VC3165 INTELLIGENCE FEQUENCY COUNTER
Contents
1. IMQ X1 X20 Max safety voltage 30V DC AC peak 2 CH B S0MHz 2 4GHz from SOMHz to 2 4GHz Attenuator Frequency range Sensitivity 50mVrms 300mVrms Coupling AC only Input impedance 50Q Max safety voltage 3V 3 Resolution Resolution depends on gate time control setting 4 Time base short time stability 3X10 second Long time stability 2X108 month Temperature drift coefficient 1X107 10 C 40 C 1X107 for line voltage 10 Continuously variable from 100ms to 10s 8 digit 19X12 5mm LED with steps frequency period kHz s and MHz ms indicator standard time error t x frequency 1d 220V 110V 10 50Hz or 60Hz 10 20 minutes Line voltage variation 5 Gate time 6 Display 7 Precision 8 Power supply 9 Preheat time 10 Operation environment 5 C 50 C 10 90 R H Storage environment 40 C 60 C 5 90 R H 11 Weight 12 Dimension Approx 1 6kg 270mm X 215mm X100mm 13 Accessories Manual power cord test probe OPERATION 1 REQUIREMENTS a Power AC 220V 110V 10 max consumption 5W b Before measuring turn the unit on for 20 minutes This preheats the unit amp the crystal oscillator to ensure accurate readings amp stability 2 PANEL DESCRIPTION 1 CH A port 2 CH B port 3 Frequency indication LED 4 Period indication LED 5 LED display 6 KHz s indication LED 7 MHz ms indication LED 8 RESET key 9 PERIOD key 10 CONF2. frequency measurement of BP controlling and controlled telephone interphone user may set the function key to 2 step position Connect one of feet of a 5pF capacitance to red clamp of test cable the other as probe to directly contact frequency point then frequency value will be measured VC3165
3. signal to be measured if frequency is less than 100Hz press AC DC coupling key down 3 If input signal amplitude is high then press ATT key down to ensure the instrument measures an attenuated signal 4 When the FUNCTION key is pressed the last digit display value is the current selection step for figure 2 1 2 step 2 Figure 2 1 frequency measurement has only three steps 1 3 and its circle displaying Figure 2 2 po a 2 3 5 Complete steps 1 3 press CONFIRM key the instrument will start working and display result unit etc 6 Gate time may adjust variably 7 When measuring 100Hz signal the instrument will auto enter into equal precision measurement state Period measurement On frequency measurement state press PERIOD key instrument will start measuring period and display test result working state and unit simultaneously 3 WARNING 1 When measuring high voltage or strong RF signal by cable input cables should be in series with large resistance to prevent damage Wireless input of very strong signals should be measured in coarse mode to avoid damage 2 When instrument is working abnormally or goes dead only press the RESET key once or turn off power once to reset the system 3 When there is no input signal instrument display may not be zero This is normal it doesn t effect measurements or accuracy 4 Avoid exposing this instrument to extreme temperatu
4. 1 INTELLIGENCE FREQUENCY COUTER OPERATION MANUAL INTRODUCTION Resolution Step Coupling Tred BASES Gate time min Gate time max 1 AC 1GHz 2 4GHz 1kHz 100Hz 50MHz 1GHz i AL no including 1GHz leg me 2 AC 2MHz 50MHz 1kHz 10Hz 3 AC 100Hz 2MHz 10Hz 0 1Hz 0 01Hz 100Hz ae no including 100Hz UANL It is a high resolution multifunction intelligent frequency counter based on microprocessor Features include frequency period and equal precision measuring Also 3step function selection work state unit and eight digit LED display All function depend on a single CPU A crystal controlled temperature circuit provides constant compensation for temperature change thereby reducing The CH B input has an attenuator x1 x20 amp AC DC coupling for a low pass filter measurement errors typically caused by temperature drift The instrument measures signals over a wide range from 0 01Hz to 2 4GHz The gate time is continuously variable from 100ms to 10s The instrument provides high performance stability amp function at a low cost Note Read this chapter carefully before using your instrument retain these instructions ELECTRICAL SPECIFICATIONS Input characteristics 1 CH A 0 01Hz 50MHz DC couple 0 01Hz to 100Hz AC couple 100Hz to 5 OMHz AC 100Hz 50MHz lt 120mVrms DC 0 01Hz 1Hz lt 500mVp p frequency range Sensitivity eo 1Hz 100Hz lt 80mVrms Input impedance
5. IRM key 11 FUNCTION key 12 ATT key 13 AC DC COUPLING key 14 GATE TIME knob 15 POWER SWITCH 16 220V 110V Transform SWITCH 17 POWER JACK and FUSE BOX Note 11 FUNCTION KEY including 3 steps 1 Step 5OMHz 2 4GHz range from CH B input measurement unit indication MHz ms 2 Step 2MHz 50MHz range input from CH A measurement unit indication MHz ms 3 Step 0 01Hz 2MHz range input from CH A measurement unit indication kHz s These are frequency measurement steps and FREQ indication LED flicker 9 PERIOD KEY Press the key down the instrument will enter into period measure mode 10 CONFIRM KEY Press the key down the instrument will start working according to preset state 13 AC DC COUPLING KEY Press the key down for DC measurement push the key up for AC measurement 8 RESET KEY when instrument is abnormal press it once to reset 12 ATT KEY Press the key down for attenuated 20dB measurement push it up for no attenuator 2 OPERATION STEPS First connect power cord AC220V 110 50Hz or 60Hz and set power switch to ON position Allow unit to warm up for 20 minutes to ensure accurate readings Frequency measurement 1 Select CH A or CH B depends on the range being measured and connect to signal source by cable 2 For
6. res damp conditions dirt dust chemical contamination etc Do not remove the cover for electrical shock could occur 5 When instrument working on strong interference source sensitivity will reduce 4 FOR EXAMPLE 1 Connect power cable to AC220V 110V power socket 2 Setting power switch to ON position and preheat for 20 minutes 3 Connect attach test cable to input port on front panel according frequency range to select CH A or CH B 4 Select proper function step and gate time Gate time is shorter measuring on 3s frequency speed is faster but resolution is lower however gate time is longer measuring frequency speed is slower but resolution is higher 5 If measure period press down PERIOD key 6 Press down CONFIRM key then instrument start working EXAMPLE 1 Analog handset measurement user may connect test cable to input CH B and set the FUNCTION key to Istep position gate time may be selected by need manual adjust from 100ms to 10s Figure 5 1 and figure 5 2 are LED display reads 1 Figure 5 1 Istep 9101010101012 Figure 5 2 900MHz EXAMPLE 2 30MHz interphone emit frequency measurement user may set the function key to 2 step position and gate time may by selected by need manual adjust from 100ms to 10s Figure 5 3 and figure 5 4 are LED display reads 2 Figure 5 3 2 step 3 0 0 0 0 0 1 Figure 5 4 30MHz EXAMPLE 3 Self oscillation
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