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Installation and System Configuration
HDX Signal Receiver Optimization
To trace the progress of this procedure a real HDX tag must be used in conjunction with the
Detection Efficiency Test or with the audible sound of the buzzer.
1. Enable HDX detection by selecting Setup > Detection > HDX Detection = On.
2. Enable the Detection Efficiency Test by selecting Setup > Detection > Det. Efficiency Test
= On.
Return to main menu and note the test results.
3. Place the tag in the antenna field and slowly move it away until the detection rate is reduced
to approximately one or two reads per second.
4. Fine-tune the receiver by adjusting the HDX variable capacitor CV1 on the Mother Board to
improve detection rate (more reads per second).
Repeat steps 3 and 4 until no further improvement to the detection rate can be achieved.
Synchronizing Multiple Transceivers
If your location contains more than one antenna/transceiver combination, and if the antennas
are located in close proximity to one another, you will likely have to synchronize the transceivers
in order to avoid antenna phase and noise issues. This section explains why it is necessary to
synchronize the transceivers, shows how to cable the transceivers together, and describes how
to configure synchronization parameters on each transceiver.
Synchronization is done by synchronizing the Antenna Exciter clock of each transceiver through
hardwired twisted-pair interface. The transceivers are connected in a daisy chain configuration,
where the synchronization output (Sync Out Port) is connected to the synchronization input
(Sync In Port) of the next reader and synchronization input is connected to the output of the
previous reader. The first transceiver does not require the synchronization input as it is the
source of the synchronization signal. The last transceiver does not have anything connected to
its output. Synchronization input signal is used by each transceiver’s Antenna Exciter and also
is passed through to the synchronization output.
Local
oscillator
(134.2kHz)
Sync In Antenna Sync Out
Antenna
Local
oscillator
(134.2kHz)
Sync In Antenna Sync Out
Local
oscillator
(134.2kHz)
Sync In Antenna Sync Out
Antenna
To next reader
Antenna
Synchronization network
Use a 4-conductor, two twisted pairs, 18-22AWG wire, shielded cable:
•
•
18
Use the conductors of one pair to connect TX + to RX + and TX - to RX Use the conductors of the second pair as the signal reference connection
FS2020 User Manual