Section 9 Details on Device Messages
9-6
9.3 ANAR [Spectrum Analysis Result]
■ Function
Reads the result of the analysis made with ANA command.
Response data is the result of the last analysis made by executing an AND command.
There are four types of response data formats:
Header Program Query Response
ANAR None ANAR ? λ c , hw : Type 1
λ c , hw, n : Type 2
∆ λ , ∆ l : Type 3
p, λ c : Type 4
■ Response data
Type 1: Envelope, Threshold, RMS
Type 2: ndB - Loss
Type 3: SMSR
Type 4: Spectrum - Power
• Value of λ c
λ c is the center wavelength or frequency obtained through an analysis. The unit
is nm or THz, and a value is output down to the fourth decimal place.
The value is tail-zero-suppressed.
If analysis is impossible, –1 is output.
• Value of hw
hw is the spectrum width obtained through an analysis. The unit is always nm,
and a value is output down to the third decimal place.
The value is tail-zero-suppressed.
If analysis is impossible, –1 is output.
• Value of n
n is the number of axis modes obtained through the analysis carried out using an
ndB-Loss method. A positive integer is output.
If analysis is impossible, –1 is output.
• Value of ∆ λ
∆ λ is the difference in waveform length between the main peak and the side
mode obtained through the SMSR analysis. The unit is always nm, and a value is
output down to the third decimal place.
The value is tail-zero-suppressed.
If analysis is impossible, –1 is output.
• Value of ∆ l
∆ l is the difference in level between the main peak and the side mode obtained
through the SMSR analysis. The unit is dB, and a value is output down to the
second decimal place.
If analysis is impossible, –999.99 is output.
• Value of p
p is a power integration result obtained through the spectrum power analysis. The
unit is always dBm, and a value is output down to the second decimal place.
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