TFG6800 Series Function/Arbitrary Waveform Generator Users’ Guide
Suin Instruments Co., Ltd
67
Connect the external measured signal to ‘Counter ’ connector on rear panel, then to measure the
frequency count of external signal. Press
〖
Measure Type
〗
to show type selection menu.
Press
〖
Freq
〗
softkey to measure and show frequency of test signal.
Press
〖
Period
〗
softkey to measure and show period of test signal.
Press
〖
Width
〗
softkey to measure and show pulse width of test square signal and pulse signal.
Press
〖
Duty Cyc
〗
softkey to measure and show duty cycle of test square signal and pulse signal.
3.18.1 Gate Time
Press
〖
Gate Time
〗
softkey then select ‘Gate Time’ to configure the desired gate time. The gate
time indicates the sampling interval time of tested signal, the longer the gate time is, the more the
sampling data, so the users may get more stable measurement result and higher measurement
resolution. But it can’t reflect the rapid change flexibly. And the shorter the gate time is, the better
the tested signal is tracked, but short gate time will result in low measurement resolution.
Generally, gate time should be longer than the period of tested signal.
3.18.2 Trigger Level
Press
〖
Trig level
〗
softkey then select ‘Trig levl’ to configure the desired trigger level value. Set
the trigger level to be 0 if using AC coupling and adjust the trigger level if using DC coupling. The
influence for trigger level adjustment is small if the amplitude of tested signal is higher. But if the
amplitude of measured signal is lower or frequency is higher, you need adjust the trigger level
carefully to get a better result.
3.18.3 Sensitivity
Press
〖
Sensitiv
〗
softkey then select ‘Sensitive’ to configure the desired sensitivity value. The
bigger the value is, the higher the sensitivity is. The influence for sensitivity adjustment is small if
the tested signal has a big amplitude, and very neat. But if the amplitude of measured signal is
very small and the signal contains noise, you need adjust the sensitivity to get a better result.
If the measured frequency value is bigger than the actual one, the result is considered to include
the noise. Then the sensitivity should be reduced. If the measurement result is smaller than the
actual value or even 0, the sensitivity should be enhanced.
The sensitivity should be adjusted from low to high. The result is considered to be reliable when it
get stable.
3.18.4 Coupling Mode
Press
〖
Coupled
〗
softkey to choose between AC or DC. If frequency of measured signal is higher
