 Bird’s®
Antenna & Cable Monitor is the solution for monitoring your transmission antenna systems. Service providers and self maintained end user’s can rely on this monitor and alarm to keep their critical sites up and running. Designed to detect antenna and cable faults that transmitter-internal VSWR monitors may not detect, it also provides accurate in-line power measurement functionality.
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Worldwide systems include Tetra, Cellular and PCS with digital or analog modulation
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Include 3G, AMPS, Broadcast, CDMA, CDMA 2000, DCS, EDGE, Government, GPRS, GSM, iDEN, Industrial, NPSPAC, Microwave, Military, Paging, Public Safety, Rail, SMR, TDMA, Tetrapol, Trunking, UHF, Utilities, VHF, W-CDMA and WLL
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Models available from 136-225 MHz, 225-520 MHz, 470-960 MHz, 960-2400 MHz Accurately monitors your antenna and cable system VSWR levels
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Integral coupler with high directivity optimizes measurement accuracy. Measures small changes in antenna VSWR with high feeder and interface losses.
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Provides alarms if an antenna or cable failure should occur
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Monitors transmitter output power and includes low or high power alarms
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Measures true average power of signals with high peak-to-average characteristics - works with any modulation!
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Sample ports allow measurement of the forward and reflected signals without the need for system downtime ACM-SS15 Surge suppressor for 15-pin power and alarm connector, compatible with +11 to +25 VDC or ±36 to ± 72 VDC
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ACM Part Number Definition
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Model/ Power Range (Watts)
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Freq Range
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RF Input
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RF Output
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Monitor Port
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Input Voltage
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ACM = 2.5 - 100
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L1 = 136 - 225 MHz
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NM = N Male
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NM = N Male
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N = N Female
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L= + (11 to 25) VDC
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ACM 500 = 12.5 - 500
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L2 = 225 - 520 MHz
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NF = N Female
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NF = N Female
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T = TNC Female
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H = ± (36 to 72) VDC
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M = 470 - 960 MHz
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DM = 7/16 DIN Male
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DM = 7/16 DIN Male
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B = BNC Female
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H = 960 - 2400 MHz*
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DF = 7/16 DIN
Female
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DF = 7/16 DIN Female
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Specifications
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Frequency Range (MHz)
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136-225
225-520
470-960
960-2400
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Measurement Range
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ACM: 2.5 W to 100 W
ACM 500: 12.5 W to 500 W
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Power Accuracy
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136-225 MHz, ± 10%
225-520 MHz, ± 8%
470-960 MHz, ± 5%
960-2400 MHz, ± 5%
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Insertion Loss (dB)
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0.1 dB (136 - 960 MHz)
0.15 dB (960 - 2400 MHz)
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VSWR
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1.07 (136 to 960 MHz)
1.1 (960 to 2400 MHz, N Connectors)
1.1 (960 to 2000 MHz, 7/16 Connectors)
1.2 (2000 to 2400 MHz, 7/16 Connectors)
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Directivity (dB)
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Reflected Directivity
30 dB (136 to 960 MHz)
26 dB (960 to 2400 MHz)
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RF Connectors
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N or 7/16 DIN
See ACM Part Number Definition Chart
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Trace Resolutions
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238 (default), 475, or 949 per trace data points
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Maximum Line Section Power
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Dependent on frequency and connector
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Alarm/Power Connector
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15-pin Female "D" connector
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Operating Temperature (°C)
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-20°C to 80°C
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Storage Temperature (°C)
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9-pin
RS-232 (DB9), compatible with serial port
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Humidity, Max.
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0 to 95% (non-condensing)
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Altitude
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Up to 3000 meters above sea level
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Passive Intermodulation Products
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Less than -130 dBc
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Power Requirements
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+11 to +26 VDC or ±36 to ±72 VDC
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Dimensions
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4.75” (121 mm) wide (7.55” (192.mm) with connectors)
4.2” (107mm) high, 1.06“ (27mm) deep
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Weight [lbs (kg)]
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Less than 2 lbs. (0.9 kg)
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Altitude
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Up to 15,000 feet (4572 m)
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Weight [lbs (kg)]
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10.5" x 8.4" x 3.3"
(265 mm x 212 mm x 83 mm)
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EMC
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European Standard EN 61326-1:1997 + Addendums A1: 1998 and A2:2001 - Electrical equip. for measurement, control and laboratory use
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Safety
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European Standard EN 61010-1:2001 - Safety Requirements - Electrical equip. for measurement, control and laboratory use - ECM Requirements.
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VSWR Alarm Characteristics
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Alarm Set Point:
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1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5 to 1
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Relay Contact Type:
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Dry, Form C, relay contacts, common, normally open, normally closed
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Contact Rating:
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100 VDC @ 0.5 A
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Visual Alarm
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Red LED will illuminate to indicate alarm
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Stimulus:
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VSWR set point exceeded, response time proportional to overload
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Reset:
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Local Mechanical reset switch.
Remote input(Reset if VDC is 0 to +0.8 volts)
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Monitor/ Interface Ports
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Monitor Ports :
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Connectors:
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Female N, TNC or BNC
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Coupling:
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-63 dB approx., [Subject to changes in full-scale power]
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Interface Port :
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Connector:
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Female DB-9, compatible with IBM PC AT serial port
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Protocol:
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Serial RS-232, 9600 baud, no parity, 8 data bits, 1 stop bit, no handshake
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View more detailed specifications in the Data Sheet (203
KB).
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