Synchronizing Multiple Is1001 Readers; Antenna Exciter Oscillator Synchronization Process - Biomark IS1001 Operation User's Manual

Installing and Configuring IS1001 Reader
The IS1001 reader has a 33 nF capacitor, C57, on the Exciter Board that is connected in
series with the IS1001 reader's bank of tuning capacitors. This capacitor should be used
when antenna inductance is between 130 uH and 180 uH, no additional capacitance is
connected in series at the antenna, and the IS1001 reader is installed next to or close to
the antenna (the antenna cable is less than 6 feet long).
In most other cases, this capacitor needs to be shorted out by installing jumper JP1 on
the Exciter Board and additional capacitance needs to be added (connected in series) at
the antenna to bring it within tuning range of the IS1001 reader and to reduce the voltage
across the antenna cable.
6. Make the communication line connection(s) to the IS1001 reader.
•
USB connection: A mini-USB port is available on all models and used to connect to a local
computer. See page 21 for details.
•
(Optional) Connect the Ethernet and/or Fiber Optic cables to their respective ports on the
Remote Communication Board. The Remote Communication Board is an optional
accessory. See pages 22 and 23 for details.
•
(Optional) Connect the DB-9 serial communication cable to the RS-232 port on the Data
Logger Board. The Data Logger Board is an optional accessory. See page Error!
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Synchronizing Multiple IS1001 Readers

If you are employing two or more IS1001 readers at your site and either of the following conditions
is true, you must synchronize the antenna exciter oscillators of the IS1001 readers in order to
avoid interference between their antennas.
•
HDX tag detection is enabled
•
The antennas are located in close proximity to one another (typically within 50' of each
other but the actual distance depends on the antennas' properties, orientation, etc.)
If the IS1001 readers antenna exciter oscillators are not synchronized:
•
When HDX tag detection is enabled, noise spikes from antennas switching on and off at
different times by different IS1001 readers can interrupt FDX-B detection on other
readers. In addition, if an IS1001 reader's exciter is activated, it can interfere with another
reader whose exciter is off while receiving an HDX tag response.
•
When antennas are located in close proximity, their fields can interact and cause elevated
noise levels and constant tuning adjustments, which in turn leads to decreased FDX-B
detection distance and efficiency.
Additionally, real-time clocks (date/time settings) of the IS1001 readers can be synchronized to
ensure consistent timing of events among readers (for instance, to determine direction of travel
of tags through multiple antennas). See page 13 for details.

Antenna Exciter Oscillator Synchronization Process

IS1001 antenna exciter oscillator synchronization should be configured using a 4-conductor, two
twisted pairs, 18-22 AWG wire, shielded cable.
Note: If using single twisted pair, 18-22 AWG wire, shielded cable, the cable shield drain wire
should be used as a signal reference conductor GND.
1. Use the conductors of one pair to connect the SS+ and SS- signals.
The IS1001 reader utilizes a network synchronization topology.
10 IS1001 Reader User Manual