ThingMagic M5e-Compact - Manual (Page 183)

Get Application Commands
Command Set 183
Available Statistics
The response to a Get Reader Statistics command contains the following information:
Statistics Flag Bit Statistic
Bit 0 (0x01) RF On Time (ms) - Indicates the aggregate time the transmitter has been on, in milli-
seconds, since the counter was last reset.
Returned value contains N bytes (N/2 on the M5e-Compact), Where N = the number
of valid logical antennas based on the
Antenna Ports configuration X 4 bytes for
each antenna.
Note: Clock rolls over every 2
32
milliseconds and must be taken into account by
user application.
Bit 1 (0x02) Noise Floor - When requested the reader will listen on each available logical
antenna and report the noise floor in units equivalent to the units returned for
Tag
Read Meta Data RSSI value.
Returned value contains N bytes (N/2 on the M5e-Compact), Where N = the number
of valid logical antennas based on the
Antenna Ports configuration x 1 byte for each
antenna, in ascending antenna order.
Note: A single RF operation (read, etc.) must be performed before this operation
can return valid data.
Bit 3 (0x08) Noise Floor with TX On - When requested the reader will transmit a CW signal on
each available logical antenna and report the noise floor detected in units equivalent
to the units returned for
Tag Read Meta Data RSSI value.
Returned value contains N bytes (N/2 on the M5e-Compact), Where N = the number
of valid logical antennas based on the
Antenna Ports configuration x 1 byte for each
antenna, in ascending antenna order.
Note: Multiple statistics can be requested by a single command by performing a binary OR (setting each
desired Statistics Flag bit to 1) on the desired flags and sending the result as the Statistics Flag byte.