ScienTECH AB65, Руководство по эксплуатации

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AB65
Scientech Technologies Pvt. Ltd. 10
Procedure :
•
To study phase shift oscillator without buffer between RC sections proceed as
follows :
1. Connect +12V, -12V DC power supplies at their indicated position from
external source or
ST2612 Analog Lab .
2. Connect a 2mm patch cord between test point B & C, D & E, F & A
3. Switch ‘On’ the Power Supply.
4. Measure frequency at any test points T1, T2, T3, T4 using CRO.
5. Compare measured frequency with the theoretically calculated value.
6. Measure phase difference between test points Tl & T2, T2 & T3, T3 & T4, and
T4 & T1 with the help of dual channel CRO.
7. Vary gain Potentiometer of 470K to adjust gain of the amplifier in case of
clipped waveform.
Results :
1. Theoretical value of output frequency =
____________
2. Practical value of output frequency =
____________
3.
Phase shift between Test Point T1 & T2 =
____________
4. Phase shift between Test Point T2 & T3 =
____________
5. Phase shift between Test Point T3 & T4 =
____________
6. Phase shift between Test Point T4 & T1 =
____________
•
To study phase shift oscillator with buffer between RC sections proceed as
follows :
1.
Connect +12V, -12V DC power supplies at their indicated position from
external source or
ST2612 Analog Lab .
2. Connect a 2 mm patch cord between Test Point B & G, C & H, D & I, E & J, F
& K, L & A.
3. Switch ‘On’ the Power Supply.
4. Measure frequency at any test points T1, T2, T3, T4 using CRO.
5. Compare measured frequency with the theoretically calculated value.
7. Measure phase difference between test points T1 & T2, T2 & T3,
T3 & T4, T4 and T1 with the help of dual channel CRO.
8. Vary gain Potentiometer of 470K to adjust gain of the amplifier in case of
clipped waveform.