Tektronix FG501, Инструкция по эксплуатации

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Operating Instructions—FG 501
The phase (start level) of the waveform burst can be
varied ±90° by pulling out and turning the PHASEcontrol
either counterclockwise or clockwise from the 0
(centered) position (see Fig. 1-6). The phase of the output
burst is referenced to
the sine or triangle waveform 0° start
point.
Output frequency can be varied during the burst
duration by applying a voltage-controlled frequency
(VCF) signal to the VCF INPUT connector.
Voltage-Controlled Frequency (VCF) Output
The output frequency of any selected waveform can be
swept
within a range of 1000:1 by applying a 0 to 10 V
signal to the VCF INPUT connector. The polarity of the
VCF input signal determines which direction the output
frequency sweeps from the frequency set by the
MULTIPLIER selector and FREQUENCY Hz dial; i.e., a +
signal sweeps the frequency upward as shown in Fig.
1-7(A),
a — signal sweeps the frequency downward as
shown in Fig. 1-7(B).
The maximum swept frequency range of 1000:1 encom­
passes the sensitive uncalibrated range of the FRE­
QUENCY Hz dial, i.e., <.1 to 1. Therefore, to ensure that
the frequency does sweep at least a range of 1000:1, it is
recommended that the FREQUENCY Hz dial be set at 10
and a Oto— 10 V signal be applied to the VCF IN connector.
The output will thus sweep downward at least 1000:1 from
a FREQUENCY Hz dial setting of 10 as shown in Fig.
1-7(B). It may be necessary to vary the CAL control to
obtain the full 1000:1 swept range or the lowest swept
frequency desired.
SWEPT FREQUENCY
RANGE
Fig. 1-7. Swept Frequency range with 10 V signals applied to VCF IN connector.
1-6
REV. B JUL 1978