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 deions, 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.

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.

    

      

GFG-809110低频信号发生器