F October, 2003 1. 2. GENERAL APPENDIX APPENDIX MEASUREMENT PROCEDURE FOR 5.8 GHz 15/28/50 MB N Lite L DIGITAL RADIO SYSTEM (1+0 SYSTEM) This Appendix provides instructions for measuring transmit radio frequency (RF), transmit RF output power, RF occupied bandwidth and bit error rate (BER) at cache station after the system inc-up has been completed. These measurements are optional, so they do not appear in the annual maintenance schedule.
APPENDIX 0] AZ OI-804845 MDP Fig. A-1 Location of Electra Static Protection Terminal Before beginning measurement, notify the opposite station that measurement is about to begin. During measurements, service will be interrupted. After equipment start-up, allow the equipment to warm up for at least 30 minutes.
R OI-S04845 3. TEST EQUIPMENT AND ACCESSORIES APPENDIX The test equipment and special accessories listed in Table 1 are required for system maintenance, If recommended test equipment and accessories are not available, equivalents may be used.
APPENDIX OI-504845 3.1 LCT Connection MDP SIDE LCT CONNECTOR SIGNAL NAME RTS crs DIR GND DSR » RXD ee TXD D-SUB CONNECTOR MODULAR CONNECTOR (9 Pins) Fig. A-2 Cable Pin Assignment Fig.
R OI-S04845 APPENDIX The communication/serial port settings of the personal computer used as local craft terminal (LCT) is listed below.
APPENDIX OI-804845 The cable connector pin assignments are shown in Fig. A-2, The length of the cable between the personal computer and MDP should be less than 15m.
R OI-S04845 4. MEASUREMENT PROCEDURE APPENDIX The general procedures for Loop back, transmit radio frequency (RF), transmit RF output power, RF occupied bandwidth and BER measurement are described below, SOE Oe 0 oO POWER Centennials Cre] 4 Conn) METER | FREQUENCY (REAR VIEW) cow coven | TRE LB spectrum oa ANALYZER | @ No.
APPENDIX OI-804845 4.1 Maintenance Mode AS Procedure Step Procedure 1 Connect the PC to the LCT PORT of the MDP using an RS-232C cable as shown in Fig, A-3, 2 Tum on the power switch on the PC. Then, start the communication software {e.g. Hypertension, 3 Access Login name “Admin” and enter valid password, Young Admin Password : © -— NEC PDH RADIO VER. 0. Logout 1. Alarm f Status 2. Performance Monitor 3. Provisioning Data 4. System Configuration 5. inventory Data &. Relay / House Keeping 7.
ROE-504845 APPENDIX Procedure Step reduce 6 Press the “1” key and “Enter” key, — Maintenance — 1. MAIN Mode (ON} 2. Control 3. Reset CPU 4. Set Calendar 5. Password Setting 6. Program Download Enter Selection : 7 Check that the MAIN Mode turns to ON, 4.2 Transmit Radio Frequency Measurement (a) Test Setup and Accessories Required See Fig. A-4 (CONN 1). (b) Procedure Step Procedure Caution: During measurement, service will be interrupted.
APPENDIX Ad0 R OI-S04845 Procedure Step Price: 6 Press the “6” key and “Enter” key on the Control menu, the following Modulation carrier on/off item is displayed, Off Enter Selection « 1 This will affect the radio link connection. Ase You Sure 7 {YIN}: ¥ Success Hf 7 Press the “1” key and “Enter” key, press the “Y™ key and “Enter” key, then, modulated signal is transmitted, 8 Check that the set up is as shown in Fig.
ROLS04845 APPENDIX 4.3 Transmit RF Output Power Measurement (a) Test Setup and Accessories Required See Fig. A-4 (CONN 2) (b) Procedure Step Procedure Caution: During measurement, service will be interrupted. 1 Set up as in Fig. A4 (CONN'2), Connect the PC to the LCT PORT of the MDF (sce Fig. A-3), Set the MAIN Mode to ON on the PC (refer to para 4.
APPENDIX OI-804845 4.4 RF Occupied Bandwidth Measurement (a) Test Setup and Accessories Required See Fig A-4 (CONN 3) () Procedure Step Procedure Caution: During measurement, service will be interrupted. 1 Set up as in Fig. A-4 (CONN 3), 2 Set functions of the spectrum analyzer as follows: + Bandwidth: 30 kHz (for 100 kHz (for Vertical: 10 dB/div + Horizontal: 5 MHz/div + Frequency: Assigned transmit redo frequency 3 Connect the PC to the LCT PORT of the MDP (sce Fig.
OI-804845 APPENDIX Procedure Press the “Y™* key and “Enter” key, Set the appearance of carrier to the center by turning frequency dial on the spectrum analyzer, Adjust reference level dial on spectrum analyzer so that the CW signal level is set to 0 dB, Repeat Step 5 to 8, and press the “2” key and “Enter” key to set the CW to OFF, Confirm that the displayed spectrum on the spectrum analyzer is within the specified as shown in Fig.
APPENDIX OI-804845 SPECTRAL POWER DENSITY (dB) E75 223 FREQUENCY FROM NOMINAL CARRIER FREQUENCY (MHz) SPECTRAL POWER DENSITY (dB) 225 488 FREQUENCY FROM NOMINAL CARRIER FREQUENCY (Mhz) Fig.
OI-504845 APPENDIX 5. BER MEASUREMENT Perform BER measurement for 1.5 MB main channel in FE loop back between two stations. (BER measurement can not be performed on channels which are assigned to LAN signal.) 5.1 8/16 x 1.5 MB System {a} Test Setup and Accessories Required See Fig, A-5. (b) Procedure Step Procedure Caution: During measurement, service will be interrupted. 1 2 7 Set up the measuring circuit as shown in Fig.
APPENDIX Step Procedure 8 Press the “channel number you want” and “Enter” key, then, the following appears, Han Signal Linebacker (Far End) Loop back Status (CHOC-08) (CH-18) CH Select {CHOC-16) ¢ Notes: 1. indication signifies control off condition. 2. indication signifies control on condition 3. indication signifies restricted channel condition. 4. In case the FE loop back control has been applied from the opposite station, the “Z" is displayed. 5.