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Wavetek STABILOCK 4031 Operating Instructions Manual

Nadc 45 bs-test
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NADC 45 BS-Test
Software Option 897 908
Operating Instructions
43_nad4b Doc. Version: 9512-110-A
10
Acterna Muenchen GmbH, Gutenbergstr. 2 – 4, D-85737 Ismaning
¤
+49 (89) 9 96 41-0
Fax: +49 (89) 9 96 41-160

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  • Page 1 NADC 45 BS-Test Software Option 897 908 Operating Instructions 43_nad4b Doc. Version: 9512-110-A Acterna Muenchen GmbH, Gutenbergstr. 2 – 4, D-85737 Ismaning ¤ +49 (89) 9 96 41-0 Fax: +49 (89) 9 96 41-160...

  • Page 3: Table Of Contents

    NADC 45 BS-Test Contents Introduction ....................10-5 General preparations ................10-6 Loading system program ................ 10-7 General Test Preparations ................10-8 How to Read the "Test Results" Table ............10-9 NADC TX Tests ..................10-11 TX Test Setup ..................... 10-13 Modulation Quality ..................
  • Page 4 NADC 45 BS-Test 10-4...

  • Page 5: Introduction

    Introduction NADC 45 BS-Test Introduction The NADC 45 BS-Test program supports you in RX and TX quality tests on NADC base stations (450 MHz). Precise, numeric measured figures are read out of course. What is new, and indispensable for a fast visual check of performance, is the graphic presentation of the quality parameters of the modulator in the "constellation display".

  • Page 6: General Preparations

    NADC-900-MHz package (248 271). Check procedure Call up the STATUS mask: [AUX] {DEF.PAR} {STATUS} Check the status of the related firmware versions (SOFT- WARE-VERSIONS:) STABILOCK 4031 STABILOCK 4032 ≥ 3j58 ≥ 5.00 HOST-MCU HOST-MCU ≥ 2.58 ≥ 5.00...

  • Page 7: Loading System Program

    Introduction NADC 45 BS-Test Preparation for Enter the following values in the GENERAL PARAMETERS working with mask (Fig. 10.3): channel numbers Channel space 30.0 kHz Duplex space 45.0 MHz Channel 1 No. Corresp. frequ. 440.010 MHz Channel no. ↑ Freq. ↑ Call up the Duplex or RX mask.

  • Page 8: General Test Preparations

    NADC 45 BS-Test General Test Preparations General Test Preparations The following entries in the basic NADC mask are general preparations for the different RX and TX tests (receiver/transmitter). Here they will be looked at separately, but in the individual test procedures they are simply mentioned. The (relevant) values entered in the basic NADC mask will be adopted in the different test masks and vice versa.

  • Page 9: How To Read The "Test Results" Table

    How to Read the "Test Results" Table NADC 45 BS-Test Fig. 10.5: Basic NADC mask with entered Fig. 10.6: Basic NADC mask with entered frequency for TX tests. channel number for TX tests. How to Read the "Test Results" Table Test Results IEEE command for sampling re-...
  • Page 10 NADC 45 BS-Test How to Read the "Test Results" Table 10-10...

  • Page 11: Nadc Tx Tests

    NADC TX Tests 10-11...
  • Page 12 10-12...

  • Page 13: Tx Test Setup

    TX Test Setup NADC 45 BS-Test TX Test Setup Levels of < –110 dBm appear when testing, so the entire setup must be proof against EMI pickup and not radiate any either. The following measures are recommended for this purpose: •...

  • Page 14: Modulation Quality

    NADC 45 BS-Test Modulation Quality Modulation Quality WHY? Test the modulation characteristics of the base station. For this the Communication Test Set offers fast visual judge- ment of modulation quality with the constellation display (graphic presentation of modulation parameters) plus com- prehensive indication of the measured figures on the numeric display (with peak-hold function).
  • Page 15 Modulation Quality NADC 45 BS-Test Test Results RESULt1 Freq.Off. Deviation of base-station transmit frequency from its rating (receive frequency of Communication Test Set). RESULt2 Power Average RF power of base station. (Missing measurement value? See box "No PWR figure?" on page 10-14.) ∆...

  • Page 16: Numeric Display

    NADC 45 BS-Test Modulation Quality Numeric display HOW? Press in the constellation display. {NUMERIC} Select the result mode (see examples): = Results shown are averaged from nine {average} bursts. = Results shown are maximum figures during {max_hold} measuring time (peak-hold function). Inapp- licable for Power result.
  • Page 17 Modulation Quality NADC 45 BS-Test Fig. 10.9: In two result modes {normal} {average} measured figures are updated so fast that exact visual evaluation is barely possible. Result mode solves this problem {max.hold} (display of maximum readings). ATT draws your attention to compensation of cable at- tenuation of Communication Test Set (see "General Test Preparations").

  • Page 18: Modulation Spectrum

    NADC 45 BS-Test Modulation Quality Modulation spectrum WHY? Test whether the modulation spectrum of the base station maintains the permissible levels within the 30-kHz channel spacing (otherwise there is adjacent-channel interference). Requirement Make the general test preparations. HOW? Press in the basic NADC mask. {MOD-SPEC} Select in the scroll field whether the modulation spectrum is to be shown unfiltered (you see the signal on the...

  • Page 19: Adjacent-Channel Power Measurement Acpm

    Adjacent-Channel Power Measurement ACPM NADC 45 BS-Test Adjacent-Channel Power Measurement ACPM WHY? Adjacent-channel power is that part of base-station power which is emitted as noise in each of the six adjacent channels. To avoid adjacent-channel inter- ference, the noise must not exceed a defined value. Requirement Make the general test preparations.
  • Page 20 NADC 45 BS-Test Adjacent-Channel Power Measurement ACPM 10-20...

  • Page 21: Nadc Rx Tests

    NADC RX Tests 10-21...
  • Page 22 10-22...

  • Page 23: Rx Test Setup

    RX Test Setup NADC 45 BS-Test RX Test Setup Standard setup • Use the standard setup shown in Fig. 10.12 if you need a relatively strong RF level for the base-station antenna inputs. This level is available on the RF DIRECT socket of the Communication Test Set. •...

  • Page 24: Bit Error Rate (Ber)

    NADC 45 BS-Test Bit Error Rate (BER) Bit Error Rate (BER) WHY? Bit error rate is a measure of the RF sensitivity of the base station in a digital channel. BER corresponds to an "analog" sensitivity figure refered to a defined sig- nal/noise ratio.
  • Page 25 Bit Error Rate (BER) NADC 45 BS-Test Select RF socket Use the appropriate softkey to select the RF output socket of the test set (see also "RX Test Setup"). The default setting after each callup of the RX BER test mask is RF DIR (this means you see softkey {RF} Set RX frequency...
  • Page 26 NADC 45 BS-Test Bit Error Rate (BER) Set CONT Any binary value is permissible for the continuous bit (recommended value: 1). Enter DATA The data will be transmitted in the traffic channel. You can enter any bit sequence in the DATA field. But, for practical simulation of the real data stream, it is not advisable to enter any regularly repeated passages (this condition is valid for the default entry).
  • Page 27 Bit Error Rate (BER) NADC 45 BS-Test HOW? Enter the test parameters as described. Make sure the relevant RF socket of the Communication Test Set is coupled to the power splitter of the test setup. Start output of the bit sequence with {RUN} Start the BER test program on the PC controller and look for the test result.
  • Page 28 NADC 45 BS-Test Bit Error Rate (BER) 10-28...

  • Page 29: Appendix

    Appendix 10-29...
  • Page 30 NADC 45 BS-Test Bit Error Rate (BER) 10-30...

  • Page 31: Technical Data

    Technical Data NADC 45 BS-Test Technical Data System Bandwidth Number of Boundary Transmitter frequencies (MHz) channels channels Mobile (MHz) Base (MHz) NT-400DR 440.010 485.010 449.970 494.970 Control channels FOCC 21 channels somewhere between channels 206 to 333 (see IS-54; the exact placement of starting control chan- nel is TBD, but should be capable of modification at the time of system activation).

  • Page 32: A Little Nadc Background Information

    NADC 45 BS-Test A Little NADC Background Information A Little NADC Background Information All NADC mobiles are dual mode, meaning that a mobile can use the analog and the digital network. To maintain compatibility with the analog (E)AMPS network, channel spacing is 30 kHz. This results in the requirement to limit the bandwidth of a carrier to ±15 kHz in the modulation spectrum.
  • Page 33 A Little NADC Background Information NADC 45 BS-Test NADC frame and slot structure (mobile to base station) 1 NADC frame = 6 slots = 1944 bits (972 symbols)* = 40 ms Slot 6 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 1...

  • Page 34: Back Panel

    NADC 45 BS-Test Back Panel Back Panel Bu15 Bu90 Bu20 Bu107 Bu108 Bu29 Bu99 Bu104 Bu103 Bu95 S101 Bu105 Bu97 Bu27 Bu12 Bu106 Bu98 Bu13 Fig. 16: Rear panel of the Communication Test Set. You have to connect sockets Bu 103 (IF unit and D-AMPS unit) with the supplied BNC/BNC cable.

  • Page 35: Compatibility With Other Options

    Compatibility with Other Options NADC 45 BS-Test Compatibility with Other Options Equipment configuration required for Slot Unit testing NADC base stations. Slot 2 AF DETECTOR and slot 8 can hold any of the options mentioned. MOD GENERATOR B or OPTION CARD or The following may not be included at CONTROL INTERFACE (A/B/C/D) the same time:...
  • Page 36 NADC 45 BS-Test Compatibility with Other Options Lifeline The chronological lifeline tells you what modifications have been made to the software (SW) and the operating instructions. After a software update the lifeline helps you to find out quickly about all major changes (see code) in the updated operating instructions that are supplied.

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