TEXIO FGX-2220, Инструкция по эксплуатации

Страница: 82 / 229

69
5.
Press F1~F5 to select the
Start/Stop frequency units.
uHz
F1
~
MHz
F5
Range Sweep Range
1μHz~25MHz (Sine wave)
1μHz~1MHz (Ramp wave)
1μHz~15MHz (Square wave)
Start - Default 100Hz
Stop - Default 1kHz
Note To sweep from low to high frequencies, set the start
frequency less than the stop frequency.
To sweep from high to low frequencies, set the start
frequency greater than the stop frequency.
When marker is off, the SYNC signal is a square wave
with a duty cycle of 50%. At the start of the sweep, the
SYNC signal is at a TTL low level that rises to a TTL high
level at the frequency midpoint. The frequency of the
SYNC signal is equal to the sweep time.
When marker is on, at the start of the sweep, the SYNC
signal is at a TTL high level that drops to a TTL low level
at the marker. The SYNC signal is output from the mark
output terminal.
4-6-3. Center Frequency and Span
A center frequency and span can be set to determine the upper and lower sweep
limits (start/stop).
Panel Operation 1.
Press the SWEEP key.
Sweep
2.
Press F5 (More).
More F5
3.
Press F2 (Span) or F3 (Center) to
select the span or center.
Span
F2
~
Center
F3
4.
The Span or Center parameters will become
highlighted in the waveform display area.