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N 4
Appr
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l Comma
nds
Electromagnetic Inductive RFID System
User's Manual
SECTION 4
Commands
Appraisal Commands
If errors are frequent during communications with Tags, one of the causes may be ambient noise. The
appraisal commands are used to investigate whether or not noise is the cause of errors. It can also be used to
check noise generation at installation sites before installing V670-series Tags or Antennas and Controllers.
Even if read results are normal, reception waveforms may exhibit interference. These commands can be used
to check for noise at the waveform level to provide more detailed information on the actual status of the
waveforms.
Noise Measurement Command (NS)
Investigates the noise level when commands are received.
Example: Investigating Ambient Noise Level
Send data:
NS
*
[CR]
Receive data: NS00000A
*
[CR]
Noise evaluation result
The noise level is evaluated as the maximum absolute value in the measured data.
“A”: Low noise level (0.0 V to 2.0 V); indicator will light green.
“B”: High noise level (2.0 V to 3.3 V); indicator will flash red.
2
2
㧖
CR
Command
code "NS"
Command
2
2
1
1
1
2
㧖
CR
Command
code "NS"
Retry
flag
Status
flag
End code
Result of
noise level
measure-
ment
Response
Summary of Contents for V670-CF01
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