TransCore encompass 4, Руководство пользователя

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Chapter 7 Commands
TransCore Proprietary
7–121
Table 33 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 eGo and eGo Plus Operating Range (Distance)
Command
#645NN
sets the read range for eGo and eGo Plus 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
646NN Set IAG RF Attenuation
Command #646NN sets the IAG attenuation control for the output RF power where NN is a hexidecimal
value from 00 to 0F. Setting 00 (0 dB) is the maximum power setting and 0F (15 dB) is the minimum power
setting.
The default attenuation value is 04.
647NNN Select RF Operating Frequency
Command
#647NNN
sets the reader RF from 860 to 930 MHz in 250-kHz steps, where NNN is a
hexadecimal value from 000 to 118. After the reader’s frequency is set, the value is stored in non-volatile
RAM (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 Error 06 message to the host. Until