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Figure 9
Indirect connection
JD785A/JD786A
CAUTION
The maximum power for the Spectrum Analyzer RF In port is +25 dBm (0.316 W). If the
input signal level to be measured is greater than +25 dBm, use a High Power
Attenuator to prevent damage when you directly connect the signal to the instrument or
connect the signal from the coupling port of a directional coupler.
Selecting measurement mode
Procedure
1.
Press the MODE hard key.
2.
Press the Spectrum Analyzer soft key. The Measure Off mode is selected by default.
3.
To select a measurement mode, press the MEASURE hot key and then select the measurement
mode:
–
Channel Power
–
Occupied BW
–
Spectrum Emission Mask
–
Adjacent Channel Power
–
Multi-ACP
–
Spurious Emissions
–
AM/FM Audio Demod
–
Field Strength
–
Route Map
–
Dual Spectrum
–
PIM Detection > Single Carrier or Multiple Carrier
Configuring test parameters
Setting frequency
You need to set the frequency range to be measured with either the center frequency/span or the
start/stop frequencies. You can also set the frequency with the channel number and span.
Using Spectrum Analyzer
JD780A Series Analyzers
JD788A
59
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