While doing this, observe the polarity of the load.Īll outputs are floating. G) Now connect the load to the output terminals "+" and "-" of the adjustable output. The output impedance of the generator output F/G OUT, is 50 Ohm or 600 Ohm depending on the setting of the 50 / 600 Ohm switch.į) Switch the display switch to "V" (voltage) and set the desired output voltage. One "unit load" is 40 ♚ for the HIGH and 1.6 mA for the LOW state. The TTL output can drive 20 "unit loads" when HIGH and 15 "unit loads" when LOW. it has no negative voltage values (negative logic excepted). It is asymmetrical because, in contrast to the sine or "pure" square waves, the signal does not cross zero, i.e. The TTL level is available at the TTL OUT socket (BNC).Ī TTL level is an "asymmetric square wave".
A logarithmic sweep signal is possible by pulling the SWEEP RATE control knob. To adjust the speed of the sweep signal, turn the SWEEP RATE control knob slowly to the left or right. To achieve maximum width, turn the frequency adjustment knob (with scale) to its left stop and the width control to its right stop. To operate the built-in frequency sweep, pull the SWEEP WIDTH control knob and use it to adjust the width of the sweep signals in the range 100 : 1.
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