Bird - The RF Experts

Average Reading RF Power Meter

The APM-16 RF Wattmeter is designed to keep pace with the ever growing complexity of digitally-based communication systems. Bird's Model 43 and most other wattmeters available today were designed to measure power of constant amplitude, sinusoidal waveforms.

With today’s increasingly common digital RF technologies where accurate average power measurement of such signals with a conventional wattmeter may yield unacceptable errors measurements, the APM-16 can accurately measures analog and complex digital RF signals to +/-5% of Reading and can be used for pre or post combiner power measurements.

  • Designed especially for RF power measurement in PCS, cellular, ESMR, paging and similar communication systems
  • Equally effective for measuring RF power in conventional analog systems
  • Uses APM-series plug-in elements to cover a wide range of frequency and power levels. Simple Thruline® style operation for instant forward or reflected power readings
  • Interchangeable QC connectors for fast hook-up
product specifications:
Item No
Item Name
Average Reading Power Meter
Power Range
1 W to 1000 W
Frequency Range
2 MHz to 2.3 GHz
Insertion VSWR
with N Connector 1.05 max. to 1000 MHz
10°C to 35°C ± 4% reading, ± 1% full scale
-20°C to 50°C ± 6% reading, ± 2% full scale
Peak to Average Ratio
In excess of 10 dB
Setting Time
< 1 second
QC Type (Female N normally supplied)
95% ± 5% max. (non-condensing)
Internal 9 volt
Operating Temperature
-20 °C to 50 °C (-4 °F to 122 °F)
Storage Temperature
-25 °C to 65 °C (-13 °F to 149 °F)
Meter Scales
Shock mounted, linear scale with expanded scales of 25, 50 and 100 for full scale 1 to 1000 W readings. Mirrored scale includes 5% overrange.
Black Powder Coat
(H x W x D)
6.88 in x 5.13 in x 3.63 in
175 mm x 130 mm x 92 mm
3 lbs. (1.4 kg)
compatible devices:
APM Elements
APM Series, Elements
Carrying Case - Portable Thruline®, Load, Signal Sampler, QC Connectors and 4 Elements
Carrying Case - Thruline® Wattmeter, 5 Elements and 1 Small Load
Carrying Case - 12 Plug-In Elements
9V, Alkaline Battery