Tonghui TH2840 Series - Frequency; Level

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3.4.2 Frequency
Parameter setting attribute: numeric input.
The maximum range of the test frequency of this series is from 20 Hz to 2 MHz, and the
minimum resolution is: 0.001 Hz.
Note: The specific models have different support range for the frequency. For details, please
refer to the instrument selection guide. Here is a simple comparison description:
Instrument series model
Support range of Frequency
TH2840A, TH2840AX,
TH2840NX
20Hz~500kHz
TH2840B, TH2840BX
20Hz~2MHz
Frequency range and test frequency point
Frequency range (F)
Test frequency point
Resolution
20Hz<= F <= 99.999Hz
20.0000Hz，20.0001Hz ……99.9999Hz
0.0001Hz
100Hz <= F<= 999.9Hz
100.000Hz，100.001Hz ……999.999Hz
0.001Hz
1kHz <= F<= 9.999kHz
1.0000kHz，
1.00001kHz ……9.99999kHz
0.01Hz
10kHz <= F<=99.99kHz
10.0000kHz，
10.0001kHz……99.9999kHz
0.1Hz
100kHz<= F<=999.9kHz
100.000kHz，100.001 kHz……1MHz
1Hz
1MHz<= F<=2MHz
1.00000MHz，1.00001 MHz……2MHz
10Hz
Operation steps for setting test frequency:
Directly touch or use the arrow keys to move the cursor to the frequency domain;
There are two test frequency setting methods for single machine:
1) One is to use the number keys to input directly.
2) The other one is to use the soft key area (according to the prompts to perform frequency
increase and decrease enumeration operations);
3.4.3 Level
The test level is divided into AC level and DC level;
AC level is mainly used for AC LCR test;
DC level is mainly used for DC resistance test;
3.4.3.1 AC Level
Parameter setting attribute: numeric input.
The test level is set by the effective value of the test sine wave signal. The frequency of the sine
wave signal is the test frequency, which is generated by the internal oscillator of the instrument.
Either the test voltage value or the test current value can be set.
Voltage level range: 5mV ~ 20V.
Current level range: 50uA ~ 100mA