UNISource Corporation FG-8102, Руководство по эксплуатации

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H. Adjust the 50
Ω
output to the desired amplitude with the AMPLITUDE control.
FIG. 3 OUTPUT WAVEFORMS AND PHASE RELATIONSHIPS
I. A positive or negative DC component can be added to the signal at the 50
Ω
BNC by use of the DC OFFSET control, as required by the circuit into which
the signal is being injected.
J. A fixed amplitude TTL square wave is available at the TTL OUT BNC on the
front panel. This signal is unaffected by the AMPLITUDE, ATTENUATOR or
DC OFFSET. TTL output is a square wave for use in digital circuits, even
though FUNCTION SWITCH is on sine or triangle wave.
2) Considerations
CAUTION
KNOWLEDGE OF THE FOLLOWING FACTORS IS ESSENTIAL FOR PROPER
OPERATION OF THE INSTRUMENT:
A. The DC offset control can provide over ± 10 volts open-circuited, or ± 5 volts
into 50
Ω
load. Remember that the combined signal swing plus DC offset is
also limited to ± 10 V open-circuited, or ± 5 V into 50
Ω
. Clipping occurs slightly
next page these levels. FIG 4. illustrates the various operating conditions
encountered when using DC offset. If the desired output signal is large or if a
large DC offset is used, an oscilloscope should be used to make sure that the
TTL Pulse 0V
Triangle 0V
Sine 0V
Square 0V