Troubleshooting the Installation
6-15
Table 6-8 Spotty Pattern or Low Handshake Counts
Indication Action
Spotty
pattern or
low
handshake
counts
This is a two-person operation. Person 1 checks commands and
responses using the host software. Person 2 uses a hydraulic lift to
check the physical connections.
The problems of spotty pattern or low handshake counts usually
have the same cause: either a defective RF coaxial cable between
the RF module and an antenna or a defective antenna. This
procedure checks both cables and antennas.
Warning
Switch off RF power before working on antennas.
Caution
Only switch on RF power when the RF module transmit port is
connected to an antenna or other load device.
Troubleshooting at the Lane
1. Person 1: Disconnect the data cable from the reader logic card
in the lane controller.
2. Connect the data cable to the extension data cable, then
connect the extension data cable to the reader logic card in the
PC.
3. Person 2: Open the RF module cover and measure the voltage
at Terminals A and C. The voltage should be 19 to 28 VAC or
16 to 28 VDC depending on your requirements.
Using Engineering Host Software Diagnostics
1. Person 1: Start the PC, then double-click the Host icon to start
the host software. Upon startup, the Power On Status
Information screen appears. Click Cancel to clear this screen.
2. From the Reader menu, select RF Attenuation. When the RF
Attenuation Parameters screen appears, set the downlink and
uplink attenuation to 0, then click Apply.
3. From the Options menu, select Diagnostics, then Diagnostics
Control.
4. Person 2: Disconnect the transmit antenna cable from the RF
module.
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