Installation guide

Troubleshooting
Troubleshooting Unlevels and the RF Path
1-75
g. Set
Start Frequency to 250 kHz
h. Set
Stop Frequency to 1 GHz
i. Set
Number of Points to 500
— Spectrum Analyzer Setup
a. Set
Start Frequency to 225 kHz
b. Set
Stop Frequency to 1.25 GHz
c. Set
Reference Level to +30 dBm
d. Set
Display to Max Hold
2. Connect the RF output of the signal generator to the spectrum analyzer.
3. Measure and record the minimum power level.
4. Set the signal generator and spectrum analyzer start/stop frequencies
to the next start/stop frequencies in Table 1-34.
5. Measure and record the minimum power level at each start/stop frequency.
— If any of the frequency ranges do not produce power levels equal to the maximum leveled power
shown in Table 1-33, set the signal generator to the frequency with the lowest power level and
measure the power with a power meter.
— If the power level is low, troubleshoot the RF path before proceeding.
— If the RF signal levels are good, turn ALC On and set the signal generator to
maximum-leveled power.
Note the frequencies where the unleveled condition occur. Later, when troubleshooting in
ALC Off mode, the unleveled indication is turned off.
For each of the unleveled conditions listed, always start with the signal generator set to the
following settings.
a. Set
ALC Mode to ALC Off
b. Set
Amplitude to +25 dBm
c. Set
Attenuator Hold Mode to On
d. Set
RF On/Off to On
e. Set
Modulation to Off
Table 1-34
Signal Generator Spectrum Analyzer
Start Stop Start Stop
1 GHz 3 GHz 999 MHz 3.1 GHz
3 GHz 4 GHz 2.99 GHz 4.1 GHz
4.000000001 GHz 6 GHz 4 GHz 6.1 GHz