GW Instek GFG-8200A Series User Manual

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FUNCTION GENERATOR-SERIES

INSTRUCTION MANUAL

(a) Connect the lines as Figure 7.

(b) According to the operation guide in this manual, set Square wave or

Pulse wave output.

(d) To test CMOS circuit by pulling up the switch of TTL/CMOS, and

adjust CMOS level by rotating the switch to set the proper level

(e) Use dual-trace scope to show the input-output timing relation

judged by the two waves shown in Figure 4.

(F)Testing of speaking and impedance network

This equipment can be used to test the frequency characteristics of

speaker or any impedance network. It also can get the resonant

frequency of network.

(a) Connect the device under test as in Figure 8, can use oscilloscope in

stead of voltmeter.

(b) When use voltmeter, adjust the frequency of instrument record

down voltage relative to frequency.

freq., this must be the resonant freq. of this speaker, see Figure 10.

Whether installation may cause any effect to this frequency or not?

The proper design of case-installation will cause two small ramps

on both sides of this sharp ramp.

(d) In testing other impedance network, the resonant may not occur in

low frequency. But in approaching the resonant frequency, there

are still increasing in voltage, then the impedance can be tested as

following:

FUNCTION GENERATOR-SERIES

INSTRUCTION MANUAL

(1) Series connect a R1 to the network under test as in Figure 9.

(2) Get voltage read out in E1, E2, adjust R1 until E2 is equal to one

half of E1.

(3) Under this frequency, the impedance network is the same as the

R1.

(G)Act as automatic test of speaker

Because there provide the auto feature in this equipment, the output can

drive to amplifier for testing the frequency response of speaker.

(a) Set Auto/Manual to Auto position.

(b) Set function to Sine wave

(d) Sweep mode (LIN, LOG), sweep width, sweep time can be set in

any value.

(e) The line connected is showed in Figure 11.