Yaesu FT-4XR

FM DUAL BAND TRANSCEIVER

Range: 136-174, 400-480MHz
Antenna Connector: SMA
Power Source: 12.6 VDC Nominal, Battery Operated Exclusively

REPORT SUMMARY

Regulatory Standard	CFR Title 47 FCC Rule part 15B § 15.109, 15.111, & 15.121
Test Procedures	FCC Part 15.31, 15.33, 15.35 ANSI C63.4 – 2014
Operational Modes	Stopped at the Lowest, middle, and highest frequency of tuning range. In addition scanning all frequencies of tuning range
	Low:	136.0, 400 MHz
Test Frequencies	Middle:	154.0, 440 MHz
	High:	174.0, 480 MHz
	Scan:	136.0 – 174.0, 400-480 MHz
Setup	For radiated test the ant terminal was connected to 50ft non radiating load through a 50 Ω coaxial cable
	For conducted test the ant terminal was connected to a EMI receiver through 50 Ω coaxial cable

RADIATED SPURIOUS EMISSIONS

Rule Part No.: FCC Part 15 Subpart B

Requirements: FCC Part 15.109(a) Radiated Emission Limit

FCC Part 15.109(f) Radiated Emission Limit
For a receiver which employs terminals for the connection of an
external receiving antenna, the receiver shall be tested to demonstrate
compliance with the provisions of this section with an antenna
connected to the antenna terminals unless the antenna conducted
power is measured as specified in §15.111(a).

FCC Part 15.33(b)(3) Frequency range of radiated measurements

FCC Part 15.35(a) Measurement detector functions and bandwidths

ANSI C63.4 Methods of Measurement of Radio-Noise Emissions from
Low-Voltage Electrical and Electronic Equipment 9 kHz to 40 GHz

6.2 Operating conditions
§ 6.3 Arrangement of EUT
8.3.1 Exploratory radiated emissions measurements
§ 8.3.2 Final radiated emission measurements

The scanner receiver spurious emissions are to be measured when the
receiver is in the scanning mode and repeated when the scanning is
stopped, all while the antenna terminals are terminated into a non-
radiating 50 Ω load.

YAESU MUSEN CO., LTD.

Antenna

The CDAA Antenna and the Wullenweber

January 30, 2015 in: Antenna No comments

A CDAA of which the Wullenweber is a type, consists of a group of omnidirectional antennas symmetrically spaced about the periphery of a circular reflector screen. The location of each antenna with respect to the screen and to the adjacent... Read more