HP 3455A Operating And Service Manual page 33

Model 3455A
3-67. The following data message examples illustrate
oe how to read or program the front panel control of the
Table 3-5. BINARY PROGRAM Codes.
First BINARY PROGRAM Data Byte
Controls Affected: SCALE, % ERROR, OFF (MATH)
Program Code
ASCII | OECIMAL
To Program: | CHAR
OFF
% ERROR
SCALE
Second BINARY PROGRAM Data Byte
Controls Affected: AUTO CAL, AUTO RANGE, HIGH RESOLU-
TION, HOLD/MANUAL, EXTERNAL, INTERNAL
To Program:
HIGH ASCII
RESOLUTION TRIGGER CHAR
PROGRAM CODE
DECIMAL
cOOE
Hold/Manuat
External
Internal
59
61
62
Hold/Manual
External
Internal
51
$3
54
Hotd/Manual
External
taternal
Hold/Manual
External
Internal
@ tt
Manual/Hold
External
Internad
den
Manual/Hol¢
External
Internal
cu
43
45
46
35
37
38
gu
93
94
83
85
86
Manual/Hold
External
Internat
Manual/Hold
External
laternal anmolzzal<
Third BINARY PROGRAM Data Byte
Controls Affected: 10 K, 1 K, 100, 10,1,.1 (RANGE)
Program Code
ASCII | DECIMAL
To Program: | CHAR
Fourth BINARY PROGRAM Data Byte
Program Code
DECIMAL
To Program: CODE
TEST
4 WIRE kn
2 WIRE kn
FAST ACV
ACV
Dev
75
77
we
Section IL
3455A. To read control status:
wrt 722, "B"
Address the Set the 3455A to the
3455A to BINARY PROGRAM
"disten" mode
Since normally four data bytes are used in Binary pro-
gramming, the 3455A may indicate an SRQ condition
when only a ''B'' is sent.
ted 722
Address the 3455A
to "talk"
The 3455A, after receiving the "talk" command, will out-
put the front panel control status codes (4 bytes). As an
example, if the front panel controls were in the "turn-on"
state, the 3455A would output the following codes:
> '
ON
MATH OFF | | | DC Volts FUNCTION
AUTO CAL ON
AUTO RANGE ON
HIGH RESOLUTION OFF 1 Volt RANGE ;
INTERNAL TRIGGER (depends on input applied)
To program front panel controls:
wit722, "B ikK/="
Address the |
3455A to
"disten"
Desired program
codes (see Table 3-5)
Set 3455A to
BINARY PROGRAM
mode
3-68. Measurement Data. Measurement data is output by
the 3455A in the following general format:
OUTPUT FORMAT: + D.DDDDDDE + DD CRLF
Polarity of measurement |
(does not apply to ACV
or OHM measurements)
Terminates
message
Measurement reading
expressed in scientific
notation
This format is printed in the lower left corner of the
3455A front panel for convenience. The following is an
example of a data message output by the 3455A:
3-11