User Manual
9
limited range.
The default RF spectrum norm is FCC (902MHz-928MHz).
Method 2:
Set the RF spectrum manually.
The user customizes the spectrum through three parameters: the starting frequency (unit is KHz, such as 860MHz, you
need to enter 860,000), the interval between frequencies (the unit is KHz, the maximum frequency interval is
2500KHz, if you enter 2.5MHz, you need to enter 2500), the number of frequency points (Select the number of
frequency points according to the input start frequency and frequency interval. The recommended maximum operating
frequency range is 860MHz ~ 960MHz. When the number of frequency points is 1, work at fixed frequency according
to the start frequency).
For example, if you need to customize the working frequency range from 860MHz to 960MHz, you can get the
starting frequency of 860MHz, the frequency interval is 2.5MHz, and 40 frequency points are needed. Then enter the
corresponding parameters as shown in the figure below. After this value is set, it will be automatically saved in the
reader and will not be lost after the reader is powered off.
2.2.3 Antenna Connection Detector
The function of antenna connection detection is to check whether the antenna is connected to the port before reading
and writing tags. If there is no connection, notify the user that the antenna is not connected.
Before use, the user needs to turn on this function and view it through the interface shown in the figure below. The
interface for setting this function is shown in the figure below:
The sensitivity of antenna detection is set by the user. The sensitivity of antenna detection is the return loss value
(Return Loss) of the antenna port, and the unit is dB. The larger the value, the better the impedance matching
requirement between the antenna and the antenna port. Generally speaking, for antennas with an antenna port standing
wave VSWR ≤ 1.3, this threshold can be set to 3 to 6 dB. For near-field antennas, ceramic antennas or handheld
terminal antennas with VSWR ≥ 1.3, the sensitivity can be lowered even lower. If the return loss threshold is set to 0,
it means that this function is turned off, and the antenna connection status will not be detected before reading and
writing tags.
If antenna is not connected, Reader will stop to operate tags with the following screen display:
