Datasheet
69 
7.7. 3 Trigger Output:   
Output Level:                                        TTL Compatible 
Input Impedance:                                  1kΩ 
7.7.4 Connector:          isolated with case, limited voltage for connector housing is 
±42Vpk  
7.8 Frequency Counter 
7.8.1 Frequency Range:     10mHz to 350MHz Resolution: 7 digits/s 
7.8.2 Measurement of Period and Pulse-width: 100ns to 20s 
7.8.3 Duty Cycle Measurement:          1% to 99% 
7.8.4 Count Measurement:                  1 to 9999999999 
7.8.5 Sensitivity: 
          20mVrms to 5Vrms                      10mHz to 150MHz     
          40mVrms to 5Vrms                      150MHz to 250MHz 
          100mVrms to 5Vrms                    250MHz to 300MHz 
200mVrms to 5Vrms                    300MHz to 350MHz 
7.8.6 Gate Time:                                1ms to 100s 
7.8.7 Trigger Level:                          -2.5V to +2.5V 
7.8.8 Couple Mode:                            AC, DC 
7.8.9 Low-pass Filter:                        enable or disable 
7.8.9 Connector:        isolated with case, limited voltage for connector housing is ±42Vpk 
7.9 Communication Port             
7.9.1 Interface type:                        USB Device, USB Host, LAN 
7.9.2 Connector:                                  connected with case grounded 
7.10 Clock 
7.10.1 External Clock Input 
Clock Frequency:                                  10 MHz ±50Hz 
Clock Amplitude:                                  100m Vpp to 5 Vpp 
Input Impedance:                                  300 , AC coupling 
Connector:                          isolated with case and other connectors 
7.10.2 Internal Clock Output 
Clock Frequency:                                  10 MHz 










