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Advanced Channel Emulator

dBm

Operations Manual

ACE600

Co n ve n tio n s Us e d in Th is Ma n u a l

Te xt Co n ve n tio n s

This manual uses the following text conventions:

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Содержание ACE9600

Страница 1: ...Operating Manual ADVANCED CHANNEL EMULATOR ACE9600 RF Test Equipment for Wireless Communications For use with ACE firmware version 0 970...

Страница 2: ...y dBmCorp Inc and all rights are reserved No portion of this document may be repro duced copied transmitted transcribed stored is a retrieval system or translated in any form or by any means electroni...

Страница 3: ...600 15 LOCAL OPERATION OVERVIEW 17 Operating States 18 Power up and Reset 18 Static 18 Dynamic 18 Front Panel Display Navigation Link Emulation 19 Navigation in Static Mode 19 Navigation in Dynamic Mo...

Страница 4: ...enu Parameters 28 Set the L Band Input Frequency 28 Set the L Band Output Frequency Option 28 Static AWGN Operation Optional Feature 28 Setting the AWGN Menu Parameters 29 Set Noise Density Mode No 29...

Страница 5: ...1 Scroll Up Key 41 Dynamic Delay Attenuation Frequency Offset Phase Offset and AWGN Operation 41 Dynamic RF Operation 43 Dynamic Multipath Fading Operation 43 Dynamic Data Files 44 Dynamic File Names...

Страница 6: ...ctions Section 1 Introduction shows the ACE9600 equipment control and connector locations and describes external interfaces Section 2 Local Operation describes how to operate the ACE9600 from the fron...

Страница 7: ...Bold monospaced text indicates ACE9600 responses through remote mode Symbols The following symbols appear in the manual This symbol and its see also text is placed next to subject matter in the manua...

Страница 8: ...ct us if you want more information or have any questions or concerns about this or any other dBm product or manual Use any of the following methods Mail dBm 32A Spruce Street Oakland NJ 07436 Telephon...

Страница 9: ...Advanced Channel Emulator dBm Operations Manual ACE600 9...

Страница 10: ...tion introduces you to the Satellite Link Emulator instrument and describes the physical interface and turn on procedure Topics include ACE9600 functional overview Front and rear and interior views Ex...

Страница 11: ...tic mode of operation In Dynamic mode operation delay attenuation Doppler shift phase offset AWGN and multipath fading can be varied in real time to emulate changes in the relative position of communi...

Страница 12: ...control is done via a touch sensitive graphics panel Figure 1 1 Instrument Front Panel View Front view shows a four channel model Multiple channel models have two Type N f connectors for each channel...

Страница 13: ...t to 1 3VDC DC coupled Input level Logic 0 0 1V to 0 6V Logic 1 1 5V to 3 3V Trigger input BNC f connector termination impedance 130 ohms Thevenin equivalent to 1 3VDC DC coupled Input level Logic 0 0...

Страница 14: ...14 dBm Advanced Channel Emulator ACE9600 Operations Manual MLVDS A B Proprietary interface for high speed interchange of data between up to four ACE chassis USB Factory use only...

Страница 15: ...instrument is usable immediately However it is recommended to allow approximately 30 minutes warmup then press Preset for best performance Shutting Down the ACE9600 Move the front panel power to the...

Страница 16: ...16 dBm Advanced Channel Emulator ACE9600 Operations Manual...

Страница 17: ...from either the front panel or remotely via LAN The local front panel control is implemented via an 8 4 touch display graphic display On power up the state of the instrument is static mode The input s...

Страница 18: ...rnally stored parameter data files Upon receipt of a Start command the instrument sequentially executes the values in the parameter data files There are seven file types per channel and therefore up t...

Страница 19: ...on and conversely the Link Emulation key is used to access the hardware impairments and the link impairments respectively The Preset key resets the instrument to a known state Figure 2 1 Static Mode N...

Страница 20: ...tive display When touching a parameter the instrument responds with an audible beep and the background of the selected field is highlighted The user then enters the new numeric value via the keypad en...

Страница 21: ...delay value to select that delay field Type a value for delay Press ms us Enter The new value is entered Press Delay and enter a value for delay The characters appear as the new value is typed Press...

Страница 22: ...ynchronization under Dynamic Mode Control To s tore the ins trument s ettings Pressing Store activates the Store Settings display A storage register contains all Instrument State settings static param...

Страница 23: ...ime or Start Reset Pause status 1 Press the Recall key The utility display appears Press the number of the desired register to be loaded Recall can be invoked from Static or Dynamic modes 2 Press a nu...

Страница 24: ...he new values and return to the main menu Figure 2 7 LAN display To s et the ins trument to local or remote LAN control The Local Remote key toggles the instrument between local and remote During remo...

Страница 25: ...pe and each parameter step size can be unique for each channel Note that if the entered step size exceeds the realizable limit the value will be set to the valid limit The following step sizes may be...

Страница 26: ...ed press Clear to exit the step mode Note During operation if step forces a parameter out of range the value will be set to the allowable limit Static Delay Operation When the mode is set to static ea...

Страница 27: ...70 0 0 10 dB steps Press Enter units of dB to enter Set Phas e Offs et Press the phase field for the desired channel valid during Static mode only Press numeric value valid range 0 to 359 9 degrees 0...

Страница 28: ...uencies will track For this configuration modify the RF in value and the RF out value will change automatically Static AWGN Operation Optional Feature The optional AWGN feature adds white Gaussian noi...

Страница 29: ...GN at full scale the noise power is typically 16 dBm and the maximum applied signal power must be 10 1 dBc below full scale at the instrument input Setting the AWGN Menu Parameters Set Nois e Dens ity...

Страница 30: ...r has changed Set Ratio should be pressed again to re measure the input signal power If an out of range noise density is computed the noise density will be set to the nearest limit value and the value...

Страница 31: ...ess the CH key to cycle through all installed channels The current channel number is displayed at bottom left of the display Fading Disabled Fading Enabled Toggles between multipath fading active or b...

Страница 32: ...ng submenu is an extension of the fading main menu to provide the additional controls for Rician K factor Angle of Arrival path correlation and Log Normal controls Any path can be correlated to any ot...

Страница 33: ...re displayed at a time Use this key to view the remaining six paths Grid Parameters Type displays fading type Rayleigh Rician CW or Off The Type cannot be changed from this menu K factor 20 to 10 dB i...

Страница 34: ...rument will begin file execution upon receipt of a hardware trigger signal Paus ed The instrument is paused during a dynamic run The currently implemented parameter values are displayed Pressing the S...

Страница 35: ...ols the RF Frequency rate and the third controls the multipath update rate Each can be set on the respective display but there is a dependency between them See the Dynamic Timing Control section for a...

Страница 36: ...ternal trigger The Start key is disabled when the status on the front panel display shows Run or Done The Start key is also used to re start after Pause Pressing Start after Pause causes execution to...

Страница 37: ...e second update rate controls multipath fading It has a range of 100 msec to 1000 msec in a 100 200 500 1000 sequence and must always be equal to or slower than the delay update rate The third update...

Страница 38: ...dify the value Start Times must be a multiple of 1 second The dynamic run will begin at the data point corresponding to the start time offset For example if the update rate is 2 msec and the start off...

Страница 39: ...nnect the Master UART A port to Slave 1 UART A 3 Connect the Master UART B port to Slave 2 UART A 4 Connect the Master UART C port to Slave 3 UART A The UART cables must be male male 9 pin Sub D conne...

Страница 40: ...ed automatically when transitioning from Static mode to Dynamic mode They can also be invoked using the File Menu key while in Dynamic mode and the status is Ready File Menu 1 allows the user to selec...

Страница 41: ...ay Scroll Down Key Once the file menu is displayed and a parameter field is selected the Scroll Down key will cause the displayed file name to scroll downward through the list of file names that are v...

Страница 42: ...f the parameters Delay Attenuation Frequency Offset Phase Offset and AWGN are changed synchronously at the selected update rate When multiple parameters are being controlled by dynamic files data poin...

Страница 43: ...ned in File Menu 2 Dynamic Multipath Fading Operation When the ACE9600 hardware is configured with optional multipath fading a twelve tap fading model can be changed dynamically The Fade update rate m...

Страница 44: ...gn file RFFxxxxxxx designates an RF frequency file MPFxxxxxxx designates a multipath fading file Dynamic File Formats Data files are generated in readable ascii characters The first line in the data f...

Страница 45: ...nd multipath fading files Up to 7 alphanumeric characters including the underscore character _ can follow the first three letters in the file name Data File Des cription Delay Files The ACE9600 change...

Страница 46: ...sec 163 84us sec 16384ns sec 1638 4ns sec 1ms Min 100ns sec 10 0ns sec 1000ps sec 100ps sec 1ms Max 2000 0us sec 200 00us sec 20000ns sec 2000 0ns sec 1st data point in dat file ms 1234567 ms 1234567...

Страница 47: ...whether it was on or off in static mode Once enabled in dynamic mode awgn cannot be disabled without returning to static mode Dynamic awgn is driven by data files containing the value of absolute nois...

Страница 48: ...r of sample points in the file The second through thirteenth line in the file represents the path Type CorrPath CorrVal Rate StdDev and Kfactor settings which remain fixed during a dynamic run Each su...

Страница 49: ...s one of CW RAY RICE OFF Each subsequent data line contains the dynamic path parameter values The format for the path data is Doppler Hz Delay usec Loss dB AoA degrees Path data is delimited by a semi...

Страница 50: ...d with the LAN interface While in remote all front panel controls except the Local key are disabled ACEControl provides a graphical user interface to manipulate parameter files and to control and moni...

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