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.

Modern wireless communication systems can use a variety of digital techniques to combine many voice data channels into a complex, composite RF signal. Measurement of such signals with a conventional wattmeter may yield unacceptable errors. The APM-16 employs active circuitry to deliver accuracy of ± 5% for multiple-access technologies such as CDMA, TDMA, FDMA and other digitally-encoded communication systems.

  • 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