Specifications

Troubleshooting tools include:
q
Service Log: Error codes will be written to the service log along
with some data representing system conditions at the time of
failure.
ALC Error Codes:
ALC1 LVLD FAIL Source 1 ALC Leveled Failure
ALC2 LVLD FAIL Source 2 ALC Leveled Failure
q
ML243XA Power Meter
q
MA247XA Power Sensor
The presence of these error codes do not necessarily indicate an instru
-
ment failure. They simply indicate that an RF unleveled condition existed
under a specific condition. For example, when the RF output level is set to
a value exceeding the maximum power output range, the instrument will
display these error codes. However, they do indicate that a failure condi-
tion does exist if the RF output level is within the power output range of
the instrument.
It is useful to verify the ALC calibration as follows:
1. Connect the GPIB port of the Power Meter to the Dedicated GPIB
port of the MS462XX and perform a new ALC calibration.
2. Press the Utility front panel key.
3. Select the menu soft keys as follows:
DIAGNOSTICS
HARDWARE CAL
SOURCE ALC CALIBRATION
4. Check the source module cabling and the cabling to the components
on the Receiver Module.
5. Use the a1/1 user defined measurement mode to compare the leveled
port power level (0 dBm) and the unleveled port power (+20 dBm).
6. Press the Power front panel key.
7. Select the menu soft keys as follows:
SOURCE 1 SETUP
SOURCE 1 POWER
6-14 MS462XX MM
HARDWARE TROUBLESHOOTING TROUBLESHOOTING