Solartron 1250 - Dump Mode Format

The 1251 Multichannel Analyzer System 1250 Frequency Response Analyzer
16-10 AMK/1250/1
16.7.9 DUMP MODE FORMAT
DUMP mode, in which results have been compressed into a binary form to occupy fewer
bytes, is the fastest way to output data from a 1251 Unit.
Each measurement parameter consists of 4 bytes, compared to the 11 needed for ASCII
format. The error code format is, like the ASCII format, a single character which in
DUMP mode takes the value 1 to signify the overload condition, and 0 otherwise.
Chapter 13, Section 12.5, explains in detail how to decode the four parameter bytes
from binary into decimal notation. This decoding yields seven significant figures for
each parameter compared to the five given by the ASCII format; so DUMP mode is also
more precise.
The complete eight-channel data block output by the 1251 in DUMP mode takes the
form:
f f f f a
1
a
1
a
1
a
1
b
1
b
1
b
1
b
1
e
1
a
2
a
2
a
2
a
2
b
2
b
2
b
2
b
2
e
2
.............. a
8
a
8
a
8
a
8
b
8
b
8
b
8
b
8
e
8
using the usual notation.
Output Separators and Output Terminators are not sent, although EOI (End or Identify)
is automatically asserted simultaneously with the last byte if the appropriate Output
Terminator has been selected (Chapter 12, Section 1). Appropriate Output Terminators
are either cr+EOI, or crlf+EOI, chosen during the setting up of the 1250 GPIB
CONFIGURE Menu (Section 7.3).