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18-4
Measure Commands
APOWer
APOWer
Command :MEASure:APOWer <units> [,<source>]
Measures the average power. Sources are specified with the MEASure:SOURce command or
with the optional parameter following the APOWer command. The average optical power can
only be measured on an optical channel input. <units> is {WATT | DECibel} and <source> is
{CHANnel<N>}. For channels, this value is dependent on the type of module and its location
in the instrument. It will work only on optical channels.
Mode Eye or Oscilloscope modes
Query :MEASure:APOWer? <units> [,<source>]
The query returns the measured power of the specified source.
Returned Format [:MEASure:APOWer] <value>[,<result_state>]<NL>
<value> is the average power. If SENDvalid is ON, the <result_state> is returned with the
measurement result. Refer to Table 18-3 on page 18-30 for a list of the result states.
Example 10 OUTPUT 707;”:SYSTEM:HEADER OFF”
20 OUTPUT 707;”:MEASURE:APOWER? WATT”
CGRade:AMPLitude
Command :MEASure:CGRade:AMPLitude [{CHANnel<N> | FUNCtion<N> | CGMemory}]
Measures the eye amplitude of the displayed source. The eye amplitude is the difference
between the one level and the zero level.
Query :MEASure:CGRade:AMPLitude? [{CHANnel<N> | FUNCtion<N> | CGMemory}]
The query returns the eye amplitude of the eye signal of the displayed source.
Mode Eye mode only.
Returned Format [:MEASure:CGRade:AMPLitude] <value>[,<result_state>]<NL>
<value> is the eye amplitude. If SENDvalid is ON, the <result_state> is returned with the
measurement result. Refer to Table 18-3 on page 18-30 for a list of the result states.
Examples 10 OUTPUT 707;”:SYSTEM:HEADER OFF”
20 OUTPUT 707;”:MEASURE:CGRADE:AMPLITUDE?”
CGRade:BITRate
Command :MEASure:CGRade:BITRate [{CHANnel<N> | FUNCtion<N> | CGMemory}]
Measures the bit rate of the displayed signal. The bit rate is the number of bits per second. It
is measured as the inverse of the bit period. In NRZ eye mode, the bit period is the time inter-
val between two successive crossing points of an eye. In RZ eye mode, the bit period is the
time interval between the 50% falling (or rising) edges of 2 consecutive eyes.
Mode Eye mode only.
Query :MEASure:CGRade:BITRate? [{CHANnel<N> | FUNCtion<N> | CGMemory}]
The query returns the bit rate of the eye signal of the displayed source. Units are in bits/s.
Returned Format [:MEASure:CGRade:BITRate] <value>[,<result_state>]<NL>