P400寄存器翻译

S119 Quick Enter to Command Mode

If this register is set to 1, a delay of 5 seconds is introduced at power-up before the modem will go into Data Mode. If, during these 5 seconds, the user enters ?mhx‘ the modem will instead go into Command Mode and reply with ?OK‘. The terminal baud rate must be set to 9600bps. If an incorrect character is entered, the modem will immediately go into Data mode.

The default setting is 0: The modem will promptly go into Data Mode upon power-up.

如果这个寄存器设置为1时,上电后延时5秒调制解调器将进入数据模式。在这5秒,如果用户输入的mhx调制解调器将进入命令模式并返回―OK‖。终端波特率必须设置为9600bps。如果输入不正确的字符,将立即进入数据模式。

默认设置为0:调制解调器在上电时将立即进入数据模式。

S123 RSSI from Uplink (dBm)

This register displays the average signal strength received over the previous 8 hop intervals from a Master/Repeater. The value in this register is also reflected in status lines RSSI1, 2, and 3, which connect to the modem‘s RSSI LEDs.

这个寄存器显示在过去8跳间隔里主站/中继里接收到的平均信号强度。这个寄存器中的值也反映在连接到调制解调器的RSSI发光二极管，RSSI1,2,3。

S124 RSSI from Downlink (dBm)

这个寄存器显示在过去8跳间隔里从站/中继里接收到的平均信号强度。这个寄存器中的值也反映在连接到调制解调器的RSSI发光二极管，RSSI1,2,3。

S125 (NB Modems) Occupied Bandwidth

This register sets the occupied bandwidth for the wireless link. 这个寄存器设置无线连接占用带宽。

S127 (NB Modems) Modulation

This register sets the modulation scheme for the modem. Available Link Rate and Channel Bandwidth vary based on the modulation scheme.

这个寄存器设置调制解调器的调制方案。可用的链接率和根据调制方案的不同信道带宽

S128 Modem Type

The P400 can operate as a 400 MHz Licensed, Narrowband Modem, as a 900 MHz FHSS Modem or as a 400 MHz Frequency Hopping Modem. The Modem Type defines the basic operating mode of the entire modem module. This register should be set before any other parameters are configured.

P400可以作为400 MHz窄带调制解调器,900 MHz FHSS调制解调器或400 MHz跳频调制解调器。模块类型定义了整个调制解调器模块的基本操作模式。这个寄存器应该在任何其他寄存器配置之前设置

S129 (NB - 3AS Only) Full CRC-16 Use。

Full CRC-16 Check (for 3AS Protocol). 0 - Disable, 1 – Enable 全CRC-16检查(仅3AS协议适用)。0 -禁用,1 -启用

S130 No Sync Intake没有同步摄入

Defines if the modem will accept data if the remote has become unsynchronized from the Master. If set to 0, this function will be disabled and any data received will be ignored. If set to 1, the modem will accept data and buffer it until the unit is synchronized.

定义如果远端与主站不同步调制解调器是否接收数据。如果设置为0,这个功能将被禁用,任何收到的数据将被忽略。如果设置为1,调制解调器将接收数据并存入缓冲区,直到单元同步。

S131 (NB Modems) Main Tx Frequency

This register sets the operating Tx frequency for the wireless link. Select the desired channel from the frequency table. The available channels/frequencies are entered into the frequency table by Authorized Dealers only. Use the ―ATP0?‖ command to view the available channels.

这个寄存器设置无线连接的发送频率。从频率表中选择所需的通道。仅由授权经销商进入频率表获取可用的通道/频率。使用―ATP0?‖命令来查看可用的频道。

S132 (NB Modems) Main Rx Frequency

This register sets the operating Rx frequency for the wireless link Select the desired channel from the frequency table. The available channels/frequencies are entered into the frequency table by Authorized Dealers only. Use the ―ATP0?‖ command to view the available channels.

这个寄存器设置无线连接的接收频率。从频率表中选择所需的通道。仅由授权经销商进入频率表获取可用的通道/频率。使用―ATP0‖命令来查看可用的频道。

S133 (FH Modems) Network Type

This register defines the type of network being deployed. This register must be set to the same value on every unit in the system.

Point to Multipoint - The Master broadcasts data to all units, and all remote units send data back to the Master.

Point to Point - Point to point traffic between a Master and a Slave (with 0 or more Repeaters in between).

Peer-to-Peer involves either communication between 2 (typically remote) units (P2P) or between all units (Everyone-2-Everyone - E2E).

这个寄存器定义了网络类型。在系统中的每个单元中的这个寄存器必须设置为相同的值。 点对多点-主站数据广播到所有从站,所有远端从站发送数据返回给主站。 点对点——主站和从站两点之间点对点(不含或者有多个中继器)。

对等通信包括2(通常是远程)之间的通信单元(P2P)或所有单元(Everyone-2-Everyone - E2E)之间。

S136 (NB Modems - 3AS) TX_RX Priority

Tx_RX Priority (for 3AS Protocol)Tx_RX优先级(3AS协议)

S137 (NB Modems - Transparent Mode) CSMA Time Slot Size

Size of Time Slot in bytes (For Transparent Protocol, used in CSMA mode with Repeaters). Range from 0 to 255. Default - 2.

时间槽字节大小的(对于透传协议，用在带中继的CSMA模式)。从0到255不等。默认 2。

S138 (NB Modems - Transparent Mode) After Tx Delay

After Tx Delay, in 100us (For Transparent Protocol, used in CSMA mode with Repeaters). Range from 0 to 65535. Default - 0.

Tx延时之后,在100us以内(对于透传协议，用在CSMA带中继器模式)。从0到65535不等。默认- 0。

S139 (900 MHz FH Modem) Compatible_921 at 345

If this register is set the P400 if configured as a 900 MHz FHSS will be compatible with e MHX921 operating at a link rate of 345kbps.

如果P400配置为900 MHz FHSS将兼容按照345 kbps链接速度的MHX921操作模式。

S140 (FH Modems) Destination Address

As the name implies, this register specifies the ultimate destination for a modem‘s data. Different network topologies dictate the configuration of S140.

In PMP and PP modes - the range is 1 to 65535, where 65535 is broadcast: PMP - Master S140=65535, Remote S140=1

PTP - Master S140=UA of Remote, Remote S140=1 (Master) P2P - Master S140=65535, S140 of each (of 2 / pair) Remote modem is the UA of the other

E2E - S140 of all modems=65535 (broadcast)

顾名思义,这个寄存器指定调制解调器的数据的最终目的地。 不同的网络拓扑结构决定S140的配置值。

在PMP和PP模式——范围是1到65535,65535表示数据目的地是网络中任何一个站点: PMP——主站的目的地址S140 = 65535,远端目的地址S140 = 1

PTP-主站目的地址S140 =远端的 UA（单元地址）、远端S140 = 1(主站)

P2P -主站目的地址S140 = 65535,从站目的地址S140成对出现，互为对方的单元地址 E2E中所有的调制解调器的目的地址S140 = 65535(广播)

S141 Repeaters Y/N

This register informs, and only applies to the Master, as to the presence of any Repeater(s) in the network. With one or more Repeaters in the system, a networks throughput is divided in half.

这个寄存器只适用于主站，表明存在网络中的任何中继器(s)。由于系统中存在一个或多个中继,网络吞吐量分为两半。

S142 Serial Channel Mode串行通道模式

This register defines the physical serial interface which will be used for data communications. 这个寄存器定义了将用于数据通信的物理串行接口。

S150 (FH Modems) Sync Mode

This setting applies only to the Master modem. S150 dictates which sync mode the Master will use when it initially goes online. Quick sync mode results in the Master hopping very quickly, which will enable a downstream unit to become synchronized faster.

A setting of 1 applies only in a point-to-point (PTP) configuration: the Master will stay in quick sync mode until such time as it receives an acknowledgement from its associated Slave, it will then remain hopping quickly for the number of hop intervals (8-255) defined by S152 (Fast Sync Hold on Ack), after which time

it will go into normal sync mode.

A value of 2 results in the Master going into quick sync mode when it initially comes online and then remaining in that mode for the duration specified in S151 (fast sync timeout) and then return to normal 此设置仅适用于主站调制解调器。S150描述了调制解调器刚上线时采用的同步模式。快速同步模式下主站跳频很快,这将使远端从站更快的同步。

设置1只适用于在点对点配置:主站会保持在快速同步模式,直到它收到一个来自从站的确认。然后它将保持快速跳跃间隔(8 - 255)，这个值由S152(快速抓住Ack同步)决定,之后将进入普通同步模式。

值为2描述了调制解调器刚上线时采用快速同步模式，然后保持在快速同步模式，时间是S151指定的(快速同步超时),然后恢复正常模式

S151 (FH Modems) Fast Sync Timeout

This register settings applies only to a Master modem. Effective only when S150=2.

Defines how long, in milliseconds, a Master modem will stay in fast sync mode after it initially goes online. 这个寄存器设置仅适用于主站调制解调器。只有当S150=2时这个寄存器才有效。

定义了多长时间（以毫秒为单位）一个主调制解调器在刚上线之后保持在快速同步模式的时间。

S153 Address Tag

If enabled, the modem prepends 4 extra bytes to the data: first byte = 0x00, second = 0xFF, third = source unit address (high byte), fourth = source unit address (low byte).

如果启用,将给调制解调器添加4个额外字节:第一个字节=0x00,第二个字节=0xff第三个字节=源单位地址(高字节),第四个字节=源单位地址(低字节)。

S158 FEC (Forward Error Correction) Mode

A number of FEC schemes are available with different coding rates.

FEC consumes significant bandwidth: depending on which coding rate is chosen, a number of coding bits are transmitted along with the ?data‘ bits. In ?noisy‘ or long-range communications environments, FEC may effectively increase throughput by decreasing the amount of packet retransmissions which would otherwise be required.

Communications range may also be extended with the use of FEC: at a certain distance where data would otherwise be unacceptably corrupted, employing FEC may be all that is required to maintain the integrity of that data at that distance.

许多配置不同的编码率的前向纠错方案都可以选用。

前向纠错需要占用大量的带宽:这取决于编码速率选择,大量的编码比特和数据比特一起传输。在―嘈杂‖或远程通信环境中,前向差错检验通过减少数据包重发能有效提高吞吐量。

通过使用前向差错校验也可以延长通信距离，否则会因为数据干扰而接收不到数据。采用前向差错校验可以保证在一定距离内的数据完整性。

Types of FEC available within the P400:

Hamming (7,4) : Information rate 0.5, corrects 1 out of 7 bits Hamming (15,11) : Information rate 0.66, corrects 1 out of 15 bits Hamming (31,24) : Information rate 0.75, corrects 1 out of 31 bits