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GPIB OPERATION

3-2-39

SWEEP?

(continued)

:RFLV?

Prepares message containing information on RF Level Sweep
settings in the following format:

:SWEEP:START <nr2>;STOP <nr2>;STEP <nr1>;TIME <nr1>;
MKRNUM <nr1>;<status>;VALUE <nr2>

where: <status> is a program mnemonic indicating whether

the selected Marker is ON or OFF.

Sample response:

:SWEEP:START -107.0;STOP -27.0;STEP 80;TIME 50;

MKRNUM 2;MKRON;VALUE -97.0

:LFGF?

Prepares message containing information on LF Generator
Frequency Sweep settings in the following format:

:SWEEP:START <nr2>;STOP <nr2>;STEP <nr1>;TIME <nr1>;
MKRNUM <nr1>;<status>;VALUE <nr2>

where: <status> is a program mnemonic indicating whether

the selected Marker is ON or OFF.

Sample response:

:SWEEP:START 300.0;STOP 3000.0;STEP 2700;TIME 1;

MKRNUM 1;MKRON;VALUE 400.0

:LFGL?

Prepares message containing information on LF Generator
Level Sweep settings in the following format:

:SWEEP:LFGL:START <nr2>;STOP <nr2>;STEP <nr1>;TIME <nr1>;
MKRNUM <nr1>;<status>;VALUE <nr2>

where: <status> is a program mnemonic indicating whether

the selected Marker is ON or OFF.

Sample response:

:SWEEP

:LFGL

:START 1.0;STOP 120.0;STEP 120;TIME 10;

MKRNUM 2;MKRON;VALUE 5.0

:INTF?

Prepares message containing information on Modulation
Oscillator Frequency Sweep settings in the following format:

:SWEEP:INTF:START <nr2>;STOP <nr2>;STEP <nr1>;TIME <nr1>;
MKRNUM <nr1>;<status>;VALUE <nr2>

where: <status> is a program mnemonic indicating whether

the selected Marker is ON or OFF.

Sample response:

:SWEEP:INTF:START 270.0;STOP 3300.0;STEP 500;TIME 1;

MKRNUM 4;MKRON;VALUE 2900.0

:HOP?

Prepares message containing information on Frequency
Hopping Sweep in the following format:

:SWEEP:HOP:TIME<nr1>

Содержание 2030 Series

Страница 1: ...rating Manual Document part no 46892 293 Issue 8 17 May 2007 http www avionteq com IFR Aeroflex NAV 750C 2030 Series Avionics Option 6 aspx www avionteq com To buy sell rent or trade in this product p...

Страница 2: ...ocument may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying or recorded by any information storage or retrieval system without permission in wr...

Страница 3: ...ENERAL INFORMATION Chapter 2 INSTALLATION Chapter 3 1 OPERATION Chapter 3 2 GPIB OPERATION Chapter 4 1 BRIEF TECHNICAL DESCRIPTION Chapter 5 1 ACCEPTANCE TESTING App 5 1 A ACCEPTANCE TESTING SECOND MO...

Страница 4: ...r is protected by the following patents GB 2030391 US 4323943 FR 80 26256 GB 2064892 US 4400630 GB 2158999 US 4672336 GB 2217542 US 5061909 EP 0322139 GB 2214012 US 4870384 GB 1601822 US 4194164 EP 01...

Страница 5: ...table equipment and is for use in a pollution degree 2 environment The equipment is designed to operate from an installation category I and II supply Equipment should be protected from the ingress of...

Страница 6: ...ires of the supply lead If only one of these fuses should rupture certain parts of the equipment could remain at supply potential For Option 100 single fuse version only Fuses Note that the internal s...

Страница 7: ...ery or a Lithium battery contained within an IC is used in this equipment As Lithium is a toxic substance the battery should in no circumstances be crushed incinerated or disposed of in normal waste D...

Страница 8: ...t has been designed and manufactured by Aeroflex to generate low power RF signals for testing radio communications apparatus If the equipment is not used in a manner specified by Aeroflex the protecti...

Страница 9: ...bles et pour une utilisation dans un environnement de pollution de niveau 2 Cet quipement est con u pour fonctionner partir d une alimentation de cat gorie I et II Cet quipement doit tre prot g de l i...

Страница 10: ...les Notez qu il y a deux fusibles l un pour la phase et l autre pour le neutre du c ble d alimentation Si un seul fusible est coup certaines parties de l appareil peuvent rester au potentiel d aliment...

Страница 11: ...dans le traitement de d chets toxiques WARNING Lithium Une pile au Lithium ou un CI contenant une pile au Lithium est utilis dans cet quipement Le Lithium tant une substance toxique il ne faut en auc...

Страница 12: ...appareils de radio communications La protection de l quipement peut tre alt r e s il n est pas utilis dans les conditions sp cifi es par Aeroflex Aeroflex n a aucun contr le sur l usage de l instrume...

Страница 13: ...r Verwendung in einer Grad 2 verunreinigten Umgebung entwickelt und getestet Dieses Ger t ist f r Netzversorgung Klasse I und II zugelassen Das Ger t sollte vor dem Eindringen von Fl ssigkeiten sowie...

Страница 14: ...zu beachten da es Sicherungen in beiden spannunsf hrenden und neutralen Zuleitungen gibt Wenn nur eine von diesen Sicherungen schmilzt so bleiben einige Ger teteile immer noch auf Spannungspotential E...

Страница 15: ...G Lithium Eine Lithium Batterie oder eine Lithium Batterie innerhalb eines IC ist in diesem Ger t eingebaut Da Lithium ein giftiges Material ist sollte es als Sonderm ll entsorgt werden Diese Batterie...

Страница 16: ...est von Kommunikationseinrichtungen zu erzeugen Sollte das Ger t nicht auf die von Aeroflex vorgesehene Art und Weise verwendet werden kann die Schutzfunktion des Ger tes beeintr chtigt werden Aerofle...

Страница 17: ...trol and laboratory use per apparati di classe I trasportabili e per l uso in un ambiente inquinato di grado 2 L apparato stato progettato per essere alimentato da un alimentatore di categoria I e II...

Страница 18: ...are che entrambi i capi del cavo d alimentazione sono provvisti di fusibili In caso di rottura di uno solo dei due fusibili alcune parti dello strumento potrebbero restare sotto tensione Opzione singo...

Страница 19: ...to integrato contenente una batteria al litio Poich il litio una sostanza tossica la batteria non deve essere mai n rotta n incenerita n gettata tra i normali rifiuti Questo tipo di batteria non pu es...

Страница 20: ...da Aeroflex le protezioni previste sullo strumento potrebbero risultare inefficaci Aeroflex non pu avere il controllo sull uso di questo strumento e non pu essere ritenuta responsabile per eventi ris...

Страница 21: ...ando se traslada el equipo de entorno fr o a un entorno caliente es importante aguardar la estabilizaci n el equipo para evitar la condensaci n Solamente debe utilizarse el equipo bajo las condiciones...

Страница 22: ...usible corresponden a los requeridos por el equipo Ver secci n de especificaciones del cap tulo 1 del Manual de Operaci n para comprobar los requisitos de alimentaci n WARNING Aviso de toxicidad Algun...

Страница 23: ...r evaluar la carga el entorno de trabajo y la propia capacidad de acuerdo con la Directiva Europea 90 269 EEC y el Reglamento Nacional Asociado WARNING Tener en cuenta con el equipo inclinado Si utili...

Страница 24: ...ulation 1 3 Avionics modes 1 3 ILS mode 1 3 Marker beacon mode 1 3 VOR mode 1 4 ADF mode 1 4 SEL CAL mode 1 4 Incrementing 1 4 Sweep 1 4 Non volatile memory 1 4 Programming 1 4 Software protection 1 5...

Страница 25: ...l Within the display the soft key functions are indicated by labels which appear alongside the keys situated at either side of the display panel Display The display is a dot matrix liquid crystal pane...

Страница 26: ...uency range of 0 1 Hz to 500 kHz with a resolution of 0 1 Hz Two independent BNC inputs on the front panel allow external modulation signals to be mixed with the internal signal s Therefore a maximum...

Страница 27: ...or the GPIB If no step size is entered for a parameter the steps are preset to 1 kHz for carrier frequency 1 kHz for modulation oscillator and LF frequency 1 kHz for FM deviation 1 for AM depth and 1...

Страница 28: ...as a recommended two year calibration interval and is calibrated entirely by electronically controlled adjustment There are no internal mechanically adjustable components to affect the calibration The...

Страница 29: ...ary control Units may be V mV V EMF or PD dB relative to 1 V 1 mV EMF or PD dBm Conversion between dB and voltage units may be achieved by pressing the appropriate units key dB or V mV V Indication 4...

Страница 30: ...frequency of 1 kHz and a carrier frequency of 500 MHz M on AM Typically less than 0 1 radian at a carrier frequency of 500 MHz for 30 AM depth for modulation rates up to 10 kHz MODULATION MODES Four...

Страница 31: ...etition rate of 30 Hz in 0 1 Hz steps Tone frequencies maintain 3 1 and 5 1 relationships with the ILS rate Tone suppression Either tone can be suppressed Additional modulation Available for 0 DDM fro...

Страница 32: ...nternal or external modulation source AM depth accuracy 3 of setting 0 5 for carrier frequencies up to 400 MHz Frequency The VOR repetition frequency of 30 Hz may be varied in 0 1 Hz steps The sub car...

Страница 33: ...g facility Distortion Using external modulation without ALC Less than 3 at maximum deviation for modulation frequencies up to 20 kHz Less than 0 3 at 10 of maximum deviation for modulation frequencies...

Страница 34: ...nal LF generator or external via front panel sockets AMPLITUDE MODULATION For carrier frequencies up to 1 GHz and for output levels less than 13 dBm with Option 003 Range 0 to 99 9 Selection By keyboa...

Страница 35: ...dible signalling tones in accordance with EIA ZVEI DZVEI CCIR EURO1 EEA NATEL and DTMF standards Facilities are also available for creating and storing user defined tone systems Requires second modula...

Страница 36: ...meter Number of steps Time per step Step time 1 ms to 10 s per step Sweep ramp Synchronized analogue ramp with an amplitude of nominally 0 V to 10 V peak on rear panel BNC connector Markers 5 user sel...

Страница 37: ...003 for Class 1 portable equipment for use in a Pollution Degree 2 environment The instrument is designed to operate from an Installation Category 2 supply UL 1244 approved RATED RANGE OF USE Over whi...

Страница 38: ...o BNC female 59999 163 Precision coaxial adapter N male to SMA female 54411 051 Impedance adapter 50 to 75 BNC connectors 54311 095 RF connector cable 1 m type N connectors 43129 189 GPIB lead assembl...

Страница 39: ...GENERAL INFORMATION 1 16...

Страница 40: ...rator NAV 750C is in conformity with the following EC directive s including all applicable amendments Reference No Title 2006 95 EC Low Voltage Directive 2004 108 EC EMC Directive and that the standar...

Страница 41: ...URPOSE INTERFACE BUS GPIB 2 6 GPIB cable connection 2 6 GPIB connector contact assignments 2 7 IEEE to IEC conversion 2 7 Interface bus connection 2 8 RACK MOUNTING 2 8 ROUTINE MAINTENANCE 2 8 BATTERY...

Страница 42: ...e internal temperatures and reduce the instrument reliability so its performance may not meet specification Class I power cords 3 core General When the equipment has to be plugged into a Class II ungr...

Страница 43: ...ndard C 3b or side earth clips standard C 2b the latter is commonly called the German Schuko plug In common with other Schuko style plugs the plug is not polarized when fitted into a Schuko socket The...

Страница 44: ...orm Dieses Netzkabel sollte nicht in D nemark verwendet werden da hier keine Erdeverbindung hergestellt wird Espa ol El cable de alimentaci n tipo Europeo Continental dispone de una clavija C4 normali...

Страница 45: ...age If different replace with the same type and rating as marked adjacent to the supply connector fuse s integral to supply connector see Fuses section and Fig 2 1 for guidance 5 Switch on the instrum...

Страница 46: ...as follows 100 V to 120 V TT1 6AL250V 1 6 amp double time lag 220 V to 240 V TT1AL250V 1 amp double time lag Fuses are cartridge type measuring 20 mm x 5 mm Barrel Fuse Holders Hinged Cover Window COV...

Страница 47: ...8 REN Pair with 6 Pair with 7 Pair with 8 Pair with 9 Pair with 10 Pair with 11 Logic ground 12 1 24 13 Fig 2 2 GPIB connector contact assignments viewed from rear of instrument IEEE to IEC conversion...

Страница 48: ...assumes no liability for failure of customer to comply with any of the safety precautions outlined in this manual The following electrical tests and inspection information is provided for guidance pur...

Страница 49: ...ction and combined live and neutral supply connections with the equipment supply switch in the on position It is advisable to make the live neutral link on the appliance tester or its connector to avo...

Страница 50: ...for approximately 30 seconds whilst the replacement is made 2 Using a coin or suitable tool unscrew the battery compartment cover at the rear of the instrument 3 Remove the battery noting its orientat...

Страница 51: ...er glideslope frequency conversion 3 19 Tone suppression 3 19 Communication channel testing 3 20 Tone phase variability 3 21 Marker beacon mode 3 22 VOR mode 3 22 Sub carrier peak deviation 3 23 Ident...

Страница 52: ...ing 3 55 Display blanking 3 55 Power up options 3 55 RF level units 3 56 LF level units 3 57 RF level utility 3 58 LOW FREQUENCY OPERATION 3 62 LF monitor 3 62 Modulation source monitoring 3 62 Modula...

Страница 53: ...3 29 Fig 3 1 27 Internal source selection menu 3 32 Fig 3 1 28 LF phase control 3 33 Fig 3 1 29 External source selection menu 3 34 Fig 3 1 30 Continuous tone selection menu 3 36 Fig 3 1 31 Sequential...

Страница 54: ...OPERATION 3 1 4 Fig 3 1 56 Memory recall menu 3 64 Fig 3 1 57 Memory stepping menu 3 66 Fig 3 1 58 Memory store menu 3 67 Fig 3 1 59 Frequency hopping menu 3 69...

Страница 55: ...EL Parameters are selected by means of hard keys which have their function printed on them soft keys which do not have any notation a numerical key pad and a rotary control knob see Fig 3 1 1 The hard...

Страница 56: ...ne the units of set parameters and terminate the numerical entry 14 CONTROL KNOB When enabled adjusts the value of the selected parameter 15 10 When knob disabled increments a selected parameter When...

Страница 57: ...for standard frequencies at 1 5 or 10 MHz with a nominal 2 V pk pk level into 50 7 VOLTAGE SELECTOR Removable cover reveals barrel which can be rotated to select the required voltage range 8 FUSES AC...

Страница 58: ...r so the 12 soft keys assume those functions necessary to drive the instrument from that menu Secondary menus are displayed by pressing a soft key while in a primary menu Some sub menus are nested e g...

Страница 59: ...s recalled rather than using the default factory settings Before proceeding any further you should reset this selection see Power up options Switch off and on again Alternatively use the MEM key follo...

Страница 60: ...hanges to AM Depth and this label is now highlighted AM disappears from the left hand side 5 Using the numerical key pad enter 30 AM depth by pressing 3 0 and kHz V Observe that the AM depth display c...

Страница 61: ...ob 1 Press KNOB UP DN to enable the control knob 2 On the display brackets will appear above and below the selected parameter These brackets embrace the part of the value which the control knob can ch...

Страница 62: ...ON and OFF retaining the 50 output impedance OUTPUT LEVEL The output level is selected at the Sig Gen menu by pressing RF Level and entering the required value on the numerical key pad The value can...

Страница 63: ...ion oscillator has a frequency range of 0 1 Hz to 500 kHz with a resolution of 0 1 Hz MODULATION MODES Two independent inputs on the front panel EXT MOD 1 INPUT EXT MOD 2 INPUT allow external modulati...

Страница 64: ...o waveforms Dual composite This mode is similar to the composite mode of operation but with the two modulating channels being the sum of two sources e g FM1 FM2 and AM1 AM2 Modulation mode selection I...

Страница 65: ...e applicable will be shown For composite mode selection a menu similar to Fig 3 1 8 will be displayed Fig 3 1 8 Sig Gen menu with two modulation channels Composite mode Note Full information on the ra...

Страница 66: ...priate soft key will result in the instrument entering the required Avionics mode of operation pressing Other Modes returns the display to the Modulation Mode Selection menu Fig 3 1 9 Avionics mode se...

Страница 67: ...played on the Sig Gen menu in as a modulation index microamps or as the attenuation ratio between the 90 Hz and 150 Hz tones in dB according to the formula R dB 20 log10 DDM SDM DDM SDM A If the setti...

Страница 68: ...e Presets ON OFF key and Fig 3 1 12 is produced Fig 3 1 12 DDM selection menu with presets Five DDM preset values can be selected for either localizer or glideslope frequencies The DDM value can still...

Страница 69: ...quency will be reset to the nominal localizer glideslope frequency The default SDM is 40 for localizer and 80 for glideslope and pressing LOC GS Freq will automatically reset the SDM to the default va...

Страница 70: ...equency can be modified using the Source Freq key Selecting DDM will return the instrument to normal ILS mode Communication channel testing is normally only required on localizer frequencies and conse...

Страница 71: ...e used to adjust the phase relationship of the two tones Selecting the 90 150 Phase key produces the display shown in Fig 3 1 15 Fig 3 1 15 ILS variable phase sub menu Three phase relationships can be...

Страница 72: ...Modulation source can be changed using the Select Source key Pressing the Avionics Modes key returns the display to the Avionics Mode Selection Menu Fig 3 1 16 Marker beacon mode selection menu VOR m...

Страница 73: ...Press More again to return to the previous modulation index screen Fig 3 1 19 VOR mode operation with peak deviation selection screen 2 Normal VOR mode is returned by pressing the Index ON OFF KEY RF...

Страница 74: ...e used to vary the VOR repetition rate from its normal setting of 30 Hz To vary the 30 Hz tone AM depth or the VOR bearing select the REF key to produce the display shown in Fig 3 1 20 The 30 Hz tone...

Страница 75: ...lay shown in Fig 3 1 21 Fig 3 1 21 VOR made operation with Coupling enabled When coupling is enabled the 30 Hz AM depth is set to be equal to the 9960 Hz sub carrier AM depth setting as the sub carrie...

Страница 76: ...generate a VOR signal having equal sub carrier and 30 Hz tone depths with a 0 bearing The AM depth displayed is the depth of each tone and can be changed using the VOR key An additional AM signal AM2...

Страница 77: ...190 kHz and the modulation depth to 30 from a 1 kHz source This setting is used to simulate a long wave transmitter for direction finding purposes The instrument operation is very similar to non avion...

Страница 78: ...sent Modulation ENABLED is replaced by the message SENDING TONES and the normal modulation tone is suppressed The SEL CAL code can be modified by pressing the SEL CAL Code key to produce a display sim...

Страница 79: ...can also be selected from the Sequential CALling Tones Utility used for other CALling tone standards In this mode FM is also allowed Tone Sequence LOCAL Tone Gap Tone Duration Mode Control Send Tones...

Страница 80: ...stem such that the instrument reverts to a carrier frequency generator Selecting amplitude modulation 1 At the Sig Gen menu press AM the AM Depth box is now highlighted 2 Enter the required modulation...

Страница 81: ...anges the coupling from AC to DC and vice versa When the input is DC coupled small frequency offsets can be reduced by using the nulling facility Nulling can be effected by pressing DCFM Nulling The l...

Страница 82: ...e SIGNALING Pressing Mod Src Phase displays the LF Source Phase Control menu see Fig 3 1 28 The LF source phase angle can be varied from 180 to 180 The pictograms at the end of each line show a symbol...

Страница 83: ...by pressing Mod Src Phase and entering the required value Where two internal modulation frequencies are active the starting phase difference between the two signals can be set up and the phase angle...

Страница 84: ...olic arbitrary waveform when an external source is selected This symbol also appears on the main menu A horizontal bar is shown when a source is not selected or is not available When the input is DC c...

Страница 85: ...he top of the screen If the level is within the required range the arbitrary waveform symbol will appear alongside the modulation value Low intermodulation mode When carrying out intermodulation tests...

Страница 86: ...election Menu with the current standard highlighted To select from further lists of 16 tones press CTCSS2 or USER The Tone Standard Selection Menu changes to show the new list Editing a tone standard...

Страница 87: ...t Utilities Selection Menu 1 calls up the Sequential CALling Tones Utility menu see Fig 3 1 31 Fig 3 1 31 Sequential CALling tones utility menu Tone Sequence Pressing this key causes hexadecimal data...

Страница 88: ...tones are triggered and restored after the tones have been sent Modulation on other channels is not affected by the CALling tones and this allows sequential signaling tones to be combined with sub au...

Страница 89: ...affected by the CALling tones and this allows sequential signaling tones to be combined with sub audible tones NO mod This option effectively inhibits sequential tones The tone sequence can be sent be...

Страница 90: ...normal Sequential Tones Utility menu The currently selected tone standard may be copied into the TEMP working space using the top left soft key shown CCIR to TEMP in Fig 3 1 35 and often this is a co...

Страница 91: ...are made directly on the CALling Tones Utility Menu Fig 3 1 35 Edit sequential tones standard menu Tone Number Tone Freq Default Duration Tone Gap Next Tone Previous Tone LOCAL CCIR to TEMP Store to U...

Страница 92: ...keyed in value Fig 3 1 36 Total shift menu Setting increment values 1 From the total shift menu select Set Steps The screen shows the currently set step sizes 2 Select Carrier Step enter the value on...

Страница 93: ...a key press an external pulse or GPIB control Once started the sweep can be stopped at any time when the display will indicate the current parameter value The sweep can be used with oscilloscopes X Y...

Страница 94: ...tered before putting the instrument in the sweep mode 3 Select the required sweep type by pressing the appropriate soft key e g Carrier Sweep The Sweep Type screen changes to confirm the selection 4 P...

Страница 95: ...try Start value 1 Select the appropriate soft key to enter the start value e g Start Freq 2 Enter the required start value via the numerical key pad and the appropriate terminator key Stop value 1 Sel...

Страница 96: ...d the MHz mV ms terminator key Markers A facility exists for producing markers controlled by the Sweep Markers Menu see Fig 3 1 40 Marker 1 Marker 2 Marker 3 Marker 4 Marker 5 LOCAL Marker ON OFF Enab...

Страница 97: ...Fig 3 1 41 Sweep in progress Note When the sweep is in progress all the hard keys are disabled and Stop Sweep and Abort Sweep soft keys are active Stopping the sweep Press Stop Sweep The sweep stops a...

Страница 98: ...d thus giving the user an indirect indication that no signal is being output from the instrument LOCAL Stop Sweep Reset Sweep Transfer Level Start Level Stop Sweep Status PAUSED AT 6 4 dBm Sweep Mode...

Страница 99: ...t again returns to the primary menu This provides an operating short cut in that it allows a sub menu to be re accessed without first having to go again through the primary menu This scheme does not a...

Страница 100: ...ates the backlighting whenever it is switched on Fig 3 1 45 Display adjust menu Hardware information To obtain a description of the instrument hardware press Hardware Status and the following informat...

Страница 101: ...ess Mod n Mode to display the Modulation Mode Selection Menu choose the type of modulation required by pressing Single Dual Comp or Dual Comp see Modulation mode selection above Setting the GPIB addre...

Страница 102: ...non volatile memory to ensure that the settings are recalled when power to the instrument is restored Selection menu 2 Press Utils Menu 2 from Utilities Selection Menu 1 The display now changes to sh...

Страница 103: ...ded for use as a diagnostic aid by allowing data to be sent to latches within the instrument For further information consult the Service Manual Elapsed time The elapsed time facility displays the numb...

Страница 104: ...1 is unlocked by entering the 4 digits on the key pad and pressing enter The menu will change and two soft keys Lock level 1 and Lock Keyboard will appear on the left hand side The default password is...

Страница 105: ...rns to the main menu which indicates the locked status by displaying a key shaped icon in the top left hand corner of the display The keyboard can be re enabled by entering the 4 digit password for Le...

Страница 106: ...n Fig 3 1 48 To change the default RF level units shown at switch on first unlock the instrument to Level 1 This causes an additional soft key to be displayed in the top left box see Fig 3 1 48 Select...

Страница 107: ...ection Menu shown in Fig 3 1 49 To change the default LF level units shown at switch on first unlock the instrument to Level 1 This causes an additional soft key to be displayed in the top left box se...

Страница 108: ...and a keyboard entry of the RF level is made the signal generator sets the level in the normal way However when the rotary control is enabled and used to adjust the RF level the normal attenuator cha...

Страница 109: ...and accuracy will be affected With no AM selected the effect on RF accuracy in the HYST region will be relatively minor But the effect in the HYST region on RF level accuracy will be more significant...

Страница 110: ...set by up to 2 dB This is done by selecting Offset Value and either keying in the value or making the adjustment with the control knob A separate offset can be set for the carrier frequency range 10 k...

Страница 111: ...RF Level Limit and entering the value required Units may be V mV or dB The choice of volts EMF volts PD and the dB reference is made by using the RF Level Units utility see RF level units above The RF...

Страница 112: ...F OUTPUT socket at a fixed level of 1 V Modulation drive monitoring Modulation drive monitoring is intended for the user to monitor complex modulating signals from both internal and external sources T...

Страница 113: ...d entering the value via the numerical key pad and pressing enter To set step values press LF Step for the LF Step Menu Freq Step or Level Step can be selected and the values entered as before To disp...

Страница 114: ...plus one increment and the LF Generator Monitor setting Inhibit ON OFF provides the option not to recall the carrier frequency setting The state of the option is indicated on the display There are 50...

Страница 115: ...on last specified on the numerical key pad Stores can be incremented or decremented externally by means of the SWEEP TRIGGER socket see External trigger above Note The settings for the sequential CALl...

Страница 116: ...enting and decrementing can also be done externally by means of the SWEEP TRIGGER socket see External trigger above Pressing Memory Return at any time returns to the start location When a limit is rea...

Страница 117: ...orage of a complete instrument setting i e carrier frequency RF level modulations and their increments ON OFF and source information Also stored are all 6 modulation oscillator frequencies plus one in...

Страница 118: ...ding on which mode is selected Carrier store The carrier frequency store has 100 locations numbered 0 to 99 for the storage of carrier frequency only This store can be used in conjunction with the ful...

Страница 119: ...the screen as shown in Fig 3 1 59 to appear on the signal generator Fig 3 1 59 Frequency hopping menu To load in a sequence the following command is used HOPSEQ n0 n1 n2 n3 n4 where n0 n are numeric...

Страница 120: ...aused SWEEP CONT continue hopping sequence SWEEP RESET reset sequence to start value When paused the carrier store number is displayed on the screen Note There are no markers available and the operati...

Страница 121: ...gle sweep internal trigger continuous sweep internal trigger or external sweep external trigger by using the following commands SWEEP MODE SNGL SWEEP MODE CONT SWEEP MODE EXT For externally triggered...

Страница 122: ...are displayed at the top of the screen and may also generate a Service Request if the relevant status registers are set Error display Front panel Errors are displayed as a single line of text at the t...

Страница 123: ...AM 13 18 exe FM limited by Carrier 14 19 exe WBFM limited by Carrier 15 20 exe AM2 limited by AM1 21 exe FM2 limited by FM1 26 dde Real Time Clock Problem 22 exe PM2 limited by PM1 27 dde Calibration...

Страница 124: ...l Step Too Big 60 exe Carrier Step Too Big 65 exe AM Step Too Big 66 exe FM Step Too Big 71 exe Sweep Stop Out of Range 67 exe PM Step Too Big 72 exe Sweep Steps Out of Range 68 exe Invalid Latch Numb...

Страница 125: ...ta Too Long 124 exe Illegal Standard 129 exe Voltage Type Error 125 exe Illegal Save Destination 130 exe Sweep Not Possible 131 exe Unknown Cal Point 136 exe Unknown Freq Standard 132 exe Unknown RF B...

Страница 126: ...E 3 2 21 MODULATION CONTROL 3 2 22 FREQUENCY MODULATION 3 2 23 PHASE MODULATION 3 2 24 AMPLITUDE MODULATION 3 2 25 WIDEBAND FM 3 2 26 PULSE MODULATION 3 2 27 MODULATION FREQUENCY 3 2 28 CTCSS TONES ED...

Страница 127: ...s device functions to be controlled and operating parameters to be set In the talk mode device status information and parameter settings can be read from the instrument For full information on the IEE...

Страница 128: ...DECIMAL NUMERIC PROGRAM DATA CHARACTER PROGRAM DATA SUFFIX PROGRAM DATA STRING PROGRAM DATA ARBITRARY BLOCK PROGRAM DATA DEVICE TALKING ELEMENTS The following is a list of the device talking elements...

Страница 129: ...l be read by the controller Common commands and queries defined in IEEE 488 2 begin with a Upper and lower case characters are considered equivalent i e FM fm Fm fM are all interpreted by the NAV 750C...

Страница 130: ...age terminated by EOM Also it should not start to send a new message until it has read the entire response terminated by EOM The query message may contain more than one query message unit but only one...

Страница 131: ...Response Message Terminator EOM either IDN or OPT must be the last Query Message Unit in a Program Message RST Reset Command Sets the instrument functions to the factory default power up state The de...

Страница 132: ...Standard Event Enable Register ESE Standard Event Status Enable Query Returns the value of the Standard Event Status Enable Register as nr1 CLS Clear Status Command Clears all the Status Event regist...

Страница 133: ...of each is usually given In the list which follows the abbreviations char nrf and str have the following meanings char Character Program Data nrf Decimal Numeric Program Data str String Program Data...

Страница 134: ...Mod source LF generator Frequency 1 kHz sine step 1 kHz Level 100 V Step 1 dB Status ON Sweep Type RF level Mode Single internal RF level sweep Start 144 dBm Stop 10 dBm Steps 100 Time 50 ms Markers 2...

Страница 135: ...one of GHZ MHZ KHZ or HZ Default suffix HZ UP Go UP one step DN Go DOWN one step RET Return to original setting XFER Transfer current value to be the new setting Data type None Allowed suffices None D...

Страница 136: ...Go UP one step DN Go DOWN one step RETN Return to original setting XFER Transfer current value to be the new setting ON Turn RF output ON OFF Turn RF output OFF Data type None Allowed suffices None D...

Страница 137: ...2 INC nr2 status where unit is character program data defining the default RF level units DBM DBV DBMV DBUV V MV or UV type is character program data indicating EMF or PD and status is a program mnemo...

Страница 138: ...TS command see above ENABLE Enable RF output level limit DISABLE Disable RF output level limit SAVE Save RF output level limit to memory Data type None Allowed suffices None Default suffix None RFLV L...

Страница 139: ...elect ILS mode with DDM MODE SDM AM2 select ILS mode with AM2 MODE SDM select ILS variable phase mode VALID MODE COMBINATION TABLE ILS VOR SDM DDM VOR BEAR SDM AM2 VOR AM2 SDM Note Order is not import...

Страница 140: ...OS or SIN_COS Allowed suffices None Default suffix None Example SDM PHASE SIN_COS SDM Prepares messages containing information on SDM in the following format SDM DEPTH nr2 INC nr2 Example SDM DEPTH 40...

Страница 141: ...RESS not used alone TONE90 TONE150 NONE Suppress the 90 Hz tone Suppress the 150 Hz tone Remove tone suppression Data type None Allowed suffices None Default suffix None Examples SUPPRESS TONE150 SUPP...

Страница 142: ...by using the appropriate standard commands Example for setting up and sending 400 Hz outer marker beacon Example CFRQ 75 MHZ RFLV VALUE 0 DBM ON AM1 DEPTH 95 PCT INTF1 ON INTF1 400 HZ MOD ON MODE AM...

Страница 143: ...haracter Program Data any one of Hz_240 Hz_300 Hz_360 Hz_420 Hz_450 Hz_480 Hz_510 or Hz_540 Allowed suffices None Default suffix None Example VOR DEVN HZ_450 VOR or SUB Prepares messages containing in...

Страница 144: ...lowed suffices None Default suffix None Examples BEARTO VALUE 90DEG INC 0 1 UP UP UP BEARFR VALUE 270DEG INC 0 1 DN DN DN BEAR Prepares messages containing information on VOR BEARING in the following...

Страница 145: ...Z RFLV VALUE 10 DBM ON AM1 DEPTH 30 PCT INTF1 ON INTF1 1 KHZ MOD ON MODE AM Sel cal mode SEL CAL adds the following to the Sequential Calling Tones SEL CAL is an additional valid type The data string...

Страница 146: ...AM1 AM2 PM1 PM2 PM1 PM1 PM2 AM1 WBFM AM1 AM2 WBFM WBFM PULSE FM1 PULSE FM1 FM2 PULSE PULSE PM1 PULSE PM1 PM2 PULSE WBFM Note At any time the 1 may be omitted for example FM is equivalent to FM1 Order...

Страница 147: ...n globally ON OFF Turn modulation globally OFF Examples MOD ON MOD OFF MOD Prepares message containing information on Modulation Control in the following format MOD status where status is a program mn...

Страница 148: ...Return to original setting XFER Transfer current value to be the new setting DCFMNL Perform DC FM WBFM null operation Data type None Allowed suffices None Default suffix None Examples FM DEVN 25KHZ I...

Страница 149: ...N one step RETN Return to original setting XFER Transfer current value to be the new setting Data type None Allowed suffices None Default suffix None Examples PM DEVN 2 5RAD INTF4 ON PM1 DEVN 1 5RAD I...

Страница 150: ...N Return to original setting XFER Transfer current value to be the new setting Data type None Allowed suffices None Default suffix None Examples AM DEPTH 30PCT INTF4 ON AM1 DEPTH 40PCT EXT1DC ON AM or...

Страница 151: ...ne Allowed suffices None Default suffix None DCFMNL Perform DC FM WBFM null operation Examples WBFM DEVN 10MHZ ON AC WBFM DEVN 13MHZ ON DC DCFMNL WBFM Prepares message containing information on Wideba...

Страница 152: ...LSE ON PULSE OFF PULSE CAL DISABLE PULSE Prepares message containing information on Pulse Modulation setting in the following format PULSE status where status is a program mnemonic indicating whether...

Страница 153: ...uffices DEG Default suffix DEG CTC1 Select tone number 0 to 15 from Continuous Tone Group 1 CTC2 Select tone number 0 to 15 from Continuous Tone Group 2 USER Select tone number 0 to 15 from Continuous...

Страница 154: ...suffix HZ LOAD Copy Standard to TEMP for editing Data type Character Program Data any one of CTC1 CTC2 or USER Allowed suffices None Default suffix None SAVE Save TEMP to USER after editing for non vo...

Страница 155: ...a type Decimal Numeric Program Data Allowed suffices None Default suffix None STOP Stop sending sequence Data type None Allowed suffices None Default suffix None MODE not used alone STD Select Tones s...

Страница 156: ...y TNUM Data type Decimal Numeric Program Data Allowed suffices Any one of GHZ MHZ KHZ or HZ Default suffix HZ TDUR Set Normal Tone Duration TGAP Set Inter element Gap Data type Decimal Numeric Program...

Страница 157: ...ndard is a program mnemonic defining the tone standard and modchannel is character program data defining the modulation channel allocated to tone signalling Example SEQT MODE STD ZVEI MOD TOTAL_FM SEQ...

Страница 158: ...represents Angular Modulation the suffix S indicates Source and D indicates Drive Allowed suffices None Default suffix None Examples LF MON FM ON LF MON ANGD LF GEN LF Prepares message containing inf...

Страница 159: ...ault suffix HZ UP Go UP one step DN Go DOWN one step RETN Return to original setting XFER Transfer current value to be the new setting SIN Select sinusoidal waveform TRI Select triangle wave Data type...

Страница 160: ...ting XFER Transfer current value to be the new setting Data type None Allowed suffices None Default suffix None UNITS Select default LF level units Data type Character Program Data DBM DBV DBMV V MV o...

Страница 161: ...ency PART Recall Partial 0 49 PXCF Recall Partial 0 49 without carrier frequency CFRQ Recall Carrier Freq 0 99 SEQT Recall Sequential Tones Sequence 0 19 SWEEP Recall Sweep 0 19 Data type Decimal Nume...

Страница 162: ...try where cmd is replaced by one of the commands START STOP STEP TIME MKRNUM MKRON MKROFF or VALUE LFGF not used alone cmd Select LF Generator Frequency sweep parameter entry where cmd is replaced by...

Страница 163: ...s used for the parameter SWEEP Prepares message containing information on Sweep Mode Type and Marker status in the following format SWEEP MODE mode TYPE type status where mode is a program mnemonic re...

Страница 164: ...TEP 2700 TIME 1 MKRNUM 1 MKRON VALUE 400 0 LFGL Prepares message containing information on LF Generator Level Sweep settings in the following format SWEEP LFGL START nr2 STOP nr2 STEP nr1 TIME nr1 MKR...

Страница 165: ...E CONT TYPE INTF4 SWEEP Prepares message containing information on Sweep Mode Type and Marker status in the following format SWEEP MODE mode TYPE type status where mode is a program mnemonic represent...

Страница 166: ...pping sequence Data type Decimal Numeric Program data can be multiple Allowed suffices None Default suffix None Examples HOPSEQ 56 72 0 4 99 72 HOPSEQ 255 0 4 17 23 64 72 HOPSEQ Returns a value 0 1024...

Страница 167: ...FSTD Prepares message containing information on frequency standard selection in the format FSTD char Example FSTD EXT10 BLANK Blank or unblank various parts of the display The number sent after the co...

Страница 168: ...ample 1990 04 01 OPER Prepares message containing information on total operating hours in the following format nr2 Example 1453 0 ELAPSED Prepares message containing information on elapsed operating h...

Страница 169: ...ogram Data any one of SEQT FLSWP SSSWP MEMUP MEMDN or VOID Allowed suffices None Default suffix None Examples DEVTRG SEQT EXTTRG MEMUP KLOCK Disables keyboard entry except RPP Reset and Go to Local Da...

Страница 170: ...ter may be set by SRE or read by SRE If the bitwise AND of the Status Byte and the Enable Register is non zero the Flag Master Summary Status mss is True Bit 6 of the Status byte value read by STB hol...

Страница 171: ...Register cannot be written to The Transition Filter determines which transition of the Condition Register data bits will set the corresponding bit in the Event Register Either positive going negative...

Страница 172: ...e CLS common command Once cleared an Event Register bit will only be set again if the appropriate change in the Condition bit occurs The Event Enable Register may be both written to and read from It i...

Страница 173: ...st control not implemented in this product opc operation complete set in response to the OPC command for synchronisation esb standard event register summary bit ESR ESE ESE Register Read Write Command...

Страница 174: ...l mod 1 alc loop signal too low d12 not used d5 external mod 1 alc loop signal too high d13 not used d6 external mod 2 alc loop signal too low d14 rf level uncalibrated d7 external mod 2 alc loop sign...

Страница 175: ...restricted by requested am1 depth d4 fm2 deviation restricted by requested fm1 deviation d5 pm2 deviation restricted by requested pm1 deviation d6 number of sweep steps restricted by other parameters...

Страница 176: ...selfcal completed d3 dc fm null in progress dc fm null completed d4 not used not used d5 not used not used d6 not used not used d7 not used not used ssb instrument event register summary bit SCR SSR S...

Страница 177: ...ce a nr1 response message in the Output Queue representing the Error at the head of the queue if the queue is empty then this message will be 0 C0075 d d d d d d d d 3 7 5 1 2 6 4 0 Status Byte Regist...

Страница 178: ...he standard event register summary bit mav is message available indicating that the output queue is non empty hsb is hardware status summary bit csb is coupling status summary bit ssb is instrument st...

Страница 179: ...us summary bit csb is coupling status summary bit ssb is instrument status summary bit rqs esb and mav are defined in IEEE 488 2 rqs request for service will produce an SRQ at the controller It is set...

Страница 180: ...ondition Register CSE nrf Writes to Coupling Status Enable Register CSE Reads from Coupling Status Enable Register CSR Reads from Coupling Status Register HCR Reads from Hardware Condition Register HS...

Страница 181: ...ing a fractional N synthesizer system Additional frequency coverage is achieved by means of frequency division or multiplication Low frequencies are generated by a beat frequency oscillator BFO system...

Страница 182: ...BRIEF TECHNICAL DESCRIPTION 4 1 2 Fig 4 1 1 Block schematic diagram...

Страница 183: ...ale shape 5 1 19 EXTERNAL FM 5 1 20 CARRIER FREQUENCY OFFSET 5 1 22 INTERNAL PHASE MODULATION 5 1 23 Internal phase modulation flatness 5 1 23 SPECTRAL PURITY 5 1 25 Residual FM 5 1 25 Carrier harmoni...

Страница 184: ...est set up 5 1 10 Fig 5 1 6 Level accuracy test set up 5 1 11 Fig 5 1 7 External modulation test set up 5 1 13 Fig 5 1 8 Modulation ALC distortion test set up 5 1 14 Fig 5 1 9 Internal AM depth and di...

Страница 185: ...er 0 1 dB from 10 kHz to 1 35 GHz Aeroflex 6960A and 6912 sensor Measuring receiver 0 dBm to 127 dBm 2 5 to 1300 MHz HP8902A and 11722A sensor and 11793A down converter Signal generator 8 dBm from 32...

Страница 186: ...1 dB from 30 kHz to 2 7 GHz Aeroflex 6960A and 6910 or 6912 sensor Measuring receiver 0 dBm to 127 dBm 2 5 MHz to 1300 MHz HP 8902A and 11722A sensor and 11793A down converter Signal generator 8 dBm...

Страница 187: ...Connect the test equipment as shown in Fig 5 1 1 2 Set the UUT to RF Level 0 dBm Carrier Freq 2 5 MHz 3 Increment the RF output of the UUT in 1 dB steps up to 12 dBm and in 0 1 dBm steps up to 13 dBm...

Страница 188: ...UT to RF Level 6 1 dBm and measure the RF level 5 Decrement the output of the UUT in 6 dB steps down to an RF level of 120 1 dBm measuring the RF level at each step Check that the measured level is wi...

Страница 189: ...pad individually as follows UTIL Utils Menu 2 Latch Data 95 enter Decimal Binary The binary latch data will now appear in the bottom right hand side of the display 5 By using the Toggle Bit and the Cu...

Страница 190: ...to Table 5 1 4 check that the carrier frequencies can be selected correctly and are within specification It will be necessary to disconnect the 50 ohm load and reconnect the UUT RF OUTPUT to the B in...

Страница 191: ...apable of measuring down to 0 03 THD from 100 Hz to 20 kHz Rohde Schwarz UPA 3 TEST PROCEDURES Modulation oscillator frequencies Fig 5 1 4 Modulation oscillator frequencies test set up 1 Connect the t...

Страница 192: ...quipment as shown in Fig 5 1 5 2 Set the UUT to Source Freq F4 100 Hz 3 Check that the distortion measured on the audio analyzer at the frequencies indicated in Table 5 1 6 is less than 0 1 TABLE 5 1...

Страница 193: ...est set up 1 Connect the test equipment as shown in Fig 5 1 6 2 Set the UUT to give an LF output of 5 V at 1 kHz as follows LF LF Gen LF Freq 1 kHz LF Level 5 V 3 The level measured on the digital mul...

Страница 194: ...B relative function 4 Set the modulation oscillator to the frequencies given in Table 5 1 8 measuring the difference from the reference in 3 above which should be less than 1 dB TABLE 5 1 8 FREQUENCY...

Страница 195: ...on flatness Fig 5 1 7 External modulation test set up Mod input 1 1 Connect the test equipment as shown in Fig 5 1 7 2 Set the function generator to 1 V RMS sine wave output at a frequency of 1 kHz 3...

Страница 196: ...1 kHz ref 100 kHz 300 kHz Modulation ALC distortion C0222 INPUT UUT Audio Analyzer LF OUTPUT EXT MOD 1 INPUT OUTPUT Fig 5 1 8 Modulation ALC distortion test set up 1 Connect the test equipment as sho...

Страница 197: ...5 Accuracy Better than 1 1 distortion option TEST PROCEDURES Fig 5 1 9 Internal AM depth and distortion test set up 1 Connect the test equipment as shown in Fig 5 1 9 2 Set the UUT to RF Level 0 dBm C...

Страница 198: ...5 1 11 Check that the measured depths are within specification TABLE 5 1 11 AM DEPTHS AM depth 1 10 31 34 37 39 1 39 4 39 7 40 70 2 20 32 35 38 39 2 39 5 39 8 50 80 5 30 33 36 39 39 3 39 6 39 9 60 85...

Страница 199: ...up 1 Connect the test equipment as shown in Fig 5 1 10 2 Set the UUT to RF Level 7 dBm Carrier Freq 400 MHz AM 80 Then select EXT MOD 1 INPUT DC coupled as follows Select Source Select External Ext1 D...

Страница 200: ...e the FM deviation on the modulation meter 3 Set up a carrier frequency step on the UUT of 1 MHz as follows Set Steps Carrier Step 1 MHz SIG GEN 4 Set up an FM deviation of 500 kHz and increment the c...

Страница 201: ...the UUT to Carrier Freq 31 64 MHz RF Level 0 dBm FM Devn 224 kHz 2 Referring to Table 5 1 14 measure the FM on the modulation meter at the deviations indicated TABLE 5 1 14 FM SCALE SHAPE DEVIATIONS D...

Страница 202: ...the UUT to Carrier Freq 35 468 750 1 Hz RF Level 0 dBm FM Devn 40 kHz UTIL Mod n Mode Comp SIG GEN Select Source Select External Ext1 AC Coupling SIG GEN FM2 Select Source Ext2 AC Coupling SIG GEN 40...

Страница 203: ...ord the frequency indicated on the counter F2 11 Calculate the FM deviation using the following formula F1 F2 2 Measured dev FM1 12 It will now be necessary to reconnect the test equipment as shown in...

Страница 204: ...ing SIG GEN 4 Measure and record the carrier frequency on the counter 5 Set the UUT to DC coupled EXT MOD 1 INPUT as follows Select Source Ext1 DC Coupling DCFM Nulling SIG GEN 6 Measure the change in...

Страница 205: ...se modulation flatness 1 Connect the test equipment as shown in Fig 5 1 9 2 Set the UUT to Carrier Freq 21 093 750 1 Hz RF Level 0 dBm M 10 rad Select Source F4 1 kHz 3 Set the modulation meter to mea...

Страница 206: ...Figure recorded in 6 Figure recorded in 4 The change in response should be less than 1 dB with respect to 1 kHz 8 Reset the modulation frequency on the UUT to 1 kHz 9 Using the modulation meter set t...

Страница 207: ...0 3 to 3 4 kHz unweighted bandwidth at a 470 MHz carrier TEST EQUIPMENT Description Minimum specification Example Modulation meter Capable of measuring Residual FM less than 7 Hz Aeroflex 2305 Measuri...

Страница 208: ...Set the UUT to the frequencies indicated in Table 5 1 17 and repeat 3 above TABLE 5 1 17 CARRIER HARMONIC FREQUENCIES Carrier frequencies Hz 10 000 0 42 187 500 1 100 000 0 84 375 000 3 10 000 000 0...

Страница 209: ...frequency TEST EQUIPMENT Description Minimum specification Example Phase noise measuring device Capable of measuring phase noise of 116 dBc Aeroflex L262 Signal generator SSB phase noise at least 116...

Страница 210: ...cilloscope 100 MHz bandwidth Tektronix 2235 Aeroflex uses a method of Direct Digital Synthesis DDS to generate the ILS waveforms One DDS generated waveform contains both the 90 Hz tone and the 150 Hz...

Страница 211: ...re shown in Figs 5 1 16 and 5 1 17 These traces are for the 90 Hz and the 150 Hz tones having equal amplitudes i e 0 DDM Fig 5 1 16 Oscilloscope trace for a 0 DDM waveform 4 On the UUT reduce the SDM...

Страница 212: ...d should increase and the 150 Hz sideband should decrease For a signal with a DDM of 40 the 150 Hz sideband will be suppressed as shown in Figs 5 1 18 the trace is 2 ms div and 5 1 19 Fig 5 1 18 Oscil...

Страница 213: ...pe trace for a 150 Hz dominant waveform 6 On the UUT select the 150 Hz tone to be dominant The 90 Hz sideband should be suppressed and the 150 Hz sideband should be present as shown in Figs 5 1 20 the...

Страница 214: ...cy is equal to the accuracy of the ILS waveform generated by the instrument TEST EQUIPMENT Description Minimum specification Recommended Modulation meter 50 kHz to 1 GHz Aeroflex 2305 AM accuracy 0 5...

Страница 215: ...r the AM ILS signal without admitting an excessive amount of noise In the left hand window a 1 selects the filter and a 0 deselects it 3 With AM channels 1 and 2 turned off allow the modulation meter...

Страница 216: ...nt as follows Unit under test ILS mode Carrier freq 108 1 MHz LF output Monitor AM drive SDM 40 DDM 0 Dominant tone 90 Hz Spectrum analyzer Span div 20 Hz Frequency 0 to 200 Hz Ref level 20 dBm Resolu...

Страница 217: ...ACCEPTANCE TESTING 5 1 35 Fig 5 1 23 Equipment configuration for DDM waveform accuracy...

Страница 218: ...tion meter Freq tune 108 MHz Function AM Second function 28 On 3 With SUB and REF set to 0 measure the residual AM noise Note the reading Residual AM noise depth ____________ 4 On the UUT select a SUB...

Страница 219: ...23 2 Set up the test equipment as follows Unit under test VOR mode SUB depth 30 REF depth 30 Spectrum analyzer Span div 200 Hz Ref freq 9 96 kHz Ref level 10 dBm Bandwidth 30 Hz 3 Check that a displa...

Страница 220: ...s follows Unit under test UTIL Mod n Mode Composite SIG GEN LF output Modulation monitor Modulation drive AM1 30 ON AM2 30 ON INT F1 30 Hz INT F2 30 Hz Set AM1 source to INT F1 Set AM2 source to INT F...

Страница 221: ...te of the next calibration check can be entered from the calibration utilities menu by pressing the Set Next Cal Date key On reaching the calibration date the instrument will display an error message...

Страница 222: ...Modulation oscillator frequencies 5 1 A 3 Table 5 1 A 2 Distortion frequencies 5 1 A 3 Table 5 1 A 3 LF output levels 5 1 A 4 Table 5 1 A 4 Test frequencies 5 1 A 5 Table 5 1 A 5 AM depths 5 1 A 6 Ta...

Страница 223: ...0 Hz to 500 kHz Aeroflex 2440 Audio analyzer Capable of measuring down to 0 03 THD from 100 Hz to 20 kHz Rhode Schwarz UPA 3 TEST PROCEDURES Modulation oscillator frequencies C0218 LF OUTPUT UUT 2440...

Страница 224: ...500 000 00 Modulation oscillator distortion C0219 LF OUTPUT UUT Audio Analyzer INPUT Fig 5 1 A 2 Modulation oscillator distortion test set up 1 Connect the test equipment as shown in Fig 5 1 A 2 2 Se...

Страница 225: ...imeter INPUT Fig 5 1 A 3 Level accuracy test set up 1 Connect the test equipment as shown in Fig 5 1 A 3 2 Set the UUT to give an LF output of 5 V at 1 kHz by entering the following LF LF Gen LF Freq...

Страница 226: ...acy above 3 Reference this level on the audio analyzer using the dB relative function 4 Set the modulation oscillator to the frequencies given in Table 5 1 A 4 measuring the difference from the refere...

Страница 227: ...shape test set up 1 Connect the test equipment as shown in Fig 5 1 A 5 2 Set the UUT to RF level 0 dBm Carrier freq 100 MHz then enter the following UTIL Mod n mode Comp SIG GEN AM 1 3 Measure the AM...

Страница 228: ...nt connected as in Fig 5 1 A 5 set the UUT to Carrier freq 31 64 MHz RF level 0 dBm then enter the following UTIL Mod n Mode Comp SIG GEN FM2 Select Source Select Internal Internal F4 SIG GEN FM1 2 Th...

Страница 229: ...esis 3 59 External AM 5 17 External FM 5 20 External modulation 5 13 External source selection 3 34 External trigger 3 51 F Factory default settings 3 65 3 8 Fire hazards v First time use 3 9 Frequenc...

Страница 230: ...VOR 3 18 VOR 3 18 VORF 3 19 VORF 3 20 WAI 3 6 WBFM 3 26 WBFM 3 26 GPIB operation 3 1 H Hardware information 3 50 Hazard symbols iv I IEEE 488 2 3 2 IEEE to IEC conversion 2 7 Incrementing 3 42 Interfa...

Страница 231: ...3 5 Reverse power protection 3 13 RF level units 3 57 RF level utility 3 59 RF output 5 4 S Safety testing routine 2 8 Second modulation oscillator Appendix A A 1 Sequential calling tones 3 37 Softwar...

Страница 232: ...ght or licence other than that stipulated herein 4 4 The Licensee may make not more than two copies of the Licensed Software but not the Authoring and Language Manuals in machine readable form for ope...

Страница 233: ...Aeroflex as the intended country of use of the Licensed Software at the commencement of this Agreement 8 3 Aeroflex shall not be liable to the Licensee for any loss of use or for loss of profits or of...

Страница 234: ...45 9614 0045 Fax 45 9614 0047 SPAIN Tel 34 91 640 11 34 Fax 34 91 640 06 40 UK Burnham Tel 44 0 1628 604455 Fax 44 0 1628 662017 UK Stevenage Tel 44 0 1438 742200 Fax 44 0 1438 727601 Freephone 0800 2...

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