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Summary of Contents for Wavetek TETRA MS Test
- Page 1 TETRA MS Test Software Option 897 808 Operating Instructions (62_tetra) Doc. Version: 0007-210-A Wavetek Wandel Goltermann, Gutenbergstr. 2 – 4, D-85737 Ismaning +49 (89) 9 96 41-0 Fax: +49 (89) 9 96 41-160...
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Page 3: Table Of Contents
TETRA MS Test Contents Introduction ....................10-5 What TETRA stands for................10-5 What is tested EVERYWHERE? ..............10-6 Measurements possible with TETRA – an overview........10-6 General Preparations ................10-7 Hardware and firmware compatibility ............10-7 Loading system software ................10-8 Test Setup (Connectors)................ - Page 4 TETRA MS Test Appendix ....................10-45 TETRA power levels and power control............10-45 New channel numbering system ..............10-47 Using different TETRA parameter setups ...........10-49 General remarks ..................10-49 Storing a setup in a new file ..............10-49 Storing a setup in an existing file............10-50 Recalling a setup ..................10-50...
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Page 5: Introduction
TETRA, which is π/4 DQPSK. This manual describes the measurements and tests on TETRA mobile stations supported by the TETRA MS Test option to the STABILOCK 4032. Although this option can also be used to test the transmitter of TETRA base stations, there is another option available, TETRA BS Test (software option 897 942), which is far better suited to test TETRA base stations. -
Page 6: What Is Tested Everywhere
TETRA MS Test Introduction What is tested EVERYWHERE? The TETRA MS Test option allows you to • perform transmitter tests on TETRA mobile stations as well as base stations. • stimulate the TETRA mobile receiver with a T1 (standard TETRA test) signal. -
Page 7: General Preparations
General Preparations TETRA MS Test General Preparations Hardware and firmware compatibility Normally, if you ordered a new system or an upgrade to TETRA, you get your STABILOCK with all the necessary hardware and firmware installed. If this is the case, you can skip this section and proceed to Loading System Software. -
Page 8: Loading System Software
TETRA MS Test General Preparations Loading system software The TETRA MS Test system program is supplied on a memory card. 1) Insert the memory card in the slot on the STABILOCK. 2) Press to start the loading procedure, which may take about a... -
Page 9: Test Setup (Connectors)
General Preparations TETRA MS Test Test Setup (Connectors) Levels of less than –110 dBm may appear when testing (eg receiver measure- ments), so the entire setup must be proof against EMI pickup and not radiate any either. The following measures are recommended for this purpose: •... -
Page 10: Parameters
TETRA MS Test Parameters Parameters This section acquaints you with the most important parameters that you need to set up prior to a test. " Remember that if you leave the memory card in the memcard slot of the STABILOCK, the parameters are written onto the card so they are re-loaded automatically to the STABILOCK next time you load the system software. - Page 11 Parameters TETRA MS Test The Mobile Country Code of the simulated system. It is important to use the MCC of the home system of the mobile station under test. Some examples of valid MCCs are listed in section "MCC codes" in the appendix.
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Page 12: Basic Parameters In Def.set
TETRA MS Test Parameters Basic parameters in DEF.SET When you press from the TETRA basic mask, the display changes to {DEF.SET} the TETRA SETTINGS menu. Some parameters available there depend on the system for which the TETRA mobile station under test is programmed, other parameters allow you to select according to your personal preferences. - Page 13 Parameters TETRA MS Test Example: If Channel 0 TX Frequency is 380.0000 MHz, Lower Band is selected, Duplex is set to 10 MHz and the traffic channel number is 2, then the STABILOCK expects the equipment under test to transmit at 380.050 MHz and to receive the STABILOCK signal...
- Page 14 TETRA MS Test Parameters Measurements or Trace The default setting, Measurement, allows you to perform measurements, either in synchronous (call) mode or asynchronous (measure) mode. If you change this scroll field to Sign.Trace instead, no measurements are available but normal call proce- dures can be made.
- Page 15 Parameters TETRA MS Test Fig. 10.5: The figure shows where the input values take effect. If the measured curve is within the template, the display shows "PASS" on the lower right side, otherwise it indicates a "FAIL". The different parts of the template are expressed in their time/power coordinates;...
- Page 16 The power limits are taken from the very first row where the mobile station is expected to be in the same power-off state. " In order to get back to the values pre-programmed by Wavetek, press {DEF.CP} (default corner points). The factory settings are then restored, see figure 10.6.
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Page 17: Sysinfo Parameters In Def.set
Parameters TETRA MS Test SYSINFO parameters in DEF.SET The STABILOCK allows the TETRA mobile phone to register and set up calls. It does this by simulating a network, in particular by sending a main control channel with typical broadcast messages on the Synchronization Channel and the Broadcast Network Channel BNCH (D-MLE-SYSINFO). - Page 18 TETRA MS Test Parameters The Waiting Time parameter indicates to the mobile station how long it may have to wait for response from the network. The valid entries are in the range from 0 to 15. This parameter defines the allowable Number of random access transmissions on uplink, which can be in the range from 0 to 15.
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Page 19: Modes Of Operation
TETRA MS Test Modes of operation The TETRA MS Test option supports four different modes of operation – trans- mitter measurements in asynchronous mode, T1 bit pattern generation and paging sensitivity search function for receiver tests, measurements in call mode, and the protocol trace. -
Page 20: Measurements On A Base Station
If you want to make a few transmitter tests on a base station, this section gives you some hints how to set up the STABILOCK with the TETRA MS Test option. For more comprehensive testing, including receiver tests and synchronization with the base station, the TETRA BS Test option is recommended. -
Page 21: T1: The T1 Generator
Modes of operation TETRA MS Test T1: The T1 generator This is a mode of operation in which the mobile station reads a signal with a special data format (called "T1 signal") from the test equipment; the signal allows the MS to synchronize with the test equipment. The signal can be used to perform receiver measurements, assuming the data received in the mobile are evaluated by the mobile itself or forwarded to an external PRBS analyzer. -
Page 22: Register: Setting Up A Call
TETRA MS Test Modes of operation REGISTER: Setting up a call Compared to the asynchronous (Measure) mode, there is an extended set of tests available using the TETRA protocol eg to register the mobile station with a virtual network (ie simulated by the STABILOCK) and to set up a call. -
Page 23: Registration (Location Update Procedure)
Modes of operation TETRA MS Test Registration (Location Update procedure) Why? Start the base station simulation in the STABILOCK. Test whether the mobile station can receive and decode the base station signal. Check whether the mobile station registers with the (simulated) base station properly. -
Page 24: Call From Mobile Station
TETRA MS Test Modes of operation Call from mobile station Why? See if the mobile station can originate a call. Proper call setup is a requirement for further tests. Requirements Mobile station is registered ("idle updated") and not in a call. -
Page 25: Call From Base Station
Modes of operation TETRA MS Test Call from base station Why? See if the mobile station can receive a call. Proper call setup is a requirement for further tests. Requirements Mobile station is registered ("idle updated") and not in a call. -
Page 26: Paging Sensitivity Search Function
TETRA MS Test Modes of operation Paging sensitivity search function Why? See if the receiver sensitivity of the mobile station is good enough. For all cases where you do not have access to the BER values calculated inside the mobile station. -
Page 27: Call Cleardown
Modes of operation TETRA MS Test Call cleardown Why? Stop measurements on this mobile station. Requirements Mobile station is on traffic channel ( {MS_Call} {BS_Call} pressed before). Screen shows basic test mask. How? Release the PTT if applicable. Press the DISCONNECT key on the mobile. -
Page 28: Trace: Protocol Display
TETRA MS Test Modes of operation TRACE: Protocol display This mode allows for an offline trace of the protocol (signalling) between the STABILOCK and the MS. The STABILOCK has some built-in sequences that are required to register the MS with the network, set up a call, and to release the channel after the test. - Page 29 Modes of operation TETRA MS Test Once that you do not want to perform any new procedure but want to view the signalling exchange up to this point, push the key. The trace display {TRACE} appears with a time stamp of each message, the direction (D for downlink, ie the message is sent by the STABILOCK, or U for uplink), and the name of the message.
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Page 30: Measurements
TETRA MS Test Measurements Measurements This section explains the basic TETRA measurements that are supported in the STABILOCK, in both asynchronous (Measure) and call mode. Where a measure- ment applies to call mode only, this is indicated. Measurements under remote control Measurements can be controlled either manually, or by AUTORUN programs or through the GPIB (IEEE-488 bus). -
Page 31: Quality Measurements From The Basic Mask
Measurements TETRA MS Test Quality measurements from the basic mask Fig. 10.18: In call mode, quality measurements are fre- quently updated on the right-hand side of the screen. More results are available using the softkeys. Finally, the call can be finished using the Release softkey. - Page 32 TETRA MS Test Measurements This is the peak value of the 0.300 Peak vector vector error from all symbols err. over the whole burst or period. ±0.25 symbol periods Frame alignment Normally, the mobile station tunes its timing to the one it receives from the base station.
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Page 33: Power Versus Time
Measurements TETRA MS Test Power versus time Why? Visual assessment of the burst. Measurement of transmit power during the burst. Test whether the mobile ramps up and down correctly at the burst edges. Requirements Quality measurements must have been started, either... - Page 34 TETRA MS Test Measurements " Half-slot bursts can only be measured if no full-slot bursts occur. The first burst received after starting a measurement determines the type of burst expected in all subsequent measurements. Test results under remote control IEEE Command...
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Page 35: Constellation Display
Measurements TETRA MS Test Constellation display Why? Test the modulation characteristics of the mobile. For this purpose, the test set offers fast visual judgement of the modulation quality with the constellation display (graphical representation of the modulation quality) plus comprehensive indication of the measured figures on the numerical display. -
Page 36: Available Display Modes
TETRA MS Test Measurements Available display modes DOTS, the points of maximum effect (POMEs) are shown for one timeslot. This display, for a well adjusted transmitter, shows eight tightly limited accumulations of dots, offset by 45°. Before the points from a new measurement (next burst or timeslot) are displayed, the recent results are deleted. -
Page 37: Modulation Spectrum
Measurements TETRA MS Test Modulation spectrum Why? Test whether the modulation spectrum of the mobile main- tains the permissible levels within the 25 kHz channel spacing (otherwise there is adjacent channel interference). Requirements Quality measurements must have been started, either by pressing MEASURE or by pressing one of the CALL keys. -
Page 38: Statistical Evaluation (Min-Max)
TETRA MS Test Measurements Statistical evaluation (Min-Max) Why? Read the average value of measurement results. Identify short-term deviations. Requirements Quality measurements must have been started, either by pressing MEASURE or by pressing one of the CALL keys. How? Press key. - Page 39 Measurements TETRA MS Test Test results under remote control IEEE Command String position Result a = TX power (incl. dimension) RESULt1 12345678901234567890 b = Freq. error (Hz) aaaaaaaaa;bbbbb;**** * = Reserved a = Residual carrier power (%) RESULt2 12345678901234567890 b = RMS vector error aaaaa;bbbbb;ccccc;**...
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Page 40: Af (Speech) Loopback
TETRA MS Test Measurements AF (speech) loopback Why? Provides an overall check of all components of the MS, including the microphone and loudspeaker, while the mobile station is transmitting on a traffic channel. Requirements Mobile station is on traffic channel (... -
Page 41: Af Signal Generator And Voltmeter Access
Measurements TETRA MS Test AF signal generator and voltmeter access Why? Some parts, eg the microphone and loudspeaker, may require adjustments based on analog AF signals and respective measurements while the mobile station is transmitting on a traffic channel. Requirements... -
Page 42: Troubleshooting
TETRA MS Test Troubleshooting Troubleshooting Problem Solution MEASURE mode: a) No signal is available at the connector. Check if No results! the signal is applied to the same connector as indicated in the DEF.SET menu (RF or RF-DIR). b) The signal source is on a different frequency than expected. -
Page 43: Rs-232-C Interface
" Do not start the TETRA MS Test system program: the RS-232-C interface of the D-AMPS module will not work properly if the TETRA MS Test system program is called up at the same time. -
Page 44: Pinning Of Rs-232-C Interface
TETRA MS Test RS-232-C interface Pinning of RS-232-C interface Bu 105 Pin 1 = Pin 5 = Pin 2 = Pin 6 = Pin 3 = Pin 7 = Pin 4 = Pin 8 = Pin 9 = 10-44... -
Page 45: Appendix
Appendix TETRA MS Test Appendix TETRA power levels and power control Each TETRA MS belongs to a power class, which defines the maximum RF output power capability. In addition, the MS is capable of adapting its power level in 5-dB steps to the external requirements. Two mechanisms are available: Open loop and closed loop power control. - Page 46 TETRA MS Test Appendix The following tables list the power classes and power levels of a TETRA MS: MS power step Power class 1 Power class 2 Power class 3 Power class 4 level (30 W) (10 W) (3 W)
- Page 47 Appendix TETRA MS Test New channel numbering system Edition 2 of the radio interface standard ETS 300 392-2 defines how values for the frequency band, duplex spacing and channel number parameters are as- signed (see Annex F of the afore-mentioned standard). This definition makes a difference between the radio channel number and the carrier number.
- Page 48 TETRA MS Test Appendix Example 1: The uplink TX frequency is 410.025 MHz, the duplex spacing is 10 MHz. This means that the downlink TX frequency is 420.025 MHz. The above formulae lead to the following values: Channel 0 TX Frequency = 390.0000 MHz...
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Page 49: Using Different Tetra Parameter Setups
The setup file has to be stored on a memory card for user data, not on a System Card. The memory card holding the TETRA MS Test software is such a system card, so it cannot be used for setups. A different memory card, such as the card that has been delivered with the STABILOCK as a standard accessory, should be used. -
Page 50: Storing A Setup In An Existing File
TETRA MS Test Appendix Storing a setup in an existing file 1) Within the system option (TETRA MS Test), set the parameters as you want to store them. 2) Insert the memory card for your user data. 3) Call up the MEMORY mask with {MEMORY} 4) Move the cursor bar to an existing TETRA-MS.SYD file from the file list. -
Page 51: What Is Tetra Anyway
Appendix TETRA MS Test What is TETRA anyway? TETRA is a wireless communication standard for Professional Mobile Radio (PMR) and Private Access Mobile Radio (PAMR) applications, eg for public safety organizations. Fast call setup times, closed user groups rather than calls into the public switched telephone network, and group calls are some of the features that make TETRA different from standards for public use like GSM. - Page 52 TETRA MS Test Appendix as four different calls on one 25 kHz carrier frequency (One channel within the system must carry the Main Control Channel, referenced here as the Base channel). Speech is digitized and compressed into less than 4.6 kbit/s. Data channels support up to 7.2 kbit/s;...
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Page 53: Mcc Codes
Appendix TETRA MS Test Other parameters that must lie within their respective limits are residual carrier power and, of course, the frequency error and the RF power. The residual carrier power is the I and Q imbalance of the modulator. In the figure above, it would mean that the circle is not around the coordinate origin but slightly shifted. -
Page 54: Connectors On The Rear
This section explains what they can be used for. " Not all of these signals are available all the time. If you require some of them and you do not find them operational, please contact Wavetek for a special application software. Socket Signal Dir. - Page 55 Appendix TETRA MS Test Timeline The chronological timeline tells you what modifications have been made to the software (SW) and the operating instructions. After a software update the timeline helps you to find out quickly about all major changes (see code) in the updated operating instructions that are supplied.
- Page 56 TETRA MS Test Appendix 10-56...