MEASUREMENT/TECHNICAL REPORT
Hyundai Electronics Industries Co., Ltd.
MODEL: IM765A
This report concerns: Original grant ✗ Class change
Equipment type: MONITOR
Deferred grant requested per 47 CFR 0.457(d)(1)? yes [ ] no [X]
Transition Rules Request per 15.37? yes [ ] no [X]
If no, assumed Part 15, Subpart B for unintentional radiators - the new 47 CFR [10-1-91 Edition] provision.
Report prepared by: BONG JAE, HUR - Manager of QA Office
Company: HYUNDAI ELECTRONICS INDUSTRIES CO., LTD.
Address: SAN 136-1, AMI-RI, BUBAL-EUB, ICHON-SI, KYOUNGKI-DO, KOREA
Phone No: 82-336-630-3280
Fax No: 82-336-630-3265
1. GENERAL INFORMATION
1.1 Product Description
The Hyundai Electronics Industries Co., Ltd. Model P790 (referred to as the EUT in this report) is a 17" COLOR Monitor with a Horizontal Frequency of 93.5kHz and a maximum Resolution of 1600x1200 Non-Interlaced. Product specification information was obtained from the product data sheet or user's manual.
| CHASSIS TYPE | PLASTIC |
|---|---|
| LIST OF EACH OSC. OR XTAL. FREQ.(FREQ. ≥ 1MHz) | 6 MHz |
| CHIPSET BRAND AND PART NO. | SAMSUNG : KA358 SAMSUNG : KA3842B MOTOROLA : MC13282EP MOTOROLA : MC141545P2A MOTOROLA : MC68HC705BD981 SGS TOMSON : TDA9111 SGS TOMSON : TDA9302H ATMEL: 706 CALOGIC: CAV1404T |
| POWER REQUIREMENT | 100 - 240 VAC 1.8A 50/60 Hz |
| NUMBER OF LAYERS | MAIN BOARD 1 LAYER CRT SOCKET BOARD 2 LAYER |
| MAX. RESOLUTION | 1280 X 1024 NON-INTERLACED (@ 64 kHz/60Hz) |
| H-SYNC FREQUENCY RANGE | 30 kHz - 70kHz |
| V-SYNC FREQUENCY RANGE | 50 Hz - 150 Hz |
| CRT SIZE | 17" (LG / Type : M41LFQ803X16) |
| VIDEO CONNECTOR TYPE | D-SUB 15-PIN |
1.2 Related Submittal(s) / Grant(s)
ORIGINAL SUBMITTAL ONLY
1.3 Tested System Details
The Model names for all equipment, plus descriptions used in the tested system (including inserted cards) are:
| DEVICE TYPE | MANUFACTURER | MODEL NUMBER | FCC ID / DoC | CONNECTED TO |
|---|---|---|---|---|
| COLOR MONITOR(EUT) | IMRI | IM765A | OMNIM765A | HOST |
| PC(HOST) | H/P | HP VECTRA 500 | DoC | N/A |
| KEYBOARD | H/P | SK-2501-2D-K | DZL211029 | HOST |
| PRINTER | H/P | C2168A | B94C2121X | HOST |
| MODEM | HYUNDAI | HMD-2404M | CKL8J7HMD-2404M | HOST |
| VIDEO CARD | TNC Chemical | 2 THE MAX | JDF-765PCI-001 | HOST |
| MOUSE | H/P | M-S34 | GYUR38SK | HOST |
1.4 Test Methodology
Both conducted and radiated testing were performed according to the procedures in ANSI C63.4/1992. Radiated testing was performed at an antenna to EUT distance of 3 meters.
1.5 Test Facility
The open area test site and conducted measurement facility used to collect the radiated data are located at 254-1, MAEKOK-RI, HOBUP-MYUN, ICHON-SI, KYOUNGKI-DO, 467-701, KOREA. The site is constructed in conformance with the requirements of ANSI C63.4 and CISPR Publication 22. Detailed description of test facility was submitted to the Commission on May 22, 1997 and accepted dated July 25, 1997 (1300F2).
2. SYSTEM TEST CONFIGURATION
2.1 Justification
The device was configured for testing in a typical fashion (as a customer would normally use it). During the tests, the following components and I/O cards inside the E.U.T were used.
| DEVICE TYPE | MANUFACTURE | MODEL/PART NUMBER |
|---|---|---|
| MAIN BOARD | IMRI CO.,LTD. | IM76 |
| CRT SOCKET BOARD | IMRI CO.,LTD. | IM76 |
2.2 EUT exercise Software
The EUT exercise program used during radiated and conducted testing was designed to exercise the various system components in a manner similar to a typical use. The software, contained on a 3-1/2 inch disc, was inserted into drive A and auto-starts on power-up. Once loaded, the program sequentially exercises each system component in turn. The sequence used is: (1) Display test, (2) RS 232 test, (3) Keyboard test, (4) Printer test, (5) FDD test, (6) HDD test. The complete cycle takes about 20 seconds and is repeated continuously. As the keyboard and mouse are strictly input devices, no data is transmitted to them during test. They are, however, continuously scanned for data input activity. The video resolution modes setup and change program was used during the radiated and conducted emission testing.
2. SYSTEM TEST CONFIGURATION (Continued)
2.3 Cable Description
| DEVICE | Power Cord Shielded (Y/N) | I/O Cable Shielded (Y/N) | Length (M) |
|---|---|---|---|
| PC(HOST) | N | N/A | 1.5(P) |
| COLOR MONITOR(EUT) | N | Y | 1.5(P), 1.5(D) |
| PARALLEL | N | Y | 1.5(P), 1.5(D) |
| KEYBOARD | N/A | Y | 1.0(D) |
| SERIAL | N | Y | 1.5(P), 1.5(D) |
| MOUSE(PS/2) | N/A | Y | 1.8(D) |
The marked "(D)" means the Data Cable and "(P)" means the Power Cable.
2.4 Noise Suppression Parts on Cable
| DEVICE | Ferrite Bead (Y/N) | Location | Metal Hood (Y/N) | Location |
|---|---|---|---|---|
| PC(HOST) | N | N/A | N | N/A |
| COLOR MONITOR(EUT) | Y | PC END | Y | PC END |
| KEYBOARD | Y | PC END | Y | PC END |
| PARALLEL | N | N/A | Y | BOTH END |
| SERIAL | N | N/A | Y | BOTH END |
| MOUSE(PS/2) | N | N/A | Y | PC END |
2. SYSTEM TEST CONFIGURATION (Continued)
2.5 Equipment Modifications
N/A
2. SYSTEM TEST CONFIGURATION (Continued)
2.6 Configuration of Test System
Line Conducted Test: EUT was connected to LISN, all other supporting equipment were connected to another LISN. Preliminary Power line Conducted Emission tests were performed using the procedure in ANSI C63.4/1992 7.2.3 to determine the worse operating conditions.
Radiated Emission Test: Preliminary Radiated Emissions tests were conducted using the procedure in ANSI C63.4/1992 8.3.1.1 to determine the worse operating condition. Final Radiated Emission tests were conducted at a 3-meter open area test site.
[Configuration of Tested System]
The system configuration consists of the IM765A (EUT) connected to a PC (HOST) labeled HP VECTRA 500. Also connected are a MODEM labeled HMD-2404M, a PRINTER labeled C2168A, a KEYBOARD labeled SK-2501-2D-K, and a MOUSE labeled M-S34.
3. PRELIMINARY TESTS
3.1 AC Power line Conducted Emission Tests
During Preliminary Tests, the following operating modes were investigated:
| Processor Speed (MHz) | Video Resolution (w/max) | The worst operating condition |
|---|---|---|
| Pentium 75 MHz | 1280 x 1024 Non-Interlaced (64 kHz/60Hz) | |
| Pentium 75 MHz | 1024 x 768 Non-Interlaced (68.7 kHz/85Hz) | X |
| Pentium 75 MHz | 800 x 600 Non-Interlaced (53.6 KHz/85Hz) | |
| Pentium 75 MHz | 640 x 480 Non-Interlaced (43.2 KHz/85Hz) |
3.2 Radiated Emission Tests
During Preliminary Tests, the following operating modes were investigated:
| Processor Speed (MHz) | Video Resolution (w/max) | The worst operating condition |
|---|---|---|
| Pentium 75 MHz | 1280 x 1024 Non-Interlaced (64 kHz/60Hz) | |
| Pentium 75 MHz | 1024 x 768 Non-Interlaced (68.7 kHz/85Hz) | X |
| Pentium 75 MHz | 800 x 600 Non-Interlaced (53.6 KHz/85Hz) | |
| Pentium 75 MHz | 640 x 480 Non-Interlaced (43.2 KHz/85Hz) |
NOTE: The monitor (EUT) has two (2) video interface ports (VGA 15pin D-sub, 5 BNC) to support various kinds of graphics adapters. The tests were performed with each video interface port. The final measurement was performed with the VGA 15pin D-sub video interface port that produced the worst-case emission.
Tested by: Sang Jun, Lee Date: JULY 2, 1999
4. FINAL CONDUCTED AND RADIATED EMISSION TESTS SUMMARY
4.1 Conducted Emissions Tests
The following table shows the highest levels of conducted emissions on both polarization of hot and neutral line.
Humidity Level: 26% Temperature: 24°C
Limit apply to: FCC CFR 47, PART 15, SUBPART B
Type of Tests: CLASS B
Date: JULY. 8, 1999
Result: PASSED BY 4.0 dB
EUT: 17" COLOR MONITOR
Operating Condition: 1024 X 768 Non-Interlaced (Hf: 68.7KHz, Vf: 85Hz)
Detector: CISPR Quasi-Peak (6 dB Bandwidth: 9 KHz)
| Frequency (MHz) | Amplitude (dBuV) | Conductor | FCC Class B Limit (dBuv) | Margin (dB) |
|---|---|---|---|---|
| 0.4819 | 40.5 | HOT | 48 | -7.5 |
| 3.5154 | 41.9 | HOT | 48 | -6.1 |
| 18.9600 | 40.2 | HOT | 48 | -7.8 |
| 22.8900 | 38.8 | HOT | 48 | -9.2 |
| 24.1300 | 39.4 | HOT | 48 | -8.6 |
| 25.4400 | 38.9 | HOT | 48 | -9.1 |
| 28.470 | 44.0 | HOT | 48 | -4.0 |
NOTE:
1. All video modes and resolutions were investigated and the worst-case emissions are reported. Other video modes & resolution were tested and found to be in compliance.
2. The limit for Class B device is 250 uV from 450 kHz to 30 MHz.
Measured by: Sang Jun, Lee / Engineer
4. FINAL CONDUCTED AND RADIATED EMISSION TESTS SUMMARY (Continued)
4.2 Radiated Emissions Tests
The following table shows the highest levels of Radiated Emissions on both polarization of horizontal and vertical.
Humidity Level: 22% Temperature: 28°C
Limit apply to: FCC CFR 47, PART 15, SUBPART B
Type of Tests: CLASS B
Date: JULY. 8, 1999
Result: PASSED BY 6.0 dB
EUT: 17" COLOR MONITOR
Operating Condition: 1024 X 768 Non-Interlaced (Hf: 68.7 KHz, Vf: 85 Hz)
Detector: CISPR Quasi-Peak (6 dB Bandwidth: 120 KHz)
| Freq. (MHz) | Ampl. (dBuV) | Ant. Pol. | Correction Factors Antenna & Cable Loss (dB/m) | Total Ampl. (dBuV/m) | FCC Class B Limit (dBuV/m) | Margin (dB) |
|---|---|---|---|---|---|---|
| 31.5 | 12.1 | V | 17.9 | 30.0 | 40.0 | -10.0 |
| 39.3 | 15.2 | V | 15.2 | 30.4 | 40.0 | -9.6 |
| 47.2 | 18.0 | V | 13.0 | 31.0 | 40.0 | -9.0 |
| 55.1 | 20.9 | V | 10.6 | 31.5 | 40.0 | -8.5 |
| 63.0 | 24.0 | V | 8.4 | 32.4 | 40.0 | -7.6 |
| 70.8 | 27.2 | V | 6.8 | 34.0 | 40.0 | -6.0 |
| 78.1 | 25.4 | V | 7.3 | 32.7 | 40.0 | -7.3 |
| 78.7 | 23.3 | V | 7.5 | 30.8 | 40.0 | -9.2 |
| 86.6 | 21.5 | V | 9.1 | 30.6 | 40.0 | -9.4 |
| 94.5 | 20.9 | V | 10.5 | 31.4 | 43.5 | -12.1 |
| 141.7 | 15.9 | H | 15.9 | 31.8 | 43.5 | -11.7 |
| 173.3 | 13.8 | H | 18.2 | 32.0 | 43.5 | -11.5 |
| 181.1 | 14.0 | V | 18.7 | 32.7 | 43.5 | -10.8 |
| 196.9 | 12.4 | V | 19.6 | 32.0 | 43.5 | -11.5 |
| 204.8 | 11.9 | V | 19.7 | 31.6 | 43.5 | -11.9 |
| 291.4 | 10.6 | V | 21.8 | 32.4 | 46.0 | -13.6 |
NOTE:
1. All video modes and resolutions were investigated and the worst-case emissions are reported.
2. Other video modes & resolution were tested and found to be in compliance.
Measured by: Sang Jun, Lee / Engineer
5. FIELD STRENGTH CALCULATION
The field strength is calculated by adding the Antenna Factor and Cable Factor. The basic equation with a sample calculation is as follows:
FS = RA + AF + CF
where FS = Field Strength
RA = Receiver Amplitude
AF = Antenna Factor
CF = Cable Attenuation Factor
Assume a receiver reading of 21.5 dBuV is obtained. The Antenna Factor of 7.4 and a Cable Factor of 1.1 is added. The 30 dBuV/m value was mathematically converted to its corresponding level in uV/m.
FS = 21.5 + 7.4 + 1.1 = 30 dBuV/m
Level in uV/m = Common Antilogarithm [(30 dBuV/m)/20] = 31.6 uV/m
