NOTICE TO PERSONS RECEIVING THIS DRAWING
AND/OR TECHNICAL INFORMATION:
Title:
TUNING PROCEDURE
TR4022
Checkp oint Systems claims proprietary rights to t he material disclosed hereon.
This drawing and/or technical information is issued in confidence for engineering
information only and may not be reproduced or used to manufacture anything
shown or referred to hereon without direct written permission from Checkpoint
Systems to the user. This drawing and/or technical information is the property
of Checkpoint Systems and is loaned for mutual assistance, to be returned
when it s p urp ose has been served.
THIS DRAWING AND/OR TECHNICAL INFORMATION IS THE
PROPERTY OF CHECKPOINT SYSTEMS, INC.
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 2
1.0I N TRODUCTION
This document describes the procedures required to properly tune a Strata System with the
TR4022 board. Many of the adjustments for the Strata are pre-tuned during the manufacturing
test process therefore adjustments required in the field have been minimized.
Adjustments such as center frequency and sweep are preset for 8.2 Mhz operation. If the system
is required to detect a different frequency tag the sweep range will need to be readjusted by the
installer.
Once properly configured, if poor performance results, the CSE should direct their efforts toward
finding the source of the interference in the environment. Several test signals are provided by the
TR4022 board, which may be viewed on an oscilloscope. These signals allow the CSE to identify
and measure ambient noise levels, resonances and other sources of environmental interference.
The DSP (digital signal processor) system automatically subtracts stationary resonances seen by
the antennas. The system offers flexibility to adjust for these circumstances. However, the
solution for environmental problems, is to determine the environmental problems and resolve
them. The options for adjusting to environmental problems are performed both in the analog and
digital realm by the technician. The analog solutions are reducing power on the transmit antennas
(2-loop and/or 3-loop), reduce the baseband gain, and adjust the sweep. In the digital toolbox
there are four user selectable filter parameters. These tools should be used only after the CSE has
attempted to correct the environment.
TUNING PROCEDURE TR4022
The Strata system is powered by a +24Vdc power supply, P/N 121878. This power supply can
power up to a maximum of three antennas.
2.0SYSTEM DESCRIPTION
The Strata system is a transceiver design using both a 3-loop, 2-loop, and a 1-loop antenna design.
The Strata alternates between using the 2-loop antenna and the 3-loop antenna. The 1-loop
antenna is used as a shield that is tied to ground. This technique provides the system with
different views of the detection field allowing the system to improve detection by minimizing the
holes typically found at the crossbars of typical swept antennas.
During an antenna’s cycle, the system performs two “blasts” which are called a “bin”. There are
sixteen bins per frame. A bin consists of two “noise” cycles and two blast cycles, a blast is a
transmit cycle and then a receive cycle. During the noise cycle, the system is not transmitting,
only receiving ambient noise. This allows the system to establish the baseline noise level of the
environment for later comparison. The system then transmits or “pulses” the field and then
receives or “listens” for an echo of a tag signal. This frame is repeated on the other antenna. A
tag response need only be present on one of the antennas to cause an alarm. In effect the system
provides the best of both worlds, a 2-loop and 3-loop design.
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 3
The switching between antenna loops minimizes the size of detection holes at the null points of
the RF field.
3.0SWITCH SETTINGS
Table 1 explains each of the jumpers on the TR4022 board and 4.0 explains the switches on the
TR4022 board that must be configured before the system will operate. The illustrations on the
next pages shows the position of the jumpers, switches, and potentiometers on the TR4022 board
used during configuration. The top of the shield is held with 4 thumb turn screws. With the top of
the shield removed all the switches can be set without removing the electronics from the antenna.
If for some reason the circuit board needs to be removed from the antenna housing, remove the
three mounting screws from the backside of the board housing. Removing the rear cover of the
antenna assembly can access them. Before completely removing the electronics package from the
antenna loosen the screw near the TX1 and TX2 antenna connector and remove the spade lug.
MAKE SURE WHEN REINSTALLING THE ELECTRONICS PACKAGE THAT THE SPADE
LUG FROM THE SHORTED TURN IS REINSTALLED IN THE SAME PLACE.
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 6
TUNING PROCEDURE TR4022
Table 1: Jumper Definitions
JumperLabelFunction
J12Alarm GroupOn: Will allow all the alarm group relays to
close when any pedestal within the group
alarms.
Off: Will not allow the alarm group signal to
pass to the next pedestal.
J16(NO LABEL)Engineering Jumper.
The access panel must be removed to set all of the above jumpers
Table 2: Pushbutton Switch Definitions
SwitchFunction
SW-1Reset software
SW-2Screen select.
SW-3Screen recall.
Depressing SW2 repeatedly will allow you to toggle from Screen 1 thru Screen 7. The second
pulse of the display found at the DAC test point TP16 identifies the screen being observed. See
Screen 1 on page 11.
Depressing and holding SW3 will cause the display at the DAC test point TP16 to show the results
of the last alarm for the screen being viewed.
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 7
TUNING PROCEDURE TR4022
Switch 4 – Bin Elimination, Filters, Transmitter setting and Alarm Cycle
Select
Switch 4-1
Switch 4-2
Switch 4-3
Switch 4-4
Switch 4-5OFF – Software controlled transmitter
OFF
OFF
Band Edge Bins
Eliminated
OFF
OFF
A FILTER
feature disabled
ON
OFF
High Band Bins
Eliminated
ON
OFF
B FILTER
OFF
ON
Low Band Bins
Eliminated
OFF
ON
C FILTER
ON
ON
Full Band Detect
No Bin Elimination
ON
ON
D FILTER
ON - Software controlled transmitter feature
enabled
Switch 4-6OFF - Short Alarm cycleON – Long alarm Cycle
Switch 5 – System transmit address, Merchandise/Access Card Rejection
SW 5-3SW 5-2SW 5-1Group
Addressing
OFFOFFOFFAddress 0Strata ‘98 Compatible (200hz, sweep down)
OFFOFFONAddress 1100 Hz, jitter enabled, random sweep
OFFONOFFAddress 2100 Hz, jitter enabled, random sweep
OFFONONAddress 3100 Hz, jitter enabled, random sweep
ONOFFOFFAddress 4100 Hz, jitter enabled, random sweep
ONOFFONAddress 5100 Hz, jitter enabled, random sweep
ONONOFFAddress 6100 Hz, jitter enabled, random sweep
ONONONAddress 7100 Hz, jitter disabled, linear sweep down
(Reserved, Engineering mode)
Systems that are ‘slaved’ together
MUST
have the group addressing switches set to the same
address. Conversely systems that are ‘unslaved’ but in close proximity must have unique
addresses. Address 0 is reserved for compatibility with older (Strata ’98) Strata systems and
should not be used in other installations. Address 7 is reserved for observing the analog input
signal.
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 8
Switch 6 – Master/Slave configuration
ONOFF
Switch 6-1Master (generates and
distributes RF and Sync)
The Master/Slave switch controls how the system will handle the sync and rf signals in
and out. A system MUST be in slave mode to use these input signals. In Master mode
these signals must be absent (refer to ‘Sync and RF indicators’ section).
ONOFF
Switch 6-2‘EVEN’ pedestal‘ODD’ pedestal
The Even/Odd switch controls the transmit signal phase. This allows for a improved
received signal in the weaker carries. For rf slaved systems this switch is alternately set
even-odd-even-odd ….etc. For compatibility with older Strata systems ‘On’ is the same
as having the Even/Odd link installed.
Switch 7 – Sweep range select
TUNING PROCEDURE TR4022
Slave (system must receive
Sync signal)
The Strata 99-4022 board introduces the digital synthesis of the sweep frequencies from a DDS
chip. Without any test equipment the system can be setup without tuning for specific sweep
ranges.
SW 7-1SW 7-2Upper Band Edge
OffOffNo shift
OffOnShift down 200 kHz
OnOffNo shift
OnOnShift up 200 kHz
SW 7-3SW 7-4Lower Band Edge
OffOffNo shift
OffOnShift down 200 kHz
OnOffNo shift
OnOnShift up 200 kHz
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 9
4.0 LED DEFINITIONS
System Status Indicators
DS1 – Inhibit Indicator
This LED indicates that a condition exists that would prevent normal detection of a tag,
typically excessive environmental noise. (At the end of an alarm cycle the inhibit LED
will light momentarily)
DS2 – Alarm
This LED indicates the system is alarming (useful for when the sounder and lights are
disconnected).
DS3 - Heartbeat
This LED indicates the system is operating normally. This LED blinks at an approximate
1 Hz rate. If the led is not blinking, it is a catastrophic failure and the board should be
replaced.
DS4 – Transmitter Status
This LED indicates the ‘power’ level of the transmitter, this led is normally on. When the
system detects an event above the alarm threshold it reduces the transmitter power output
and extinguishes the led.
DS5, DS 6 – Spare
(During development DS5 indicates the status of the external sync on power up)
(During development DS6 indicates the status of the external rf on power up)
DS7 – Q Disqualification Indicator
This LED indicates the system has detected a resonance however the ‘Q” of the resonance is
either above or below the limits selected by the ‘Q’ qualification switches.
TUNING PROCEDURE TR4022
Internal and external Sync and RF indicators – DS8, DS9, and DS10
On power up or reset the system ‘reads’ the sync, rf, and switch status and configures the
board appropriately. The configuration algorithm is as follows.
M/S
Switch
(SW 6-1)
MasterAbsentAbsentOK – self generating sync and RF
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
External
RF
Source
External
Sync Source
ConditionDS10
(Master)
Green
OnOffOff
(system is a master)
OffOnOff
generating RF (system is a submaster)
OffOffOn
(system is a slave)
Rev. 00Page 10
DS9
(Sub-master)
yellow
DS8
(Slave)
Red
The system will not operate in any of the above ‘ERROR’ conditions. If an error
condition is indicated the transmitter will be shut down and the system will not ‘pass through’ the
sync pulse.
5.0POTENTIOMETER ADJUSTMENT
The table below provides all of the adjustment pots on the TR4022 board along with their function
and how to adjust each pot. The factory should set all of these pots and field adjustment should
not be necessary.
Table 6: Definition of Adjustment Potentiometers
LabelFunctionProper Adjustment
TUNING PROCEDURE TR4022
TX1 PWR (R38)2-loop Antenna Power
(TX1)
TX2 PWR (R149)3-loop Antenna Power
(TX2)
BASEBAND GAIN
(R89)
VOLUME (R46)Sonalert VolumeAdjust to desired level (CW-increases volume)
Baseband GainUsually set fully CW (maximum gain) Adjust for a maximum of
Screen 2 and Screen 3 have similar formats providing further detail on their respective
2 Loop and 3 Loop DAC signals. Using Screen 2 as an example, the individual 2 Loop DAC
signals are detailed below. The same format would apply for the 3 Loop DAC signals found on
Screen 3.
CHECKPOINT SYSTEMS, INC. CONFIDENTIAL AND PROPRIETARY INFORMATION, FOR INTERNAL USE ONLY.
Rev. 00Page 18
Screen 7
TUNING PROCEDURE TR4022
Screen 7
8.0 TUNING
8.1 Master / Slave Setup
The first step in the process for tuning a Strata pedestal with the TR4022 board is to
configure SW 6-1 according to how the pedestal is used in conjunction with other
pedestals. Configure either as a Master (ON) , or Slave (OFF). See Switch 6 –
Master/Slave configuration
8.2Group Addressing (VERY IMPORTANT)
If the pedestal is working as part of a group of pedestals and connected together by the
interpedestal cable, set the group address at SW5-1, 2, 3 the same for all the pedestals in
the group. See Table 4. If a pedestal or group of pedestals is installed within 40’ of one
another then they may have to be slaved. When slaving is required the group address for
all the pedestals must be set the same.
8.3Slaving
Slaving can be accomplished by attaching a two wire shielded cable with a drain wire to
the OUT connector J8 terminals 4 & 5 (drain wire to terminal 3) on the last pedestal in the
group to the IN connector J7 terminals 4 & 5 (drain wire to terminal 3) on the first