Rev. 1.0 Page 1http://www.avionteq.com/IFR-Aeroflex-COM-120B-Communications-Service-Monitor.aspxwww.avionteq.com
Rev. 1.0 Page 10 Basic Operation and NavigationThis guide will provide some basic operational knowledge to allowconfiguration of the COM-120B but you
Rev. 1.0 Page 11With the cursor still on the INPUT field, notice that the F1 and F2 keylabels offer quick entry of the available selections. Quick en
Rev. 1.0 Page 12Meter functions allow for zooming aswell. In the example to the right, thecursor is placed on the RF Power meterfield label. This al
Rev. 1.0 Page 13SHOWListSTARTSTOPSetting up the Demonstration SoftwareTo access the System Setup Software used in this document, a programmust be acti
Rev. 1.0 Page 14REC – Transmitter Test ScreenExploded view of the function screens that are available in the RECscreen.
Rev. 1.0 Page 15Interconnect:1. Connect the supplied Transmitter RF Output to the COM-120B’s T/RInput.2. Turn the radio to the ON position and set t
Rev. 1.0 Page 16STARTSTOPFind Transmit FrequencySetup:1. This COM-120B has been pre-configured for common transmitter testsetups.2. Press the key to
Rev. 1.0 Page 17TX Frequency TuningEither the Scope or Spectrum Analyzer canbe viewed by positioning the cursor to theSCOPE or ANALYZER field and sele
Rev. 1.0 Page 18Signal Find FeatureThe Signal find feature is a function of the Spectrum Analyzer. To viewthe Spectrum Analyzer press the ANLYZ key o
Rev. 1.0 Page 19STARTSTOPTest Voice DeviationSetup:1. This COM-120B has been pre-configured for common transmitter testsetups.2. Press the key to ac
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Rev. 1.0 Page 208. Position the cursor to the ScopeLabel by pressing [TAB] [1] [ENTER]on the COM-120B’s keypad.9. Press the F1 key labeled “ZOOM” toe
Rev. 1.0 Page 21STARTSTOPThe AF Countermeasures theCTCSS code to 1 Hzresolution. Forgreater resolution,this meter can beexpanded.The Modulation meter
Rev. 1.0 Page 22STARTSTOPThe Modulation meterand Data Decoderhave been configuredfor a 300 Hz Low Passfilter for this test.Test TX Squelch (DCS)Setup:
Rev. 1.0 Page 23STARTSTOPTest TX DTMF DecodeSetup:1. This COM-120B has been pre-configured for common transmitter testsetups.2. Press the key to acc
Rev. 1.0 Page 243. The supplied transmitter does not have a DTMF keypad so the COM-120B’s internal DTMF generator will be used to simulate pressingke
Rev. 1.0 Page 25STARTSTOPTest TX DistortionSetup:1. This COM-120B has been pre-configured for common transmitter testsetups.2. Press the key to acce
Rev. 1.0 Page 26Measuring TX Distortion:1. With the radio configured to channel 2, key the radio and observe a 1kHz tone on the Scope at a level of 3
Rev. 1.0 Page 27This concludes the Transmitter test section of this procedure. If youwould like ot try it out with one of your own radios, you may do
Rev. 1.0 Page 28GEN – Receiver Test ScreenExploded view of the function screens that are available in the GENscreen.The generate screen provides all o
Rev. 1.0 Page 29GEN – Receiver Test ScreenModulation SourcesThe COM-120B can be simultaneously modulated by up to 6modulation sources. AM and FM can
Rev. 1.0 Page 3Thank you for taking the time to evaluate the IFR COM-120B. We knowthat your time is valuable, so we have included a demonstration kit
Rev. 1.0 Page 30STARTSTOPSetup:1. This COM-120B has been pre-configured for common receiver testsetups.2. Press the key to accessthe COM-120B System
Rev. 1.0 Page 31SINAD =Signal + Noise + DistortionNoise + DistortionThe COM-120B has beenconfigured with theAUDIO/DATA Input routedto the scope to vie
Rev. 1.0 Page 32The SINAD meter can be expanded to allow more control by positioningthe cursor to the SINAD meter label [TAB] [1] [6] [ENTER] and pres
Rev. 1.0 Page 33DUPLEX Operation ModeDuplexModeSimultaneous Generate and Receive operation for Full DuplexAny Offset between Generate and Receive freq
Rev. 1.0 Page 34The Duplex screen offers the ability to generate and receive at the sametime. Additionally, the Generate and Receive frequencies may
Rev. 1.0 Page 35This concludes the Receiver test procedure. There are other tests thatcan be performed on the receiver but are beyond the scope of th
Rev. 1.0 Page 36STARTSTOPMeasuring FiltersInterconnect:1. Connect an RF cable to the COM-120B’s AUX RF Output.2. Connect an RF cable to the COM-120B
Rev. 1.0 Page 37The Tracking Generator function allows analysis of:! Filter Insertion Loss! Filter Notch Depth! Filter Pass band! Filter BandwidthT
Rev. 1.0 Page 381. Connect the Duplexer Antenna port to the COM-120B’s AUX RFOutput.2. Connect the Duplexer 160 MHz port to the COM-120B’s Antennapo
Rev. 1.0 Page 39Position the cursor to the Atten fieldand select 0 dB input attenuation bypressing the F2 key. The right sidemay now be evaluated for
Rev. 1.0 Page 4! RF Inputs and Outputs! Audio Inputs and Outputs! Rear Panel! Basic Operation / Navigation! Using the SETUP software! Transmitte
Rev. 1.0 Page 40STARTSTOPMeasuring Cable FaultSetup:1. This COM-120B has been pre-configured for common Analyzer testsetups.2. Press the key to acce
Rev. 1.0 Page 411. Position the cursor to the Markerfield label.2. Press the F1 key to activate marker.3. Press the ENTER key to edit theMarker Fre
Rev. 1.0 Page 42STARTSTOPMeasuring Return LossInterconnect:1. Connect the Return Loss Bridge as indicated in the graphic above.2. Connect the Bridge
Rev. 1.0 Page 433. The menu to the right will appear.4. Select STEP 10 by positioning thecursor and pressing F1 Execute.5. The COM-120B will config
Rev. 1.0 Page 44This concludes the COM-120B Evaluation procedure. If you would likeinformation or assistance with tests not covered by this procedure
Rev. 1.0 Page 45! RF Signal Generator! Output Level +13 to -130! 0.2 PPM TCXO! 2 uV Receiver with 15, 30 and 300 kHz IF filters! 50 kHz Scope! F
Rev. 1.0 Page 46! 0.01 PPM OCXO (120B-xTx)! Internal Rechargeable Battery (AC3001)! Tracking Generator (AC3012)! Return Loss Bridge (AC4105)! Eas
Rev. 1.0 Page 5Off the AirTransmitterconnectionFull DuplexTestingReceiverHalf-Duplextesting+13 dBmTrackingGeneratorOutputTransmitterInputUp to 50Watts
Rev. 1.0 Page 6External Modsource for radiounder testScope / DVM Input(200 VRMS Max)AUDIO / DATASINAD IN(15mV – 15V)EXT MOD IN2 kHz / Vpk Narrow10 kHz
Rev. 1.0 Page 7RS-232 Serial I/ODirect pin to pin connection to PC10 MHz Ext.Reference InputOptionalGPIBInterfaceBatteryCompartmentReplaceableBattery
Rev. 1.0 Page 8For the purpose of demonstration, this demo unit has been configuredwith software to perform specific setups that coincide with thisdoc
Rev. 1.0 Page 91. Remove the connector kit from the Evaluation Kit and Connect the N-BNC adapter to the COM-120B’s T/R RF IN/OUT connector locatedin
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