PeakTech 4120 Bedienungsanleitung Seite 27

6.2.3. Wave Forms
The basic ramp signal has been generated by the OP Amp. Based on this basic signal, the squarewave has been
formed by the line receiver IC. And, the sinewave has been formed by the quardruple TR IC.
The output wave forms and phase relationship are as follows.
Note: Under activation of the 600 Ω impedance mode (20, Fig. 1), the output wave forms can be normal up to 100
kHz range.
6.2.4. Frequency ranges
®
The PeakTech 4120 can supply the frequency in the 7 ranges, as shown on the following table
Frequency Range assigned to each select switch
Select Switch
X10
X100
X 1 k
X 10 k
X 100 k
X 1 M
X 10 M
Note:
The output frequency can be read by multiflying figures optioned by the frequency control dial (16, Abb. 1), and the
frequency Range select switch (19, Abb. 1).
Ex. 1 kHz = 1,0 (at the dial 16) x 1 K (at the S/W 19)
6.2.5. Features
Voltage Controlled Frequency
Output frequency can be varied with an external input from the VCF input Terminal (13, Fig. 1).
For 0 ~ 10 V DC VCF input voltage, the frequency is changed by 1:2, depending upon activation of the frequency
range select switch (19, Fig. 1). To operate the VCF function, turn the frequency control knob (16, Fig. 1), fully CCW,
and connect the external voltage to the VCF input terminal.
Amplitude Control
The maximum amplitude of output voltage is more than 20 V under the open load, but it is reduced by half (50 %)
under the 50 Ω load or 600 Ω load. The amplitude output voltage can be varied continuously with operating the
Amplitude control knob (12, Fig. 1), in the range of -20 dB. If the Amplitude Control Knob is pulled out, the output
signal is set to the -20 dB fixed.
Assigned Range
1 Hz – 10 Hz
10 Hz – 100 Hz
100 Hz – 1 kHz
1 kHz – 10 kHz
10 kHz – 100 kHz
100 kHz – 1 MHz
1 MHz – 10 MHz
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Maximum Output
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
10 MHz