Anritsu 682XXB - Manual (Page 132)

4-9
RF LEVEL CALIBRATION RF level calibration requires the use of an automated test system. A
computer-controlled power meter measures the 682XXB/683XXB
power output at many frequencies throughout the frequency range of
the instrument. Correction factors are then calculated and stored in
non-volatile memory (EEPROM) located on the A17 CPU PCB.
This calibration is required following replacement of either the A9 PIN
Control PCB, the A10 ALC PCB, the A14 SDM, SQM Driver PCB, the
Switched Filter Assembly, the 0.01 to 2 GHz Down Converter Assem-
bly, the 0.5 to 2.2 GHz Digital Down Converter Assembly, the
Switched Doubler Module (SDM), the Source Quadrupler Module
(SQM), the Forward Coupler, the Directional Coupler, or the Step
Attenuator.
The RF level calibration software is available from ANRITSU by order-
ing:
G Part number 2300-104, Version 2.0 and above, for all £50 GHz
682XXB/683XXB models.
G Part number 2300-209, Version 1.00 and above, for 60 GHz and
65 GHz 682XXB/683XXB models.
This calibration program warrants level accuracy specifications from
maximum power to –70 dBm. For calibration below –70 dBm, the
682XXB/683XXB must be returned to your
ANRITSU service center for
calibration. The RF level calibration software comes on a 3.5-inch/
1.44 Mbyte, MS-DOS formatted floppy disk.
For information concerning test equipment requirements and ordering
the automated program, contact your
ANRITSU service center (refer to
Table 1-5 on page 1-18).
4-22 682XXB/683XXB MM
RF LEVEL
CALIBRATION CALIBRATION