Chapter IV Operation Guidance
51
Fig. 4-33 Digital Voltmeter Range Setting Window
The digital voltmeter should be subject to zero calibration before the test. Fig. 4-32 shows the
digital voltmeter display window. Click “he digital voltme on the touch screen or the [Zero
Calibration] soft key in the right side for zero calibration of the digital voltmeter. Note that all
connections should be disconnected before zero calibration.
Display of measurement results:
In the digital voltmeter display window shown in Fig. 4-32, click the [Unit] soft key in the
right side of the touch screen for port setting and select the appropriate unit.
In the digital voltmeter display window shown in Fig. 4-32, click the [Resolution] soft key in
the right side of the touch screen for port setting and select the appropriate resolution.
The averaging of measurement results can be set according to the stability requirements. If
“he avera is ON, the measurement result will be displayed after averaging according to the
set times.
CAUTION:
One port is shared for external audio input and digital voltmeter
signal input. If the tested signal is within the measurement range but
the level cannot be easily estimated, the large range can be applied to
determine the input level, and then the small range will be applied to
make measurement results more accurate.
4. Setting of audio oscilloscope
The oscilloscope function of 4992A has the function of intuitive measurement display of
low-frequency signals of the external audio, DVM or interval receiver signal after demodulation.
This is designed for the external audio/DVM interface. The user should estimate the level range of
the input signal, and select the appropriate range. The operation interface is shown in Fig. 4-34.
Window opening: open the oscilloscope window by pressing the [Measurement] hard key
and setting the instrument menu, and press the [Full Screen] hard key in the lower part of the
screen to maximize the window, as shown below.
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Summary of Contents for 4992A
Page 1: ...I 4992A Radio Test Set User Manual China Electronics Technology Instruments Co Ltd...
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Page 23: ...Article I Handling Instructions 11 Article I Handling Instructions...
Page 93: ...81 Article II Technical Specifications...
Page 132: ...Article III Maintenance Instructions 120 Article III Maintenance Instructions...
