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參數(shù)資料
| 型號(hào)： | XIB-R |
| 廠商： | Digi International/Maxstream |
| 文件頁數(shù)： | 23/36頁 |
| 文件大?。?/td> | 826K |
| 描述： | BOARD INTERFACE RS232/485 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 附件類型： | 接口板 |
| 適用于相關(guān)產(chǎn)品： | XStream 和 Xcite 收音機(jī) |
| 其它名稱： | Q2231853 |
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FH (Force Wake-up Initializer) Command
<AT Command: Sleep (Low Power)> FH Command is used to force a Wake-up Initializer to be sent
on the next transmission. WR (Write) Command does not need to be issued with FH Command.
Use only with cyclic sleep modes active on remote modems.
AT Command: FH
FL (Software Flow Control) Parameter
<Non-AT Settable Parameter: Serial Interfacing>
FL Parameter is used to adjust serial flow control.
Hardware flow control is implemented with the
XCite Radio Modem as the CTS pin (which regu-
lates when serial data can be transferred to the
radio modem). FL Parameter can be used to allow
software flow control to also be enabled. The XON
character to use is 0x11 ("17" decimal). The XOFF
character to use is 0x13 ("19" decimal).
HP (Channel) Command
<AT Command: Networking> HP Command is
used to set the radio modem channel number. A
channel is one of three layers of addressing avail-
able to the XCite Radio Modem. In order for radio
modems to communicate with each other, the
modems must have the same channel number
since each channel uses a different hopping
sequence or single frequency. Different channels
can be used to prevent modems in one network
from listening to transmissions of another.
The XCite Radio Modem can operate both in Hop-
ping and Single Frequency Channel Modes.
Switching between Single Channel and Hopping
Modes can only be done only using the "Function
Set" dropdown list on the "Modem Configuration"
tab of the X-CTU Software
A "Hopping Channel" is a channel comprised of a
group of frequencies. When in Hopping Channel
Mode, the radio modem hops between the fre-
quencies them when transmitting data. This
option utilizes FHSS (Frequency Hopping Spread
Spectrum) technology. This option helps bolster
security in wireless data communications and also
makes the system less prone to interference.
The 25 center frequencies available in Single Fre-
quency Channel Mode are spaced 300 KHz apart.
Since each channel occupies a 500 KHz band-
width, adjacent channels therefore overlap. If
modems are used in the same vicinity but on dif-
ferent channels, the channels used should occupy
every other channel at a minimum separation. If
channels used on different radio modems can be
separated more they should be. This will provide
for more isolation and less interference.
Parameter Ranges: 0 - 1
Parameter
Configuration
0
No Software Flow
Control
1
Use Software Flow
Control
Default Parameter Value: 0
Number of bytes returned: 1
AT Command: ATHP
Parameter Range (Hopping Mode): 0 - 6
Parameter Range (Single Frequency Mode):
0 - 0x18 [refer to rows below]
Parameter
Frequency (MHz)
0x00
910.5
0x01
910.8
0x02
911.1
0x03
911.4
0x04
911.7
0x05
912.0
0x06
912.3
0x07
912.6
0x08
912.9
0x09
913.2
0x0A
913.5
0x0B
913.8
0x0C
914.1
0x0D
914.4
0x0E
914.7
0x0F
915.0
0x10
915.3
0x11
915.6
0x12
915.9
0x13
916.2
0x14
916.5
0x15
916.8
0x16
917.1
0x17
917.4
0x18
917.7
Default Parameter Value: 0
Number of bytes returned: 1
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