TFG6800 Series Function/Arbitrary Waveform Generator Users’ Guide
Suin Instruments Co., Ltd
47
that no modulating wave needed for sweep, just output discrete points in interval continuously.
In Log mode, frequency step is not fixed but changes with log relationship. At high frequency, the
step is large and at low frequency step is less. For wide sweep range, the variation is relative
well-proportioned, so log sweep is applicable for wide sweep range.
3.14.4 Start Frequency and Stop Frequency:
Press the
〖
Start Freq
〗
or
〖
Stop Freq
〗
soft key.
Then use the knob or numeric keypad to enter the desired frequency.
To sweep up in frequency, set the start frequency less than the stop frequency.
To sweep down in frequency, set the start frequency be greater than the stop frequency.
3.14.5 Marker frequency:
Press
〖
Marker Freq
〗
soft key, then use the knob or numeric keypad to
enter the desired marker frequency. When sweeping cross the marker frequency point, the sync
output hop at the same time. The marker frequency must be set between the specified start
frequency and stop frequency.
3.14.6 Sweep Time:
Press
〖
Sweep Time
〗
soft key and use the knob or numeric keypad to enter
the desired sweep time. Sweep time represents the time required to sweep from the start frequency
to the stop frequency. The time interval to sweep from one frequency to next one is constant, so
more sweep time results in more sweep frequency points and finer sweep step, vice visa.
3.14.7 Hold Time:
Press
〖
Hold Time
〗
soft key and use the knob or numeric keypad to enter the
desired hold time. The hold time specifies the length of time to remain at the stop frequency.
3.14.8 Return Time:
Press
〖
Return Time
〗
soft key and use the knob or numeric keypad to enter
the desired return time. The return time specifies the length of time to return from the stop
frequency to the start frequency.
3.14.9 Interval Time:
Press
〖
Interval Time
〗
soft key and use the knob or numeric keypad to enter
the desired interval time. The interval time specifies the time from one sweep to next sweep.
3.14.10 Trigger Source:
Press
〖
Source
〗
soft key. If internal mode is selected, the waveform
generator takes internal source and trigger sweep repeat running. When manual mode selected, the
waveform generator outputs one sweep each time you press
〖
Manual Trig
〗
soft key. When
External selected, generator takes external source, input external trigger signal from ‘Trig In/Out’
port in rear panel. Each effective trigger clock edge will trigger once sweep, the period of trigger
signal should greater than the total time of one sweep, as below formula shown:
