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GC723A/GC724B User`s Manual

1. GC723N GC724B Cable and Antenna Analyzer User s Manual WE j mg son sr pe mm Sea TT DEE Kr i Hi i e e 7 gt i amp KS 23 ee nr T m Ne yo Zeck MA rh d S E A p a Ca sl D j gt a A rv SGU OOO OOO I BUG mH 000000 gt GenComm D nnertr n www gctm net TABLE OF CONTENTS 1 TABLE OF CONTENTS Table of Contents to asia 1 Belg ele 4 Be E e 5 od e leede AA e oo A eae eer ner ee eee R rer ee ee eee eer eee eee 1 1 SEE EE 1 2 GSE GE EE EEE EEE EEE 1 2 ELE e let CN 1 3 Key Meaeurements A 1 3 WE 1 3 Application NN 1 4 Supplementary Functions ccccecccsececceeeeceeeeeceeeecsueeeceeeeeseeeeseueeeseeeessueeeseeeesueesseeeessuseseeeeess 1 4 A 1 5 o e 1 5 Input Power amp Other Information 1 6 Electrostatic Discharge Precautions kk 1 7 2 0 GETTING STARTED EEN 2 1 Unpacking The GC 2332 724 rren rrrnrrr rren r rrenen 2 2 GC723A GC724B Accessories rrnrnrrrnnnnrnrnnnnnnnnrnrrarnnnnnrnvnnrrnnnnrnnnnrrnnnnrnnnnrennnnrnnnnsrnnnnrnvnsernnnsernnnsennn 2 3 Layout amp Hard Soft Keys oasen iii dieta 2 4 EN OU EEE EE NE NN NE EEA 2 4 EON 2 5 FT NNN 2 6 FONN 2 6 TN 2 6 Eee 2 6 ENTER F AA o A 2 6 ESN Sussie oneroso opio 2 7 JA A nn A A 2 7 UT IN 2 8 A 2 9 A e EE eee 2 9 Ree 2 9 Display Screen Overview rrrnrrrnrnrrvrnnnrnvnnnrnvnnrnnnnrnnnnnrnnnnrnnnnnenvnnernnnnrnnnnsnnnnnrnnnssnnnn
2. Open CAL Complete is displayed at its completion 3 Connect a Short standard then Connect CAL Kit Shorf connector to the test cable press Enter When the Short screen menu is selected a progress bar is displayed to show the progress The message Short CAL Complete is displayed at its completion 4 Connect the 500hm Load standard Connect CAL Kit Load connector to the test cable then press Enter When the Load screen menu is selected a progress bar is displayed to show the progress The message Load CAL Complete is displayed at its completion Calibration state is changed to CAL ON after the Open Short Load calibration Table 15 Calibration Procedure i Chapter 4 4 10 Chapter 4 fi MAKING DTF MEASUREMENT If a port extension cable is used to interconnect the instrument with the transmission line a measurement error can happen due to the sum of the port extension cable length By performing the O S L calibration at the end of the port extension cable the extension cable length will be compensated and the fault location can be more accurately measurable Antenna Feed line Extension Cable GenComm GC724B Cable And Antenna Ana lyzer Figure 13 Connection Diagram for DTF Measurement The maximum allowable input level of the instrument is 25dBm Do not connect the RF Out Reflection port directly to the system output port Exposure to the
3. Save amp Load for procedures to save traces l Chapter 2 2 32 GETTING STARTED Trace cont d Peak Peak Light Light Scale 9 Scale Hold Chapter 2 Hold Trace View Hides or displays the Trace number on the screen Press the Select screen menu key to choose the Trace number Traces with View set OFF are hidden from the screen The information about hidden traces is also cleared from the information window shown on the upper right of the screen Setting View On restores hidden traces and information on the window Clear Write Clear selected Trace and Write Assign current Trace Trace Clear Deletes an active trace channel from the screen The cleared channel is not restored lt is used to select and delete a trace channel one by one when multiple channels are displayed on the screen Verify the channels to delete with Trace View ON OFF function in advance settings as cleared channels cannot be restored Trace Clear All Deletes all channels from the instrument and initialize the trace settings This key is used to find the peak value of a trace Pressing this key leads to the activation of Marker CH1 and places the marker to the peak point of the trace Peak Right Moves a marker to the nearest peak on the right Peak Left Moves a marker to the nearest peak on the left Max Search Moves a marker to the highest point of the trace Min Search Moves a marker to the l
4. Moves to the next page DTF Setting Opens a list of DTF measurement settings e Apply Applies the setting and exits the menu e Velocity Sets the Propagation Velocity of the cable to be tested The velocity will affect the distance of DTF measurement so that it is important to set the propagation velocity for the type of transmission line being tested e Cable Loss Sets the Cable Loss of the cable to be tested The cable loss will affect the peak amplitude of DTF measurement so that it is important to set the propagation velocity for the type of transmission line being tested e Unit Selects the unit of X axis scale to display the measurement results in Meter or Feet Chapter 2 2 30 GETTING STARTED Trace Data Point 3 Trace Point Marker O Marker Chapter 2 e Windowing Applies video filtering to the display of the trace If the video filter is activated by selecting Rectangular or Blackman filter types traces are filtered by smoothing out the sharp transitions thereby enabling users easy to discriminate noises and peaks Trace point is used to select the number of data points to take during a VSWR and Cable Loss measurement There are 4 different data points available 126 251 501 and 1001 The default number of trace points is 251 A marker is used to get the data on the specific point of a trace A total of 6 markers can be displayed on the screen and each maker can be assigned i
5. NMT 451 20kHz COMA2k DOWN 494 NMT 451 20kHz CDMA2k FULL 494 NMT 450 20kHz CDMA2k UP 458 NMT 450 20kHz CDMA2k DOWN 468 NMT 450 20kHz CDMA2k FULL 468 NMT 900 UP 915 NMT 900 DOWN 960 NMT 900 FULL 960 PCS GSM 1900 UP 1 910 PCS GSM 1900 DOWN 1 990 PCS GSM 1900 FULL 1 990 PCS KOREA UP 1 780 PCS KOREA DOWN 1 840 1 870 PCS KOREA FULL 1 870 PDC 800 UP 940 PDC 800 DOWN 885 PDC 800 FULL 940 PDC 1500 UP 1 549 PDC 1500 DOWN 1 501 PDC 1500 FULL 1 549 PHS 1 918 SMR 800 UP 821 Band List Band Name SMR 800 DOWN SMR 800 FULL SMR 1500 UP SMR 1500 DOWN SMR 1500 FULL TACS ETACS UP TACS ETACS DOWN TAGS ETACS FULL Tetra Start Freq MHz 851 1 453 mob Ae El EI NININA SI END 380 BAND LIST 8 3 Stop Freq MHz 866 866 1 465 1 513 1 513 915 960 960 430 Band List 8 4 CABLE LIST PPENDIX B CABLE LIST Cable Type Nominal Attenuation dB m 1000MHz FSJ1 50A 0 197 FSJ250 0 134 FSJ4 50B 0 119 HCC 12 50J 0 092 HCC 158 50J 0 023 HCC 300 50 o p 0 014 HCC 312 50 096 0 013 HCC 78 50J 0 042 HF 4 1 8 Cu2Y 0 01 HF 5 Cu2Y 09 4 0 007 HF 6 1 8 Cu2Y 0 006 HJ4 5 50 0 054 HJ4 50 0 087 HJ5 50 0 042 HJ7 50A 0 023 LDF12 50 0 022 LDF4 50A 0 077 LDF5 50A 0 043 LDF6 50 0 032 LDFF7 50A 0 027 LMR100 08 0 792 LMR1200 0 044 LMR1700 0 033 LMR200 0 344 LMR240 0 262 LMR400 0 135 LMR500 0 109 LMR600 0 087 LMR900 0 056 RG142 DDR 0 443 RG17 17A 0 18 RG174 Po CE 0 984 R
6. Setting Relative Propagation Velocity Select the Velocity screen menu Enter user setting value Setting Cable Loss Select the Cable Loss screen menu Enter user setting value Press the ENTER key Setting the X axis Unit Meter Feet Setting Windowing Rectangular Blackman Press Apply to save changes Table 14 Additional calibration is not necessary if a Freg Band has been set and a calibration has been performed for the band in VSWR measurement and the same Frea band is used in the DTF measurement The ending point can only be set in distance setting The maximum measurable distance is 1 250m 4 125ft Cable Name Velocity LOSS 1GHz LOSS 2GHz EC6 50 1 1 4 EC7 50 1 5 8 EFX2 50 FLC 114 503 FLC 12 503 a P E D D E E Y Page 77 11 M ee ee Exit without pressing Apply button will not save any changes DTF Setup Procedure i Chapter 4 4 8 Chapter 4 f CALIBRATION The instrument must be calibrated to get reliable measurement results The instrument must be calibrated to get the DTF measurement results compatible with VSWR measurement results Calibration accessories optional Calibration Kit which contains one 50 ohm load one Open standard and one Short standard Test cable Use a phase stable cable for reliable and consistent measurement results Extension Cable Standard O S L Calibration Kit Figure 12 Calibratio
7. The test cable used for port extension must be phase stable in the measurement frequencies O At the successful completion of each calibration step the message is displayed with a beep sound Figure 7 illustrates the connection method when a port extension cable is used for calibration To compensate for errors caused by a port extension cable or adapters it is required to perform an Open Short Load calibration including the port extension cable Action Note Performs Calibration after the frequency setting and test cable connections 1 Press the CAL key Hard function key 2 Connect an Open standard then Connect CAL Kit Open connector to the test cable press Enter When the Open screen menu is selected a progress bar is displayed to show the progress The message Open CAL Complete is displayed at its completion 3 Connect a Short standard then Connect CAL Kit Shorf connector to the test cable press Enter When the Short screen menu is selected a progress bar is displayed to show the progress The message Short CAL Complete is displayed at its completion 4 Connect the 500hm Load standard Connect CAL Kit Load connector to the test cable then press Enter When the Load screen menu is selected a progress bar is displayed to show the progress The message Load CAL Complete is displayed at its completion Calibration state is changed to CAL O
8. USB USB memory Select the Save Trace screen menu Screen menu key Select the Trace number T1 T4 Select a trace number to be saved Assign the File Name User enters the file name manually using the keyboard on the screen To delete all of previous entered name press Clear To delete previous entered name one by one press Back Space Press the Done key Press Done for save changes Press Cancel to exit without save changes Table 21 Trace Saving Procedure Chapter 7 7 4 SAVE amp LOAD Co Ltd 10 23 2088 22 24 02 HEEE B C E C Y C EE CN 60 LE Mca Ea La Ee e Meter Figure 30 Save Screen to Enter File Name When a user assigns the file name manually the ENTER key on ON the screen keyboard or Done key on the screen menu key must be entered after finishing the entry of a file name Chapter 7 SAVE amp LOAD 7 5 SAVE SCREEN This function is to save the measurement display screen in the graphic file format Following is the procedure for screen saving Action Note This function is available in VSWR DTF and Cable Loss measurement mode 1 Press the SAVE key Multi key 2 Select the Memory Type Select either an internal memory or an external Internal USB USB memory 3 Select the Save Screen screen menu Screen menu key 4 Assign the File Name User enters the file name manually using the keyboard on the screen To delete al
9. 25 MED ERE REE TE ET 2 26 eco AA A 2 26 Auto Scale eege EE 2 26 A eese E ce saseeeeeateseeteeeseenea eseee sae 2 26 ED 2 27 Te DANN 2 30 o execs ester ce acct cet cence ce eae serene as AE EE AEE 2 30 PP Pen 2 31 A A 2 32 Go REE EE EEE A E 2 32 Eech 2 32 EEE 2 32 o EEE EE EEE EE EE EE a 2 33 MAP 2 33 System NOM Ee ccanaces tcaccacactarcacnnutahassensadeas ovanosteceaceaseantacaaecnsecsanacaaaeteceeanedneatabanecuceueasnese sx 2 34 Chapter 2 2 2 Chapter 2 GETTING STARTED UNPACKING THe GC723A GC724B Unpack and inspect the shipping container and its contents thoroughly to ensure that nothing was damaged during shipment If the contents are damaged or defective contact your nearest GenComm sales and service office Keep the shipping materials for carrier s inspection Verify that all the parts were included in the shipping container The basic test set package for the GC723A GC724B includes GC723A GC724B Cable and Antenna Analyzer Soft Carrying Case AC DC Adapter Crossover LAN Cable 1 5m 1GByte USB Memory Automotive Cigarette Lighter 12V DC Adapter Stylus Pen User s Manual CD ROM Application Software CD ROM Rechargeable Li ion Battery GETTING STARTED 2 3 GC723A GC724B ACCESSORIES Description Pee Specification Soft Carrying Case Soft Carrying Case Part No GC723 50541 AC DC Adapter Part No GC724 50522 Input 100 250V AC 1 2A Ou
10. 8 98 7 98 6 98 5 98 4 98 3 98 1 97 9 97 7 97 5 97 2 97 0 96 7 96 5 96 3 96 0 95 7 95 5 95 2 94 9 94 7 94 4 Power Refl 0 0 0 0 Oo oooooooo NN 00 ed w Od a SEE Onn A I ND MI sch sch d eck sch sch zk sch sch zk Ei CH O OT GO ONSIDARDON OO O COO pa b NX 0100 0 4 0 VSWR esch sech sesch wech sesch db dh sesch db o db zech sesch db wech sesch sesch O 0 O w w 0 0 EK EES BD ANOM MRNOMMRANOGMSR N sch O O O O O O 2 50 3 00 3 50 4 00 4 50 5 00 5 50 6 00 6 50 7 00 7 50 8 00 8 50 9 00 9 50 10 00 11 00 12 00 13 00 14 00 15 00 16 00 17 00 18 00 19 00 20 00 25 00 30 00 2 2 O O d zk sch sch eck sch eck eck y OO OO Och bM bM OO Oz OD O og ON Trans Loss dB 0 263 0 276 0 289 0 302 0 315 0 329 0 342 0 356 0 370 0 384 0 398 0 412 0 426 0 440 0 454 0 468 0 483 0 497 0 512 0 881 1 249 1 603 1 938 2 255 2 553 2 834 3 100 3 351 3 590 3 817 4 033 4 240 4 437 4 626 4 807 5 149 5 466 5 762 6 040 6 301 6 547 6 780 7 002 7 212 7 413 8 299 9 035 Volt Refl Coeff 0 24 0 25 0 25 0 26 0 26 0 27 0 28 0 28 0 29 0 29 0 30 0 30 0 31 0 31 0 32 0 32 0 32 0 33 0 33 0 43 0 50 0 56 0 60 0 64 0 67 0 69 0 71 0 73 0 75 0 76 0 78 0 79 0 80 0 81 0 82 0 83 0 85 0 86 0 87 0 88 0 88 0 89 0 89 0 90 0 90 0 92 0 94 P
11. EE 4 12 Figure 16 Measurement Display applying Rectangular Window ooooocccconcccnonccnnnccnnncnnnnnnnnonannn nos 4 13 Figure 17 Measurement Display applying Blackman VW mdow 4 13 Figure 18 Cable Loss Measurement Display ooocccconnccconcnccncnnonononnnnnnnncnnnonononnnnnnnnnnnonnncnnncnnnnnos 5 4 Figure 19 Calibration Diagram E 5 6 Figure 20 Cable Loss Measurement Connection Diagram ooccccconcccnccnnccnconaccncnncnncnnncnnnnnnncnnnnnaninos 5 8 Figure 21 Using Markers in Cable Loss Measurement Mode 5 9 Pique 22 Lm SPAN AUB EE 5 9 Figure 23 Power Sensor Measurement Display nennnennnenneneerrnrrnrtrrrrerretrrnrrrnrrnrrrnrrrrrnnne rennene 6 3 Figure 24 Power Meter Screen before Connecting Gensor 6 5 Figure 25 Terminating Power Sensor Connection Diagram ooocccconcccccnnnccnconaccncnncnncnnncnnonnncnincnnncnnos 6 6 Figure 26 Directional Through Line Power Sensor Connection Diagram 6 6 Figure 27 Power Sensor Initial Screen ccccccsececceseeceeeeceeeeceeeececeeseeeeeceueessecessueeeneneessaeeesaaes 6 7 Figure 28 HPA High Power Amplifier Output Power Measurement w Terminating power sensor 6 8 Figure 29 HPA High Power Amplifier Output Power Measurement w Directional power sensor 6 9 Figure 30 Save Screen to Enter File Name ooonocccocnccocccnccncncononcconnnonncncnnnnnonnnrncnonnnoncnnnnncnnnnnnnnnnos 7 4 Figure 31 Trace Loading Green 7 9 Fi
12. Frequency Setting Procedure Chapter 3 3 8 VSWR O Changing the frequency settings will automatically turn calibration OFF with the indication CAL OFF displayed on the screen Always set the frequency before calibrating the instrument Changing the trace points during the measurement doesn t affect the calibration Chapter 3 VSWR l 3 9 CALIBRATION The instrument must be calibrated to get a reliable measurement result For best results set the frequency and calibrate the instrument immediately before taking a measurement Calibration accessories optional Calibration Kit which contains a 50 ohm load one open standard and one short standard Test cable Use a phase stable cable for reliable and consistent measurement results To minimize measurement errors connect the port extension cable to the RF Out port on the instrument and then connect the Calibration Kit to the end of the extension cable If temperature changes by 10C or more from the temperature registered during calibration then the calibration status will not be valid and CAL OFF T will be displayed This means that it is required to re calibrate the instrument for accurate results Extension Cable Standard O S L Calibration Kit Figure 7 Calibration for VSWR measurement I Chapter 3 3 10 VSWR Bending or moving the phase unstable cable while making a measurement may cause errors in the measurement
13. Ltd 2008 11 11 09 44 06 Device Version 2 20 Last Build Time 2008 09 22 09 04 10 Light 50 Keypad Beep Off Sleep Time Off Battery Status 98 Language English System Temperature 47 8 Serial Number Optional Module BiasTee enabled Figure 1 System Screen Chapter 2 GETTING STARTED The System key opens the following screen menu Upgrade Upgrades the instrument s firmware For detailed upgrade procedure refer to the section Firmware Upgrade Beep Activates or deactivates the beep sound of alarms or when keys are pressed Sweep Mode Sets the sweep mode either single or continuous in VSWR DTF or Cable Loss measurements If Sweep Mode is set to Single the message Hold On is displayed at the completion of a single sweep Every time the Hold key is pressed a new sweep is done once Instrument Setting gt gt Language Changes the language used in menus messages and information on the screen For details refer to Language Setting Time Date Sets the time of the system clock LAN Sets the Ethernet communication setting Touch Screen Enable or Disable touch screen Sleep Time Sets the time to enter into power saving mode Power saving mode is automatically activated when no key entry occurs during the Sleep Time Sleep Time setting range 1 200 minutes Power saving mode is turned off when Sleep Time is set to 0 License Us
14. Max Top setting value Adjustment can be made in steps of 0 01 Return Loss Y Scale Max Top Entry values can be from 0 0 to 59 99dB and it cannot be equal to or smaller than the Min Bottom setting value Adjustment can be made in steps of 0 01 Amp cont d Freq Dist 2 Freq Dist GETTING STARTED 2 27 Min Bottom Entry values can be from 0 01 to 60 00dB and it cannot be equal to or larger than the Max Top setting value Adjustment can be made in steps of 0 01 Limit Turns On and Off the limit line on the display If a measurement exceeds the limit line the trace above the limit line is displayed in red color and an audible beep sound is generated Limit Type Selects between single and multiple limit lines Limit level Sets the position of a limit line Depending on the Y scale of a graph the input units are set automatically as none for VSWR or dB for Return Loss The value of limit level is displayed on the limit line The instrument takes into account the negative values of Return Loss therefore is not needed to add a minus sign in a value entry The Y axis of a graph doesn t show the minus sign Freq Dist key causes different screen menu to be displayed depending on a measurement mode In VSWR or Cable Loss measurement modes it opens a frequency screen menu and in DIF measurement mode it opens a distance screen menu VSWR Cable Loss Measurement
15. Mode Start Freq Sets a start frequency of the measurement to be made Stop Freq Sets a stop frequency of the measurement to be made Center Freq Sets a center frequency of the measurement to be made Span Sets a user defined frequency span Band List Opens standard or custom frequency band stored in the instrument Standard Band Opens the world wide standard Band List stored in the instrument gt Select Selects the Band from the list l Chapter 2 2 28 GETTING STARTED Freq Dist cont d Chapter 2 gt Add to Custom Copies a frequency band stored in the Standard Band List to the Custom Band gt Page Up Moves to the previous page gt Page Down Moves to the next page Custom Band Opens the customized Band List stored in the instrument gt Select Selects the Band from the list gt Delete Deletes the selected frequency band from the Custom Band gt Delete All Deletes all files in the Custom Band list gt Page Up Moves to the previous page gt Page Down Moves to the next page DTF Measurement Mode Start Freq Sets the starting frequency to measure DTF Stop Freq Sets the stop frequency to measure DTF Distance Sets a distance to measure The maximum measurable distance is 1250m 4125ft Band List Opens standard or custom frequency bands stored in the instrument Standard Band Opens the world wide standard Band List registered in the instrument gt Select Selects t
16. Number T1 T4 screen Select Trace number to be cleared arrow mark menu indicate current trace 3 Select the Trace Clear screen menu Delete the selected Channel from the screen 4 Select the Clear Write screen menu By selecting Clear Write current selected trace which marker indicates will be assigned to current trace All traces except the current trace are deleted from the screen when Trace Clear All is selected Table 26 Trace Unloading Procedure SAVE amp LOAD 7 11 USING MARKERS Each marker can be set on the individual trace among multiple traces ON LOADED Active marker will be set on the active trace By changing the active trace TRACES the active marker will be set on the active trace Six markers can be used simultaneously Markers can be set on the trace s to indicate the location All the necessary information such as X and Y axis are provided in the marker table at the bottom of screen A marker can be moved to a specific frequency by using the Marker Edit GenComm Co Ltd 2008 12 09 16 19 11 VSWR 2 50 o poo 2008 12 09 16 14 57 me Point 251 Point Mi Y Average 1 51 i Marker ac VSWR Marker Select gt M3 Marker Yiew OFF ON Span ft TI T T gt Band Name M3 Y Custom nture Mi Y ml O ltl 810 00 860 00 MHz 910 00 gt Marker Clear All Marker Edit 7 Calibration completed Figure 33 Marker Display Screen with Multiple Tr
17. Points 1 x R esolution 1 2 Resolution 15x 1088 V Ge PY ettay Z F Vp Cable s relative propagation velocity Delta Hz Stop Freq Start Freq ZF ZoomFactor Setup DistA Dist Measurement Range Immunity to Interfering Signals GC724 50552 RF Power Meter Requires Power Sensors Measurement Range Return Loss Display Range 80 80dBm Measurement Uncertainty Offset Range 100 100dB Connector Type Resolution 0 01dB W Miscellaneous Dimension 260mm x 190mm x 60mm 10 2 x7 5 x2 3 Operation Temperature Weight lt 2 0kg 4 4lbs includes batte storage Temperature Battery Li ion gt 3hrs continuous operating 1 The specification provided at a temperature of 25 C 10 All Specifications based on calibrating at 25 C after 5 minute warm up S pecification and product description are subject to change without notice Terminating Power Sensors SPECIFICATION 8 5 Average and Peak 300 3800MHz 0 01dB or 0 1xW 21 76 51 76dBm 0 15 150W 36 02 56 02dBm 4 400W 4 of reading 0 05W1 27 dB Min 27 dB Min N Female on both ends Average and Peak 150 3500MHz 24dBm 43dBm 0 25 20W 24dBm 43dBm 0 25 20W 4 of reading 0 05W1 27 dB Min 27 dB Min N Female on both ends Average 20 3800MHz 30 20dBm 1uW 100mW 7 of reading N Male Average 40 3000M Hz 30 0dBm 1uW 1mW 10 of reading2 N Male Peak 40 4000MHz 30 0dBm 1
18. Table 17 Calibration Procedure EE 5 7 Table 18 Cable Loss Measurement Procedure cccececcececeecececeeeececeeeeeeceeaeeeeaeeeceeaeneseeeenenenenaes 5 8 Table 19 Types of Power SensoFS coccccccncocccconcncocnccncnnncncnnnnoncnnnnnnonnnnnnnnnnnrnnnrnnnnnnnnrnnnnnnnnnnnnnanennins 6 2 Table 20 Power Measurement Hrocedure rrr nrnr rerne 6 9 Table 21 Trace Saving Procedure oocccocncocccccoccncccnconcnoncnononnnncnonnnnnnnnnnnnnnnnrnnnrnnnnnnnnrnnnnnnnnnnnnnenenanins 7 3 Table 22 Screen Saving ProCeCure ccccccccccsececseceeecceeeeeeeeeeeeeeseeeseeeeseeeseeeseeeeseeseeeeseeeeseeesseeeses 7 5 Table 23 Setup Saving Procedure ooccoocnccccccoccncocnconcnoncnnnnnnoncnnnnnnnnnnnnnnnnnnnnnnrnnnnnnnnrnnnnnnnnnnnnnaninanins 7 6 Table 24 Saved Parameters in each Measurement Mode 7 7 Table 25 Trace Loading rocedure nnne 7 10 Table 26 Trace Unloading Procedure cccccccsecccseeeceeeeecenseeeceeeesseeeeecenseeeeeeeeusenseeenaeenseeseaes 7 10 This page intentionally left blank INTRODUCTION 1 1 1 0 INTRODUCTION n this chapter VAN 1 2 CONAN EEE EE nn 1 2 GC723A GC724B Hoblohis 1 3 JEAN ET Eee EEE O E E 1 3 QQ PE A 1 3 Application SOM EE 1 4 Supplementary FUNCION Surrender srl cio dos 1 4 Safety Information 1 5 Ss ERE EEE A 1 5 Input Power amp Other Information cccccescccseeecceseceeeeeecueececeeeceueecseeeessaeseseeeeceueeeseeeesaeessages 1 6 Electrost
19. are indispensable for preventive maintenance of telecommunication lines as they can reveal growing resistance levels on joints and connectors as they corrode and increasing insulation leakage as it degrades and absorbs moisture long before either leads to catastrophic failures Using a DTF it is possible to precisely identify the fault location i Chapter 4 4 4 DTF DTF DISPLAY Maximum Distance Trace Point Freq Span Freq Band Info Cable Info Captured Trace Info Chapter 4 STARTING DTF MEASUREMENT Display Overview The screen shown in the following figure is displayed when DTF measurement mode is selected The distance from the instrument is shown in the X axis while the relative magnitude of the discontinuity is shown in the Y axis The information related to the DTF measurement is shown on the screen Measurement Limit Line amp Mode amp Scale Limit Level Info Fail Range GenComm Co Ltd 2008 10 23 23 49 52 r 1 20 2008 10 23 23 14 28 PPT WS 2034 90 2284 90 M 98 meter Point Span l TT L 250 00 MHz Limit Limit Level 1 10 Band Name Custom OFF ON Ge Pt J Limit Leve 23 49 19 Screen data saved 14 jpg Vi AM Li Distance Meter y Pass Range Figure 11 DTF Measurement Display Limit Line amp Limit Level Info Sets the upper limit value of a trace The portion of the trace that exceeds the limit line is displayed in red
20. band list stored in the instrument If the user sets the start stop center or span frequency manually the band name will indicate CUSTOM CABLE LOSS 5 5 SETTING The user must set the frequency band to make a Cable Loss FREQUENCY measurement Frequencies can be set manually or chosen from a band list stored in the instrument Action Note Setting Center Freq and Span 1 Setting Start Stop Frequency 1 2 3 4 D 6 7 2 3 d 5 6 7 Press the FREQ DIST screen menu Multi Key Select the Center screen menu Current setting is displayed as default on the screen Enter a center frequency value CENTER FREQUENCY Press the ENTER key 860 00MHz Select the Span screen menu Enter a span value Press the ENTER key Press the FREQ DIST key Current setting is cleared when a new value is Select the Start screen menu entered Enter a start frequency value Input unit is MHz and minimum input step is 0 01MHz Press the ENTER key Select the Stop screen menu Enter a stop frequency value Press the ENTER key Selection from the band list registered in the instrument 1 Press the FREQ DIST key BAND NAME FREQ MHz e JAPAN 2477 00 2497 00 Select the Band List screen menu CUSTOM Caso P UP 45 00 464 00 ge P FULL Ja IR A 74 DU Select the band from the and then press the BH 465 00 470 00 2450 S DOAN 455 00 4160 00 CaM SA FULL 4395 IR 200041 Enter key or choose Select
21. frequency setting DTF measurement mode only VI Relative Propagation Velocity CL Cable Loss applicable to DTF measurement mode only Trace Information Marker Position MARKER Displays the Marker Table when Marker is set INFORMATION MESSAGE Displays the result of performed functions or error messages WINDOW Chapter 2 2 12 GETTING STARTED FUNCTION amp HARD KEYS Function hard keys on the front panel of the instrument are used to select measurement modes or perform specified functions Refer to the following sections for the key structure to be used in each measurement modes Chapter 2 GETTING STARTED 2 13 SYSTEM SCREEN System screen menu is used to change the basic settings of the MENU instrument and consists of the following sub menus l Screen Menu Function Key F m a 1 Layer 2 Layer 3 Layer 4 Layer Ce Kee Instrument Setting Language Engish Date Time Mode Static DHCP Touch Screen E EECHER Table 3 Menu structure in System mode Chapter 2 2 14 GETTING STARTED COMMON MENU The menu structure is common to all the measurement modes except for the Power Meter mode as shown in the following table Screen Menu Function Key Multi Key 1 Layer 3 Layer VSWR Amplitude Max Top DTF vin Bottom Cable Loss Limit Limit Level oc Marker Marker Select M1 M2 M3 M4 M5 M6 Marker View Marker Clear All ON Marker Edit Kc Marker Type Tr
22. select the cable stored in the instrument without setting the detailed parameters of the cable Setup Used to change the setting of the cable parameters or change the distance unit It consists of the following sub menus e Velocity Sets the relative propagation delay of a cable It affects the calculation of the distance in the DIF measurement e Cable Loss Sets the loss per distance unit of a cable It affects the peak level of the discontinuity in the DTF measurement After calibration do not change the connection of the port extension cable or the frequency setting It can cause a measurement error When the frequency setting is changed a warning alarm will sound and the calibration state will change to CAL OFF After changing the frequency setting recalibrate the instrument using the Open Short Load standard A detailed procedure for DTF setup is as follows DTF 4 7 Action Note Frequency Setting Press the FREQ DIST key Select the Start Freq screen menu Enter start frequency value Press the ENTER key Select the Stop Freq screen menu Enter stop frequency value Press the ENTER key Distance Setting Select the Distance screen menu Enter measuring distance Press the ENTER key Cable Setting Select the Cable List screen menu Standard Cable Custom Cable Select a cable by using Knob or arrow key a Press the Select key DTF Setting Select the DTF Setting screen menu
23. the VSWR SWR has a number of implications that are directly applicable to RF radios SWR is an indicator of reflected waves bouncing back and forth within the transmission line and as such an increase in SWR corresponds to an increase in power in the line beyond the actual transmitted power This increased power will increase RF losses as increased voltage increases dielectric losses and increased current increases resistive losses Matched impedances give an ideal power transfer mismatched impedances give high SWR and reduced power transfer Higher power in the transmission line also leaks back into the RF radio which causes it to overheat The higher voltages associated with a sufficiently high SWR could damage the transmitter Solid state radios which have a lower tolerance for high voltages may automatically reduce its output power to prevent damage The high voltages may also cause transmission line dielectric to break down and or to burn VSWR measurements may be taken to ensure that a waveguide is contiguous and has no leaks or sharp bends If such bends or holes are present in the waveguide surface they may diminish the performance of transmitter and receiver equipment strings Another cause of bad VSWR in a waveguide is moisture build up which can typically be prevented with silica gel or pressurization of the waveguide with dry gas Chapter 3 3 4 VSWR PRACTICAL IMPLICATIONS OF SWR cont d RETUR
24. using the provided cable as shown in the following figure Do not connect a power sensor directly to the LPA or HPA f Chapter 6 6 6 POWER METER CE eC L CCDS j DC 15V IN RF Out LAN USB Serial Interface A A Be Ee DUU GC723A GC724B Cable and Antenna Alyzer Figure 25 Terminating Power Sensor Connection Diagram From Amplifier gt Y HI gt TO Antenna CH A a eQ a DC 15V IN RF Out LAN Figure 26 Directional Through Line Power Sensor Connection Diagram Chapter 6 I POWER METER 6 7 After connecting a power sensor select the Initialize Preset screen menu key for the instrument to recognize the sensor After successful recognition of the power sensor the sensor type is displayed on the screen as shown in the following figure No sensor type is displayed on the screen if the instrument is not able to recognize a sensor type during the initialization process GenComm Co Ltd 2008 12 09 17 59 33 Initialize Preset Model GC731A SN 0022 Type Directional AVG Absolute Mode Abs Yalue 104 4 7W Frequency Display Setup gt Limit Setup gt Max Min Frequency 1000 00MHz Ext Offset 0 00dB Reset Mode gt 17 58 23 Screen data saved PWR_jpg Average Figure 27 Power Sensor Initial Screen f Chapter 6 6 8 Chapter 6 I MAKING POWER MEASUREMENT After the connection and initialization of a power s
25. 0573 Adapter N m to SMA f DC to 18GHz 500 G7000 50574 Adapter N m to BNC f DC to 1 5GHz 500 Power Meter Accessories GC731A Directional Power Sensor 300 3800MHz Average 0 15 150W Peak 4 400W GC733A Directional Power Sensor 150 3500MHz Average Peak 0 25 20W GC732A Terminating Average Power Sensor 20 3800MHz 30 20dBm GC724 50551 Terminating Average Power Sensor 40 3000MHz 30 0dBm GC724 50552 Terminating Peak Power Sensor 40 4000MHz 40 0dBm Ordering Information GC723A GC 24B Cable and Antenna Analyzer Corporate Office Seoul 153 803 Korea Tel 82 2 6676 7070 Fax 82 2 6676 7040 Web www gencomm co kr GenComm Copyright GenComm All rights reserved For the most recent specifications visit www gctm net Customer Support 14 Floor E amp C Dream Tower VII Tel 82 2 66 76 7090 60 44 Gasan Dong Kumchun Gu Email support gencomm co kr Sales Korea Tel 82 2 6676 7080 Email sales gencomm co kr Document Release 1 3 innertrdn International Sales Marketing Office 1190 Saratoga Ave Suite 180 San Jose CA 95129 USA Tel 1 408 679 1002 Email sales gctm net Web www gctm net Y g e 5e a Y Le o SR z Sg A i 4 m r TR 150 9001 Reg No 059
26. 0MHz 0 40dBm Terminating type Table 19 Types of Power Sensors NOTE Specifications listed above subject to change POWER METER 6 3 SETTING POWER METER All the keys used to set the power measurement are displayed as screen menu keys No hard keys on the front panel are used The following is a description of the screen menu and its functions Measurement Cie Pass Range GenComm Co Ltd 2008 12 09 17 59 33 Power Meter i Power Sensor j mitialize Preset Info Model GC731A SN 0022 Type Directional Measurement Frequency Type AVG Measurement Absolute Mode Mode Abs Value 104 47W CEPEJ SENP Current Limit Setup gt Measurement Max Min Min Max Info Frequency 1000 00MHz Ext Offset 0 0008 Reset Freq amp Offset Info 17 58 23 Screen data saved PWR jpg Average Fail Range Figure 23 Power Sensor Measurement Display Power Sensor Info Types of power sensor connected Terminating or Directional and its Model Information Measurement Type Current measurement type information AVG or PEAK Measurement Mode Display current measurement mode Relative or Absolute Current Measurement Display current measured value Min Max Info Display Min and Max value of the measurement Frequency amp Offset Display current frequency setting and External offset setting information Initialize Initializes the power sensor and downloads the calibration
27. 2 Return When the Load Trace function is selected the preview of the selected trace from the list is displayed on the lower right corner of the screen GenComm Co Ltd 2008 12 02 18 29 21 1 00 02 18 18 13 D 910 00 Max Distance 626 meter Point 501 Point Span 100 00 MHz Band Name Custom Cable HFC 12D 1 22 YT 0 879 CL 0 0719 Return Loss o Distance Meter 18 28 09 Screen data saved AAAA jpg Figure 32 Screen with Multiple Traces Trace Trace Select gt T3 Trace Capture Trace Yiew OFF ON Clear Write Trace Clear Trace Clear All Chapter 7 7 10 Chapter 7 SAVE amp LOAD Action Note This function is available in VSWR DTF and Cable Loss measurement mode 1 Press the LOAD key Multi key 2 Select the Load Trace screen menu Saved file list shows up when Load Trace is selected Use dial knob or Up Down Arrow key to select the file to load from the list 3 Press the Select key Load a selected trace Table 25 Trace Loading Procedure Loaded traces can be deleted from the screen according to the above procedure Unlike the loaded traces captured traces cannot be restored once they are deleted Be cautious in deleting traces so that you do not lose any necessary information Action Note Available in VSWR DTF and Cable Loss measurement mode 1 Press the TRACE key Multi key 2 Select the Trace
28. AD 7 1 7 0 SAVE amp LOAD P this chapter Moi NN 7 2 o NN ee atede eee 7 3 EE SEE AI E EAE A E A EEEE E 7 3 EEE Se EE 7 5 Save SOUD EE 7 6 BEE 7 8 Borio VAC E 7 8 Using Markers on Loaded Traces rren reenn 7 11 Earias ke e EEN 7 12 UA nn E ea dese obeuunacadacaentonen eet ata acesaes 7 12 Chapter 7 Chapter 7 SAVE amp LOAD INTRODUCTION Measurement results and setups can be saved to or loaded from the non volatile memory in the instrument or an external USB memory The instrument can save a measurement result in a data file and recall the file later for the purpose of comparison or analysis The display screen can be saved as a graphic file format Also a user setup configuration can be saved The LOAD function is used to recall data files display screens or user setups SAVE amp LOAD 7 3 SAVE The instrument provides the following save functions Save Trace Saves a captured trace in a data file The file name extension is tra Save Screen Saves a current display screen in a JPEG file format Save Setup Saves a user setup configuration SAVE TRACE This function is to save a captured trace using the TRACE function Trace Saving procedure is as follows Action Note This function is available in VSWR DTF and Cable Loss measurement mode 3 6 Press the SAVE key Multi key Select the Memory Type Select either an internal memory or an external Internal
29. COMA CHINA UP 072 00 915 00 LOMA CHINA LC Hen HI Ek MI rr 17 Press Up Down arrow key or rotate the knob to select a band from the list Select the Page Up Page Down screen menu for searching the band that doesnt show up on the current page Table 16 Frequency Setting Procedure Changing the frequency settings will automatically turn calibration OFF with the symbol CAL OFF to be displayed on the screen along with an alarm sound In this case recalibrate the instrument with the Open Short Load Calibration kit Chapter 5 Chapter 5 H CABLE LOSS CALIBRATION The instrument must be calibrated to get reliable Cable Loss measurement results For best results set the frequency and calibrate the instrument immediately before taking measurements Calibration accessories optional Calibration kit which contains one 50 ohm load one Open standard and one Short standard To minimize measurement errors in One port Cable Loss measurement do not use unnecessary extension cables or adapters while performing calibration The following figure illustrates the recommended calibration method for One port Cable Loss measurement Extension Cable Standard O S L Calibration Kit Figure 19 Calibration Diagram If temperature changes by 10C or more from the temperature registered during calibration then the calibration status will not be valid and CAL OFF T will be displayed Th
30. Figure 17 Measurement Display applying Blackman Window i Chapter 4 CABLE LOSS 5 1 5 0 CABLE LOSS P this chapter Mol 5 2 Mi EE NE NE EEE EE 5 3 NL 5 3 Starting Cable Loss Measurement ooooccconcnccoccnnoncncononnnoncnnnnnrnnonnnnnnnrnnnnrnnnnnnrrrnnnnrnnrnrrnnrrrnnrnnenaninnnnnos 5 4 NNN 5 4 o A 5 5 RAMON 0 OPA cee ceeceae meee etamie aameaceaaesumtcess sed enaepeense seqneteedateaceeesustoene senna aciencsneseaenmacasateuaesenes 5 6 Making Cable Loss Measurement Au 5 8 Scale Acdiustmment ttnt n tarr ErEEEEAEEEAEEESEEESEEEEEEEEnE EEEE Areen nErenn 5 9 NN 5 9 e A 5 9 Chapter 5 5 2 CABLE LOSS INTRODUCTION The cable loss measurement feature checks the signal attenuation level of the cable system The frequency band to measure the characteristics of a cable must be calibrated before performing the cable loss measurement Chapter 5 CABLE LOSS 5 3 INSERTION GAIN In electronics the gain is the ability of a circuit often an amplifier to increase the power or amplitude of a signal It is usually defined as the mean ratio of the signal output of a system to the signal input of the same system It may also be defined as the decimal logarithm of the same ratio In telecommunication insertion gain is the gain resulting from the insertion of a device in a transmission line expressed as the ratio of the signal power delivered to that part of the line following the device to the signal power delivered
31. G178B A ICC 1 509 RG187 188 DDR 1 017 RG213 U Po OE 0 292 RG214 0 292 RG223 0 165 RG55 55A 55B 0 541 RG58 58B 1 574 RG58A 58C 0 787 RG8 8A 10 10A 0 262 RG9 9A 0 289 HFSC 12D 1 2 0 112 HFC 12D 1 2 0 072 HFC 22D 7 8 0 041 HFC 33D 1_ 1 4 0 0294 HFC 42D 1_5 8 0 0243 RECX 12D 1 2 0 088 RECX 22D 7 8 0 049 RFCX RFCX RFCL 22D 7 8 0 044 RFCL RFCL 42D 1_ 5 8 0 87 0 0315 Cable List APPENDIX C SPECIFICATION Directional Power Sensors GC731A General Max Input Power 25dBm Frequency Accuracy lt 5ppm Frequency Resolution 100KHz Impedance 500 Test Port Type N Female Trace Storage Up to 400 Screen Storage Up to 100 Setup Storage Up to 20 Frequency Range 25 4000MHz GC724B 100 2700MHz GC 723A Data points 126 251 501 1001 GC733A Return Loss 0 60dB Senor Type VSWR Range 1 65 Frequency Range Measurement Speed 1 1 3 2 5 5sec for each data points Measurement Range Average Cable Loss Peak 25 4000MHz GC724B 100 2700MHz GC 723A 0 30dB 0 01dB Frequency Range Measurement Uncertainty Input Return Loss Directivity Connector Type Cable Loss Range Resolution DTF Distance to Fault Frequency Range 25 4000MHz GC724B GC732A 100 2700MHz for GC 723A Sensor Type 0 1250m 4125ft Frequency Range Measurement Range Measurement Uncertainty Connector Type GC724 50551 Sensor Type Frequency Range Distance Horizontal Range Hof Data
32. N after the Open Short Load calibration Table 13 Calibration Procedure Chapter 3 VSWR 3 11 MAKING VSWR MEASUREMENT The instrument is ready to make VSWR measurements after completing the Open Short Load calibration using a port extension cable The end of the port extension cable must be connected to the device antenna or feed line for VSWR measurements as shown in the following figure The result of the VSWR measurement is displayed on the screen in real time Antenna Feed line Extension Cable GenComm GC724B Cable And Antenna Analyzer Figure 8 Connection for VSWR Measurement Chapter 3 3 12 VSWR SETTING TRACE POINT SCALE ADJUSTMENT USING MARKERS Chapter 3 After calibration do not change the connection of the port extension cable or the frequency setting It can cause an error in the measurement When the frequency setting is changed a warning alarm will sound and the calibration state will change to CAL OFF In a e this case recalibrate the instrument using the Open Short Load standard The maximum allowable input level of the instrument is 25dBm gt Do not connect the RF Out port of the instrument directly to the output port of the system An over power input degrades the performance of the instrument and may cause a malfunction of the instrument Do not connect the instrument to the antenna when there is a risk of lightning Electri
33. N 8 4 TABLE OF CONTENTS i 3 APPENDIX C SPECIFICATION 0ccccececceccccecccecccceneeccccenenceneuuenceneaueneauententateneaneaeeneaueneanentautaneneentanentaneneens 8 5 APPENDIX D VSWR RETURN Loss CONVERSION IApLE n nanaaannnnnnnnannnnnnnnnnnnnnennnnrnnnnnrnnnrrrnnnrnnnrrrrnnnrrnnnrrrne 8 6 ORDERING INFORMATION EEN 8 7 4 LIST OF FIGURES LIST OF FIGURES Figure 1 System E 2 20 Figure 2 Language Selection Green 2 23 Figure 3 Trace Screen Dieplay treneren nenn 2 31 Figure 4 Initialization Gcreen antr rnnnennn tenent eet 2 33 Figure 5 SE 2 34 Figure 6 VSWR Measurement Display rrrnrrrrnnrnnnnrnnnnvnnnrvnnrnnnnennnrnnnnvnnnnrnnnnrnnnennnennnnennnenvnnvnnnnsenn 3 5 Figure 7 Calibration for VSWR measurement rnrn 3 9 Figure 8 Connection for VSWR Measurement rrrnrnnnnrnnnnrnnnrrnnnrrnnrrnnernnnrennernnnnrennernnnrennrennsennnse 3 11 Figure 9 Using Markers in VSWR Measurement Mode AA 3 13 POWE TO bl LING ale ie e EE 3 13 Figure 11 DTF Measurement Display serrrovrroonernnvennnennrennennnennnennrrnnnennnennnennnnnuennnennvennvsnnvennuennnen 4 4 Figure 12 Calibration for DTF measuremment Aa 4 8 Figure 13 Connection Diagram for DTF Measurement ranrrnnnnnnrnnnnnnnnnnnnnrnnnnnnrnnnrnrrnnrrennrnneennnnn 4 10 Figure 14 Using Markers in DIF Measurement Mode ccoccccoccconcccnncccncccnncconcncnncnoncncnnncconencnncnnnors 4 11 Figure 15 Limit Line Application
34. N LOSS Chapter 3 A very long run of coaxial cable especially at a frequency where the cable itself is loose can appear to a radio as a matched load The power coming back is in these cases partially or almost completely lost in the cable run In telecommunications return loss is a measure of power reflected from imperfections in an electrical or optical communication link The ratio Pr Pr represents the wave power reflected from the imperfection Pr to that of the incident or transmitted wave Pr For maximum transmitted power the return loss should be as small as possible meaning the ratio Pr Pr should be as small as possible Return loss is usually expressed in dB the return loss value describes the reduction in the amplitude of the reflected energy as compared to the forward energy It will always be a loss and therefore a negative dB However one can write 3 dB as simply 3 dB of loss dropping the negative sign and adding loss For example if a device has 15 dB of return loss the reflected energy from that device Pr is always 15 dB lower than the transmitted energy Pr When expressed in dB larger in magnitude negative numbers represent larger return losses and thus smaller reflected power Pr In electrical systems return losses often occur at junctions between transmission lines and terminating impedances It is a measure of the dissimilarity between impedances in metallic transmission lines
35. REMENT Display Overview The screen shown in the following figure is displayed when Cable Loss measurement mode is selected The frequency range is shown on the X axis while the power loss is shown on the Y axis Measurement Limit Line amp Limit Level Info Mode eae Pass Range GenComm Co Ltd Amplitude 2008 10 22 17 35 17 Labie Lossti Fort ic 0 00 2008 10 22 17 33 51 Point Min BOTTOM 501 Point Average 2 16 Span 1700 00 Mhz Limit Level 2122 ST SN 2 22dB 1650 00 MHz Fail Range Band Name Custom p 17 33 51 Calibration completed Figure 18 Cable Loss Measurement Display Calibration Info Displays the calibration state of the measurement frequency band that a user has selected When the instrument is first turned on the status is CAL OFF The indication CAL ON is displayed along with the calibration time and frequency band after successful completion of calibration Trace Point Sets the data points or resolution to measure the trace The following trace point sets can be selected e 126 251 501 1001 Trace Average Indicates the average value of a single sweep over the user setting frequency band Freq Span User defined frequency band Changing the frequency band doesn t affect the sweep time but affects the calibration Recalibration is required if the frequency setting is changed Freq Band Info The band name is displayed if the band is selected from the
36. S Trace Point Chapter 2 2 26 GETTING STARTED NUMERIC DATA ENTRY SPECIFIC FUNCTION KEYS Auto Scale Auto Scale Amp Chapter 2 i Multi keys operate as follows when a user is prompted to input values by pop up windows Numeric keys from 0 to 9 are used to input numeric values he plus minus key is used to assign positive or negative values to numbers The period key is used to input numbers with decimal points Keys are used in VSWR DTF and Cable Loss measurement mode Unless otherwise specified multi keys are not supported in Power Meter mode The instrument can automatically set the scale to the minimum and maximum values of a measurement on the Y axis of the graph for optimum display of the traces Every time the AUTO SCALE key is pressed the top and bottom scales are set to the minimum and maximum values with margin on the Y axis of the screen display AMP amplitude defines a manual setting for the scale on the Y axis of the graph It can be selected in VSWR DTF and Cable Loss measurement mode Depending on the choice of an amplitude unit allowable input value is limited to the following VSWR Y scale Max Top Entry values can be from 1 01 to 65 00 and it cannot be equal to or smaller than the Min Bottom setting value Adjustment can be made in steps of 0 01 Min Bottom Entry values can be from 1 0 to 64 99 and it cannot be equal to or larger than the
37. ace Trace Select Trace Capture Nr Trace View Clear Write i Trace Clear OF Trace Clear All i Peak Right cc Peak Left me Peak Max Search NE Min Search Chapter 2 GETTING STARTED 2 15 me Screen Menu Function Key Multi Key VSWR Load Load Trace DTF Load Screen Cable Loss Load Setup File Manager Delete Delete All Copy to USB Copy All to USB Destination T1 12 13 14 Save Screen im enra PM SG Load Load Screen Load Setup File Manager Delete Delete All Copy to USB Copy All to USB Save Screen Im open Table 4 Menu Structure Common to all measurement modes Selected Trace number will be highlighted Chapter 2 2 16 GETTING STARTED VSWR MENU The following is the VSWR hard key and soft key menu structure Screen Menu Function Key Multi Key s ra morte sm Band List Standard Band Select Add to Custom Page Up Page Down Custom Band Select Delete Delete All Page Up Page Down m sae vm Table 5 Menu Structure Used for VSWR Measurement mode Chapter 2 GETTING STARTED DTF MENU Screen Menu sanra OOOO Er omme Function Key DTF Freq Dist Band List Standard Band Custom Band Cable List Standard Cable Custom Cable DTF Setting Apply Velocity Cable Loss Unit Windowing 2 17 The following is the DTF hard key and soft key menu structure Select Add to Custom Page Up Page Down Select De
38. aces Chapter 7 7 12 SAVE amp LOAD LOAD SCREEN This function recalls and displays a saved screen The measurement currently under processing is continued in the background but it is not displayed on the screen Pressing any key removes the loaded screen and the measurement screen being processed in the background shows up GenComm Co Ltd Marker 2008 10 22 15 50 56 Youn Youn Tag Marker Select gt 2008 10 22 15 45 38 M6 Point Marker View 501 Point S OFF ON Average 1 36 Span Marker Type 400 00 MHz Normal Delta Band Name Y Al hH AA Lt ait Hr 1 YI Custom IN NM NNN TN Ill NA EL A ll ELEN A TN rh E WEE Viet deg unhuet ELLE JE Ur I Marker Clear All 1 00 2100 00 2300 00 MHz Marker Edit gt 15 45 38 Calibration completed Figure 34 Load Screen MEMORY TYPE This menu designates the area used to recall Trace Screen and Setup Two types of storage areas are available as follows Internal Selects the files stored in the internal memory of the instrument A list of files stored in the internal memory is displayed when Load Trace Load Screen or Load Setup is selected while the memory type is set to Internal In case the user selected file is not available an error message is displayed on the messaging window and the file list is not shown USB Selects the files stored in external USB memory A list of files stored in the external USB memory is displaye
39. aces Displays up to 4 traces in one screen Supports up to 6 markers simultaneously INTRODUCTION 1 5 SAFETY INFORMATION SAFETY SYMBOL The following safety symbols are used in this document to avoid personal injuries and any damage to the instrument Warninq WARNING denotes a hazard It calls attention to a procedure practice or Q the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond WARNING sign until the indicated conditions are fully understood and met Caution CAUTION denotes a caution lt calls for attention to a procedure or practice which if not performed correctly could result in a partial or totally damage of the instrument Do not proceed beyond a CAUTION indication until all the conditions are fully understood and met Notice NOTICE denotes additional information or direction of operation of the instrument f Chapter 1 1 6 INTRODUCTION INPUT POWER amp OTHER INFORMATION Chapter 1 The allowable line input voltage is AC 110V to 250V There is no need to select the input line voltage No separate safety fuse is provided with the instrument Item Specification Regulated Input 100 250V AG 50 60 Hz AG Adaptor Regulated Output 15VDG 3 3A 49 5W Instrument Power Consumption 15VDG 1 2A 18W Max Table 1 Input Power Requirements O When using the AC adapter only connect the plug to a properly grounded receptac
40. and loads For devices that are not perfect transmission lines or purely resistive loads the return loss value varies with the frequency of the transmitted signal VSWR DISPLAY Trace Point Trace Average Freq Span Freq Band Info Captured Trace Info VSWR l 3 5 STARTING VSWR MEASUREMENT Display Overview The following figure is a screen example when VSWR measurement mode is selected Various kinds of information related to the VSWR measurement are shown on the screen Measurement Limit Line amp Limit Level Info MOCE Sone Fail Range GenComm Co Ltd 2008 10 21 22 03 37 0 00 bn L 08 10 21 22 00 28 Point 501 Point Average 12 21 Span 3975 00 MHz Band Name Custom 2012 50 MHz 22 00 28 Calibration completed Pass Range Figure 6 VSWR Measurement Display Calibration Info Displays a calibration state on the measurement frequency band that a user has selected When the instrument is first turned on the state is CAL OFF The symbol CAL ON is displayed along with the execution time and frequency band after the calibration is successfully completed Trace Point Sets the number of data points to take during a measurement mode The Trace Pont sets available are the following e 126 251 501 and 1001 e Selecting 501 data points provides twice as many measurement points as 251 but it takes approximately twice as long for the trace to sweep and di
41. ata Frequency Start Stop Center Freq and Span Trace Point 126 251 501 1001points Y scale Top Bottom Y scale unit VSWR Return Loss Band Frequency band name Marker Type Position Limit On Off status and Limit Line DTF Distance Setting 0 1250m 4125feet Cable Setting Cable name and its characteristics Y scale Setting Top Bottom Y scale unit Setting VSWR Return Loss Custom Cable Parameter User setting Propagation Velocity Setting and Cable Loss value Rectangular Blackman TypelPosiion On Off status and Limit Line Two port CAL data On Off status and Voltage Status Type Limit Line RF In Atten Recalling previous RF In Attenuation Type Position Power Meter Start Stop Center Freq and Span Average Relative setting Reference level setting Display range setting External offset setting Status High Low settings Table 24 Saved Parameters in each Measurement Mode Chapter 7 7 8 SAVE amp LOAD LOAD TRAGE Chapter 7 LOAD The instrument provides the following save functions Load Trace Loads a captured trace from a data file The file name extension is tra Load Screen Loads a display screen Load Setup Loads a user setup configuration Loading data can be either done from the internal memory or from the external USB memory File manager provides following menu to copy or delete the data of the instrument Delete Delete the selected file Delete All Delete all
42. atic Discharge Precautions ccccccececeeeeeeceeeceeeeeeeeeseeeeeeeeseeeeeeeeseeesaeeeseeeeseeeseeesenees 1 7 i Chapter 1 1 2 INTRODUCTION Ny GC723A GC724B Chapter 1 OVERVIEW A large number of abnormal cell site problems are typically caused by the antenna system cable and connectors or both It s important to have the right instrument available when either servicing or certifying cell sites for operation The GC723A GC724B Cable and Antenna Analyzer is a lightweight portable diagnostic tool needed to accurately detect operational problems The GC723A GC724B has all of the measurement functions necessary to accurately verify antenna systems from VSWR to power measurements In addition the GC723A GC724B makes distance to fault measurements to accurately pinpoint the fault s location Touch panel operation and a 7 inch wide TFT color display allows measurements to be easily made and displayed on the GC723A GC724B Its application specific software allows for the user to easily compare and analyze measurements and generate reports A rechargeable and field installable lithium ion battery offers a continuous field operation of the GC723A GC724B for up to three hours KEY MEASUREMENTS KEY FEATURES INTRODUCTION 1 3 GC723A GC724B HIGHLIGHTS The Cable and Antenna Analyzer s key measurements are UY VSWR Distance to Fault Cable Loss Power average and peak The Cable and An
43. be at least 30Mbytes spaces available on the USB O in order to perform the upgrade placed on a USB in the root directory Otherwise the instrument O The zip file should be unzipped and the gen file should be may not be able to read the firmware file from the USB Chapter 2 GETTING STARTED 2 23 LANGUAGE The instrument supports multiple languages The following procedure SELECTION changes the language setting GenComm Co Ltd Select 2008 10 21 22 11 55 Select Language Device Version 2 20 L Light 100 Keypad Beep Off Sleep Time Off Battery Status 97 Language English System Temperature 5 Serial Number 082666 Optional Module BiasT MAMAS Return 22 11 21 Screen data loaded 2 10 jpg Figure 2 Language Selection Screen Action Note 1 Press the SYSTEM key Function hard key 2 Select the Instrument Setting menu Soft key 3 Select the Language screen menu Soft key 4 Select the language by pressing the Hard key Up Down Arrow key 5 Press the ENTER key or Select Hard key or Soft key Table 10 Language Selection Procedure Language changes apply to menus messages and information displayed on the screen after restarting the instrument Chapter 2 2 24 GETTING STARTED SYSTEM TIME The instrument provides real time clock powered up by a separate internal battery to maintain the timing information even when the battery is fully discharged or the sy
44. by displaying the relative distance of the signal reflections or discontinuities from various points of the transmission system DIF l 4 3 DTF In DTF measurements the instrument transmits a test signal along the MEASUREMENT conductor or transmission medium If the conductor is of an uniform CONCEPT impedance and properly terminated the entire transmitted pulse will be absorbed in the far end termination and no signal will be reflected toward the instrument Any impedance discontinuities will cause some of the incident signal to be sent back towards the source A higher impedance create a reflection that reinforces the original signal whilst a lower impedance create a reflection that opposes the original signal The resulting reflected signal that is measured at the output input to the instrument is displayed or plotted as a function of time and because the speed of signal propagation is relatively constant for a given transmission medium it can be read as a function of cable length or distance location Because of this sensitivity to impedance variations the instrument may be used to verify cable impedance characteristics splice and connector locations and associated losses and estimate cable lengths or faulty location FREQUENCY Frequency domain reflectometer are commonly used for testing long DOMAIN cable runs where it is impractical to dig up or remove what may be over a REFLECTOMETER kilometer cable length They
45. c shock may cause a malfunction or damage the instrument Adjust a trace point to change the resolution of the VSWR measurement Changing the Trace Point doesn t affect the calibration state Press the AUTO SCALE key to optimize the Y scale and display the entire trace Press the AMP key to set the maximum and minimum values on the Y scale manually Press the SCALE key to select the display unit of the Y scale Scale adjustment doesn t affect the calibration state Markers can be set on the trace s to indicate the location All the information such as X and Y axis are provided in the marker table at the bottom of the screen USING LIMIT LINE VSWR 3 13 Marker GenComm Co Ltd WEI HOLD Mor YO TI Yon A 2008 10 22 15 50 56 2 00 Marker Select gt 0 22 15 45 38 2008 41 00871072 5 2100 00 2500 00 Point Marker View 501 Point OFF ON Average 1 36 Marker Type Span 400 00 MHz Normal Delta Band Name Custom Marker Clear All 00 2100 00 2300 00 MHz Marker Edit 15 45 38 Calibra tion completed Figure 9 Using Markers in VSWR Measurement Mode By setting a limit line it is easy to verify if a measurement exceeds a specified limit A limit lines appear as a horizontal line at the set value An alarm sound is generated when a trace exceeds the limit line and the exceeded portion is displayed in red color GenComm Co Ltd e Ampl
46. color However the captured trace by using TRACE function doesn t discriminate the color even if the trace exceeds the limit line Calibration Info Displays a calibration state on the measurement frequency band that a user has selected When the instrument is first turned on the state is CAL OFF The indication CAL ON is displayed along with the execution time and frequency band after the calibration is successfully completed Maximum Distance Displays the maximum measurable distance within the user setting frequency band Setting a narrow frequency band will increase the measurable distance while setting a wide frequency band will decrease the distance DIF l 4 5 Measurement Mode amp Scale Unit Is the measurement unit of the Y axis that the trace is displayed e Return Loss dB e VSWR Freq Span Is the user defined frequency band Changing the frequency band doesn t affect the sweep time but affects the calibration Recalibration is required if the frequency setting is changed Freq Band Info The band name is displayed if the band is selected from the band list stored in the instrument If the user sets the start stop center or span frequency manually the band name will show CUSTOM Cable Info The name of user selected cable is displayed on the screen A cable name is displayed if the cable is selected from a Cable List stored in the instrument If the user sets the Velocity and Cabl
47. d when Load Trace Load Screen or Load Setup is selected while memory type is set to USB In case the user selected file is not available an error message is displayed on the messaging window and the file list is not shown Chapter 7 PPENDIX 8 1 8 0 APPENDIX P this chapter APPENDIX BAND LIST o eee 8 2 APPENDIX B Caper 8 4 APPENDIX C SPECIFICATION rannnnnnnnnnnnnnrnnnnnnnrnnnnnnnne renn enn 8 5 APPENDIX D VSWR RETURN LOSS CONVERSION IapLrt 8 6 ORDERING INFORMATION 8 7 Appendix 8 2 BAND LIST APPENDIX A BAND LIST Band Name Stop Freq MHz BlueTooth USA amp Europe 2 484 BlueTooth JAPAN 2 497 C450 P UP 464 C450 P DOWN 474 C450 P FULL 474 C450 SA UP 470 C450 SA DOWN 460 C450 SA FULL 470 CDMA CHINA UP 915 CDMA CHINA DOWN 960 CDMA CHINA FULL 960 CELLULAR UP 849 CELLULAR DOWN 894 CELLULAR FULL 894 GELLULAR 700 UP 794 CELLULAR 700 DOWN 764 CELLULAR 700 FULL 794 DCS GSM 1800 UP 1 710 1 785 DCS GSM 1800 DOWN 1 880 DCS GSM 1800 FULL 1 880 DMB 2 693 GSM 900 UP 915 GSM 900 DOWN 960 GSM 900 FULL 960 IEEE 802 11 FH 2 495 IEEE 802 11 DS 2 484 IEEE 802 11b 9 2 484 IMT2000 UMTS WCDMA UP 1 980 IMT2000 UMTS WCDMA DOWN 2 170 IMT2000 UMTS WCDMA FULL 2 170 ISM 2 4GHz 2 484 JTACS NTAC_JPN ARIB UP 925 JTACS NTAC JPN ARIB DOWN 870 JTACS NTAC JPN ARIB FULL 925 NMT 411 UP 420 NMT 411 DOWN 430 NMT 411 FULL 430 NMT 451 UP 460 NMT 451 DOWN 470 NMT 451 FULL 470 NMT 451 20kHz CDMA2k UP 484
48. data from the sensor Frequency Sets the frequency of signals to measure As the frequency setting affects the calibration data be sure to set the accurate center frequency for reliable measurement results Display Setup Sets the following items Chapter 6 6 4 POWER METER Sets Display Value in Absolute or Relative Sets Reference Level to be used in Relative display mode Sets Display Minimum and Maximum Range Setting External Offset Enters the value of Gain or Loss when an attenuator or an amplifier is used before the power sensor As the default setting is Loss enter the level of Loss in positive values when an attenuator is used and in negative values when an amplifier is used Reset Clears all user settings and returns to the factory settings Mode Selects display mode Average Peak and VSWR Chapter 6 POWER METER 6 5 CONNECTING POWER SENSOR Selecting the Power Meter function after power up the instrument will display the Power Meter measurement screen without power sensor information dashed line of Model S N Type etc GenComm Co Ltd 2008 12 09 19 26 37 rower Meter Initialize Preset a Frequency 0 5 Se anze 2 r Limit Setup gt Max dB Min dB Frequency 500 00MHz Ext Offset 0 00dB Reset Mode gt Figure 24 Power Meter Screen before Connecting Sensor Connect a power sensor to the RS 232C interface port of the instrument
49. e Menu Set 2008 10 21 22 03 37 LOSS 0 00 2008 10 21 00 28 25 00 4000 00 Trace i Point Information OH Limit Level 15 85 Min BOTTOM Screen Menu Average 12 21 Span 3973 00 MHZ Band Name Custom Limit Level 15 85dB 2012 50 MHz Marker Information 22 00 28 Calibration completed Message Window Chapter 2 GETTING STARTED f 2 11 BATTERY Indicates the status of the internal battery INDICATOR Indicates the instrument is using an external power supply The internal battery is charged when an external power supply is connected F Indicates the instrument is using the internal battery and shows the remaining battery capacity This warning message appears when a battery is not installed in the instrument MEASUREMENT Indicates the current measurement mode The selected mode is displayed MODE in yellow DATE AND TIME Indicates the system clock information SCREEN MENU Indicates the selectable screen menu Selection of the menu can be made SET by pressing the soft key or touching the screen menu directly TRACE Calibration On Off Status INFORMATION Calibration Information Calibrated frequency band and timing Trace Points Trace Average applicable to VSWR and Cable Loss measurement mode only Span Band Name Cable Name applicable to DTF measurement mode only Max D Maximum measurement distance limited by the defined
50. e Loss manually the band name will show CUSTOM The following information is also displayed e Rel Propagation Velocity The relative propagation velocity for the cable type selected by the user from the Cable List or manually set by selecting the Velocity key e Nominal Attenuation The loss per distance of the cable selected from the Cable List or manually set by the Cable Loss key By using the application program supplied with the instrument ON users can store custom cable characteristics into the instrument For details refer to the Application Program GC Viewer i Chapter 4 4 6 DTF DTF SETUP Chapter 4 fi Set the parameters for DTF measurements The following is the user setting parameters for DTF measurements Frequency Setting Sets the start and stop frequency to make a measurement If a specific frequency band has been set in VSWR measurement mode it can be applied to DIF measurement To change the maximum measurement distance or increase the measurement resolution is necessary to change the frequency setting Distance Setting The maximum measurable distance is displayed on the left side of the screen depending on the frequency setting Any value within the maximum measurable distance can be set Optimum resolution is achieved when the user setting distance is the same as the maximum measurable distance Cable Setting Selects a cable type of the feed line By using this key users can
51. e latest firmware version has been installed Contact GenComm s sales representative to obtain the latest firmware version released Verify the systems temperature is within the operating range Depending on the storage condition the temperature of the instrument at power up may be out of normal operating range in winter or summer season Measurements over the operating temperature range may be out of resolution GenComm Co Ltd 2008 11 11 09 44 06 Device Version 2 20 Last Build Time 2008 09 22 09 04 10 Light 50 Keypad Beep Off Sleep Time Off Battery Status 98 Language English System Temperature 47 8 Serial Number Optional Module BiasTee enabled Figure 5 System Screen Chapter 2 VSWR 3 1 3 0 VSWR n this chapter io IO EE 3 2 SIMIO Wave AO EE 3 3 Practical implications OF AE E 3 3 POUN Le 3 4 Starting VSWR Measurement ue 3 5 DENNE 3 5 Setting Frequency A 3 7 Cee E 3 9 Making VSWR Mezaeurement Ener EnEEEAEEEEEEA AEREE EEEn Erenn Ennen 3 11 Sel aren dest acneditenee ng acer aent aces bags ocedem tet Aeotacenaent aces Meat piece acannon iceeaes 3 12 EE 3 12 TE EE 3 12 Gale AE g OE EE E 3 13 Chapter 3 3 2 Chapter 3 VSWR INTRODUCTION A proper RF emission in cell sites is achieved with a maximum power transfer from the radio to the antenna where all the transmission media should have an impedance match A mismatch at the antenna system
52. ed to select optional modules which are activated by entering the corresponding license number Chapter 2 2 22 GETTING STARTED UPGRADING It is recommended to upgrade the firmware to the latest version in order to FIRMWARE achieve the best performance of the instrument Users can easily upgrade the firmware of the instrument by using an USB memory drive Action Note 1 Check the firmware version Check the latest firmware at GenComm s website www gcim net 2 Download the firmware to an USB memory drive 3 Turn on the instrument Plug the USB memory stick into the instrument USB port after the system initialization 4 Press the SYSTEM key 5 Select the Upgrade screen menu The file list will be displayed dk_1698 gen 4576987 14 08 2008 10 49 56 dk 1689 gen 5281408 13 08 2008 19 57 18 dk 1701 gen 4581969 06 08 2008 10 21 14 7105 1991 gen 4939545 28 07 2008 13 29 54 6 Select the Upgrade source file gen from the list then press Select Once the upgrade starts the progressing state is displayed on the screen After successful completion of the upgrade then reboot the instrument followed by Please Restart Unit message Please Restart the Unit Table 9 Firmware Upgrade Procedure with USB Memory Drive If the instrument is power down during the upgrading process the La instrument may not operate properly Make sure the power is not interrupted during the upgrading process There should
53. ennnnsrnnnsennnssennn 2 10 A A 2 11 Meas rement 100 escaso NN NE 2 11 BELE WR EE EEE EE xaedaiwnies E 2 11 SE GE APP 2 11 FAEN 2 11 METT L of 1 6 EEE EE NE EE 2 11 MSN 2 11 Stee y Elte AE EEE EEE EE EE 2 12 EES 2 13 COMMON Menton 2 14 VENN 2 16 A a 2 17 es Sk EE EEE EN ee ee eee 2 18 EE EEE ib 2 19 EE 2 20 Upgrading Set AE 2 22 Language SElEChON sano E EE eee eee 2 23 STN 2 24 elo 1852 e VP EEE EEE NE EE NE es 2 24 MAL Sa 2 25 Numere ENN 2 26 Specific Function KEY Socia Gender 2 26 AO EE 2 26 2 26 a 2 27 Trace Data Polar A desde 2 30 VEGG Ao A 2 30 2 TABLE OF CONTENTS MU A E o A 2 31 A PP ee ee ee eee 2 32 Ke ERE EEE REESE EE EPER 2 32 o gt EEE EE ENE ER 2 32 51010 A ss E E E 2 32 o o o A 2 33 Jett E OA asar ooo 2 33 System NAOMI LN sesira A ER scan yed EaR RE AAA i 2 34 A ree ee ee een ee eee eee ee eee 3 1 Inge ie lE e de g EE EE A 3 2 Standing Wave Ratio EE 3 3 Practical implications Of SWR TE 3 3 Kr id et 3 4 Starting VSWR Measurement C rrnrnnnrnnnnrnrnnrvvrnnnrvannrnnnnrnvnnnennnnrnnnnrrnnnnnnnnnsennnnrnnnsennnnrnvnssrnnnnenrnssennn 3 5 Display OE ET NE SEE EE EEE 3 5 Setting Si ne 3 7 See EE EE EE EE 3 9 Making VSWR Mezaeurement rn rnnrrrnnrnnnrnrnnnrrnrnnnnrrrnnnrrnrrrnnrinnrinnnos 3 11 NTP 3 12 EECHER 3 12 NINE 3 12 ite OMILE EE 3 13 o EE 4 1 MP TE DUG TOM nn nn Ann en 4 2 DTF Measurement Concept 4 3 Frequency Domain Reflectometer oooocccoccccnccco
54. ensor connect the power sensor to the output port of the device Attenuator 1 E O ne LJ Ll es erial Interface BYNNE gt gt DC 15V IN RF Out LAN USB GC723A GC724B Cable and Antenna Alyzer Figure 28 HPA High Power Amplifier Output Power Measurement w Terminating power sensor Do not connect the Terminating type of power sensor directly to the output of the HPA The power sensor will be damaged if output power greater than 20dBm is supplied directly POWER METER 6 9 From Amplifier lp IN To Antenna et DC 15V IN RF Out LAN USB Serial Interface Figure 29 HPA High Power Amplifier Output Power Measurement w Directional power sensor Action Note Make a measurement after completion of Power Sensor initialization 1 Connect the DUT to the RF In of the power sensor 2 Initialize Preset Initialize the power sensor 3 Frequency Set the frequency to be measured 4 Display Setup Sets display method in Abs Rel Set Ref Reference level setting information when Relative mode is selected Sets display range Sets external offsets 5 Limit Setup Turns limit line On Off Sets high limit value Sets low limit value 6 Reset Retrieve current measurements 7 Mode Sets display mode in Average Peak and VSWR this menu will only be activated when Directional Power Sensor is identified Table 20 Power Measurement Procedure f Chapter 6 SAVE amp LO
55. est Pa O TA Cable Under Test Figure 20 Cable Loss Measurement Connection Diagram The following is the procedure for Cable Loss measurement Action Note Make a measurement after completion of O S L calibration 1 Connect the cable to measure its loss to the RF Out Reflection port of the instrument 2 Connect the Short standard of the Cal Kit to Cable Loss measurement result is displayed on the the end of the cable to be tested screen Table 18 Cable Loss Measurement Procedure Chapter 5 SCALE ADJUSTMENT USING MARKERS USING LIMIT LINE CABLE LOSS l 5 9 Press the AMP key to set the maximum and minimum values on the Y scale manually Six markers can be used simultaneously Markers can be set on the trace s to indicate the location All the necessary information such as X and Y axis are provided in the marker table at the bottom of screen A marker can be moved to a specific frequency by using the Marker Edit GenComm Co Ltd 2008711708 14 30 46 501 Point Average Limit Level 4 53 Wil E 2 20 AAA A mms ee ma St Band Name Custom 1800 00 2000 00 MHz Marker Marker Select gt Marker View Marker Type Normal Delta Marker Clear All Marker Edit Figure 21 Using Markers in Cable Loss Measurement Mode By setting a limit line it is easy to verify if a measurement exceeds a specified limit A limit lines appear as a horizonta
56. files saved in the instrument Copy to USB Copy the selected file to USB memory stick Copy All to USB Copy all files from the instrument to USB memory stick This function is used to recall multiple traces for comparison purposes The following changes happen automatically when a saved trace is recalled The trace with the different Y scale unit may not be seen on the screen Frequency or distance setting of the instrument must be matched to trace to be loaded Mode of the instrument must be matched to trace file to be loaded The Y scale unit is adjusted automatically to fit into the Y scale of the recalled trace GenComm Co Ltd 10 23 2088 22 27 48 nan Name 1 31 1023103759 tr 11011100 tra 110 tra 4 43 tra 14 tra o default tra 2 tra 1 tra 0 0 gt Mode Range Insertion Loss 2059 00 2259 00 SWR SWR 810 00 1000 00 SWR SWR 810 00 1000 00 SWR SWR 810 00 1000 00 SWR SWR 810 00 1000 00 Insertion Gain 206 1 40 2261 40 SWR RL 810 00 910 00 SWR SWR 810 00 910 00 7 m Interna i Qu ee LD HATT tia 1 j 1 Jj Mel Ad a HILL IN el KO EDO I i I Dis Figure 31 Trace Loading Screen SAVE amp LOAD Date 01 01 1970 00 47 45 01 01 1970 00 29 04 01 01 1970 00 22 21 01 01 1970 00 19 50 01 01 1970 00 13 27 01 01 1970 00 12 01 01 01 1970 00 11 28 01 01 1970 00 10 15 7 9 File List E File Manager gt Destination gt T
57. gure 32 Screen with Multiple Traces cccccseecccssseeceeeeceeeeceeeeeceueeeseeeeeeeueesueessueeenseeessaeessanees 7 9 Figure 33 Marker Display Screen with Multiple Traces cooocccocccocccccocncocnconcncnnnonarononnnonnncnnnos 7 11 Figure 34 Load Screen EE 7 12 LIST OF TABLES 5 LIST OF TABLES Table 1 Input Power Requirements A 1 6 Table 2 GC723A GC724B Accessory et 2 3 Table 3 Menu structure in System mode 2 13 Table 4 Menu Structure Common to all measurement mocdes 0 cece cee ee eee ee eee seeeeseeeeeesaeeeeaeaes 2 15 Table 5 Menu Structure Used for VSWR Measurement moche 2 16 Table 6 Menu Structure Used for DTF Measurement Mode occcccccccncncnconcncnconcnoncnccncnccnnnnnnononnos 2 17 Table 7 Menu Structure Used for Cable Loss Measurement Mode 2 18 Table 8 Menu Structure Used in Power Meter Mode 2 19 Table 9 Firmware Upgrade Procedure with USB Memory Dmve 2 22 Table 10 Language Selection Procedure ccooccccoccccccnconnccncnconncnnnnnnnononnnonnnnnnnnnnnrnnnnnnnnnnnnnnnonnncnnnos 2 23 Table 11 System Time Seting csserinniesn e a Eaa E r Ea iN 2 24 Table 12 Frequency Setting PrOCeQUre ooccoocccccccccocnccncnconncnnnconnnonnnnnnnnnnnnnnnncnnnnnnnrncnnnnnnnnnnnnnnnnnnnos 3 7 Table 13 Calibration Procedure EE 3 10 Table 14 DTF Setup brocedure 4 7 Table 15 Calibration Procedure EEN 4 9 Table 16 Frequency Setting Procedure ree nne 5 5
58. he Band from the list gt Add to Custom Copies a frequency band stored in the Standard Band List to the Custom Band gt Page Up Moves to the previous page gt Page Down Moves to the next page Custom Band Opens the customized Band List stored in the instrument gt Select Selects the Band from the list gt Delete Deletes the selected frequency band from the Custom Band List gt Delete All Deletes all files in the Custom Band List gt Page Up Moves to the previous page gt Page Down Moves to the next page Freq Dist cont d GETTING STARTED 2 29 Cable List Opens a list of coaxial cables stored in the instrument About 110 different kinds of cables are stored in the standard cable list The user can store additional cables to the instrument by using the application software GCViewer provided with the instrument Standard Cable Opens the Cable List stored in the instrument gt Select Selects the Cable from the list gt Add to Custom Copies a cable stored in the Standard Cable List to the Custom Cable List gt Page Up Moves to the previous page gt Page Down Moves to the next page Custom Cable Opens a Custom Cable List stored in the instrument gt Select Selects the Band from the list gt Delete Deletes the selected cable from the Custom Cable List gt Delete All Deletes all files in the Custom Cable list gt Page Up Moves to the previous page gt Page Down
59. is means that it is required to re calibrate the instrument for accurate results CABLE LOSS 5 7 The calibration procedure for Cable Loss measurements is as follows Action Note Performs Calibration after the frequency setting and test cable connections 1 Press the CAL key Hard function key Connect an Open standard then Connect CAL Kit Oper connector to the test cable press Enter When the Open screen menu is selected a progress bar is displayed to show the progress The message Open CAL Complete is displayed at its completion Connect a Short standard then Connect CAL Kit Shorf connector to the test cable press Enter When the Short screen menu is selected a progress bar is displayed to show the progress The message Short CAL Complete is displayed at its completion Connect the 50ohm Load standard Connect CAL Kit Load connector to the test cable then press Enter Wien the Load screen menu is selected a progress bar is displayed to show the progress The message Load CAL Complete is displayed at its completion Calibration state is changed to CAL ON after the Open Short Load calibration Table 17 Calibration Procedure Chapter 5 MAKING CABLE Loss MEASUREMENT The instrument is ready to perform Cable Loss measurement after completion of Open Short Load calibration Connect SHORT Standard to the end of cable under t
60. itude 2008 10 22 15 52 03 TORTS AG LOSZ 10 00 Max TOP 2008 e 10 22 15 45 38 2100 00 2600 00 Point Min BOTTOM 501 Point Average 16 73 Span Limit Level 16 58 400 00 MHz Band Name Custom Limit Level 16 58dB 23 00 2100 00 2300 00 MHz 2500 00 15 51 13 Screen data saved FIG9_ jpg Figure 10 Limit Line Application Chapter 3 DTF 4 1 4 0 DIF P this chapter Jun dee ie dog TE EE EE EE EE 4 2 DTF Measurement KREE gester ee g ss eege eege deeg eege dE 4 3 Frequency Domain Reflectometer A 4 3 Starting DTF Measurement nr rn nn rnnnnnrnnrnnnrrnrnrrnnnnnnnnnnrnnnrnnnens 4 4 DIS EE 4 4 PTE JR EEE EE RE EE 4 6 ee EEE EEE 4 8 Making DIF MASTEN E 4 10 Ses E errante 4 11 be 4 11 o A An 4 12 VIROON e PE o O E RI UE EEE 4 13 i Chapter 4 4 2 Chapter 4 fi INTRODUCTION While VSWR is an indicator to express the efficiency of the cell site energy transmission DTF is a measurement to identify the fault locations in the antenna line system Most of the antenna line system consists of various types of coaxial cables connectors and devices such as dividers and surge arrestors Since VSWR is a measurement to verify the impedance discontinuity of the total feed line system it is necessary to perform DTF measurement to identify the exact component that is contributing to the performance of the line system The DTF measurement makes it easy to identify the fault location
61. l line at the set value An alarm sound is generated when a trace exceeds the limit line and the exceeded portion is displayed in red color GenComm Co Ltd 2008 10 22 17 35 17 Cable Loss 1 Port oint 501 Point Average 2 16 Span 1700 00 MHz Band Name Custom Figure 22 Limit Line Application Chapter 5 POWER METER 6 1 6 0 POWER METER amp RF SOURCE n this chapter 1 Tee EE 6 2 Seting g EE EEE EE EEE 6 3 Connecting Power Gensor nr nnnn nn nn nnnrnnrnnnnnnnrnrrnnnnnrnnrerannnennnnenns 6 5 MELIA 6 8 f Chapter 6 6 2 Chapter 6 Part No GC731A GC732A GC733A GC724A 001 GC724A 002 INTRODUCTION The Power Meter function measures the transmission power of the system This function can be used only with optional external power sensors Two kinds of power sensors are available Directional Power Sensors or Terminating Power Sensors its application depends on the type of transmission power signals to be measured The specification of each sensor is shown in the following table Frequency Range Power Range Average 21 76 51 76dBm 0 15 150W Directional Power Sensor 300 3800MHz Peak 36 02 56 02dBm 4 400W Terminating Power Sensor 20 3800MHz Average 30 20dBm 1uW 100mW Directional Power Sensor 150 3500MHz 24dBm 43dBm 0 25W 20W Average Power Sensor 20 3000MHz 0 30dBm Terminating type Peak Power Sensor 20 400
62. l of previous entered name press Clear To delete previous entered name one by one press Back Space 5 Press the Done key Press Done for save changes Press Cancel to exit without save changes Table 22 Screen Saving Procedure Chapter 7 7 6 SAVE amp LOAD SAVE SETUP This function is to save the user setup configuration and the calibration data Up to 20 setups can be saved in the internal memory Action Note This function is available in VSWR DTF and Cable Loss measurement mode 1 Press the SAVE key Multi key 2 Select the Memory Type Select either an internal memory or an external Internal USB USB memory 3 Select the Save Setup screen menu Screen menu key 4 Assign the File Name User enters the file name manually using the keyboard on the screen To delete all of previous entered name press Clear To delete previous entered name one by one press Back Space 5 Press the Done key Press Done for save changes Press Cancel to exit without save changes Table 23 Setup Saving Procedure Saving a setup is based on the procedure shown in the above table The instrument setting can be configured by loading saved setups The following table summarizes the parameters saved in setup Chapter 7 SAVE amp LOAD 7 7 Measurement Mode Parameters Remarks VSWR CAL On Off status Cable Loss CAL Data Recall preceding calibration d
63. le Serious injury or death can occur if grounding is not properly installed h Always use the AC adapter supplied with the instrument GenComm doesnt assume any responsibility for incidents caused by using other power supplies Disassembly of the electric parts inside or outside of the instrument may cause instrument damage GenComm doesn t take any repair responsibility for the damage or malfunction of the instrument caused by an unauthorized disassembly even in the warranty period Do not apply RF power exceeding 25dBm to the RF Out Reflection port of the instrument Exceeding the maximum input will damage the instrument To avoid damage to the display or the case do not use solvents or abrasive cleaners explosion Use only the same or compatible type of battery Q Incorrect connection of the internal Li lon battery may cause supplied by the manufacturer Dispose the battery according to the safety guide ELECTROSTATIC DISCHARGE PRECAUTIONS INTRODUCTION This product was manufactured in an ESD protected environment Semiconductor devices used in this product are susceptible to damage by static discharge Depending on the magnitude of discharge semiconductor devices may be damaged by direct contact or mere proximity of a static charge This result can cause the degradation of the performance early failure or immediate destruction Please use the following guideline to prevent ESD damage Before connec
64. lete Delete All Page Up Page Down Select Add to Custom Page Up Page Down Select Delete Delete All Page Up Page Down Meter Feet Rectangular Blackman Table 6 Menu Structure Used for DTF Measurement Mode Chapter 2 2 18 GETTING STARTED CABLE LOSS The following is the Cable Loss One Port hard key and soft key menu MENU structure Screen Menu Function Key Multi Key Gain Loss gt Freg Dist StatFreq omna e Band List Standard Band Select Add to Custom Page Up Page Down Custom Band Select Delete Delete All Page Up Page Down w Table 7 Menu Structure Used for Cable Loss Measurement Mode Chapter 2 GETTING STARTED i 2 19 POWER METER The menu structure of the Power Meter or Signal Generator hard function MENU key and multi keys are shown below Screen Menu Function Key Multi Key Display Setup Display Abs Rel Set Ref Disp Max Disp Min External Offset Limit Setup ON OFF High Limit Reset Table 8 Menu Structure Used in Power Meter Mode Chapter 2 2 20 GETTING STARTED SYSTEM KEYS Provides information about the system or changes the instrument s settings Selecting the system key shows the following information m Firmware Version Device Version Display Brightness Keypad beep On Off Sleep Mode setting time to sleep mode Battery charge indicator Selected language System temperature GenComm Co
65. ment exceeds a specified limit A limit lines appear as a horizontal line at the set value An alarm sound is generated when a trace exceeds the limit line and the exceeded portion is displayed in red color GenComm Co Ltd Amplitude 2008 10 23 23 49 52 98 meter Span I 250 00 MHz Band Name Custom Se TTT Custom YT 0 690 CL 0 1350 Distance a Meter y 23 49 19 Screen data saved 14 jpg DT Max TOP Min BOTTOM Limit Limit Level 1 10 OFF ON Limit Level Figure 15 Limit Line Application DIF 4 13 WINDOWING If the video filter is activated by selecting the different types of Windowing filters Rectangular or Blackman the overshoots of the trace are reduced by smoothing out the sharp transitions thereby enabling users easy to discriminate noises and peaks Figure 17 is the result of applying Blackman window to the trace on Figure 16 Rectangular filter default Noises around peaks are reduced and distance to the fault location is clearly verified GenComm Co Ltd 2008 07 31 17 36 27 245 meter Point 1001 Point Span 200 00 MHz Band Name Custom Cable Custom YT 0 690 CL 0 1350 GenComm Co Ltd OTI is 2008 07 31 17 36 27 Dir gt Return Lo fu Max Distance 245 meter Point 1001 Point Span 200 00 MHz Band Name Custom Cable YT 0 690 CL 0 1350 istance Meter 2008 07 31 17 36 14 DTF 2 SCREEN SAVE OK
66. n for DTF measurement To minimize measurement errors connect the port extension cable to the RF Out port on the instrument and then connect the Cal Kit to the end of the extension cable If temperature changes by 10C or more from the temperature O registered during calibration then the calibration status will not be valid and CAL OFF T will be displayed This means that it is required to re calibrate the instrument for accurate results DIF 49 Figure 12 shows the connection diagram for calibration using a test cable To compensate measurement errors due to the test cable or adapters perform the Open Short Load O S L calibration including the test cable For detailed calibration procedure refer to the Calibration Procedure Bending or moving the phase unstable cable while making a O measurement may cause errors in the measurement The test cable used for port extension must be phase stable in the measurement frequencies At the successful completion of each calibration step a message is displayed with a beep sound Following is the calibration procedure for DTF measurement Action Note Performs Calibration after the frequency setting and test cable connections 1 Press the CAL key Hard function key 2 Connect an Open standard then Connect CAL Kit Oper connector to the test cable press Enter When the Open screen menu is selected a progress bar is displayed to show the progress The message
67. ncccnncnnncononcnoncncnncnnnnnnonrnnonrnnnrnnonnronrnrnnrrnnarennenos 4 3 Starting DTF ENE tE rArEEAEEEAEEEAEEESEEEEEEEEn EEEE EEn EEen neen 4 4 Be EE 4 4 EE 4 6 ee EEE EEE DE EEE OE EE eee ee 4 8 Making DTF NE ANN 4 10 e nn ee E eee ee ee eee 4 11 E E EE R E e E EN 4 11 IIA LING E 4 12 ONIN WEE 4 13 DU C ADLE E 5 1 es iert EE 5 2 nn es stunrnesdmenseteemaeenetemeesanmunicodaee 5 3 Ieren He 5 3 Starting Cable Loss Measurement ooccccoccnccncncocncncccnnononcncnnnnnonncnnnnnnnonnrnnnnnnnnrnnnrrnnrnnnnnnrrnnrnrrnnrnnnnanes 5 4 Bee EEE EE EE EN 5 4 Setting gl ne 5 5 A 5 6 Making Cable Loss Measurement ccccceecceeeceeeeeeeeeeeeceeeeaeeseeeeseeseeeeseeeseeeeseeeseeeeseeeseeeseneeaaes 5 8 TENNER 5 9 EE OE EE EE 5 9 e e mg EE 5 9 6 0 POWER METER amp RF Goupck ro nnnnnrnnnrnrnrnrnnrrnnnnnnrrnrrnnnrnrinnrrrnninnenns 6 1 io PPP PP PES ONE EE 6 2 Ms AA A 6 3 Connecting Power AN cito 6 5 Making Power Measurement assi n See ce Gta vetisede erresmneetumetednicede cose veheOndvestemencnctuaretiecdia 6 8 7 0 SWE EE 7 1 ias g E 7 2 NN 7 3 SVT 7 3 SGEN esre airen RAR EE R E R ER E E R NS 7 5 A 7 6 Bette II A En e 7 8 Eo ceee EE EEE e EE E 7 8 Using Markers on Loaded Traces ccccccsscccscceceeeceeeceecenseeeeeeesseeeeeeeeseeenseetseeeeaeeteeeeneeeneeens 7 11 o A ee nee en ne A eee ee ee ee eee eee 7 12 nn qn PP E a 7 12 8 0 APPENDIX A Ae g 8 1 APPENDIX BAND E 8 2 APPENDIX B CABLE BC EE
68. ndependently Placing a maker on the trace displays the marker s Y coordinates next to the marker s position If the maker table is turned on both X and Y coordinates of all activated markers are displayed MARKER Marker Select Selects an active marker which its position can be changed with the knob or the arrow keys The assigned number of active markers is displayed in red color on the Select screen menu and the marker s number is also displayed next to the marker on the trace Marker View Hides or displays the selected marker on the screen In the same measurement mode markers appear at the previous positions when the Marker View is turned off and on If a measurement mode has been changed markers are not restored to their previous positions but moved to the left end of the trace Marker Type Selects the type of Marker to be displayed Normal marker provide the reading of its position and Delta marker provides the differences between two sets of marker points Marker Clear All Turns all markers off the screen Markers are redisplayed on the previous position if markers are turned back on If a measurement mode is changed current settings are not restored Marker Edit Sets the marker position manually A pop up window appears for users to set the frequency and the marker position is moved to the defined frequency GETTING STARTED 2 31 Marker cont d Moving Markers e Knob Turning the knob clockwise moves a marker t
69. ns instrument It is desirable to set the frequency to a value that covers the Action Note Setting Center Freq and Span 1 2 3 A S 6 7 Press the FREQ DIST key Select the Center Freq screen menu Enter a center frequency value Press the ENTER key Select the Span screen menu Enter a span value Press the ENTER key Setting Start Stop Frequency 1 2 3 4 D 6 7 Press the FREQ DIST key Select the Start Freq screen menu Enter a start frequency value Press the ENTER key Select the Stop Freq screen menu Enter a stop frequency value Press the ENTER key Multi key The current setting is displayed on the window CENTER FREQUENCY 860 00MHz The current setting is cleared when a new value is entered The frequency input unit is in MHz and the minimum input steps is 0 01 MHz Selection from the band list stored in the instrument Press the FREQ DIST key Select the Band List screen menu Select the band from the list and press the Enter key or choose Select Press the Up Down arrow keys or rotate the dial knob to select a band from the list Select the Page Up Down screen menu for searching bands not shown in the screen BAND NAME FREQ MHz BlueTooth JAPAN CUSTOM C450 P UP 2472 00 2497 00 453 00 464 00 463 00 474 00 453 00 474 00 465 00 470 00 455 00 460 00 455 00 470 00 872 00 915 00 917 00 960 00 Table 12
70. o the right and counter clockwise moves it to the left The knob is used to move the marker s position fast e Arrow Keys Pressing the up arrow key 71 moves a marker s position one point to the right and pressing the down arrow key J moves a marker s position one point to the left Arrow keys are used to move a marker s position more precisely As the instrument is equipped with a touch panel screen a marker can be placed to the desired position by simply touching the screen The touch screen will quickly move an activated marker to the desired position and then knob or up down arrow keys can be use to make fine adjustments Trace Captures a trace for comparison with other traces or saves traces 5 GenComm Co Ltd ow Trace VO NH VSWR SE 2008 08 01 16 31 03 ALL AAA Trace 2 OG g Trace Select gt 2008 08 01 15 26 2300 00 2000 00 Trace Capture 1001 Point Average RH N g 2 ES 1 62 Span 200 00 MHz Band Name Custom Clear Write 3 Captu Trace Clear 1900 00 MHz d Trace Clear All 2008 08 01 15 14 26 Cal Completed Figure 3 Trace Screen Display Trace Select Selects an active trace Every time Select screen menu is pressed the active trace changes Trace numbers are assigned to each captured traces or loaded traces Refer to Save Load for procedures to load traces Trace Capture Captures a current trace on the screen and assigns a Trace number Refer to
71. overpowered input may degrade the performance of the or damage the instrument DTF l 4 11 Do not connect the instrument to the antenna when there is a risk of lightning Electric shock may cause the malfunction or breakdown of the instrument O If O S L calibration has been done at the end of the port extension cable for DTF measurement the length of the port extension cable is compensated automatically and is not included in the distance to the point of discontinuity SCALE Press the AUTO SCALE key to optimize the Y scale and display an ADJUSTMENT entire trace Press the AMP key to set the maximum and minimum values on the Y scale manually Press the SCALE key to select a display unit of the Y scale USING MARKERS Six markers can be used simultaneously Markers can be set on the trace s to indicate the location All the necessary information such as X and Y axis are provided in the marker table at the bottom of screen GenComm Co Lid em _ Marker DIF YOT A 2008 10 23 23 58 27 Mi Max Distance 98 meter Marker View Point Ve 251 Point OFF ON Span 250 00 MHz Marker Type Band Name i Custom Normal Delta Cable Custom YT 0 690 CL 0 1350 AAA Marker Clear All Distance Meter y Marker Edit Figure 14 Using Markers in DTF Measurement Mode i Chapter 4 4 12 i DIF USING LIMIT LINE Chapter 4 fi By setting a limit line it is easy to verify if a measure
72. ower Trans 94 1 93 8 93 6 93 3 93 0 92 7 92 4 92 1 91 8 91 5 91 3 91 0 90 7 90 4 90 1 89 8 89 5 89 2 88 9 81 6 75 0 69 1 64 0 59 5 55 6 521 49 0 46 2 43 7 41 5 39 5 37 7 36 0 34 5 33 1 30 6 28 4 26 5 24 9 23 4 22 1 21 0 19 9 19 0 18 1 14 8 12 5 Power Refl 5 9 6 2 6 4 6 7 7 0 We 7 6 7 9 8 2 8 5 8 7 9 0 9 3 9 6 9 9 10 2 10 5 10 8 11 1 18 4 25 0 30 9 36 0 40 5 44 4 47 9 51 0 53 8 56 3 58 5 60 5 62 3 64 0 65 5 66 9 69 4 71 6 735 75 1 76 6 77 9 79 0 80 1 81 0 81 9 85 2 87 5 ORDERING INFORMATION 8 7 ORDERING INFORMATION Basic Model GC723A Cable and Antenna Analyzer 100 2700MHz GC724B Cable and Antenna Analyzer 25 4000MHz Standard Accessories GC723 50541 Soft Carrying Case GC724 50522 G7105 50335 GC724 50517 Automotive Cigarette Lighter 12V DC Adapter Lithium lon Battery Stylus Pen User s Manual and Application Software CD GC724 50523 GC724 50321 G7105 50316 GC723 50561 Optional Accessories GC725 50509 GC724 50531 GC724 50532 Hard Case GC723 50542 GC723 50562 Adapter Nim to DIN f DC to 4GHz 500 G7000 50571 G7000 50572 AC DC Adapter Cross LAN Cable 1 5m 1GByte USB Memory Calibration Kit N 40dB 4GHz RF Cable 1 5m N m N f m N f RF Cable 3 0m N GC723A GC724B User s Manual Printed Version Adapter DIN m to DIN m DC to 4GHz 500 G7000 5
73. owest point of the trace The Light key is used to adjust the brightness of the LCD display Adjustment can be made from 1 to 100 and the default setting is 100 The Scale key is used to select a unit of Y axis of the graph in VSWR and DTF measurement modes Either VSWR or Return Loss can be selected In Cable Loss measurement mode Return Loss only can be selected The Hold key is used to pause a sweep in all measurement modes The Hold state is activated by pressing the HOLD key and it is maintained even if users change the measurement mode The sweep resumes when the HOLD key is pressed again When Sweep Mode is set to Single in the System screen menu a Hold message is displayed on the screen in red color and the measurement stops at the completion of a single sweep Pressing the HOLD key triggers another single sweep GETTING STARTED 2 33 POWER UP INITIALIZATION Initialization The following initialization screen appears when the instrument is started with the indication System Initialization After a successful initialization data loading and self test the VSWR measurement screen appears a Cable and Antenna Analyzer System Initializing Figure 4 Initialization Screen Chapter 2 2 34 GETTING STARTED SYSTEM Before using the instrument verify the firmware s version and status of the INFORMATION instrument Firmware version For the instrument s best performance make sure th
74. pe RF Ethernet USB Memory Stick D sub serial port Connector Communication port port used for either interface port to maximum allowable to connect a PC saving measurement connect optional input is 25dBm with the application data or upgrading external power software the instrument s sensors firmware Chapter 2 RF OUT RF IN DC15V USER INTERFAGE GETTING STARTED 2 9 RF Out Reflection is an N type Female 500 connector that perform the RF measurements of VSWR DTF and One port Cable Loss The maximum power for RF Out Reflection port is 25dBm If input power exceeds the maximum allowable limit it will degrade the product performance and in worst case can damage the product Do not connect output of the power amplifier exceeding 1W directly to the RF Out Reflection port of the GC723A GC724B 500 N type Female connector in conjunction with the RF Out Reflection port measures Gain and Insertion Loss DC power input port LAN Ethernet communication port to connect a PC with the application sofiware RS232C Serial interface port to connect an optional external power sensor USB USB1 1 master port for external storage devices or to upgrade firmware through the memory stick lt supports most USB memory sticks and 32bit file systems Chapter 2 2 10 GETTING STARTED DISPLAY SCREEN OVERVIEW Measurement Mode Battery Indicator Screen Amplitude Date Time cen omm n Lio VSWR Return Loss or ao
75. produces a reflective traveling wave which goes in the opposite direction from the incident wave As the two traveling waves cross each other in opposite direction it is produce an interference pattern called a standing wave VSWR is the ratio between the power that is sent forward to the cable and or antenna and the amount of the power that is reflected back to the transmitter Some of the consequences of having a high VSWR condition in cellular services are dropped calls poor reception and an overall unacceptable performance in the cell or section of cell covered by the base station antenna Therefore the VSWR of the antenna system including the feed line is one of the most critical factors in the service and maintenance of the RF transmitter systems STANDING WAVE RATIO PRACTICAL IMPLICATIONS OF SWR VSWR 3 3 In telecommunications standing wave ratio SWR is the ratio of the amplitude of a partial standing wave at its maximum amplitude and at its minimum in an electrical transmission line The SWR is usually defined as a voltage ratio called the VSWR for voltage standing wave ratio For example the VSWR value 1 2 1 denotes a maximum standing wave amplitude that is 1 2 times greater than the minimum standing wave value It is also possible to define the SWR in terms of current resulting in the ISWR which has the same numerical relationship The power standing wave ratio PSWR is defined as the square of
76. s measurements positions of items on the table list HOLD ENTER Pauses current AUTO SCALE Inputs measurement display SCALE Adjusts Y scale on umeric Changes Y axis screen for optimal values scale VSWR amp display of trace Return Loss Power amp LED Power ON OFF Green LED LOAD Power On status Recalls saved Red LED traces to compare External power with current or other saved traces TRACE POINT Selects trace points among 126 251 501 or 1001 MARKER Supports six markers for each trace PEAK Identifies the highest LIGHT peak of the trace Sets LCD Brightness AMP pr TRACE Sets Y axis Min Max SAVE Captures up to 4 traces Limit and Limit Level Saves Current FREQ DIST Assign saved trace to Trace Screen Trace Sets frequency range or selects a CH and Setup standard or custom frequency band Sets distance and selects standard or custom cables Chapter 2 2 6 GETTING STARTED POWER SWITCH i S FUNCTION KEYS SCREEN KEYS ENTER KEY Chapter 2 A red LED indicates that an external power supply is connected and a green LED indicates that the instrument is turned on There is no red indication when the instrument is powered by the internal battery The Hard Keys perform the function uniquely assigned to each key VSWR Activates the VSWR measurement mode DTF Activates DIF measurement mode Cable Loss Activates Cable Loss measurement mode Po
77. splay I Chapter 3 3 6 VSWR VSWR DISPLAY cont d Chapter 3 O Selecting trace points larger than needed for the measurement will result in longer sweep times It is recommended to select high resolution trace points only when measuring wide frequency bands or a precise measurement is required The calibration is effective even after the trace points are changed Measurement Mode amp Scale It is the measurement mode and the display unit of the Y axis displayed for the trace e Return Loss dB e VSWR Trace Average Indicates the average value of a single sweep over the user setting frequency band Freq Span It is a user defined frequency band Changing the frequency band doesnt affect the sweep time but affects the calibration Recalibration is required if the frequency setting is changed Freq Band Info The band name is displayed if the band is selected from the band list stored in the instrument If the user sets the start stop center or span frequency manually the band name will show CUSTOM Limit Line amp Level Sets the upper limit value of the trace The portion of the trace that exceeds the limit line is displayed in red color Captured traces will not display the exceeded portion of the trace in different color SETTING FREQUENCY VSWR SE Frequencies can be set manually or selected from a band list stored in the normal range of the measurement with enough margi
78. stem power is disconnected The default time setting at the factory is GMT 9 00 Action Note 1 Press the SYSTEM key Function hard key 2 Select the Instrument Setting menu Soft key 3 Select the Date Time screen menu Soft key 4 Set Date Format YMD MDY DMY Soft key 5 Set Date Time selecting screen menu prompts a pop up APPLICATION I F Chapter 2 window Enter numbers and press the ENTER key Table 11 System Time Setting This function provides the user with the option of two different Application Software programs to communicate with the instrument The selection of GenComm in the APP I F Application Program Interface configuration option allow the user to communicate with the instrument via GenComm s Application Software GC Viewer Refer to Application Software Program for instruction on how to use GenComm s Application Software GETTING STARTED 2 25 MULTI KEYS Twelve multi keys are located under the LCD display The Multi keys serve multiple functions depending on the operation mode The dual purpose keys are indicated in black color and the specific functions in blue color The keys are used to enter a numeric data when a user is prompted to input values In all other cases the keys are used to perform the specific function The function and operating procedure for each multi keys are described in the following sections GenComm GC724B Cable And Antenna Analyzer Pren D
79. tenna Analyzer key features are Rechargeable and infield replaceable lithium ion battery A portable lightweight instrument lt 2 0 Kg 4 4 lbs including the battery Built in worldwide signal standards and frequency channels database 7 inch TFT color display viewable in daylight Easy front keypad operation Superior immunity to RF interference Up to 1001 data points to locate long range problems Built in cable database containing gt 90 cables characteristics User friendly menu structure Saves up to 20 user setups Saves up to 400 measurement traces Saves up to 100 measurement screens Alphanumeric labeling of saved data Automatic Time Date stamp of saved data Up to 6 trace markers RS 232 interface USB Port USB 1 1 Remote firmware upgrade capability Fast one touch selection of menu item or positioning marker f Chapter 1 1 4 INTRODUCTION APPLICATION SOFTWARE SUPPLEMENTARY FUNCTIONS Chapter 1 The GC723A GC724B Application Software GCViewer provides all the necessary tools to operate the instrument more conveniently including Smith Chart conversion VSWR DTF conversion Captures saved plots from the GC723A GC724B Registers or edits user definable RF bands into a Custom bands list Registers or edits user definable cables into a Custom cable list Edits measurement charts Generates and prints reports Captures up to 4 tr
80. ting the cable to the GC723A GC724B terminal short circuit the center of the cable with outside metal shield Before connecting or disconnecting cables wear a wrist strap with 1 MQ resistor connected to ground All equipment must be connected to ground in order to avoid accumulation of static charges 1 7 f Chapter 1 GETTING STARTED 2 1 2 0 GETTING STARTED P this chapter Unpacking The GG123A GO 24B russernes st dechasehsccdhdedetetuassteechepindachsaondedtasdehents 2 2 GC723A GG724B AAA Ge stucdescatesseasaeeeees 2 3 Layout amp Hard Soft EE EE 2 4 Salle 2 5 PFG IM 2 6 o nn o OE OU ds capitate tacsocountecvarcter di castdnte 2 6 Screen KOS rara 2 6 ET 2 6 ENTER 2 6 GE ENE IE o Pe 2 7 MUR e o enti cietdecken stated 2 7 Beie 2 8 FO Pee 2 9 UTV 2 9 USER INTERFACE pent 2 9 Display Screen EE 2 10 A ner emer ents are ener eee nee emer are eee er ee ere ere eer ere eee 2 11 Measurement A 2 11 Dale and NNN 2 11 A samtetenasien cuicatmemneaeiaedretneepeaeccaament semcbeaeneecianaacine seaeueeaer 2 11 Trace MONA EH 2 11 Marker ele un AO EEE AAAA ENARA TAANA 2 11 Message 0 OE EE isbn deidas 2 11 ekke EEE ESE NE r TEE 2 12 SM Screen ege BEE Eegen 2 13 COMMON MEN ea E 2 14 ES MEN EE 2 16 DTE MENI ee A AE 2 17 Cable Loss Menu EE 2 18 EA A acct ana2cesannceaeeepececyaeaedechanen ancusmesoebecapncseeeesises 2 19 EE EE 2 20 UA 2 22 Language Sel Scl Ossa at ocean 2 23 VATNE 2 24 FN il 2 24 MIRA 2
81. to that same part before insertion INSERTION LOSS Insertion loss is the loss of transmitted signal power resulting from the insertion of a device in a transmission line It is usually expressed relative to the signal power delivered to that same part before insertion The insertion loss of a device which may be a whole line may also be referred to as attenuation Line terminations play an important part in insertion loss because they reflect some of the power Apart from this it is clear that not all of the power which is sent into the line at one end appears at the other This is because of radiation losses resistive losses in the conductor as well as losses in the surrounding dielectric The loss which results from inserting a transmission line between a source and a load is called the insertion loss of the line If the power transmitted by the source is Pr and the power received by the load is Pr then the insertion loss is given by Pr divided by Pr For maximum power transfer the insertion loss should be as small as possible In other words the ratio Pr Py should be as close to 1 as possible which in decibels means as close to 0dB as possible In most systems insertion loss is introduced by things such as connectors splitters or couplers Chapter 5 CABLE LOSS CABLE LOSS DISPLAY Trace Point Trace Average Freq Span Freq Band Info Captured Trace Info Chapter 5 H STARTING CABLE LOSS MEASU
82. tput 15V 3 3A DC Cross LAN Cable 1 5m Part No G7105 50335 Cross LAN Cable 1 5m Stylus Pen Stylus Pen Part No G7105 50316 USB Memory Part No GC724 50517 Automotive Cigarette DC Adapter for Cigarette Lighter 12V DC Adapter Lighter Part No GC724 50523 1GByte USB2 0 Li ion Battery LI201SX Part No GC 724 50321 Output DC11 1V 4800mAh User s Manual amp User s Manual and Application Software Application Software CD Part No GC725 50561 Table 2 GC723A GC724B Accessory List Chapter 2 2 4 GETTING STARTED LAYOUT amp HARD SOFT KEYS LAYOUT A a eQ a DC 15V IN RF Out LAN Chapter 2 f GETTING STARTED 2 5 FRONT VIEW 7 Color LCD Daylight viewable high resolution LCD Display GenComm 07248 VSWR Measures impedance res matching d 2009 10 23 22 40 sa E Screen Menu DTF En Selects menu Measures distance displayed on the to fault location E screen CABLE LOSS Measures cable gt Soft Key insertion loss Selects the options E gt displayed in the Wi screen POWER METER Measures transmission ED power ESC Cancels latest SYSTEM TOR selection or moves Identify and or BE to previous menu p 7 SPEAKER q Generates audio if enabled for alarms j and key selections revise system information or upgrade firmware KNOB amp CAL UP DOWN Performs Moves marker calibration for VSWR DTF and Cable Los
83. uW 1mW 10 of reading N Male 0 50 C 32 122 40 80 C 40 176 F 95 No Condensation Specification 8 6 VSWR RETURN LOSS CONVERSION PPENDIX D VSWR RETURN LOSS CONVERSION TABLE Return Loss 20logio VSWR 1 VSWR 1 dB VSWR 1 DR L 20 4 4 ge VSWR Oe CHE CHE CH CH OMNPIPHAMAKON O0 VSWR RL f Conversion Return Loss dB 46 1 40 1 36 6 34 2 32 3 30 7 29 4 28 3 27 3 26 4 25 7 24 9 24 3 23 7 23 1 22 6 22 1 21 7 21 2 20 8 20 4 20 1 19 7 19 4 19 1 18 8 18 5 18 2 17 9 17 7 17 2 16 8 16 3 15 9 15 8 15 2 14 9 14 6 14 3 14 0 13 7 13 4 13 2 13 0 12 7 12 5 Trans Loss dB 0 000 0 000 0 000 0 001 0 002 0 003 0 004 0 005 0 006 0 008 0 010 0 012 0 014 0 016 0 019 0 021 0 024 0 027 0 030 0 033 0 036 0 039 0 043 0 046 0 050 0 054 0 058 0 062 0 066 0 070 0 075 0 083 0 093 0 102 0 112 0 122 0 133 0 144 0 155 0 166 0 177 0 189 0 201 0 213 0 225 0 238 0 250 Volt Refl Coeff 0 00 0 00 0 01 0 01 0 02 0 02 0 03 0 03 0 04 0 04 0 05 0 05 0 06 0 06 0 07 0 07 0 07 0 08 0 08 0 09 0 09 0 10 0 10 0 10 0 11 0 11 0 12 0 12 0 12 0 13 0 13 0 14 0 15 0 15 0 16 0 17 0 17 0 18 0 19 0 19 0 20 0 21 0 21 0 22 0 22 0 23 0 24 Power Trans 100 0 100 0 100 0 100 0 100 0 99 9 99 9 99 9 99 9 99 8 99 8 99 7 99 7 99 6 99 6 99 5 99 5 99 4 99 3 99 2 99 2 99 1 99 0 98 9 98 9 98
84. wer Meter Activates RF Power measurement mode An optional power sensor must be connected to the instrument before using this function System Opens the system screen with the information of the instrument CAL Opens the calibration screen procedure Refers to the menu displayed at the right side of the screen The menu shown on the display varies depending on the selection of Hard Keys or Multifunction Keys Stops an active function or goes back to the previous menu level or exits data entry without changing the value Selects the highlighted item in the list or exits data entry changing the value for test parameters GETTING STARTED 27 KNOB ARROW KNOB is used to change step values defined for limit level or to move the KEYS marker on the trace Rotating the knob clockwise will increase the value or move the marker to the right and rotating it counterclockwise will decrease the values or move the marker to the left Incremental step values are set differently for each function ARROW key increases or decreases an active function values It works almost the same as the knob but allows more precise control MULTI KEYS Enters values shown on the keys for input pop up windows prompted on the screen Opens a menu linked with the functions in blue or directly performs the specified function Chapter 2 28 GETTING STARTED UPPER VIEW DC 15V IN RF OUT LAN USB RS 232C External DC input 500hm N ty

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