Bird - The RF Experts

Ethernet Power Sensor Monitors

A powerful monitoring solution for smaller radio networks for frequency ranges from 100 MHz to 1 GHz.

Maximize Up-Time

A powerful approach to antenna and power monitoring for smaller radio communications systems and paging networks. Designed for smaller sites where the Bird 3141 Channel Power Monitor would be underutilized, and connecting directly to the Internet or private IP network, they can be accessed remotely for both set-up and monitoring.

Bird’s 4042E Channelized Ethernet Power Sensor Monitors provide reliable remote site monitoring to maximize uptime of mission critical communications. Unlike competitive solutions, 4042E RF Power Sensors can monitor for and alarm in the event of a reduced antenna VSWR. This provides an early warning of increased losses in the transmission line resulting from water ingress, damage, or deterioration.

Installed post-combiner, the 4042E can generate alarms according to pre-configured parameters for forward power and minimum/maximum VSWR, then communicated to users with SNMP traps. 4042E is a channelized power sensor allowing for the individual monitoring up to 16 radios.

  • Frequency range 100 MHz to 1000 MHz
  • Monitor antenna failure and radio output simultaneously
  • In-line directional RF true average power by channel or composite power by scanning channels
  • Ethernet Interface
Commercial, industrial, and government land-mobile-radio (LMR) wireless-communications systems including:
  • Public Safety
  • Marine/Coast Guard
  • Private Networks
  • Railroad
  • Civil Aviation
product specifications:
Item No
Item Name
Ethernet, Power Sensor Monitor
Measurement Range - FWD Power
10 W to 500 W
Measurement Range - RFL Power
1 W to 50 W
Measurement Accuracy
± 5% of reading
Measurement Type
One PPT Input
Frequency Range
4042E Series   (100 to 1000 MHz)

Max Forward Power Measurement
       05 = 500 W

Communication Interface
       03 = Ethernet

yy: Input Connector
       01 = N (F)
       02 = N (M)
       03 = 4.3/10 (F)
       04 = 4.3/10 (M)

zz: Output Connector
       01 = N (F)
       02 = N (M)
       03 = 4.3/10 (F)
       04 = 4.3/10 (M)
Channel Bandwidth
6.25, 12.5, 25 kHz selectable
Impedance Ω
50 Ohms, nominal
Loss: 0.2 dB (max)
VSWR: 1.15 (max)
25 dB (min)
Peak-to-Average Ratio
12 dB (max)
Interface: Ethernet 10/100/1000BASE-T (auto-sensing) Version 2.0/IEEE 802.3

RF Connectors
Input: N (M), 4.3/10 (M)
Output: N (F), 4.3/10 (F)
Supported Protocols: TCP/IP Hosted web page, SNMP v2.0 Client
Power Supply: 5.5-40 VDC, 3W max, 0.08 in (2 mm) power jack. 15 VDC adapter included
Operating Position: Any
Push-to-Talk input (PTT) for spurious alarm suppression: NO or NC logic (software selectable)
3.5mm terminal push-lock, optically isolated
Humidity: 95% max, noncondensing
Altitude: 15,000 ft (4,572 m) max

Operating: 0 to 50 °C (32 to 122 °F) | Storage: -40 to 80 °C (-40 to 176 °F)
Size (without connectors): 5.2 in x 3.8 in x 1.4 in (13.2 cm x 9.7 cm x 3.6 cm)
Weight: 0.5 lb (0.23 kg)
compatible devices:
Channel Power Monitor Display
Channel Power Sensor, RJ-25
Directional Power Sensor, RJ-25
Ethernet, Directional Power Sensor Monitor
Non-Directional Power Sensor