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DC Adjustment Procedure (cont’d)
Adjustment Procedure
1. Reset the AFG:
*RST;*CLS Reset AFG and clear
status registers
2.
Enable calibration on the AFG:
CAL:SEC:STAT OFF, <security code> Cal security off
where <code> is the AFG’s security code (factory-set to "E1445A").
3. Send the command to start the DC adjustment routine and wait for the
command to complete:
CAL:DC:BEGIN
*OPC?
The AFG will return a "1" when ready.
Repeat steps 4 through 6 for calibration points 1 - 44:
4. If the current calibration point is listed in Table 3-2, set up the DMM
as specified. Otherwise, do not change the DMM settings. Note the
special instructions for the following points:
Cal Point 31. Immediately after performing the DMM
measurement for cal point 30 (and before sending the reading to
the AFG) set the DMM range to 10 V. This will prevent an
overload when the AFG sets itself for the next reading.
Cal Point 41. Immediately before setting up the DMM for cal
point 41, take a reading using the DMM settings for cal point 40.
This will provide a DC offset reading. Next, set up the DMM
for cal point 41 as specified in Table 3-2. Then use the DC offset
reading and Table 3-1 to determine the appropriate DMM range
for subsequent calibration points.
Cal Point 43. Same instructions as cal point 41.
88 Adjustments Agilent E1445A Service Manual