美國鳥牌（BIRD）Bird4391A|4391A |鳥牌4391A 通過式功率計
 

PEP-Dual Element, Power Analyst
The Model 4391A is a Rugged RF Power Analyst that monitors Peak Pulse Power, Peak Envelope Power, or CW Power during normal equipment operations in the forward or reflected direction. Designed for air navigational aids DME, ATC and other pulsed RF systems such as emetry, radar, command and control, etc. They need no attenuators, directional couplers or charts.

1.Frequency: 0.45 - 2700 MHz. Power: 100 Mw – 10 kW
2.Reads forward and reflected CW or FM power in watts or dBm, Peak Envelope Power of SSB/DSB and 3.symmetrical AM in watts
4.Calculates SWR, return loss in dB and 5 modulation
5.Shock-resistant keyboard and range switches. RFI protection. Buitl-in international power supply/charger Specifications
 

鳥牌功率計探頭選型表

ELEMENT SELECTION GUIDE

Table 14 describes coupler elements used for RF sampling. The instrument meter does not read when these elements are installed, but simply serves as a line section.

ELEMENT TABLE FREQUENCY & POWER LIMITS

TABLE 1— STANDARD ELEMENT

TABLE 2 — LOW-POWER ELEMENTS

TABLE 3 — HIGH-FREQUENCY ELEMENTS, ENTIRE TABLE ±8% FS

TABLE 3A — HIGH FREQUENCY MILLIWATT ELEMENTS

TABLE 4 — LOW-FREQUENCY ELEMENTS

TABLE 6 — MILLIWATT ELEMENTS

TABLE 14— DIRECTIONAL COUPLER ELEMENTS

FOR QC-TYPE OR 7/8" EIA LINE