• KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz
  • KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz
  • KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz
  • KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz
  • KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz

KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz

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KC901Q Vector Network Analyzer VNA RF Multimeter Spectrum Field Strength Signal Source 9KHz-20GHz


The KC901Q is a vector analyzer. It measures the amplitude and phase changes that occur after the signal passes through the device, while extending the spectrum, field strength, and signal generator functions, adding practicality to form a RF multimeter.

The KC901Q uses the basic architecture of the KC901x. However, the KC901Q does not have a built-in bridge. The basic function is frequency sweeper (providing amplitude and phase), which is significantly different from other instruments in the KC901 series.

The KC901Q can perform vector reflection measurements with an external bridge or directional coupler. The instrument has a built-in full-port calibration model that supports OSL calibration. Sweep measurements support response calibration (amplitude and phase).

Main Features:
- 9KHz-20GHz frequency range
- 1Hz frequency stepping
- Excellent accuracy and stability
- Double frequency conversion, strong anti-interference ability
- Rich in function and easy to carry

Main Functions:
- Frequency Sweeping Test: to get amplitude difference and phase difference
- Reflection Test: External directional coupler required
- Low Frequency and RF Signal Sources
- Spectrum Display and Field Strength Observation

- KC901Q is mainly used to debug various RF circuits, such as filters, amplifiers, splitters, and combiners. The product is externally connected to a suitable directional coupler or standing wave bridge to test the input and output impedance and evaluate the quality of the antenna system. With its receiver, it can also detect the signal amplitude of each level of the equipment, and perform field strength measurement and interference search in some frequency bands.
- KC901Q is a good tool for acquiring RF knowledge. For professional uses, it can be used in the fields of communication engineering, antenna manufacturing, and routine maintenance such as radar, microwave stations, satellite earth stations, and radio astronomy stations.

Its spectrum and field strength functions are not suitable for measuring pulse and wideband signals (eg radar, WIFI, Bluetooth), frequency hopping signals. In some cases, qualitative observations can be completed by experienced engineers, but we cannot guarantee that every user can complete it.

Any test should not have strong interfering signals in the 109-110MHz range. Some broadcast transmitting stations have 109MHz spurs. If the antenna is measured near the transmitting station, it will affect the accuracy of the instrument.

Basic Technical Parameters (Parameters varies according to different development periods):

- Effective Frequency: Min. 9KHz; Max. 20GHz
- Settable Frequency Spectrum/Transmission: Max. 30GHz
- Effective Frequency Range (Reflection) : 5KHz-20GHz depends on external orientation device
- Settable Frequency Range (Reflection): Min. 5KHz; Max. 30GHz
- Scanning Range @SPAN: Min. 1KHz; Max. 29.99GHz
- Scanning Points: Min. 450pt; Max. 3150pt (Local Host Operation)

Frequency Resolution:
- For All Scanning Functions: Typical 1Hz
- For Low Frequency Signal Source: Typical 0.1Hz

- Level Resolution: Typical 0.01dB

Phase Resolution: Typical 0.01°
- RBW=30KHz, Each Point: Typical 1.2ms
- RBW=10KHz, Each Point: Typical 1.5ms

Scanning Speeds:  
- RBW=3KHz, Each Point: Typcial 2.4ms
- RBW=1KHz, Each Point: Typcial 4ms
- RBW-30K, 450pt Every Screen: 0.6s

- Output Level @1MHz-7GHz: Min. -10dBm; Typical 6dBm; Max. 10dBm

Scanning Modes:
- @7GHz-20GHz: Min. -13dBm; Typical 0dBm; Max. 6dBm
- @20GHz-26GHz: Min. -20dBm; Typical-13dBm; Max. -6dBm (Not guaranteed)

Max. Output Levels:
- @1MHz-7GHz Signal Source: Min. 3dBm; Typical 10dBm; Max. 13dBm
- @7GHz-20GHz Signal Source: Min. -13dBm; Typcial 0dBm; Max. 6dBm

- Output Attenuation@9KHz-7KHz: Min. 0dB; Max. 25dB (Audio signal source can provide 60dB digital attenuation)


- @1MHz-7GHz: Min. -101dBm; Typical -107dBm; Max. -113dBm (Port 2)
- @7GHz-15GHz: Min. -98dBm; Typical -104dBm; Max. -110dBm (RBW=1KHz)
- @15GHz-22GHz: Typical -95dBm; Max. -101dBm

Dynamic Range of Transmission & Measurement:
- @1MHz-1GHz: Min. 95dB; Typical 100dB (Equivalent to transceiver channel isolation)
- @1GHz-2GHz: Min. 85dB; Typical 90dB
- @2GHz-15GHz: Typical 70dB (Block the port with a load. This indicator is not reliable, and the actual use is to reduce the margin by 20dB.)
- @15GHz-24GHz: Typical 60dB
- @24GHz-26.5GHz: Typical 40dB

Amplitude Uncertainty of Transmission & Measurement:
- @1MHz-20GHz: Typical 0.5+0.1L (Connect Port 1 and 10dB attenuator in series to improve mismatching error)
- After straight-through calibration, insertion loss L<40dB

Zero Offset Drift of Insertion Loss:
- Compensation for Existing Insertion Loss: Typical 0.1dB (After preheating for 5min)
- L<30dB, 1MHz-15GHz

Calibrated Directionality when Directional Device Directivity is Better than 15dB:
- @9KHz-7GHz: Typical 45dB (An external orientation device is required)
- @7GHz-15GHz: Typical 40dB
- @15GHz-20GHz: Typical 35dB
- @20GHz-26GHz: Typical 25dB

Uncertainty of Return Loss:
- After straight-through calibration, 3dB<RL<25dB, 1MHz-20GHz: Typical 1.5+0.1RL (An external orientation device is needed)

Phase Uncertainty:
- @9KHz-10MHz: Typical 5° (When loss is 20dB)
- @10MHz-7GHz: Typical 3°
- @7GHz-15GHz: Typical 8°
- @15GHz-20GHz: Typical 15°

Uncertainty of Frequency Spectrum:
- @1MHz-7GHz: Typical 1.5dB (CW Signal)
- @7GHz-26.5GHz: Typical 3dB

Ports’ VSWR:
- Port 1 @1MHz-7GHz: Typical 1.5 (Dynamic Value)
- Port 1 @7GHz-20GHz: Typical 2.0
- Port 2 @1MHz-7GHz: Typical 1.5
- Port 2 @7GHz-20GHz: Typical 2.0

LO Leakage:

- @<6GHz: Typical -40dBm; Max. -20dBm
- @≥6GHz: Typical -30dBm; Max. -20dBm

IF Feedthrough Suppression:
- @<6GHz: Typical 10dB (109.65MHz)
- @≥6GHz: Typical 30dB

- 1st IF Image Rejection: Typical 0dB
- 2nd IF Image Rejection: Typical 40dB

- Frequency Stability of Each Year: Typical 0.3ppm; Max. 1ppm
- Charging Port: Min. 11V; Max. 32V

Voltage of Power Supply:
- For AC Power Adapter: Min. 105V; Max. 230V
- For Built-in Electricity: Min. 6.5V; Max. 8.4V

Temperature Range:
- For Normal Uses: Min. 0℃; Max. 45℃
- Applicable: Min. -40℃; Max. 55℃

- Humidity: Max. 95% (Non-condensation)
- Dimensions: 200 x 114 x 46mm (L*W*Thickness)
- Weight of Main Unit: 1.2kg

Package Included:
- 1 x KC901Q VNA

- The KC901Q does not have S11 factory calibration data due to the absence of a built-in bridge. After the external directional bridge is attached, calibration must be performed. If a bridge or coupler is often used, system calibration can be done for them for future use. If it is only for temporary measurement, only user calibration can be performed. The disadvantage of user calibration is that once the frequency is changed, the calibration fails.
- When the temperature is over 0-45℃, please calibrate again when it preheats stably. Especially in the range of -40 to -20℃, it should be preheated for at least 5 minutes and continuous operation is required. Due to the heat of the device itself, the case temperature may be higher than the ambient temperature of 25℃, in the environment above 45℃, please pay attention to avoiding burns. When used in an environment exceeding 60℃, battery (battery is not included) must be removed, otherwise the temperature may exceed 85℃ and cause danger.
- Battery is not included in this package.

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