4421, Multi-Function Power Meter
4421, Multi-Function Power Meter
Bird Technologies - The RF Experts


Precision Power Meter for Semiconductor Processing Applications
4421 Multifunction Power Meter is a precision RF instrument that, while originally intended for general purpose laboratory applications where high accuracy is required, has found wide acceptance in semiconductor processing applications. The product is configured as a system, consisting of the 4421 and a precision power sensor selected for the application based upon maximum power and operating frequency.

  • ±1% Accuracy - Accomplished through the use of sensors with an automatic frequency compensation scheme, where the error contributions due to directional coupler frequency response characteristics are eliminated.
  • Wide Dynamic Range - The instrument will meet the full accuracy specification over a 35 dB dynamic range.
  • Excellent Measurement Repeatability - Typically <0.1%
  • Digital Display - Along with automatic VSWR calculation
  • Computer Interface - RS-232 and IEEE-488 standard

Bird Technologies Store - Shop Online

Request Information View Accessories


product specifications:

Item No4421
Item NameMultifunction Power Meter
Power RangeSensor Dependent
Frequency RangeSensor Dependent
VSWR Range1.0 - 199.9 max
FunctionsForward and reflected power in W or dBm, VSWR, return loss in dB and min./max. values
Over rangeAudible warning when RF power input exceeds 120% of sensor's maximum power range
Indication DisplayLCD, 4½ digit display. Indicates mode, measurement units, battery condition, remote status, and signal increase/decrease. Self contained backlight
Operating Power115/230 VAC, 50/60 Hz; 60W or 8 nickel metal hydride 1.2v cells, rechargeable
Weight10 lbs (4.5 kg)
Interconnects1 meter Latch-n-Lock Coiled Cable
InterfacesOptional: IEEE-488 GPIB, RS-232
Dimensions10.7"L x 12.25"W x 4.25"H
271 x 310 x 109 mm

Request Information


Carrying Case - 4421 Wattmeter and Power Sensors
4421 Multifunction Power Meter Rack Mount Kit