Installation guide

Troubleshooting
Troubleshooting Unlevels and the RF Path
1-74
Troubleshooting a Leveling Problem
NOTE Before proceeding to troubleshoot with this section, run a full self-test and correct any reported
failures and unlock problems. (Refer to “Self-Test Failures and Related Troubleshooting” on
page 1-19 and “Troubleshooting Unlocks” on page 1-68.)
❏ Check the RF path power level against the values in Table 1-33.
— If the instrument cannot achieve the maximum power levels listed in Table 1-33,
perform the ALC Calibration and the Power Level Accuracy, High Power Calibration.
(Refer to the Calibration Guide.)
— If these adjustments fail or the instrument still cannot achieve the maximum power levels listed in
Table 1-33, proceed to “Troubleshooting the RF Path” on page 1-76.
❏ Check for an Unleveled Annunciator
— If the Unleveled Annunciator is on:
1. Check that the signal generator's amplitude is not set higher than the maximum level specified on
the Specifications data sheet.
— If the unleveled indication turns off after resetting the amplitude, the signal generator is
operating correctly.
2. Check that the signal generator's RF output is terminated into 50 ohms.
— If the unleveled indication turns off after terminating the RF output into 50 ohms, the signal
generator is operating correctly.
— If the Unleveled Annunciator remains on:
1. Use a spectrum analyzer to check the RF signal level at the RF Output connector.
— Signal Generator Setup
a. Set
ALC On/Off to Off
b. Set
Amplitude to +25 dBm
c. Set
Modulation to Off
d. Set
RF On/Off to On
e. Set
Sweep to Frequency
f. Set
Sweep Type to Step
Table 1-33
Frequencies Standard Power Option UNB
250 kHz to 1 GHz +13 dBm +17 dBm
> 1 GHz to 3 GHz +10 dBm +16 dBm
> 3 GHz to 4 GHz +7 dBm +13 dBm
> 4 GHz to 6 GHz (Option 506) N/A +10 dBm