Model 8642A/B
Appendix E
Appendix E: INDIVIDUAL INSTRUMENT IDENTIFICATION
The intrument's model number, serial number, and the options installed in the instrument can be
displayed on the front panel or read via HP-IB.
Service Special Function 40 accesses the model number of the instrument, Service Special
Function 41 accesses the serial number, and Service Special Function 42 lists the options installed
in the instrument. Note that accessing service special functions is different than accessing the
user special functions discussed previously in this manual.
To manually select user special functions, you key in SPCL ( I SHIFT J [ - I ) and then the
special function number. To manually select service special functions, you need to follow two
steps:
(For HP-IB, use the HP-IB example below.)
1) First select user Special Function 3, Service Mode, with keystrokes SPCL ( I SHIFT I I - 1 )
CXI-
2) After you enter the service mode, you can select the service special function number
followed by the
1
HZ UV ) terminator. (The instrument only knows you have selected a
special function when you key in the I HZ UV I terminator.)
To list:
Model number of the instrument: SPCL (I SHIFT I m ) GD CXI GD
1
HZ UV 1
Serial number of the instrument: SPCL (I SHIFT 1 m ) GD GD GD I HZ UV 1
Options installed in the instrument: SPCL (I SHIFT 1 GD ) GD CXI GD
1
HZ UV I
HP-IB Example (in BASIC)
The listing below is an example of reading the list of installed options via HP-IB using Output
Display (which is described in Data Output, page 3-21). Note that the terminator for a service
special function is "EN". When in the service special function mode, "EN" is the programming
equivalent of manually pressing the Hz key.
10 DIMA$[74]
20 OUTPUT 719;"SP342EN"
30 ENTER
719;
A $
40 PRINT A$
50 END
Comment
Some 8642A instruments will display an Option A02. This is a code for the internal firmware
and is not an option that can be ordered.
3-208.1
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