Agilent Technologies B1500A Service Manual Page 62

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1-44 Agilent B1500A/B1505A Programming Guide, Edition 11
Programming Basics
Data Output Format
D (CMU data) Data count. This value is expressed in 17-bit binary data. The measurement data and
the output data can be calculated by the following formula.
Resistance or reactance = Count × Range / 2
12
Conductance or susceptance = Count / (2
12
× Range)
OSC level monitor value = Count × Range / 50000
DC bias monitor value = Count × Range / 50000
DC bias output value = Count / 500
Output signal frequency = Count × Range / 50000
where, Count is the D value, and Range is the measurement range or output range
given by C.
If the top bit of D is 0, Count is positive and equal to the value given by the
following 16 bits. If the top bit of D is 1, Count is negative. Calculate Count by
subtracting 65536 (10000000000000000 in binary) from the value given by the
following 16 bits.
Example:
If the output binary data is:
10001000000011111010000000001000
then,
Type: Measurement data (A=1)
Parameter: Resistance (or reactance) (B=0)
Range: 10 kΩ =10^4 (C=00100 in binary, C=4 in decimal)
Count: 4000 (D=00000111110100000)
Status: Normal condition (E=000)
Channel: 8 (F=01000)
Measurement data = 4000 × 10000 / 2
12
= 9.76 kΩ
NOTE For the resistance, reactance, conductance, or susceptance data, Range value can be
expressed by the following formula.
Range = 10^C
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