KC901S+ Handheld Spectrum Analyzer


KC901S+ handheld 
Spectrum Analyzer

handheld  Spectrum Analyzer is a “RF multimeter”. It offers the capabilities of single port vector network analysis and dual port scalar network analysis, also with spectrum, field strength and signal generator functions. It is a powerful and useful handheld instrument for RF engineer both in lab and on the field.. 

Handheld handheld  Spectrum Analyzer

  • Test frequencies up to 4GHz with 1Hz resolution and stability better than 1ppm.
  • Providing vector measurement on S11 with 0.01 phase resolution and 0.01db amplitude resolution.
  • With vector measurement capability of S11, it shows the smith chart, RL(Return loss), characters of phase position, and frequency.
  • In S21 scalar measurement, it has the function of single frequency S21 within range of 100dB.*
  • With its non-volatile calibration data built-in, on site calibration is not necessary if performing a qualitative measurement. While performing rigorous test, you may use the SOL to enhance the calibration.
  • A handy field strengthen meter with a high dynamic range.
  • Built in DDS, audio signal source function.
  • Data can be saved in the Memory Card or be transferred into PC via USB.
  • 3.5 inch color-display -Excellent response speed with accurate key feeling, less than 3s ready to use.
  • Functions are stable and reliable with the excellent hardware/software design.

  KC901S+ technical parameters 
Item Measurement Condition Parameter Note
Lowest Typical Highest
Frequency Range Effective 9KHz 4GHz
SPEC mode is settable 0 4.1GHz
Sweeping Range SPAN 1KHz 4GHz
Sweeping Point 450pt 3150pt Operation
Frequency Resolving Power All sweeping functions 1Hz Spectrum Analyzer etc
All single-frequency-point function 0.1Hz Signal source etc
Electrical Level 0.01dB
Phase Resolving Ability 0.01°
Sweeping Speed RBW=30KHz,per point 1.2ms
RBW=10KHz,per point 1.5ms
RBW=3KHz,per point 2ms
RBW=1KHz,per point 3ms
RBW=30K,450pt per screen 0.5s
Output Electrical Level 1MHz-5GHz -10dBm 0dBm 6dBm 1 port
1MHz-5GHz 0dBm 6dBm 10dBm 2 ports
5GHz-6.8GHz -20dBm 0dBm 1 port
5GHz-6.8GHz -10dBm 6dBm 2 ports
Output Attenuation 0dB 30dB
Sensitivity 1MHz-5GHz -107dBm 1 port RBW=1KHz
5GHz-6.8GHz -94dBm
Transmission Measurement’s Available Dynamic Range 1MHz-1GHz 100dB Equivalent to transceiver path’s insulation
1GHz-2GHz 70dB
2GHz-6.8GHz 60dB
Uncertainty of Transmission’s Range After bypass calibration,when insertion loss less than 60dB 0.3+0.05L
Insertion Loss’s Zero Drifting When compensation’s existing insertion loss less than 30dB 0.05dB
Bridge’s Absolute Directionality 9kHz—1MHz 18dB 90% section is credible
1MHz—6.8GHz 20dB
S11 Relevant Directionality 9kHz—3GHz 45dB After calibration,90% section is credible
3GHz—6GHz 35dB
6GHz—6.8GHz 30dB
Uncertainty of Return Loss After bypass calibration,when 3dB<RL<25dB 1.5+0.1RL
Uncertainty of Phase 9kHz—1GHz Reflection coefficient, when ρ>0.25



Item Measurement Condition Parameter Note
Lowest Typical Highest
Port’s VSWR Port 2,1MHz-3.5GHz 2.0 Static value
Port 1,1MHz-3.5GHz 2.0
Local Oscillator’s Leakage Port 1 -30dBm -10dBm
Medium Frequency’s Free-through Suppression Degree 40dB
Frequency Stability, per year 1ppm
Power Voltage Charge interface 11V 32V
AC-DC power adaptor 105V 230V
Inner battery 6.5V 8.4V