MFJ MFJ-207, Инструкция по эксплуатации

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MFJ-207 Instruction Manual HF 10-160M SWR Analyzer
INTRODUCTION:
The MFJ-207 gives you a direct readout of your antenna’s SWR without the need for formulas or indirect
readings. The MFJ-207 can also be used to adjust a tuner to match your antenna without the need for
transmitting. The frequency coverage for the MFJ-207 is from below 1.75 MHZ to Above 30 MHZ in 5 user
selectable bands.
FEATURES
Portable –
The MFJ-207’s light weight, small size and internal battery capability makes it great for Field Day,
Travel or any time you need to check out a new antenna installation quickly easily.
Accurate – The Bridge Circuit uses precision resistors for utmost in accuracy.
Great Value – The MFJ-207’s low cost puts a great instrument in your hands for those who only need to adjust
their antennas occasionally.
Stable – With built in AGC the MFJ-207 is accurate across the bands. No false readings.
Rugged Construction: Attractive all-metal cabinet, conservative component selection and extensive RF
filtering ensure solid performance for years to come. Fully covered by MFJ’s “No Matter What” one year
limited warranty.
Before attempting to operate your MFJ-207, please read the manual thoroughly. It contains important detail
about setting up your unit to obtain the best performance.
USES FOR THE MFJ-207 HF 10-160M SWR ANALYZER
Your MFJ-207 SWR ANALYZER has many uses. It can be used to find the resonant frequency of your
antenna, to find the SWR of your antenna at a particular frequency, and to find the frequency at which your
antenna has the lowest SWR. You can also use the SWR Analyzer to adjust your antenna to a low SWR and to
adjust an antenna tuner to match the transmitter to your transmission line. You can even find out if your
antenna is resonant on more that one frequency.
Measurement of the antenna’s SWR is done right at the input to the transmission line. There is no need to
climb the tower and measure the SWR at the antenna. Also handy for suspended dipoles. Using the chart in
Appendix C and knowing the line loss for your transmission line and the SWR at the line input, you can
determine the SWR at the antenna, regardless of line length.