User's Manual

TUNING PROCEDURES & TIPS

There are two main potential problems that will affect FastPad’s functioning

and performance.

Problem #1

The deactivator’s detection range does not match the deactivation range.

If the detection range is too short (low sensitivity for the receiver), it will

decrease the system’s deactivation distance. But if the detection range is

bigger than the deactivation range, it will cause false deactivation.

Normally the FastPad deactivates labels 10cm above the antenna surface in

all label orientations, so please tune Minimum Signal Adjustment to set the

deactivator to the appropriate detection range. This adjustment is described

under the heading “Key ID H” on page 19.

Problem #2

The deactivator exhibits false alarms (or causes other systems to do so)

without tags or labels in the detection zone.

Usually interference is caused by a phase difference between different AM

products at different locations. In this case, try to hunt on an appropriate B

value (sync value), eliminating cross talk with nearby AM systems.

Exercise patience in trying every 5 increments of the B value, checking the

noise value after confirmation. If other AM systems burst transmissions come

into the FastPad tag signal window, you will get a very high noise value (e.g.

6-8). Continue increasing the B value until you get a relatively small noise

value (e.g. 1-3) and continue to monitor it until you have confirmed that other

AM systems can successfully function without false alarms.

FastPad has a totally adjustable sync value from 0 - 99, each step equaling

34µs, with a total adjustable Tx delay from 0 – 3.366ms. (Refer to page 16,

under the heading “Key ID B Sync Adjustment”).