Anritsu MS9710C User Manual

B-1
Appendix B
Appendix
This appendix explains formats of the binary data transferred in response to query commands DBA? and DBB?.
● Log scale
Data structure
Transfer order
Numeric
representation
Unit
16 bits/data
High-order byte → Low-order byte
Signed 16 bit value (0.01 dBm = 1)
Measured value = Input value × 0.01 dBm
dBm
Example: When 2 byte input values are 233 and 162
Hexadecimal notation: E9A2
Decimal notation: –5726
Measured value: –5726 × 0.01 dBm = –57.26 dBm
● Linear scale
Data structure
Transfer order
Numeric
representation
Unit m
32 bits/data (exponent part, 16 bits; mantissa part, 16 bits)
High-order byte of exponent part → Low-order byte of exponent part →
High-order byte of mantissa part → Low-order byte of mantissa part
Mantissa part: Value (0.1000 to 1.0000) × 10000
Exponent part: Signed 16 bit value (+3 to –8)
Measured value = (Mantissa part value × 0.0001) E + (Exponent part value) mW
mW
Example: When 4-byte input values are 255, 247, 39, and 16
Exponent part value: –9
Mantissa part value: 10000
Measured value: (10000 × 0.0001)E + (–9) mW = 1E – 9 mW
Appendix B Binary Data Transfer Formats

Anritsu MS9710C Specifications

General

Brand	Anritsu
Model	MS9710C
Category	Measuring Instruments
Language	English