IYF2CH400-49RR/C Receiver

Due to size constraints, the following information will be included in the user instructions: NOTE: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s authority to operate the equipment.

ENGINEERING STATEMENT IN REGARD TO MEASUREMENTS ON HOBBICO – HOBBY CORPORATION OF AMERICA FCC ID: IYF2CH400-49R Super-Regenerative Receiver A. INTRODUCTION Hyak Laboratories Inc. has been authorized by Hobbico, to perform measurements on a receiver to determine compliance with FCC Rules, Part 15 Subpart B, Para. 15.109. The device is a super-regenerative receiver for toy car remote control. It operates at a nominal 49 MHz frequency. The receiver, constructed on an etched circuit card, is powered by an internal nicad battery. B. DESCRIPTION OF MEASUREMENT PROCEDURE: RADIATED MEASUREMENTS Measurements of receiver radiation field strength were made using ANSI 63.4 (1992) as the test procedure. Measurements were made with 3 meter spacing between the receiver under test and the test equipment antenna. The antenna, permanently connected to the receiver, consisted of a short wire antenna. The receiver under test was placed on a rotatable table approximately 80 cm in height. Measurement of field strength was made through use of HP 8596E and Advantest R3361A spectrum analyzers in conjunction with a HP 8447D wide band, low noise preamp. Eaton Biconical/log periodic calibrated antennas were used as the test antennas in the 25-1000 MHz range. For each spurious emission identified, the test sample was rotated for maximum pickup, the test antenna varied in elevation, and the test antenna polarization shifted between horizontal to vertical in order to maximize observed signals. B. DESCRIPTION OF MEASUREMENT PROCEDURE; RADIATED MEASUREMENTS (Continued) Spurious emissions within the 30 - 1000 MHz band were measured with the receiver cohered and a peak-responding detector employed. Above 1 GHz, the Tektronix 494P spectrum analyzer, a peak-responding instrument, with 1 MHz RBW, and no video filter- ing was used. The measurement procedure included recording the worst-case field strength for receiving antenna polarization, test antenna height variation from 3 feet to 10 feet and test sample rotation. The spectrum was checked from 30 to 2000 MHz. All emis- sions not reported were more than 20 dB below the permitted level or below the applicable limits but obscured by ambient or instru- mentation noise. Tabulation of the measurements are shown in Table 1. The forbidden band frequencies of 15.205 were specifically searched. C. REPORT OF RADIATED MEASUREMENTS Table 1 lists the frequency and amplitude of all signals observed from 30 to 2000 MHz that were within 20 dB of the limits of FCC Rules. 2 TABLE 1 RADIATED SPURIOUS EMISSIONS Measured at 3 meters PART 15(B) PARA. 15.109 Frequency Frequency To Which of Meter Antenna Field 1 Tuned Emission Reading Factor Intensity FCC Limit dB to (MHz) (MHz) (dBm) (dB) uV/m @ 3m uV/m @ 3m Limit 49.860 47.710 -86.0 11.0 40 100 -8.0 49.860 51.510 -85.6 10.6 40 100 -8.0 49.860 53.710 -84.0 9.9 44 100 -7.1 49.860 56.310 -83.6 9.0 42 100 -7.6 Note 1: uV/m = Log -1dBu/m 20 dBu = dBm + antenna factor + 107 All other emissions were 20 dB or more below FCC limits or, for forbidden band, below ambient or instrumentation noise level. Cohered, peak-detector Measured in three planes of orientation. RADIATED FIELD INTENSITY FCC ID: TABLE 1 3 E. FORBIDDEN BAND MEASUREMENTS All forbidden bands of 15.205 from 73 MHz to 2 GHz were searched and any signals above ambient noise or interference levels are shown in Table 1. F. STATEMENT Technical test data are from tests performed by me or under my supervision. My qualifications are a matter of record with the Federal Communications Commission. I personally attest to the accuracy of the test data submitted as a part of this engi- neering statement. __________________________________ Rowland S. Johnson Dated: May 6, 2002 4