644NN Set RF Attenuation
#644NN
sets the attenuation control for the output RF power where NN is a hexidecimal value
from 00 to 0A. Settings for attenuation are 1.0 dB increments over a range of 10 dB
of attenuation from the maximum power setting of 2 watts at 0dB attenuation to a
minimum power level of 200 milliwatts at 10-dB attenuation.
The Set RF Attenuation Command NN variables and corresponding attenuation settings
Table 21 RF Attenuation Command Variables
Variable (NN)
Attenuation Setting (dB)
00
0 (factory default)
01
1
02
2
03
3
04
4
05
5
06
6
07
7
08
8
09
9
0A
10
Reader response:
#Done
645NN Set SeGo Protocol Operating Range (Distance)
#645NN
sets the read range for SeGo protocol tags where NN is a hexadecimal value from 00
to 1F; the range increases with increasing NN value. The range can be adjusted for 32
discrete values where 00 is the shortest range and 1F is the longest range. The default
range value is 1F.
Reader response:
#Done
647XXX Select RF Operating Frequency
#647XXX
sets the reader RF from 860 to 930 MHz in 250-kHz steps, where
XXX
is a hexadecimal
value from 000 to 118. After the reader’s frequency is set, the value is stored in NVRAM.
This value is not altered by power-down.
If the NVRAM becomes corrupted, the correct operating frequency cannot be
guaranteed. In this circumstance, the RF section shuts down and the reader sends an
#Error06
message to the host. Until the frequency is reset using command
#647XXX
the unit displays the same error message each time it is powered up or if an attempt is
made to enable the RF by host or by external sensor.
Chapter 5 Commands
TransCore Proprietary
5–77
Содержание MPRX 10-7200-001
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