ACM Series Antenna Cable Monitors
ACM Series
ACM Series Antenna Cable Monitors
Bird Technologies - The RF Experts

ACM Series

ACM Series, Antenna & Cable Monitors are 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.

  • Models available from 136-225 MHz, 225-520 MHz, 470-960 MHz, 960-2400 MHz Accurately monitors your antenna and cable system VSWR levels.
  • Integral coupler with high directivity optimizes measurement accuracy. Measures small changes in antenna VSWR with high feeder and interface losses.
  • Provides alarms if an antenna or cable failure should occur.
  • Available with Ethernet or serial interface. 
  • Monitors transmitter output power and includes low or high power alarms.
  • Measures true average power of signals with high peak-to-average characteristics - works with any modulation!
  • Included as standard Push-To-Talk (PTT) input to avoid false alarm triggering when the transmitter (radio) is not keyed.

 

Applications:
Includes 3G, AMPS., Broadcast, CHAM, CHAM 2000, DSC, EDGE, Government, GRIS, GUM, iden, Industrial, NYSSA, Microwave, Military, Paging, Public Safety, Rail, SMUR, TEMA, Tetrapolar, Trunking, UHF, Utilities, VHF, W-CHAM and WLL .

ACM Part Number Definition
Model/ Power Range (Watts)
Freq Range (MHz)
RF Input Conn.
RF Output Conn.
Monitor Port
Input Voltage
ACM = 2.5 - 100
L1 = 136 - 225
NM = N Male
NM = N Male
N = N Female
L= + (11 to 25) VDC
ACM 500 = 12.5 - 500
L2 = 225 - 520
NF = N Female
NF = N Female
T = TNC Female
H = ± (36 to 72) VDC
M = 470 - 960
DM = 7/16 DIN Male
DM = 7/16 DIN Male
B = BNC Female
H = 960 - 2400 *
DF = 7/16 DIN Female
DF = 7/16 DIN Female

* “H” Frequency Band Unavailable with the ACM 500 Version.

ACMI Part Number Definition
Model/ Power Range (Watts)
Freq Range (MHz)
RF Input Conn.
RF Output Conn.
Monitor Port
Input Voltage
ACMI = 2.5 - 100
L1 = 136 - 225
NM = N Male
NM = N Male
N = N Female
L= + (11 to 25) VDC
ACMI 500 = 12.5 - 500
L2 = 225 - 520
NF = N Female
NF = N Female
T = TNC Female
M = ± (18 to 36) VDC
M = 470 - 960
DM = 7/16 DIN Male
DM = 7/16 DIN Male
B = BNC Female
H = ± (36 to 72) VDC
H = 960 - 2400 *
DF = 7/16 DIN Female
DF = 7/16 DIN Female

* “H” Frequency Band Unavailable with 500 W Version.

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product specifications:

Item NoACM Series
Item NameACM Series, Antenna and Cable Monitors
Frequency Range136-225 MHz
225-520 MHz
470-960 MHz
960-2400 Mhz
Measurement RangeACM: 2.5 W to 100 W
ACM 500: 12.5 W to 500 W

ACMI: 2.5 to 100W
ACMI500: 12.5 to 500 W
Power Accuracy136-225 MHz, ± 10%
225-520 MHz, ± 8%
470-960 MHz, ± 5%
960-2400 MHz, ± 5%
Insertion Loss0.1 dB (136 - 960 MHz)
0.15 dB (960 - 2400 MHz)
VSWR1.07 (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)
Reflected Directivity30 dB (136 to 960 MHz)
26 dB (960 to 2400 MHz)
Alarm Characteristics-VSWRAlarm Set Point: 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
Relay Contact Type: Dry, Form C, relay contacts, common, normally open, normally closed
Contact Rating: 100 VDC @ 0.5A
Visual Alarm: Red LED will illuminate to indicate alarm
Stimulus: VSWR set point exceeded, response time proportional to overload
Reset: Local Mechanical reset switch Remote input (Reset if VDC is 0 to +0.8 volts)
Push to Talk: +5/+24 VDC to activate
Monitor PortsConnectors: Female N, TNC or BNC
Coupling: -63 dB approx., Subject to changes in full-scale power
Interface Specifications ACM: RS-232 9600 baud, no parity, 8 data birts,
Serial Port 1 stop bit, no handshake
ACMI:Ethernet Port
Network Interface 10/100-BASE-T (auto-sensing)
Compatibility Ethernet Version 2.0 / IEEE 802.3
Protocols ARP, UDP/IP, DHCP, BOOTP, Auto IP, HTTP, and SNMP
Left LED Amber: 10 Mbps. Green: 100 Mbps
Right LED Amber: Half-duplex. Green: Full-duplex
Security 128-bit encryption
GeneralThruline® sensor for direct insertion in 50-ohm line
RF ConnectorsN or 7/16 DIN, see chart above
Maximum Line Section PowerDependent on frequency and connector
Alarm--Power Connector15-pin Female “D” connector
TemperatureOperating: 0 to 50°C
Storage: -20 to 80°C
Humidity0 to 95% (non-condensing) max.
AltitudeUp to 3000 meters above sea level
Passive Intermodulation ProductsLess than -130 dBc
Power RequirementsACM: +11 to +26 VDC or ±36 to ±72 VDC
ACMI: ±9 to 18 VDC or ±18 to 36 VDC or ±36 to 72 VDC
Dimensions4.8” (121 mm) wide (7.6” (192.mm) with connectors)
7.2” (183mm) high, 1.06“ (27mm) deep
WeightLess than 2 lbs. (0.9 kg)
EMCEuropean Standard EN 61326-1:1997 + Addendums A1: 1998 and A2:2001 - Electrical equip. for measurement
SafetyEuropean Standard EN 61010-1:2001 - Safety Requirements - Electrical equip. for measurement, control and laboratory use - ECM Requirements.

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accessories:

ACM-RACK
ACM Series Rack Kit
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ACM Series Rack Kit with Power Supply