Kwikbit Inc. PTP55DP Manuale Utente
M4-2000
User Guide
Kwikbit M4-2000 User Guide
Confidential & Proprietary
- 17 -
4.5.5 LED Status Indicators
The M4-2000 unit has two external indicator lights adjacent to GigE port three that will be
illuminated in various patterns to show the internal operating state of the device. The Power (PWR)
illuminated in various patterns to show the internal operating state of the device. The Power (PWR)
indicator light is green in color and when illuminated indicates that the unit is receiving power. The
Link (LNK) indicator light will illuminate in either green or red per the following table:
Link (LNK) indicator light will illuminate in either green or red per the following table:
State
PWR LED
Green
LNK LED
Green/
Red
1
Power On
o
o
2
Boot sequence in progress
o
o
3
Boot sequence complete, cores are started,
system is running
system is running
o
-
4
Primary: broadcasting
Secondary: seek mode (i.e. scanning)
Secondary: seek mode (i.e. scanning)
o
*
5
RF and data link established
o
o
8
Fault
o
*
-
= LED off
*
= Blinking LED
o
= LED continuously lit
Table 3.4.5 – M4-2000 LED Status Indicators
4.6 Wireless Operation
The M4-2000 point-to-point wireless communication system consists of a primary unit and a
secondary unit. They operate in a master / slave relationship, with the primary unit responsible for
establishing Time Division Duplex (TDD) link timing while the secondary unit locks onto the
establishing Time Division Duplex (TDD) link timing while the secondary unit locks onto the
downlink in order to synchronize the uplink properly.
The TDD frame duration is 1 ms, divided into separate uplink and downlink subframes. When the
The TDD frame duration is 1 ms, divided into separate uplink and downlink subframes. When the
link starts, the ratio between uplink and and downlink is 50-50; once communication is established
the ratio will change to either a configured fixed setting or else dynamically adapt to optimize for
the ratio will change to either a configured fixed setting or else dynamically adapt to optimize for
the throughput observed in each direction.
The TDD ratio ranges from 30% downlink to 70% downlink, in increments of 1%. The overall 1 ms
The TDD ratio ranges from 30% downlink to 70% downlink, in increments of 1%. The overall 1 ms
TDD frame size results in low data transfer latency.
The system can operate over channel bandwidths of 10, 20 or 40MHz.
The system can operate over channel bandwidths of 10, 20 or 40MHz.
4.6.1 Carrier Aggregation
The M4-2000 system features carrier aggregation where two radios combine seamlessly into a
single, large data pipe. The radios can operate in the same or different bands, licensed or
single, large data pipe. The radios can operate in the same or different bands, licensed or
unlicensed, but are required to use the same channel bandwidth and TDD ratio.
Each radio has separately configured transmit and receive frequencies. Normal configuration is a
Each radio has separately configured transmit and receive frequencies. Normal configuration is a
single frequency for radio 1, and a separate frequency for radio 2.