Measurement Computing Analyzer488 User Manual

Page 103

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Section 4

Serial Controller

4.9

Numeric parameters (those that are given as numbers) are decimal

unless preceded by &H in which case they are considered to be
hexadecimal or by % in which case they are considered to be binary. Thus
100 is decimal 100, &H64 is hexadecimal 64 (decimal 100), %00000100
is binary (decimal 4), &HFF is decimal 255, and OFF is invalid because F
is not a valid decimal digit. The only exception to the rule is the IEEE 488
bus addresses, both primary and secondary, must be specified as two digit
decimal numbers. Hexadecimal bus address are not allowed. When
specifying binary numbers, eight digits must follow the % sign.

Several of the commands require additional or optional parameters

and keywords. These are further described with each command, but
discussion of the more common ones follow. If no optional parameters
are specified with a command that requires them, the command will be
treated as invalid.

4.11.2.1 Bus Addressing

pri-addr

A two digit primary device IEEE 488 bus address
in the range of 00 to 30.

sec-addr

An optional two digit secondary IEEE 488 bus
device address in the range of 00 to 31.

addr

An IEEE 488 bus address. A numeric primary
address optionally followed by a secondary
address. Thus, addr is of the form... {pri-
addr[sec-addr]}
where pri-addr

is a two digit primary IEEE

488 bus device address from 00 through 30 and
sec-addr

is a two digit secondary IEEE 488 bus

device address from 00 through 31. Numeric
addresses must be given as two digit decimal
numbers, e.g. 05 for address 5, and 1601 for
primary address 16, secondary address 1

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