PeakTech 4105 Bedienungsanleitung Seite 110

5.10.4 Sweep Mode
After enabling sweeps, press the 〖Mode Line/Log〗 softkey again to toggle between the linear or log
mode.
Under linearity sweeping mode, the frequency step is fixed, but a fixed frequency step always does a
bad effect when sweeping comparatively wide-range frequency. In that case, the resolution is high
when sweeping high stop of frequency, the frequency changes slowly, and the sweeping is fine. But
the resolution is low when sweeping the low end of frequency, the frequency changes very quickly,
the sweeping is rough. So linearity sweeping is applicable only for sweeping with narrow frequency
range.
Under logarithm sweeping mode, the frequency step value is not fixed but changes according to
logarithm relation. When sweeping the high stop of frequency, the frequency step value is
comparatively large; when sweeping the low end of frequency, the frequency step value is
comparatively small. The frequency change is comparatively average for sweeping with wide
frequency range. So logarithm sweeping is applicable for sweeping with wide frequency range.
5.10.5 Sweep Time
After enabling sweeps, press 〖Sweep Time〗softkey. Then 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.
5.10.6 Hold Time
After enabling sweeps, press 〖Hold Time〗 softkey. Then use the knob or numeric keypad to enter
the desired sweep time. The hold time specifies the number of seconds to remain at the stop
frequency. This allows the stop frequency to be sustained for a set time.
5.10.7 Return Time
After enabling sweeps, press 〖Return Time〗 softkey. Then use the knob or numeric keypad to enter
the desired sweep time. The return time specifies the number of seconds to return from the stop
frequency to the start frequency. No matter sweep mode is Linear or log, linear sweep will be the only
mode on return sweep.
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