Safety Precautions The following are general safety precautions that are not necessarily related to any specific part or procedure, and do not necessarily appear elsewhere in this publication. These precautions must be thoroughly understood and apply to all phases of operation and maintenance. WARNING Keep Away From Live Circuits Operating Personnel must at all times observe general safety precautions.
Safety Precautions Safety Symbols WARNING Warning notes call attention to a procedure, which if not correctly performed, could result in personal injury. CAUTION Caution notes call attention to a procedure, which if not correctly performed, could result in damage to the instrument. Note: Calls attention to supplemental information.
Antenna & Cable Monitor Caution Statements The following equipment cautions appear in the text and are repeated here for emphasis. CAUTION The input voltage must be clean and stable. Be sure that the input voltage does not surge and does not contain spikes. Failure to comply may result in permanent damage to the instrument.
Safety Precautions Safety Statements USAGE ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY PROTECTION. EL USO DE ESTE INSTRUMENTO DE MANERA NO ESPECIFICADA POR EL FABRICANTE, PUEDE ANULAR LA PROTECCIÓN DE SEGURIDAD DEL INSTRUMENTO.
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Antenna & Cable Monitor SERVICE SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE - TRAINED PERSONNEL ONLY. TO AVOID DANGEROUS ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING UNLESS QUALIFIED TO DO SO. SERVICIO LAS INSTRUCCIONES DE SERVICIO SON PARA USO EXCLUSIVO DEL PERSONAL DE SERVICIO CAPACITADO.
About This Manual About This Manual Sample Model ACM–M–DMNFTL-M1 470 – 960 MHz ACM with male 7/16 input, female N output, female TNC monitor ports, requiring a low voltage power supply Base Frequency Range Monitor Port Power Supply Motorola Model (MHz) RF Connectors Connectors...
Antenna & Cable Monitor Changes to this Manual We have made every effort to ensure this manual is accurate. If you discover any errors, or if you have suggestions for improving this manual, please send your comments to our Solon, Ohio factory. This manual may be periodically updated.
Chapter 1 Introduction Designed for 50 ohm coaxial transmission lines, the Bird Antenna & Cable Monitor is the solution for monitoring transmission antenna systems. Service providers and end users can rely on it to keep their critical sites up and running.
Antenna & Cable Monitor Items Supplied ACM Unit Instruction Manual Optional Accessories Note: See for part numbers of "Replacement Parts" on page 29 accessories. PCTool Software — PC software for data display, alarm monitoring, and setting alarm options DB-15 Power/Alarm Cables —...
Introduction Component Description Figure 1 Antenna & Cable Monitor Outline RF Input Connects to the amplifier or combiner Forward Monitor Port Samples the forward traveling wave Reflected Monitor Port Samples the reflected wave RF Output Connects to the antenna or feeder Four holes, two top and two bottom, for positioning Mounting Holes the ACM on a rack.
Theory of Operation Alarm Response When an alarm is triggered, the Bird Antenna & Cable Monitor turns on the alarm LED and activates one of two Form C dry contact relays. The alarm relays default to fail/safe. That is, the alarm activates when the relay is not energized or power is lost.
Antenna & Cable Monitor reverse power is increasing, an alarm is triggered. If the reverse power is stable, measurements continue until a trend is established. An alarm will be triggered if the VSWR exceeds the maximum for more than thirty seconds. ...
Note: Immediately notify the shipping carrier and Bird Electronic Corporation of equipment damage or missing parts. The Bird ACM is shipped complete and ready for use upon receipt. After unpacking and inspecting the unit, it is ready to be installed.
Figure 4 on page 8 When connecting the Bird ACM to RF power, use 50 ohm coaxial cable suitable for the frequency and power level of operation. The cable connector should mate with the connector on the unit.
Installation Power/Alarm Connector Connect the external power supply here. Pin numbers and descriptions are given in Figure 5 CAUTION The input voltage must be clean and stable. Ensure that the input voltage does not surge and does not contain spikes. Failure to comply may result in permanent damage to the instrument.
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Antenna & Cable Monitor Figure 5 High Voltage DB-15 Power/Alarm Connector, Female Description Relay 1, normally closed contact (closed when relay is not energized) (open when there is no alarm) Relay 1, common contact Alarm output, TTL compatible TTL High ( 4.3 VDC with a 10k load) = no alarm TTL Low (<0.2 VDC) = alarm PTT input, +5V to +24V to activate,...
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Installation Figure 7 Low Voltage DB-15 Power/Alarm Connector, Female Description Relay 1, normally closed contact (closed when relay is not energized) (open when there is no alarm) Relay 1, common contact Alarm output, TTL compatible TTL High ( 4.3 VDC with a 10k load) = no alarm TTL Low (<0.2 VDC) = alarm PTT input, +5V to +24V to activate, 0V or open to deactivate...
DB-9 cable. Do not use a null modem adapter. The port is configurable from within the PCTool software. To use the Bird PCTool software, install it on the computer and start the application. Refer to "PCTool Software" on page 15 information about using the program.
Failure to comply may result in permanent damage to the instrument. Rack Mount To install a Bird Antenna Monitor in the rack mount, follow these instructions (Refer to Figure 2 on page 4 1.
7. Secure the ACM panel into the rack using the four mounting screws. PCTool Software Computer Requirements The Bird PCTool software will run on any computer running Windows XP, SP3 or greater. To install and run the program, your computer system must meet or exceed the requirements listed below: ...
Chapter 4 Operating Instructions PCTool Software Main Screen The PCTool communicates with and configures the Bird Antenna & Cable Monitor. It displays forward and reverse power along with VSWR, return loss, match efficiency and transmitted power. shows a sample of the Figure 10 display screen.
Antenna & Cable Monitor Com Settings The PCTool software must be set to use the correct Com Port to communicate with the Antenna Monitor. The default is Com Port 1. To change the Com Port, select the correct one from the “View>Comm Port” menu, shown in Figure 11 below.
Operating Instructions Figure 12 Options Menu Enable Alarm Allows the alarm to work. Each of the following alarms have separate Enable checkboxes: High VSWR: Calculated VSWR exceeds a setpoint. High Forward Power: Measured power exceeds a setpoint. Low Forward Power: Measured power is less than a setpoint.
Antenna & Cable Monitor VSWR Alarm — Adjustable from 1.3 to 2.5 by increments of 0.1. To allow the VSWR alarm to trigger even at low forward power (< 2.5% of full scale power), check the “Alarm on Zero Power” checkbox. While the VSWR trip point can now be set out to 2.5, the instrument cannot always measure VSWR above 1.9.
Operating Instructions Push-to-Talk Setting Push-to-Talk 1. Open the Power Monitor Options dialog. 2. Do one of the following: Check the Enable checkbox to turn the Push-to-Talk feature on. Uncheck the Enable checkbox to turn the Push-to-Talk feature off. 3.
Antenna & Cable Monitor Analog Output Gain This setting controls the sensitivity of the two analog outputs on the ACM. The output level for the two channels are proportional to the measured power in the forward and reflected directions. The output range is 0 to 5.0 V with 10 bits of resolution.
Operating Instructions Terminal Commands There are three commands which can be sent when the Bird Antenna Monitor is connected to a terminal. “T” The “T” command will cause the unit to echo a single measurement. The format nnn.n,nn.nnXX<CR><LF> That is, three digits of forward power, a decimal point, a fourth digit of forward power, a comma, followed by two digits of reverse power, a decimal point, and two digits of reverse power.
Chapter 5 Maintenance This chapter contains troubleshooting instructions, part information, and specifications for the Bird Antenna & Cable Monitor. Inspection and Cleaning This unit requires only simple and routine maintenance. WARNING Disconnect the unit from the RF power source and the AC line before any disassembly.
Maintenance Troubleshooting The Bird Antenna Monitor has no operator serviceable parts. Any required service must be performed at an authorized service facility. The table below contains troubleshooting information for problems which can occur during normal operation. This manual cannot list all malfunctions that may occur, or their corrective actions.
Antenna & Cable Monitor Wiring the ACM Rack Mount Note: The power/alarm connectors for the Bird ACM Rack Mount are provided wired to the terminal strips. shows the wir- Figure 14 ing schematic for M1 configurations. shows the wiring Figure 15 schematic for M2 configurations.
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Maintenance Figure 14 M1 48V Wiring Schematic NO High VSWR NC High VSWR Com High VSWR NO Low Fwd Pwr NC Low Fwd Pwr Com Low Fwd Pwr Reflected Pwr 5V Forward Pwr 5V Alarm Reset Earth Gnd Connect Pink wire Earth Gnd from ACM-Panel For Low Voltage models,...
If the unit needs to be returned for any reason, request an Return Material Authorization (RMA) through the Bird Technologies website. All instruments returned must be shipped prepaid and to the attention of the RMA number.
Maintenance Specifications General Directivity, Min. 136 – 960 MHz 30 dB 960 – 2400 MHz 26 dB 1.3:1.0 to 2.5:1.0 by 0.1:1.0 steps. Refer to VSWR Alarm Setpoint "Power/Alarm Connector" on page 9 information about power limitations. Dry, form C. Common, normally open, & Alarm Relays normally closed contacts.
Maintenance Replacement Parts Description Part Number Instruction Manual 920-ACM-MOT PCTool Software 7005A970 Rack Mount Kit With 48VDC power supply ACM-RACKU48-M1 With 15VDC power supply ACM-RACKU12-M1 Panel Mount Kit With 48VDC power supply ACM-PANEL-M1 With 15VDC power supply ACM-PANEL-M2 9 pin RS-232 Interface Cable 50 ft.
Limited Warranty All products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one (1) year, unless otherwise specified, from date of shipment and to conform to applicable specifications, drawings, blueprints and/or samples. Seller’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted;...
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