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GSM/GPRS/EDGE SIGNAL ANALYZER

JD7105B Base Station Analyzer

SING

GSM/GPRS/EDGE

IGNAL

NALYZER

The Global System for Mobile Communications (GSM) is a digital cellular standard that uses Time

Division Multiple Access (TDMA) multiplexing scheme and Gaussian Minimum Shift Keying (GMSK)

modulation. The Enhanced Data Rates for GSM Evolution (EDGE) is an enhancement to GSM that

promises to deliver true 3G wireless services such as multimedia and other broadband applications. It

uses TDMA and 3π/8 8PSK (phase shift keying) modulation

The JD7105B performs measurements using the methods and limits as defined in the 3GPP TS

51.021 Base Station System (BSS) equipment specification: Radio Aspects V8.9.0 (2003-06). The

Pass/Fail indictor helps the user to determine base station performance easily.

The JD7105B provides the following analysis tools for GSM/GPRS/EDGE system.



Spectrum Analysis



RF Analysis



Channel Power



Occupied Bandwidth



Spectrum Emission Mask



Spurious Emissions



Power vs Time



Slot



Frame



Constellation



Over The Air (OTA)



Channel Scanner



Frequency Scanner



Multipath Profile



Modulation Analyzer



Auto Measure

Summary of Contents for JD7105B

Page 1: ...ir measurement In this Chapter Using GSM GPRS EDGE Signal Analyzer 4 Display Overview 5 Connecting a Cable 7 Direct Connection 7 Indirect Connection 7 Over The Air OTA 8 Spectrum Analysis Measurement...

Page 2: ...Setting External Clock 42 Measurement Procedure 43 Setting Limit 44 Measurement Example 46 Constellation Measurement 47 Setting Mode 47 Setting Frequency 47 Setting Amplitude 48 Setting Averaging 49...

Page 3: ...etting Zoom Position 66 Measurement Procedure 66 Measurement Example 67 GSM OTA Multipath Profile 68 Setting Mode 68 Measurement Procedure 68 Measurement Example 69 GSM OTA Modulation Analyzer 71 Sett...

Page 4: ...and applications It uses TDMA and 3 8 8PSK phase shift keying modulation The JD7105B performs measurements using the methods and limits as defined in the 3GPP TS 51 021 Base Station System BSS equipme...

Page 5: ...nal offset Reference setting information Frequency Trigger Measurement Setting Information Spectrum Analyzer Operation Mode Information Displays the operation mode of spectrum analyzer Sweep or FFT De...

Page 6: ...to 6 markers Screen Menu Title Screen Menu and Sub menu Scale Unit Information dBm dBmV dBuV V and W User Input Window Activates when user input menu or key is selected Pressing PREV hard key will ca...

Page 7: ...ection Monitor Port and RF In Port Connection The maximum power for the Spectrum Analyzer RF In 50 port is 30 dBm 1 Watt If the input signal level to be measured is greater than 30 dBm use a High Powe...

Page 8: ...imum power for the Spectrum Analyzer RF In 50 port is 30 dBm 1 Watt If the input signal level to be measured is greater than 30 dBm use a High Power Attenuator to prevent damage when you directly conn...

Page 9: ...or Channel Number Enter a value Forward or Reverse Press the FREQ DIST hard key Press the Center Frequency soft key Use the numeric keys the rotary knob or the arrow keys When using the numeric keys...

Page 10: ...g step size of the Channel Number when using the rotary knob or the arrow keys The step size can be entered by using numeric keys and the Enter soft key CHANNEL STANDARD When the channel standard is s...

Page 11: ...nce level changes according to the change of the attenuator s value but the attenuator s value does not change when the reference level is changed If the input signal level is higher than 30 dBm or hi...

Page 12: ...er 1 key in the numeric keypad Press the Sweep Mode soft key Toggle between Continue and Single Setting Trace and Display TRACE DISPLAY SELECT TRACE Selects an active trace from T1 to T6 Trace numbers...

Page 13: ...isplay screen CAPTURE Captures a current trace on the display screen with the selected trace number TRACE VIEW Displays the trace of the selected trace number on the display screen or hides it from th...

Page 14: ...ber between 1 and 6 DELTA This Delta marker type is associated with a Normal marker A Normal marker must be set before a Delta marker is set When the Delta marker is set the position set by the Delta...

Page 15: ...es the active marker to the second highest peak of the trace NEXT PEAK RIGHT Moves the active marker to the highest peak to the right of its current position NEXT PEAK LEFT Moves the active marker to...

Page 16: ...uency FREQ DIST Center Frequency Enter a value GHz MHz kHz or Hz or Channel Number Enter a value Forward or Reverse Press the FREQ DIST hard key Press the Center Frequency soft key Use the numeric key...

Page 17: ...TEP Defines the moving step size of the Channel Number when using the rotary knob or the arrow keys The step size can be entered by using numeric keys and the Enter soft key CHANNEL STANDARD When the...

Page 18: ...nce level changes according to the change of the attenuator s value but the attenuator s value does not change when the reference level is changed If the input signal level is higher than 30 dBm or hi...

Page 19: ...is the number 1 key in the numeric keypad Press the Sweep Mode soft key Toggle between Continue and Single Setting Trigger Source TRIGGER This hot key is used to select the trigger source among RF Bu...

Page 20: ...is relative to the peak of the signal RF Burst is also known as RF Envelope INTERNAL FB FREE BURST Sets the trigger level to FB if there is a frequency burst signal RF BURST TS TRAINING SEQUENCE Sets...

Page 21: ...ge power level above the threshold is then computed and displayed Measurement Procedure Step Description 1 Connect the cable Connect the cable to the Spectrum Analyzer RF In 50 port of the JD7105B and...

Page 22: ...or ENTER Press the Test Limits soft key to toggle between On and Off and select one Press the High Limit soft key to set the upper limit of the Pass Fail criteria Use the numeric keys to input value...

Page 23: ...r s X and Y coordinates may be slightly different for each measurement mode and refer to the description of each measurement There are three different marker types available Normal Delta and Delta pai...

Page 24: ...e position of the Normal marker and the marker s X and Y values displays the difference compared with the Delta Pair marker The reference position will be varied in accordance with trace change MARKER...

Page 25: ...alue uSec or ENTER RX Filter No Filter 100K 200K 400K Default or 624K Press the MEASURE SETUP hard key Press the Delay soft key to set the delay Use the numeric keys to input value Press the unit soft...

Page 26: ...ct one Press the High Limit soft key to set the upper limit of the Pass Fail criteria Use the numeric keys to input value Press the unit soft key to select 3 Enable beep LIMIT Beep On or Off Press the...

Page 27: ...position can be set manually by entering numeric values frequency when one of the marker types is selected SELECT MARKER Selects an active marker whose position can be changed with the rotary knob or...

Page 28: ...strument displays those markers back at the previous position If a measurement mode is changed current settings are not restored MARKER Sets the X coordinate of the active marker as selected MARKER CE...

Page 29: ...elect the Signal Analyzer mode Press the GSM soft key Press the RF Analysis soft key Press the Spectrum Emission Mask soft key 3 Set the measurement parameters MEASURE SETUP Delay Enter a value uSec o...

Page 30: ...rum Emission Mask Press the LIMIT hot key It is the number 7 key in the numeric keypad Press the RF Test Limits soft key Press the Spectrum Emission Mask soft key 2 Set the limit Test Limits On or Off...

Page 31: ...er position can be set manually by entering numeric values frequency when one of the marker types is selected SELECT MARKER Selects an active marker whose position can be changed with the rotary knob...

Page 32: ...d in accordance with trace change MARKER ALL OFF Turns all the markers the screen off When the Marker View is selected for those markers the instrument displays those markers back at the previous posi...

Page 33: ...er mode Press the GSM soft key Press the RF Analysis soft key Press the Spurious Emissions soft key 3 Set the measurement parameters MEASURE SETUP Range Table Range Enter a value Enter Start Frequency...

Page 34: ...for the selected range number in the Range menu Use the numeric keys to enter a value and press one of the unit soft keys STOP FREQUENCY Sets or changes the stop frequency value to be measured for the...

Page 35: ...ot key It is the number 7 key in the numeric keypad Press the RF Test Limits soft key to enable or disable test limits on RF Analysis measurements Press the Spurious Emissions soft key 2 Set the limit...

Page 36: ...position can be set manually by entering numeric values frequency when one of the marker types is selected SELECT MARKER Selects an active marker whose position can be changed with the rotary knob or...

Page 37: ...d in accordance with trace change MARKER ALL OFF Turns all the markers the screen off When the Marker View is selected for those markers the instrument displays those markers back at the previous posi...

Page 38: ...measurement provides the followings P vs T Slot P vs T Frame Setting Mode Step Description 1 Connect the cable Connect the signal to the Spectrum Analyzer RF In 50 port using the cable whose loss was...

Page 39: ...he rotary knob or the arrow keys the channel changes in a predefined channel step The channel step can be configured by selecting the Channel Step soft key FREQUENCY STEP Defines the moving step size...

Page 40: ...the screen indicating that the input attenuation value must be increased When the instrument is exposed to an over power condition for a long time its performance may be degraded PREAMP Turns on or o...

Page 41: ...is the number 1 key in the numeric keypad Press the Sweep Mode soft key Toggle between Continue and Single Setting Trigger Source TRIGGER This hot key is used to select the trigger source among RF Bu...

Page 42: ...chronized with the Base Station When an external clock is not supplied the JD7105B works with a built in internal high accuracy time base In this case some measurement results may exhibit inaccurate v...

Page 43: ...measurement parameters MEASURE SETUP Detect Mode Auto GSM or EDGE Delay Enter a value uSec or ENTER RX Filter No Filter 100K 200K 400K Default or 624K PSK Constellation On or Off PSK DC Remove On or O...

Page 44: ...lue dBm or ENTER Frame Average Power Test Limits On or Off High Limit Enter a value dBm or ENTER Low Limit Enter a value dBm or ENTER Press the Burst Power soft key Press the Test Limits soft key to t...

Page 45: ...y to complete the input LOW LIMIT Sets the lower limit of the Pass Fail criteria Use the numeric keys to enter a threshold or limit value and press the dBm unit soft key or the ENTER hard key to compl...

Page 46: ...GSM GPRS EDGE SIGNAL ANALYZER 46 JD7105B Base Station Analyzer Measurement Example GSM Power vs Time Slot Measurement Screen GSM Power vs Time Frame Measurement Screen...

Page 47: ...ncy Step Description 1 Set the frequency FREQ DIST Center Frequency Enter a value GHz MHz kHz or Hz or Channel Number Enter a value Forward or Reverse Press the FREQ DIST hard key Press the Center Fre...

Page 48: ...size of the Channel Number when using the rotary knob or the arrow keys The step size can be entered by using numeric keys and the Enter soft key CHANNEL STANDARD When the channel standard is selected...

Page 49: ...ondition for a long time its performance may be degraded PREAMP Turns on or off the internal pre amplifier The pre amplifier is to amplify a low level input signal This soft key toggles between the On...

Page 50: ...he user input window must be inactive first to get the Sweep hot key function other than the number input SWEEP MODE Sets the sweep method Toggle between Continue and Single Step Description 1 Set the...

Page 51: ...chronized with the Base Station When an external clock is not supplied the JD7105B works with a built in internal high accuracy time base In this case some measurement results may exhibit inaccurate v...

Page 52: ...NTER RX Filter No Filter 100K 200K 400K Default or 624K PSK DC Remove On or Off PSK Constellation On or Off Press the MEASURE SETUP hard key Press the Detect Mode soft key to select the mode Press the...

Page 53: ...ber 7 key in the numeric keypad Press the Modulation Test Limits soft key 2 Set the limit Frequency Error Test Limits On or Off High Limit Low Limit Phase Error RMS Test Limits On or Off High Limit Lo...

Page 54: ...to complete the input LOW LIMIT Sets the lower limit Use the numeric keys to input value and press the unit soft key or the ENTER hard key to complete the input PHASE ERROR RMS Sets the RMS of the pha...

Page 55: ...PEAK Sets the peak of the error vector magnitude which is measured and calculated over the useful part of the burst and is shown as a percentage TEST LIMITS Enables or disables the test limit s Toggl...

Page 56: ...GSM GPRS EDGE SIGNAL ANALYZER 56 JD7105B Base Station Analyzer Measurement Example GSM Constellation Measurement Screen...

Page 57: ...sis OTA provides the following measurements Channel Scanner Frequency Scanner Multipath Profile Modulation Analyzer Setting Mode Step Description 1 Connect the cable Connect an Omni Directional RF Ant...

Page 58: ...frequency changes in a predefined frequency step The frequency step can be configured by selecting the Frequency Step soft key CHANNEL NUMBER Enters a channel number and selects the Forward or Reverse...

Page 59: ...ttenuator s value does not change when the reference level is changed If the input signal level is higher than 30 dBm or higher than the allowable mixer input limit per input attenuator s value set by...

Page 60: ...de SWEEP This hot key is used to set the sweep parameters The user input window must be inactive first to get the Sweep hot key function other than the number input SWEEP MODE Sets the sweep method To...

Page 61: ...xternal Ref Clock Ext Ref SMA Automatic switching Input signal level 3 dBm External GPS GPS Clock GPS SMA Automatic switching GPS signal received PP2S Internal Internal Trigger Default External Extern...

Page 62: ...ENTER Press the FREQ DIST hard key Press the Channel Standard soft key to get the pop up window of the channel standard list Press the arrow keys rotate the knob or press the Page Up and Page Down so...

Page 63: ...e numeric keys and the input is completed by pressing the Enter soft key or ENTER hard key CHANNEL STANDARD When the channel standard is selected from the list the start frequency information on the d...

Page 64: ...e measurement parameters MEASURE SETUP Detector RMS or Peak Press the MEASURE SETUP hard key Press the Detector soft key to toggle between RMS and Peak GSM OTA Channel Scanner Measurement Procedure ME...

Page 65: ...nels Enter a value between 8 and 64 Enter or ENTER Press the FREQ DIST hard key Press the Start Frequency soft key Use the numeric keys Press the unit soft key to complete the input Press the of Chann...

Page 66: ...ess the Frequency Scanner soft key 2 Set the measurement parameters MEASURE SETUP Detector RMS or Peak Press the MEASURE SETUP hard key Press the Detector soft key to toggle between RMS and Peak GSM O...

Page 67: ...67 GSM GPRS EDGE SIGNAL ANALYZER JD7105B Base Station Analyzer Measurement Example GSM OTA Frequency Scanner Measurement Screen...

Page 68: ...mode MODE Signal Analyzer GSM OTA Multipath Profile Press the MODE hard key Press the Signal Analyzer soft key Press the GSM soft key Press the OTA soft key Press the Multipath Profile soft key Measu...

Page 69: ...stellation soft key Toggle between On and Off GSM OTA Multipath Profile Measurement Procedure MEASURE SETUP DETECT MODE Selects the signal standard of GSM or EDGE Default setting is Auto DELAY Sets th...

Page 70: ...na is supplied and locked to the satellites the positioning information including longitude latitude and the number of tracked satellites will be displayed on the bottom of the screen GPS Indicator De...

Page 71: ...50 port of the JD7105B Connect a GPS Antenna to the GPS port of the JD7105B 2 Select the measurement mode MODE Signal Analyzer GSM OTA Modulation Analyzer Press the MODE hard key Press the Signal Ana...

Page 72: ...SK DC removal Setting Limit LIMIT This hot key is used to set the threshold value for the limit line on the display screen It turns on or off the limit or band limit settings of the measurement for pa...

Page 73: ...n and Off 3 Enable beep LIMIT Beep On or Off Press the LIMIT hot key It is the number 7 key in the numeric keypad Press the Beep soft key to toggle between On and Off and select one This will make aud...

Page 74: ...put EVM RMS Sets the RMS of the error vector magnitude which is measured and calculated over the useful part of the burst and is shown as a percentage TEST LIMITS Enables or disables the test limit s...

Page 75: ...ut Measurement Example GSM OTA Modulation Analyzer Measurement Screen POSITIONING INFORMATION If a GPS antenna is supplied and locked to the satellites the positioning information including longitude...

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