Spectrum - Deepace KC901M User Manual

Take the SPAN which is as small as possible to make the curve in the display area
go through one or two periods so that it can get the higher range resolution.
If connect the under-the-test transmission line through the patch cord, user
needs to do the user calibration on the end of the patch cord. In this time, the cable
length compensation needs to be set as zero in FUNC menu.
What chart4-5 shows is the typical curve when
cable electric length is 1.432m. The actual length which is already known is 1.005m.
The velocity coefficient can be calculated as 0.7018.
Chart 4-5: Measuring the Cable Electric Length in Phase Frequency Characteristic
When the cable's end is open circuit or short circuit, the cable loss is about half
of the return loss. When there is an antenna in cable connection, the echo loss in
antenna's non-working frequency can be used for evaluating the cable loss
preliminarily.

4.4 Spectrum

We have enhanced the performance of KC901M's input circuit. Therefore, it can
provide simple spectrum analysis display.
Warning:
KC901M's input port's maximal limit level is +20dBm. Limiting direct voltage is
15V. Once beyond them, the instrument will be broken immediately. When testing
the transmitter or the amplifier, a series of attenuators concatenated could assure
the input stays within the limitation at any time.
:
NOTice
testing
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the electric length. This