美國鳥牌Bird|4305A高功率通過式功率計(jì)頻率范圍為：450kHz-2.3GHz，功率范圍為： 50W-25KW。
· High-Power Wattmeter
The 4305A Wattmeter is a field-proven portable, insertion-type instrument designed to measure both forward and reflected CW power in coaxial
transmission lines under any load condition. With a full-scale accuracy of ± 5%, it accuray measures RF power with low added VSWR
and insertion loss. QC （quick change） type connectors and a full range of plugin
elements provide a wide choice of frequency ranges and power levels.
Accurate CW power measurement over 450 kHz to 2.3 GHz and 50 W to 25 KW
· Uses 4305A and 1-5/8" elements
· Constructed with a 1-5/8” line section for higher power measurements
· Quick Change （QC） connectors to minimize the need for adaptors when making
critical measurements
| Power Range | 50 W - 25 kW |
| Frequency Range | 450 kHz-2.3 GHz （depending on element） |
| Accuracy | ± 5% of full scale |
| Insertion VSWR | N Connectors 1.05 max. |
| Connectors | QC Type （Female N normally supplied） |
| Finish | Gray Powder Coat |
| Nominal Size [inches （mm）] | 6-5/16" x 5-1/8" x 4-1/4", including connectors （H x W x D）
161 x 131 x 108 mm |
| Weight | 4 lbs. （1.8 kg） |
| Note | Quoted accuracy only when used with other Bird® Products. |
| Item # | Item Name | Power | Frequency Range （MHz） | 
|
| 25KP7 | 4305A Elements | 25 kW | 0.45-2.5 | 
|
| 10KH7 | 4305A Elements | 10 kW | 2-30 | 
|
| 2500B7 | 4305A Elements | 2500 W | 50-125 | 
|
| 5000B7 | 4305A Elements | 5000 W | 50-125 | 
|
| 2500C7 | 4305A Elements | 2500 W | 100-250 | 
|
| 2500E7 | 4305A Elements | 2500 W | 400-1000 | 
|
| 50K7 | 4305A Elements | 50 W | 1100-1800 |
| 500H12 | Table 1-5/8AA - Standard Elements 30μA | 2-30 | 500 W |
| 1000H12 | Table 1-5/8AA - Standard Elements 30μA | 2-30 | 1000 W |
| 2500H12 | Table 1-5/8AA - Standard Elements 30μA | 2-30 | 2500 W |
| 5000H12 | Table 1-5/8AA - Standard Elements 30μA | 2-30 | 5000 W |
| 10KH12 | Table 1-5/8AA - Standard Elements 30μA | 2-30 | 10 kW |
| 25KH12 | Table 1-5/8AA - Standard Elements 30μA | 2-30 | 25 kW |
| 100B12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 100 W |
| 250B12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 250 W |
| 500B12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 500 W |
| 1000B12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 1000 W |
| 2500B12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 2500 W |
| 5000B12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 5000 W |
| 10KB12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 10 kW |
| 25KB12 | Table 1-5/8AA - Standard Elements 30μA | 50-125 | 25 kW |
| 100C12 | Table 1-5/8AA - Standard Elements 30μA | 100-250 | 100 W |
| 250C12 | Table 1-5/8AA - Standard Elements 30μA | 100-250 | 250 W |
| 500C12 | Table 1-5/8AA - Standard Elements 30μA | 100-250 | 500 W |
| 1000C12 | Table 1-5/8AA - Standard Elements 30μA | 100-250 | 1000 W |
| 2500C12 | Table 1-5/8AA - Standard Elements 30μA | 100-250 | 2500 W |
| 5000C12 | Table 1-5/8AA - Standard Elements 30μA | 100-250 | 5000 W |
| 100E12 | Table 1-5/8AA - Standard Elements 30μA | 400-1000 | 100 W |
| 250E12 | Table 1-5/8AA - Standard Elements 30μA | 400-1000 | 250 W |
| 500E12 | Table 1-5/8AA - Standard Elements 30μA | 400-1000 | 500 W |
| 1000E12 | Table 1-5/8AA - Standard Elements 30μA | 400-1000 | 1000 W |
| 2500E12 | Table 1-5/8AA - Standard Elements 30μA | 400-1000 | 2500W |
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