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2948

1. Ret TRANSIENT ANALYSIS T Level Ref Level 1 35 5dBm 1 dBzdivw 1 H i Mar ker N Tris Te iager ti i Level Level T 33 0dB I ee Arm Tris ve edae Pre Tria j 1 S 25 h TA Tx Frea 164 999200MHz iv Mkr 34 8dBm Bus After Trisser Transient Analysis The ability to capture transients on the rising or falling edge of a waveform provides a valuable tool for fault finding radios and radio systems The user has full control of the trigger level and input attenuation as well as the timebase and five fixed trigger points making this feature simple and flexible to operate Harmonic Analysis An automatic harmonic analysis function is included in the 2948 This complements the fast spectrum analyzer and allows a rapid check that the transmitter under test is not producing any excessive harmonics Tones Generation and Decoding The tones menus include full remote control so that radio workshops can further automate their tasks and better control the tones from the top level screens POCSAG Decode built in option Off air decoding of POCSAG signals is provided as an option This allows tone numeric and alphanumeric messages to be displayed Signals with bit rates of up to 4800 bits s can be automatically decoded making the 2948 an ideal surveillance tool The 2948 can be set to detect all messages a user selectable RIC just like a pager or a fixed message string mm __ RF POCSAG DECO
2. Reverse Power Protection N Type 50 W 10 minutes normal operation 150 W for 1 minute at 20 C Overload indicated by audible and visual warning BNC 5 W Overload indicated by audible and visual warning Output Impedance Nominally 50 Q VSWR N Type Better than 1 2 1 up to 500 MHz Better than 1 35 1 up to 1 05 GHz BNC Better than 2 2 1 up to 1 05 GHz SPECTRAL PURITY Residual FM Less than 6 Hz RMS 0 3 to 3 4 kHz up to 500 MHz Less than 12 Hz RMS 0 3 to 3 4 kHz up to 1 05 GHz Harmonics 25 dBc Spurious Signals Better than 50 dBc SSB Phase Noise 20 kHz offset Better than 112 dBc Hz up to 500 MHz Better than 108 dBc Hz up to 1 GHz RF Carrier Leakage Less than 0 5 uV PD generated in a 50 Q load bya 2 turn loop 25 mm from the case Output level less than 40 dBm into a sealed 50 Q load AMPLITUDE MODULATION INTERNAL Frequency Range 400 kHz to 1 05 GHz AM Depth Range 0 to 99 Resolution 1 Indication 2 digits Setting Keyboard entry delta increment decrement function and rotary control Accuracy For carrier frequencies from 1 5 MHz to 1 GHz 5 at 50 for modulation frequency of 1 kHz For carrier frequencies from 1 5 MHz to 400 MHz 7 1 digit for modulation frequency of 1 kHz 10 1 digit for modulation frequencies from 50 Hz to 5 kHz 15 1 digit for modulation frequencies from 50 Hz to 15 kHz Distortion Less than 2 at 1 kHz for 30 AM CCITT weighted Modulation Freque
3. 2948 is ideal for carrying the side handle ensures that the instrument is clear of the stairs when ascending buildings and the 2948 s depth is suitable for the instrument to be operated comfortably when it is placed on the floor An optional bail arm handle is also available This option allows a stowage cover to be fitted over the front panel for storage of adaptors and further protection to the instrument s front aden Full operation is possible from the protective ever ready case so that your investment is protected from transit damage Stored settings may be recalled from internal memory or from a memory card allowing fast and straightforward setting up Fast Full Performance Spectrum Analyzer provided as standard The spectrum analyzer provides spans from 100 Hz per division to 100 MHz per division and also has a fully adjustable reference level Speed is comparable with analog analyzers allowing real time adjustments over a full 80 dB dynamic range With the tracking generator provided as standard duplexers and filters Ref SPECTRUM ANALYZER central ef Leve Frea k rea re a Ree Sen On F fi Frea rack E Sianal Gen l i 1 Find 1 re 508 01933MHz Span 21 49kHz Res Bi Res Bll 360Hz i Cents Mer 18 5d8m 598 01826MHz can be aligned quickly and easily An offset facility pro
4. provides a DOS based filing system that allows transfer of information to a PC fitted with a memory card slot Test setups test results screen dumps spectrum analyzer co ordinates and test sequences can all be stored on the memory card allowing information to be easily stored and retrieved when required Reliability The 2948 features high integration and a chassis designed to maximise mechanical protection Audio Analysis A comprehensive range of filters are rovided as standard including band pass ow pass and high pass Optional filters are available for psophometric weighting of audio signals and demodulation of signals in a simulated radio channel bandwidth The direct measurement of CTCSS is possible with the 300 Hz LP filter even with speech present Two comprehensive audio generators are provided as standard for internal modulation or audio sources for transmitter stimulus External DC coupled FM is provided Comprehensive Oscilloscope Analysis of audio signals whether from the demodulated signal or the audio input direct can be viewed for further inspection The oscilloscope can either be combined with the measurement screen in the Tx Rx or AF test modes or zoomed to a full screen display Different levels of persistence can be selected to allow short or long term effects to be captured
5. to 3 4 kHz Bandpass 300 Hz Highpass 750 us de emphasis 50 kHz Lowpass No filters applied AMPLITUDE MODULATION Frequency Range 400 kHz to 1 05 GHz Modulation Frequency Range 10 Hzto 15 kHz AM Depth Range 0 to 99 manually tuned 0 to 90 below 100 MHz 0 to 80 from 100 to 400 MHz Resolution 1 AM Indication 2 digits and bar chart Accuracy 5 1 digit at 1 kHz 8 5 1 digit from 50 Hz to 10 kHz Demodulation Distortion Less than 2 at 1 kHz and 30 AM CCITT weighted Residual AM Less than 1 300 Hz to 3 4 kHz Demodulation Output 50 mV peak to peak for 1 AM FREQUENCY MODULATION Frequency Range 400 kHz to 1 05 GHz Modulation Frequency Range 10 Hzto 15 kHz Deviation Range 0 to 75 kHz Resolution 10 Hz below 2 kHz deviation 1 above 2 kHz deviation Indication 3 digits and bar chart Accuracy 5 resolution at 1 kHz modulation frequency 7 5 resolution for modulation frequencies 50 Hz to 10 kHz Demodulation Distortion Less than 2 at 1 kHz and 5 kHz FM CCITT weighted Residual FM Less than 30 Hz 300 Hz to 3 4 kHz Demodulation Output Socket 200 mV peak to peak 10 per 1 kHz deviation RF Spectrum Analyzer Frequency Range 400 kHz to 1 05 GHz Spans 1 kHZ division to 100 MHz division in a 1 2 5 sequence or continuously variable Start stop facility allows selection of infinitely variable span width Resolution Bandwidth 300 Hz 3 30 300 kHz 3 MHz
6. 45 Microphone with PTT 59000 189 Memory Card 128k 46662 571 Ever Ready Case 46662 616 Ever Ready Case for use with Option 30 54112 163 Hard Transit Case 54431 023 20 dB AF attenuator BNC 46884 728 Rack Mounting Kit 54421 001 BNC Telescopic Antenna 46884 650 Serial port to PC control cable 9 way 46884 649 Serial port to PC control cable 25 way 46884 648 RS 232 Printer cable 25 way 54421 016 Fit Fast Installation Tester 70 1000 MHz with adaptor 59999 170 RF Directional Bridge 54421 002 RF Directional Power Head 1 to 50 MHz 54421 003 RF Directional Power Head 25 to 1000 MHz 54432 012 Wideband Amplifier 100 Hz to 500 MHz 46880 082 Service Manual t Options 4 and 5 can not be fitted together t Options 23 and 24 can not be fitted together IFR Americas Inc 10200 West York Street Wichita Kansas IFR Ltd Longacres House Norton Green Road Stevenage Herts 67215 8999 USA E mail info ifrsys com SG1 2BA United Kingdom E mail info ifrinternational co uk Tel 1 316 522 4981 Toll Free USA 1 800 835 2352 Fax 1 316 522 1360 Tel 44 0 1438 742200 Freephone UK 0800 282 388 Fax 44 0 1438 727601 As we are always seeking to improve our products the information in this document gives only a general indication of the product capacity performance and suitability none of which shall form part of any contract We reserve the right to make design changes without notice All trademarks are acknowledged
7. A ll the benefits of the 2945A but with a low phase noise signal generator for the more critical receiver testing WE Low phase noise signal generator W High stability reference oscillator OCXO as standard E Accurate power measurement to 150 W E Transient and harmonic analysis E Fast response high resolution bar charts for peaking and nulling E Tracking generator with full offset tracking E Full span spectrum analyzer with live look and listen The 2948 Communications Service Monitor is the lightest most rugged service monitor available with low phase noise signal generation For field work the 2948 provides an excellent combination of instruments for all types of maintenance work In the workshop it provides all of the performance you would expect for exacting measurements Low Phase Noise Signal Generator The 2948 differs from its 2945A cousin by providing a low phase noise signal generator as standard This enhanced capability allows accurate measurement of the noise characteristics of all FM receivers and is especially beneficial when making accurate measurement of narrow band receivers The performance of the 2948 enables signal to noise measurements of better than 46 dB to be made on receivers with 12 5 kHz channel spacing Field Operation At under 12 kg the 2948 lightens the http www ifrinternational com 2948 Low Phase Noise Communications Service Monitor load to remote sites The shape of the
8. DER r FREQ 466 G7 686MHz Seau RIC gapgagA i Alehanumeric Tx All Fres 1 208BkHz RIC Hor mal 6377168 AAAA be edeee pappe C11 Decode Text Message For Addr Aller Messaa 26 If poss call Bob in office Decode Errored Codewords Corrected Specification RF Signal Generator FREQUENCY Frequency Range 400 kHz to 1 05 GHz Resolution 10 Hz Indication 10 digit display Setting Keyboard entry delta increment decrement function and rotary control Accuracy As frequency standard RECEIVER TEST GEN FREQ 153 12500NHz AUDIO FREQ 1 G00akH2 PD LEVEL 8 202 LEVELS dean Mod Geni mobi FREQ 1 9000KH2 Sin LEVEL 1 250kHz RF Gen pF MOb2 FREQ Tones Filter Sin LEVEL 50gHz SOmu div 20Que diy pay EXT LEVEL 50Hz istin SOURCE Ext Mod ive TEN Increments i MODI FREQ 10 Hz Score AF FILTER 8 3 to 3 4kHz Bar COUPLING AC OUTPUT LEVEL Output Level Range Rx Test N Type socket 141 dBm to 21 dBm BNC socket 115 dBm to 5 dBm overrange to 7dBm Resolution 0 1 dB Indication 4 digits plus sign dBm dBuV uV mV PD EMF Accuracy 2 dB for level above 127 dBm on N Type socket http www ifrinternational com up to 1 GHz
9. PTION 10 NMT 450 NMT 900 Benelux NMTF Austria Spain Malaysia Indonesia Saudi 1 Saudi 2 Thailand Oman Tunisia Hungary Poland Russia Czech Bulgaria Slovenia Turkey USER DEFINED NMT AMPS CELLULAR SOFTWARE OPTION 11 E AMPS N AMPS USER DEFINED AMPS TACS CELLULAR SOFTWARE OPTION 12 E TACS TACS 2 C TACS II N TACS C TACS J TACS USER DEFINED TACS MPT 1327 TRUNKING SOFTWARE OPTION 13 BAND III JRC UK WATER HONG KONG AUTONET AMT MADEIRA NL TRAXIS NZ MPT1327 PH INDO USER DEFINED MPT PMRTEST SOFTWARE OPTION 14 USER DEFINED PMR for FM radio s EDACS RADIO TEST SOFTWARE OPTION 15 Provides Auto Manual test capability for EDACS radios Up to 4 User defined variants can be created and stored each with up to 24 spot channel frequencies EDACS REPEATER TEST SOFTWARE OPTION 16 Provides Auto Manual test capability for EDACS repeaters Up to 4 user defined variants can be created and stored each with up to 24 spot channel frequencies A data logging facility is also available to continuously decode and display data messages from the repeater under test EDACS is an Ericsson GE registered trademark IFR is an EDACS trunking licensee POCSAG DECODE OPTION 22 Allows off air decoding of POCSAG messages Can http www ifrinternational com decode a message as it is received or decoding can Versions and Accessories Ae ate a user selectable RIC code or fixed When ordering please quote th
10. Parent Company IFR Systems Inc IFR Ltd 1999 Part no 46891 019 SD 2018 PA http www ifrinternational com re
11. Reference Level top of screen 50 dBm to 52 dBm 0 7 mVto 71 V On Screen Dynamic Range 80 dB On Screen Linearity Typically 2 dB 1 resolution 10 dB div 10 dB above noise floor 2948 Vertical Resolution 0 1 dB on 2 dB division 0 5 dB on 10 dB division Level Flatness 2 dB resolution 10 dB div Intermodulation Distortion Better than 70 dB for two signals at 30 dBm into first mixer Ba T O y Q Ke fo a 1 1 14 av 5 Sweep Speeds 10 ms div to 200 ms div in a 1 2 5 sequence optimum sweep speed and bandwidth selected according to span or user selectable Span Resolution Update Bandwidth Sweeps sec 10 kHz 300 Hz 5 100 kHz 3 kHz 9 1 MHz 30 kHz 9 10 MHz 300 kHz 9 100 MHz 300 kHz 5 1000 MHz 3 MHz 5 Marker Indication Level and frequency or delta marker from centre line of screen Single marker for frequency and level display Marker to centre frequency marker Features Simultaneous Look and Listen spans 100 kHz 200 kHz 500 kHz 1 MHz Start stop frequency entry Sensitivity 2 uV Tracking Generator Offset 0 999 MHz FREQUENCY Frequency Range 10 Hz to 20 kHz sine or square Setting Keyboard entry delta increment decrement function and rotary control Indication 5 digits Resolution 0 1 Hz below 3 25 kHz 1 Hz above 3 25 kHz AUDIO TEST AUDIO FREQ 1 0001kHz LEVEL 106ml u
12. d Tone length 20 ms to 1 s Standard tone frequencies may be selected from a menu Generation and decoding of DTMF tones GPIB OPTION 5 Capability For printing remote instrument control or for programming of user defined test sequences Complies with the following subsets defined by reba SH1 AH1 16 L4 SR1 RL1 DTO El DC1 RS 232C interface is provided for printing and remote instrument control Connector 9 way female D Type POWER REQUIREMENTS AC Supply Voltage amp Frequency Generation and decoding of DCS Digitally Coded Squelch Generation of POCSAG code CCIR No 1 Rec 584 Bit rates from 400 to 4800 bit s Inversion available AUDIO MONITOR Demodulated signals and audio signals may be monitored via the internal loudspeaker and the accessory socket output on the front panel ellular and Trunking Test Modes Auto test manual test Auto Test Programs Call processing only Call and RF testing Brief testing Comprehensive testing Parametric Auto Test Routines AF Frequency AF Level FM Deviation Mod frequency Rx Distortion Rx expansion Rx sensitivity Rx SINAD Rx S N Tx Compression Tx Distortion Tx frequency Tx Level Tx Power Level Tx Limiting Tx Mod Level Tx Noise Tx SINAD Tx S N Signaling Auto Test Routines Registration Roaming Update Place Call Page Mobile Clear from Land Clear from Mobile Handoff Hook Flash DTMF Decode Data Performance On PTT Off SAT Deviation SAT Freque
13. dio AF1 FREQ 1 9900kHz Ben Sin LEVEL 160 mU AF2 FREQ 67 GHz AF Sin LEVEL 100 0m Off Samvediy 20Gusediy Filter Audio Increments Pista AFL FREQ LBAHZ i AF1 LEVEL 16 mu Tones AF FILTER 6 3 to 3 4kHz Scope COUPLING AC Bar Accuracy 0 01 Hz below 180 Hz 0 1 Hz above 180 Hz LEVEL Level Range 0 1 mV to 4 VRMS Setting Keyboard entry delta increment decrement function and rotary control Indication 4 digits Resolution 0 1 mV below 409 mV 1 mV above 409 mV Accuracy 5 resolution 50 Hz 15 kHz Output Impedance Nominally 5 Q minimum load 25 W Distortion Less than 0 5 at 1 kHz Wh ryt a 2948 Less than 1 from 50 Hz to 15 kHz Signaling Encoder Decoder Sequential tones functions including revert User defined tones Encodes and decodes up to 40 tones Accessory Port General Keyboard and Display Logical colour coded keyboard with bright high resolution fast LCD Connector 9 way female D type Outputs 4 independently programmable output lines each CCIR ZVEI DZVEI EEA EIA or user defined Display Size I mat Any of the tones may be extended f 160 x85 mm one conhgura oS asa logie ine or as a relay contact Continuous burst and single step modes available REC pply Up to two frequency plans may be defined and stored within the 2948 for sequential tones Any of the standard tone frequency plans may be copied to user defined and modifie
14. e Easy With the parallel printer port interface screen dumps automatic test results or previously stored results may be sent to most paralel printers These facilities are available as standard using the serial RS 232 interface A screen capture facility is available so any screen displayed on the 2948 can be saved direct to a PC via the serial port as a bit map file Autorun internal control With the Analog Systems Card fitted automatic testing without an external controller is possible Custom tests may be written and run by the operator Four programmable relay contacts are provided with the optional parallel printer interface This allows remote control of radios or test fixtures from built in automatic tests Custom Programs Users may program the instrument to suit their own specific needs This is possible either by configuring any of the 4 built in programs or by using the MI BASIC interpreter to produce a customised test program that can be executed internally without an external controller h HRES PROGRAM MENU call i m H SET UP PROGRAM fest Briar briet CALL PROCESSING ONLY TESTING BRIEF TESTING COMPREHENSIVE TESTING USER DEFINED TEST DENE def ined AUTO DATA Memory Card with real time clock The memory card drive meets the PCMCIA standard format for PC cards The 2948
15. e full ordering number information Bit Rate Automatically decodes any standard bit rate up to Ordering 4800 bits s Numeric or alphanumeric decoding is numbers Versions provided i a 2948 Low Noise Communications Service Monitor Number of received errors is displayed Options CCITT FILTER OPTION 23 Option 1 600 Q Matching Unit Allows a CCITT filter to be inserted into either the Option 2 Analog Systems Card demodulated audio path or the audio input path Option 4 Parallel Interfacet CMESS FILTER OPTION 24 Option 5 GPIB Interfacet Allows a CMESS filter to be inserted into either the Option 6 Memory Card Drive with real time clock Option 8 SSB demodulator demodulated audio path or the audio input path Note Option 2 required when ordering any BAIL ARM FRONT COVER OPTION 30 of the following options 10 to 16 Provides a Bail arm carrying handle and front panel Option 10 NMT Cellular cover and storage area The Bail arm will also Option 11 AMPS Cellular provide additional viewing angles when mounted on a bench Option 12 TACS Cellular Option 13 MPT 1327 trunking Notes Option 14 PMRTEST 1 At low modulation levels the residual AM FM may a ia 5 EDAS Radio T st become significant p ion 16 EDACS Repeater Test Option 22 POCSAG Decode Option 23 CCITT Filtert Option 24 CMESS Filtert Option 30 Bail Arm and Front Panel Stowage Supplied Accessories AC Supply lead DC Supply lead Operating Manual Optional Accessories 44991 1
16. ers Weight Less than 12 kg standard version Options and Accessories 600 Q MATCHING UNIT OPTION 1 Switchable 600 Q balanced audio input and output Switchable 20 dB attenuator on AF generator output ANALOG SYSTEMS CARD OPTION 2 This option provides automatic testing for cellular trunked and FM radios and a BASIC Interpreter for customised tests PARALLEL INTERFACE OPTION 4 Allows direct connection of a parallel printer Additionally provides 4 software programmable output lines Printer Port Connector 25 way female D type Printers Supported 75 100 150 dots per inch laser printers FX 80 FX 100 Epson format MEMORY CARD DRIVE AND REAL TIME CLOCK OPTION 6 The memory card facility allows the storage of results set ups screen dumps and user programs with SRAM cards Meets PCMCIA 2 standard Allows the current date and time to be stored with results to the memory card and or printed with a screen dump SSB DEMODULATOR OPTION 8 The SSB demodulator allows signals to be demodulated either via the internal loudspeaker or via the accessory socket Provides demodulation of SSB signals upper and lower sideband Frequency Range 400 kHz to 1 GHz AF Demodulation Range 10 Hzto 15 kHz Distortion Typically less than 3 at 1 kHz 300 to 3 4 kHz Detection Range 2 uV to 150 W Features Automatic detection of USB or LSB BFO can be used for tuning of carrier for AM and FM radio s NMT CELLULAR SOFTWARE O
17. his allows testing of duplex radios as well as simultaneous testing of repeater transmit and receive paths There are no Wk Wireless Radio Test Sets IUE 1 2948 restrictions to the duplex offset Cellular and Trunking built in AMPS TACS and NMT analog cellular standards are available internally with all country variants provided in Soe poems Trunking for MPT 1327 1343 and variants of them is also available A new trunking capability has been added with the introduction of EDACS Radio and Repeater test capability Remote control of the inbuilt tests is provided so that measurements can be started and results logged automatically worn t SYSTEM SELECTION MENU SET UP FHR Systems MULTI IPRogRAn mes NO S STEM PR MULTI auro HULTI AHPS MULTI TACS us NeT 450 900 MANUAL MPT 1327 NT 4507206 EDACS REPEATER DATA Network Simulation The 2948 simulates the signalling protocol that the radio would see from the real network This allows calls to be set up and handled enabling receiver and transmitter parametric measurements to be made Remote Control RS 232 or GPIB Remote control is provided with an RS 232 interface as standard An IEEE 488 2 interface option 5 can be fitted where other instruments are required to operate in a system with the 2948 Printing Mad
18. ncy 20 Hz to 20 kHz AMPLITUDE MODULATION EXTERNAL Input Impedance Nominally 10 kQ in parallel with 40 pF Frequency Range As internal AM Modulation Frequency Range As internal AM Sensitivity 1 VRMS for 100 AM FREQUENCY MODULATION INTERNAL Frequency Range 400 kHz to 1 05 GHz Maximum Deviation 75 kHz Indication 3 digits Settin g Keyboard entry delta increment decrement function and rotary control Accuracy 7 at 1 kHz modulating frequency 10 at modulating frequencies from 50 Hz to 15 kHz Distortion Less than 1 at 1 kHz for deviation of 5 kHz CCITT weighted Modulation Frequency Range 20 Hz to 25 kHz Resolution 25 Hz Pre emphasis 750 us selectable FREQUENCY MODULATION EXTERNAL Input Impedance Nominally 10 kQ in parallel with 40 pF Frequency Range As internal FM Modulation Frequency Range DC to 100 kHz Pre emphasis 750 us selectable Sensitivity 1 VRMS for 0 to 75 kHz deviation MICROPHONE INPUT Input Level 2 mV to 200 mV AGC levelled Input Impedance Nominally 150 Q Press To Talk PTT When using the optional microphone in Tx Test mode the PTT will switch instrument to Rx Test Audio Voltmeter Input Impedance Nominally 1 MQ in parallel with 40 pF Frequency Range DC and 20 Hz to 50 kHz AC only 20 Hz to 50 kHz Level Ranges 0 100 mV to 0 100 V RMS inal 3 10 sequence Digital readout also in mW user selectable Resolution 1 mV or 1 of reading I
19. ncy ST Duration ST Frequency ST Deviation DSAT Deviation Frequency Standard Internal Frequency Standard OCXO Frequency 10 MHz Temperature Stability Better than 5 parts in 108 0 to 55 C Ageing Rate Better than 1 part in 10 per year after 1 month continous use Warm up Less than 10 minutes to within 2 parts in 107 at 20 C External Frequency Standard Input Frequency 1 2 5 and 10 MHz Input Level Greater than 1 V peak to peak Input Impedance Nominally 1 kQ 90 V to 264 V 45 Hz to 67 Hz 90 V to 132 V 45 Hz to 44 Hz Maximum AC Power 190 VA DC Supply Voltage 11 to 32 V Maximum DC Power 100 W Electromagnetic Compatibility Conforms with the protection requirements of Council directive 89 336 EEC Complies with the limits specified in the following standards EN55011 Class B CISPR 11 EN50082 1 IEC 801 2 3 4 EN60555 2 IEC 555 2 Safe ty Complies with IEC 1010 1 BS EN61010 1 for class 1 portable equipment and is for use in a pollution degree 2 environment The instrument is designed to operate from an installation category 1 or 2 supply Approved to UL3111 1 ENVIRONMENTAL Rated Range of Use 0 to 50 C and up to 95 relative humidity at 40 C Storage and Transport Temperature 40 to 71 C Altitude Up to 2500 m pressurised freight at 27 kPa differential DIMENSIONS AND WEIGHT Height 178 mm 7 in Width 380 mm 15 in Depth 457 mm 18 in including handle feet and cov
20. ndication 3 digits and bar chart Accuracy AC 3 3 mV resolution up to 30 VRMS Accuracy DC 1 50 mV up to 40 V Audio Frequency Meter Frequency Range 20 Hz to 50 kHz Resolution 0 1 Hz less than 10 kHz 1 Hz at 10 kHz and above Indication 5 digits Accuracy As frequency standard 1 digit resolution Sensitivity 50 mV Audio SINAD Meter Frequency 1 kHz Range 0 to 18 dB and 0 to 50 dB Resolution 0 1 dB Indication 3 digits and bar charts Accuracy 1dB Sensitivity 50 mV 100 mV for 40 dB SINAD reading suppressed if audio voltage is less than 5 mV Audio Distortion Meter Frequency 1 kHz Range 0 to 10 and 0 to 30 Resolution 0 1 distortion Indication 3 digits and bar charts Accuracy 1 dB of reading 0 5 distortion Sensitivity 50 mV 100 mV for 1 distortion reading suppressed if audio voltage is less than 5 mV Audio S N Meter Range 0 to 30 dB and 0 to 100 dB Resolution 0 1 dB Indication 3 digits and bar chart Accuracy 1 dB Sensitivity 50 mV 100 mV for 40 dB S N reading suppressed if audio voltage is less than 5 mV Audio Oscilloscope Operating Modes Single or repetitive sweep Frequency Range DC to 50 kHz 3 Hz to 50 kHz AC coupled Voltage Range 10 mV to 20 V per division in a 1 2 5 sequence Voltage Accuracy 5 of full scale FM Ranges 75 30 15 6 3 and 1 5 kHz deviation full scale 10 accuracy AM Ranges 20 10 and 5 per divi
21. ontinuous Rating N Type 50 W at 20 C BNC output 5 W Antenna port 1 W Intermittent Rating N Type 150 W for limited periods typically 1 minute at 20 C Overload indicated by audible and visual warning TRANSMITTER TEST Buto R TS FREQ 294 500010MHZ Ture OH Auto tune POWER 3 Gd5m WE i Tx Fres ee eRe hops HOD FREQ 1 0000kHz EH LEVELE 2lageHe 2083 AF2 FREG 1 0008kH2 Poets Sin LEVEL 190 0mU Off ikHz div ERE 20Gus div Broad In Pur Increments AFL FREG 10OHZ AFL LEVEL 10 my i IF FILTER Z kHz a Fitter a3 to seas HAAA Harmonic and Transient Analysis Harmonic Measurement Displays 1st to 5th harmonic of the selected carrier Maximum Harmonic Frequency 1 05 GHz Dynamic Range 0 to 60 dBc TRANSIENT POWER ANALYSIS Displays power profile against time Frequency Range 1 to 1050 MHz Dynamic Range 60 dB below spectrum analyzer reference level Scale power 10 dB div Scale time 50 us division to 5 s div Trigger Level Adjustable over full dynamic range ve or ve trigger selection Pre trigger 0 25 50 75 or 100 of displayed period http www ifrinternational com Modulation Meter Sensitivity Autotuned 5 mW N Type 0 05 mW Antenna port Manual Tuned 34 dBm N Type 60 dBm Antenna port Audio and Modulation Filters 300 Hz 3 kHz 15 kHz Lowpass 300 Hz
22. sion 10 accuracy Timebase 50 us div to 5 s divin a 1 2 5 sequence Graticule 10 Horizontal by 6 Vertical divisions Special features Built in antialiasing circuitry and variable decode trigger level Audio Bar Charts Bar chart Displays AF Voltage SINAD Distortion S N Vertical Resolution 2 of full scale Ranging Autoranging range hold or manual selection 1 2 5 sequence with hysteresis Audio and Modulation Filters 300 Hz 3 kHz 15 kHz Lowpass 300 Hz to 3 4 kHz Bandpass 300 Hz Highpass 750 us de emphasis 50 kHz Lowpass No filters applied Audio Analyzer General Features Tones Mode RF Frequency Meter Frequency Range 400 kHz to 1 05 GHz manual tune 10 MHz to 1 GHz autotune Resolution 1 Hz or 10 Hz selectable Indication Up to 10 digits Accurac As frequency standard resolution Acquisition Time Less than 1 second manual Typically 3 seconds autotune Sensitivity Autotuned 5 mW N Type 0 05 mW Antenna port are Tuned 34 dBm N Type 60 dBm Antenna port VSWR N Type Better than 1 2 1 up to 500 MHz Better than 1 25 1 up to 1 05 GHz BNC Better than 3 1 up to 1 05 GHz RF Power Meter Broadband Frequency Range 200 kHz to 1 05 GHz Dynamic Range 5 mW to 150 W N Type 0 05 mW to 250 mW Antenna port Indication Units Watts dBm or dBW Indication 3 digits or barchart Resolution 0 1 dB max typically 1 Accuracy N Type 10 resolution up to 1 GHz Maximum C
23. vides testing of equipment with frequency translation Channel stepping can be performed by defining an increment and then using the FREQ t keys This is particularly useful when testing multi channel systems Live Look and Listen This feature puts the 2948 above all of its peers with the ability to examine signals on the screen and demodulate them simultaneously Intermittent interference can be isolated quickly and the signals then easily identified The trace can be saved to memory card along with the time and date providing factual evidence that can be recalled later This feature is particularly useful when looking for rogue transmissions especially on busy base station sites From 2 pV to 150 Watts The 2948 measures the power of low level signals such as those encountered when monitoring off air signals or those found when probing a circuit 150 Watts measurement is provided without the need for external attenuators so the high power of base stations can be measured directi Measurement accuracy of better than 10 is guaranteed all the way down to 5 mW on the N Type connector allowing cellular radios to be qualified at low power levels Accurate RF Signals The signal generator provides coverage from 400 kHz to 1 05 GHz with 5 dBm output 7 dBm overrange and fast switching speed Level accuracy is 2 dB at all levels above 127 dBm Duplex provided as standard Full duplex operation is provided by the 2948 T

2948

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