Epever TRACER 6420 Bedienungsanleitung
612806420L1-18A August 2005 1
Converting the Frequency Plan of a TRACER 6420 System
Introduction
TRACER 6420 systems are shipped from the factory with the frequency plan programmed as Plan A or Plan B.
Each wireless link must contain a Plan A radio on one end and a Plan B on the other. A frequency plan
conversion may be performed in the field, but should only be attempted if absolutely necessary and must
always be performed by qualified personnel. This document outlines the procedure for changing the frequency
plan of a TRACER 6420 system.
Prerequisite Procedures
The current frequency plan configuration is listed on a label located on the rear panel of the unit (near the
Antenna connector). Record the current configuration before beginning this procedure.
Tools and Materials Required
• 5/16” Torque wrench (8 in-lbs)
• 3/16” nut driver
• Phillips-head screw driver
This document contains digital images showing connectors, cable routings, etc. Connector
placement and cable routings in the images will not be identical to your TRACER 6420
system. Follow the written procedure provided in this guide and refer to the images only
when instructed.
Disconnect all cables attached to the TRACER 6420 system (including power, data,
terminal RS-232, etc.) before performing this procedure.
Do not attempt to perform the conversion without the proper tools (see list below). Using
improper tools will damage the unit.
Electronic equipment can be damaged by static electrical discharge. Before handling
equipment, put on an antistatic discharge wrist strap to prevent damage to components.
Place equipment in antistatic packing material when transporting or storing. When
working on equipment, always place it on an approved antistatic mat that is electrically
grounded.
TRACER 6420 Frequency Conversion Document
2 © 2005 ADTRAN, Inc. 612806420L1-18A
1. Remove any installed modules from the chassis (blank panels covering the module slot openings do
not need to be removed).
2. Remove the screws from the chassis cover using a Phillips-head screwdriver (see Figure 1).
Figure 1. Removing the Cover Screws (TRACER 6420)
3. Carefully slide the cover toward the back of the unit until the front edge of the cover is disconnected
from the front of the unit. Lift the cover off and set aside.
4. Verify the current frequency plan configuration. To verify the plan, check the connections between the
J connectors (located on the edge of the board and labeled J1 and J2) and the Chan connectors
(located on the diplexer). The Chan connectors are labeled CH1 and CH2 for most TRACER 6420
systems. The following table outlines the connections for Plan A and B.
Click to see a digital image of the J connectors or the Chan connectors.
5. Using the torque wrench, disconnect both cables from the Chan connectors on the diplexer. Do not
attempt to disconnect the J connectors (located on the board) as this will cause damage. Click here for
a digital picture of this step.
Perform the steps below in the order listed.
Remove all connected mounting brackets before attempting to remove the unit cover.
TRACER 6420
PLAN CHAN 1 CHAN 2
AJ2 J1
BJ1 J2
TRACER 6420 Frequency Conversion Document
612806420L1-18A © 2005 ADTRAN, Inc. 3
6. Carefully flex the cables to swap the connections. Be careful with the RF cables, making sure that the
minimum bend radius of the cable is greater than 0.75"; bends and loops smaller than a quarter will
cause the RF cable to break. Use the wiring guidelines in Figure 2 for help with wire placement.Click
here for a digital picture of this step.
Figure 2. TRACER 6420 Cable Routing Diagrams
7. Use the torque wrench to reconnect the RF cables to the Chan connectors. Tighten the cables by
turning clockwise until you hear a click from the wrench. DO NOT overtighten connectors as this will
cause the RF cable to break. The TRACER 6420 system will not operate properly with broken RF
cables.
8. Reinstall the cover and carefully tighten all screws.
9. Change label on back of the unit to reflect the Plan change.
Allowing the RF cables to sit on the processor and radio boards (green) could cause
damage to the boards; keep the RF cables off the boards while re-routing them. Click here
for a digital picture of this mistake.
PLAN B
J1 J2
CH 1CH 2
PLAN A
J2
J1
CH 1CH 2
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