Wutong Electronic NWT4000-1 User Manual

1
NWT4000-2 RF DIGITAL
SWEEPER & ANALYZER
USER MANUAL
Manufacturer:
WUTONG ELECTRONIC
site：http://bg7tbl.taobao.com
TEL: +86134 2795 9750
Q Q: 1630 2767
Email: bg7tbl@126.com
version: V2.0
date: 2014-10-20
This document is based on the original manual from the supplier, edited
and updated by Kurt Poulsen (OZ7OU)
The document and applied editing and updates devoted entirely to
document the NWT4000-2 25MHz-4.4GHz unit (using 2xADF4351 PLL’s)but will
also be useful for the NWT4000-2 and NWT4000-1 series going from 138MHz to
4.4GHz (using 2xADF4350 PLL’s). However, the latest NWT4000-2 where the
SMD connector are on top of the PCB (and not at the edge) has improved
screening and far better dynamic range. Watch our when building it into a case
to use a plastic case. Using a metal case will most likely give elevated noise
floor by several dB in the GHz region.
Watch out that you do not purchase the version in a case with two SMA
connectors and a Green LED in between (believing it is a NWT4000 version), as
it most likely will only have 1 PLL (ADF4350 for 138MHz version and ADF4351
for 25MHz version) and thus only is a signal generator and spectrum analyzer,
not being able to sweep the frequency response of devices.
May 2015 edition

Wutong Electronic NWT4000-1 Specifications

General

Frequency Range	9 kHz to 4 GHz
Output Impedance	50 Ω
Interface	USB, LAN
Weight	4.5 kg
Output Power	0 dBm
Display	TFT LCD
Power Supply	AC 100-240V, 50/60Hz

Summary

Instrumental composition and technical characteristics

Basic parameters and accuracy

Details fundamental parameters, system accuracy, and physical characteristics of NWT models.

Conditions of use

Hardware connection and software guide

WINNWT software installation

Guides through the installation process of the WINNWT software and USB driver.

Setting the COM port

Logarithmic Y scale sweep frequency settings

Sweep setup and parameter configuration

Calibration and trace management

SWR measurements

SWR measurement procedures

Details SWR measurement, frequency settings, and calibration using an external bridge.

SWR examples and bridge investigation

Impedance - |Z| measurements

Numerical impedance measurement and mode selection

Measuring device connection methods

Antenna, LC, and amplifier measurements

Spectrum Analyzer

Spectrum Analyzer functionality

Explains how the NWT4000-2 functions as a spectrum analyzer using its PLL.

Wattmeter functions

Wattmeter usage and calibration

Details how to use and calibrate the Wattmeter for accurate measurements.

The VFO mode

Frequency calibration

Calibration preparation and setup

Details preparation for 1GHz calibration and setting VFO mode for measurement.

Appendix 4: Sweep calibration and frequency calibration

NWT4000 sweep calibration steps

Outlines the general procedure for calibrating NWT4000 sweep functions.

Flatness calibration procedure

Details the specific steps for achieving flat frequency response calibration.

Frequency calibration procedure

Explains the procedure for calibrating the instrument's frequency accuracy.