模不断扩大，不断成长为一家综合性的供应商。

公司团队口号：我们是细分领域专家！特别能吃苦！特别能学习！特别能战斗！

对用户的郑重承诺是：莫因事小而不为之，莫因事烦而不愿为之。

随着公司的不断成长、壮大，公司将继续以服务社会为己任，我们始终本着“质量是生命，服务是根基”的创业理念，坚持以品质为先，以服务取胜！

公司拥有专业的销售工程师和强大的技术支持，优质的售后服务队伍为用户提供快捷、周到的服务，消除您一切后顾之忧。我们深信，只有站在用户的立场，为用户提供更好服务。以支持用户的业务和发展，才能终获得双羸！

公司以其化的平台，打造高效能供应链体系，配套大型空港仓储物流中心，为用户提供强有力的供货保障。

“下道工序的要求是对上道工序的命令”，用户是我们终的下道工序，所以满足用户的需求 “有求必应” 是一切工作的出发点和核心。

“科技为本、*yi、用户至上、合作共赢”是公司一贯的宗旨。公司将严守承诺，积极进取，进一步加大研发投入，开发更好的产品与用户共享，并谒诚为广大用户提供jia的服务。

让我们一路同行，携手走向更加美好的明天！

SM-30磁化率仪在地理和地质方面用途广泛，*的灵敏度为10–7SI，小得可放在衬衫口袋里，重量轻，深受拥护喜爱。SM-30是SM-20的升级版，更新颖，更精确。

SM-30特别用在野外地质勘探和快速实验室分析，对岩石或岩心样品进行分析和分类。能测出顺磁性、反磁性、铁磁性岩石的细微差别并精确地给出磁化率。使用了传统的传感器和新的信号处理方法保证仪器处于lǐng先地位。

SM-30的六个测量模式在工作状态下可切换。两个是基本模式，两个是补偿模式，一个是扫描模式，一个是平均模式。

自动调整测量，非常简单的三键控制，单手可操作，一个用于测量，一个用于贮存，一个用于存档。其它操作可使用电脑来完成，如给出测点说明，贮存测量数据以便进一步处理。锂电池以及自动关机功能配合，可在不换电池的情况下长期工作。

技术参数：

灵敏度：10 – 7SIunit s

工作频率：8KHz

测量时间：每点不长于5秒

数字显示：4数位LCD

控制：3个控制键

测量范围：0.000至999×        1/1000SIunits，自动调整测量范围：

内存：250个测量数据，更大内存可依附于电脑

传感器：空心线圈+8KHz LC振子，直径50mm。在20mm范围内可获取90%的信号：

电池：2块3V锂电池CR2430（正常工作时间为80小时）

尺寸：100×65×25mm

操作温度：-20℃ 到 +50℃