Bird - The RF Experts

100 MHz - 1 GHz, Channel RF Power Sensors

Provides power readings by individual channel

4042 Series, Directional Channel Power Sensors are digital RF sensors designed for use with the 3141 Channel Power Monitor (CPM). The sensors are typically used to measure forward and reflected average power on a 50 ohm RF transmission line with maximum 500 watt forward and reflected power levels in a frequency band with an overall range of 100 to 1000 MHz. The 4042 sensor also provides VSWR readings.

The 4042 Channel Sensor is unique in that it is able to measure the forward power, reflected power and VSWR of a SINGLE CHANNEL in the presence of multiple channels at the output of a frequency combiner. The sensor can also measure the forward power, reflected power and the VSWR of the composite signal by scanning up to 16 individual channels and summing their power.

The 4042 Channel Sensor uses an RS-485 serial bus for data transfer to and from a CPM. Each sensor is equipped with two RJ-25 jacks, either jack may be connected to a CPM. The second RJ-25 jack may be used to extend the RS-485 bus to another digital sensor. Multiple digital sensors may be serially connected in this fashion, allowing as many as 16 sensors to be connected to a CPM.

product specifications:
Item No
Item Name
Channel Directional RF Power Sensor - RJ-25
Frequency Range
4042-1-430505-yyzz   (100 MHz to 1000 MHz)
(See connection options below to build part number)

Communication Interface
       05 = RS-485 via RJ-25

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)
Forward Power Measurement Range
25 to 500 W (05 option)
1 to 50 W (06 option)

(Measure power and VSWR for up to 16 frequencies or channels with selectable bandwidths of 6.25, 12.5 or 25 kHz)
Max Reflected Power Measurement
10 dB below Forward Power Range
Dynamic Range
17 dB
Impedance Ω
±5% of reading
Loss: <0.2 dB
VSWR: <1.15:1 (max)
Intermodulation Distortion - PIM
<-145 dBc
Power Supply
7-18 VDC, <500 mA (from 3141)
0 to 50°C (32 to 122 °F)
5.2"x 3.8" x 1.4" (132 x 96.5 x 35.5 mm)
.6 lb (.27 kg)
Standard Accessories
10' RJ-25 Interface Cable
compatible devices:
Channel Power Monitor Display
Channel Power Sensor Monitors - Ethernet
Directional RF Power Sensor - RJ-25
Directional Power Sensor Monitors - Ethernet
Non-Directional RF Power Sensor
Directional RF Power Sensor