HP 3468A - Page 66

Command
Codes
(Cont'd)
Function
Qualifier
Description Example
B 1
Byte 2: Status bits
Bits 7,6,5 are not used (always 0).
oan
Bit is calibration ram enabled.
Bit 3: “1” is line frequency switch set to 50 Hz position. “0” is 60Hz position.
Bit 2: “1” is Autozero on, “O” is Autozero off.
Bit
Bit
"4" is Autorange on.
”4” is internal trigger, “O” is single trigger.
Byte 3: SRQ Mask
Bit “1” SRQ if power-on or Test/Reset set by rear panel switch #3.
Bit not used (always “O").
Bit “1” SRO if calibration procedure failed.
Bit “1” SRQ if keyboard SRQ is pressed.
Bit "1" SRQ if hardware error occurs.
Bit “1” SRQ if syntax error occurs.
Bit “1” SROQ if invalid syntax error occurs.
Bit 0: SRQ as each reading becomes available,
Byte 4: Error information
Bits 7,6,5,4 are not used (always ”0”).
Bit “1” AID error detected.
Bit “1” Microprocessor ROM error.
Bit 1: *1” Microprocessor RAM error.
Bit *1” Calibration RAM error, the calibration of the 3468A is suspect.
Byte 5: A/D Converter DAC Value
This byte will contain a value between O and 63 (decimal). This represents the set-
ting of the internal Digital to Analog converter (DAC), and is primarily for diagnostic
purposes.
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