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

ACM Series Antenna & Cable RF Power Monitors are the solution for monitoring your RF transmission 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 RF in-line power measurement functionality.

Features
  • Models available from 108-144 MHz, 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 multiple alarms if an antenna or cable failure should occur
  • 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!
  • Remote access with both monitoring and control via serial and ethernet interfaces
  • Included as standard Push-To-Talk (PTT) input to avoid false alarm triggering when the transmitter (radio) is not keyed.

Applications:
3G, Low Power Broadcast, CDMA, CDMA 2000, Edge, GSM, Government, Microwave, Military, Paging, Public Safety, Rail, TDMA, TETRA, TETRAPOL, VHF & UHF, LMR and WLL

ACM (Serial) Part Number Definition

Model (Power Range) Freq. Range (MHz) RF Input Conn. RF Output Conn. Monitor Port Input Voltage
ACM (2.5 - 100W) L0 = 108-144 NM = N (M) NM = N (M) N = N (F) L= ± (11 to 25) VDC
ACM 500 (12.5 - 500 W) L1 = 136-225 NF = N (F) NF = N (F) T = TNC (F) H = ± (36 to 72) VDC
  L2 = 225-520 DM = 7/16 DIN (M) DM = 7/16 DIN (M) B = BNC (F)  
  M = 470-960 DF = 7/16 DIN (F) DF = 7/16 DIN (F)    
  H = 960-2400 MHz*        

* “H” Frequency band unavailable for model ACM 500

ACMI (Ethernet) Part Number Definition

Model/Power Range Freq Range (MHz) RF Input Conn. RF Output Conn. Monitor Port Input Voltage
ACMI (2.5 - 100W) L0= 108-144 MHz NM = N (M) NM = N (M) N = N (F) L= ± (8 to 18) VDC
  L1= 136-225 MHz NF = N (F) NF = N (F) T = TNC (F) M = ± (18 to 36) VDC
ACMI 500 (12.5 - 500W) L2 = 225-520 MHz DM = 7/16 DIN (M) DM = 7/16 DIN (M) B = BNC (F) H = ± (36 to 72) VDC
  M = 470-960 MHz DF = 7/16 DIN (F) DF = 7/16 DIN (F)    
  H = 960-2400 MHz*        

* “H” Frequency band unavailable for model ACMI 500

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ACM Series Antenna Cable Monitors
ACM Series
product specifications:
Item No
ACM Series
Item Name
ACM Series, Antenna and Cable Monitors
Frequency Range
108-144 MHz
136-225 MHz
225-520 MHz
470-960 MHz
960-2400 MHz
Measurement Range
ACM: 2.5 to 100 W
ACM 500: 12.5 to 500 W

ACMI: 2.5 to 100 W
ACMI 500: 12.5 to 500 W
Power Accuracy
108-144 MHz, ± 8%
136-225 MHz, ± 10%
225-520 MHz, ± 8%
470-960 MHz, ± 5%
960-2400 MHz, ± 5%
Insertion Loss
0.1 dB (108-960 MHz)
0.15 dB (960-2400 MHz)
VSWR
1.07 (108-960 MHz, N or 7/6 DIN Connectors)
1.1 (960-2400 MHz, N Connectors)
1.1 (960-2000 MHz, 7/16 DIN Connectors)
1.2 (2000 to 2400 MHz, 7/16 DIN Connectors)
Reflected Directivity
30 dB (108-960 MHz)
26 dB (960-2400 MHz)
Alarm Characteristics-VSWR
Alarm 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 Ports
Connectors: 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
General
Thruline® sensor for direct insertion in 50-ohm line
RF Connectors
N or 7/16 DIN, see chart above
Maximum Line Section Power
Dependent on frequency and connector
Alarm--Power Connector
15-pin Female “D” connector
Temperature
Operating: 0 to 50°C
Storage: -20 to 80°C
Humidity
0 to 95% (max), non-condensing
Altitude
Up to 3000 meters above sea level
Passive Intermodulation Products
Less than -130 dBc
Power Requirements
ACM: ±11 to 6 VDC (or ±36 to 72 VDC)
ACMI: ±9 to 18 VDC (or ±18 to 36 VDC; or ±36 to 72 VDC)
Dimensions
4.8” (121 mm) wide | 7.6” (192 mm) with connectors)
7.2” (183 mm) high, 1.06" (27 mm) deep
Weight
Less than 2 lbs. (0.9 kg)
EMC
European Standard EN 61326-1:1997 + Addendums A1: 1998 and A2:2001 - Electrical equip. for measurement
Safety
European Standard EN 61010-1:2001 - Safety Requirements - Electrical equip. for measurement, control and laboratory use - ECM Requirements.
accessories:
ACM-RACK
ACM Series Rack Kit
ACM-RACKU
ACM Series Rack Kit with Power Supply