N1201SA VNA – VSWR read out compared to Diamond SX400

Diamond SX400 VSWR Meter features

So for quick specifications the Diamond SX400

The SX400 measures forward and reflected power and VSWR. Compact size makes meter useful for testing both base and mobile installations.

• Illuminated meter
• Switchable r.m.s. or peak power
• Measures forward, reflected & VSWR power
• 6″W x 2″H x 4″D, 2 lbs.
Frequency: 140-525 MHz

NS1201SA Vector Impedance Analyzer features

N1201SA series is the handheld radio frequency vector impedance measurement analysis instrument, easy to use, simple operation. Built-in high capacity lithium ion battery for mobile and outdoor use.


Working frequency: 140MHz~2700MHz
Actual frequency : 137.5~2700MHz
Stepped frequency: 1kHz
Display: 2.4″ TFT trdp
Resolution ratio: 320 x 240(QVGA)
Battery capacity: 2000mAH(7.4Wh)
Power consumption: <1.5W Charge current: 400mA Charge port: USB Auto power off can be set 5-60minutes. Measured parameters: Resistence, Reactance, Standing wave, S11 Resolution ratio: 4 number Frequency accuracy: about 5ppm Connector: SMA-K Measurement range: Impedance: 0.1~1000 Standing wave: 1.000~65 S11(dB): 0dB~-60dB Working temperature: 0~40℃ Atmospheric pressure: 860hPa~1060hPa This instrument has four interfaces: single point measurement, scanning, system information, correction and calibration The default boot into single-point measurement interface.

Measurement comparison on VSWR Readings

With both of the device specifications presented we are ready to proceed and compare the actual measurement on VSWR readings and compare the accuracy of the read out against each other. Please see the video below of actual comparison of VSWR read out on both device.

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Ephraim Gariguez

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