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Wireless
2948 Low Phase Noise
Communications Service Monitor
All the benefits of the 2945A but with a low phase noise signal generator, for the more critical receiver testing
* * * * * * *
Low phase noise signal generator High stability reference oscillator (OCXO) as standard Accurate power measurement to 150 W Transient and harmonic analysis Fast response high resolution bar charts for peaking and nulling Tracking generator with full offset tracking Full span spectrum analyzer with `live' look and listen
Field Operation At under 12 kg the 2948 lightens the load to remote sites. The shape of the 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 adapters and further protection to the instrument's front panel. 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 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-tonoise measurements of better than 46 dB to be made on receivers with 12.5 kHz channel spacing.
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 the displayed dynamic range. With the tracking generator provided as standard, duplexers and filters can be aligned quickly and easily. An offset facility provides testing of equipment with fre-
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quency translation. Channel stepping can be performed by defining an increment and then using the FREQ 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 V 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 directly. 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. This allows testing of duplex radios as well as simultaneous testing of repeater transmit and receive paths. There are no 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 each package. Trunking for MPT 1327/1343 and variants of them is also available. A new trunking capability has been added with the introduction of EDACSTM Radio and Repeater test capability. Remote control of the inbuilt tests is provided, so that measurements can be started and results logged automatically.
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 Made Easy With the parallel printer port interface, screen dumps, automatic test results or previously stored results may be sent to most parallel 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.
Memory Card - with real time clock The memory card drive meets the PCMCIA standard format for PC cards. The 2948 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 provided as standard, including band pass, low 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.
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.
T comprehensive audio generators are provided as standard for wo 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.
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
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.
OUTPUT LEVEL Output Level Range Rx Test: N-Type socket: -141 dBm to -21 dBm BNC socket: -115 dBm to +5 dBm (overrange to +7 dBm) Resolution 0.1 dB Indication 4 digits plus sign (dBm, dBV, V, mV PD/EMF). Accuracy 2 dB for level above -127 dBm on N-Type socket up to 1 GHz 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 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
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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 V PD generated in a 50 load by a 2 turn loop 25 mm from the case. Output level less than -40 dBm into a sealed 50 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 400 MHz 5% at 50% for modulation frequency of 1 kHz. 7% 1 digit for modulation frequency of 1 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 Frequency 20 Hz to 20 kHz AMPLITUDE MODULATION - EXTERNAL Input Impedance Nominally 10 k in parallel with 40 pF Frequency Range As internal AM Modulation Frequency Range As internal AM Sensitivity 1 V RMS for 100% AM
FREQUENCY MODULATION - INTERNAL Frequency Range 400 kHz to 1.05 GHz Maximum Deviation 75 kHz Indication 3 digits Setting Keyboard entry, delta increment/decrement function and rotary control Accuracy (1) 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 s selectable FREQUENCY MODULATION - EXTERNAL Input Impedance Nominally 10 k in parallel with 40 pF Frequency Range As internal FM Modulation Frequency Range DC to 100 kHz Pre-emphasis 750 s 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 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 M in parallel with 40 pF Frequency Range DC and 50 Hz to 50 kHz AC only 50 Hz to 50 kHz Polarized DC (below 1 Hz)
Maximum input voltage 30 VRMS, 50 Vdc Level Ranges 0 - 100 mV to 0 - 100 V RMS in a 1, 3, 10 sequence Digital readout also in mW (user selectable) Resolution 1 mV or 1% of reading Indication 3 digits and bar-chart Accuracy AC 3% 3 mV resolution up to 30 V RMS Accuracy DC 1% +50 mV up to 40 V
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 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 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 division, 10% accuracy Timebase 50 s/div to 5 s/div in a 1, 2, 5 sequence Graticule 10 Horizontal by 6 Vertical divisions Special features Built in antialiasing circuitry and variable decode trigger level
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 1 dB 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%
AUDIO BAR CHARTS
Bar-chart Displays AF Voltage, SINAD, Distortion, S/N
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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 s de-emphasis 50 kHz Lowpass (No filters applied) Audio Analyzer General Features Tones Mode
Resolution 0.1 dB max, typically 1% Accuracy (N-Type) 10% resolution up to 1 GHz Maximum Continuous 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.
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, up to 1050 MHz, selectable 0.1 Hz, 1 Hz or 10 Hz up to 999 MHz, selectable Indication Up to 10 digits Accuracy 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) Manual 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
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 s/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
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 bar-chart
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 to 3.4 kHz Bandpass 300 Hz Highpass 750 s de-emphasis 50 kHz Lowpass (No filters applied) AMPLITUDE MODULATION Frequency Range 400 kHz to 1.05 GHz Modulation Frequency Range 10 Hz to 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(1) 5% 1 digit at 1 kHz 8.5% 1 digit from 50 Hz to 10 kHz Demodulation Distortion(1) 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 Hz to 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(1) 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 Reference Level (top of screen) -50 dBm to +52 dBm 0.7 mV to 71 V Displayed Dynamic Range 80 dB Noise floor Typically 75 dB below top of screen On Screen Linearity Typically 2 dB 1 resolution (10 dB/div) 10 dB above noise floor 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 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 10 kHz 100 kHz 1 MHz 10 MHz 100 MHz 1000 MHz 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 Resolution Bandwidth 300 Hz 3 kHz 30 kHz 300 kHz 300 kHz 3 MHz Update (Sweeps/sec) 5 9 9 9 5 5
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Sensitivity 2 V Tracking Generator Offset/Frequency Range 0-999 MHz/400 kHz to 1000 MHz
Signaling Encoder/Decoder Sequential tones functions including revert User defined tones Encodes and decodes up to 40 tones. CCIR, ZVEI, DZVEI, EEA, EIA or user defined. Any of the tones may be extended. Continuous, burst and single step modes available. 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 modified. Tone length 20 ms to 1 s. Standard tone frequencies may be selected from a menu. Generation and decoding of DTMF tones. 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.
AUDIO GENERATORS
FREQUENCY Frequency Range 10 Hz to 25 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
CELLULAR 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 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 (minimum load 25 W) Distortion Less than 0.5% at 1 kHz Less than 1% from 50 Hz to 15 kHz AF Frequency FM Deviation Rx Distortion Rx sensitivity Rx S/N Tx Distortion Tx Level Tx Limiting Tx Noise 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 PTT On PTT Off SAT Deviation SAT Frequency ST Duration ST Frequency ST Deviation DSAT Deviation AF Level Mod frequency Rx expansion Rx SINAD Tx Compression Tx frequency Tx Power Level Tx Mod Level Tx SINAD
FREQUENCY STANDARD
Internal Frequency Standard (OCXO) Frequency 10 MHz Temperature Stability Better than 5 parts in 108, 0 to 55C Ageing Rate Better than 1 part in 107, per year, after 1 month continous use Warm up Less than 10 minutes to within 2 parts in 107 at 20C External Frequency Standard Input Frequency 1, 2, 5 and 10 MHz Input Level Greater than 1 V peak to peak Input Impedance Nominally 1 k
Performance Criteria B Safety Conforms with the requirements of EEC Council Directive 73/23/EEC (as amended) and the product safety standard IEC / EN 61010-1 : 2001 + C1 : 2002 + C2 : 2003 for Class 1 portable equipment, for use in a Pollution Degree 2 environment. The instrument is designed to be operated from an Installation Category 2 supply. CALIBRATION INTERVAL 2 years ENVIRONMENTAL Rated Range of Use 0 to 50C and up to 95% relative humidity at 40C Storage and Transport Temperature -40 to +71C Altitude Up to 2500 m (pressurised freight at 27 kPa differential) DIMENSIONS AND WEIGHT Height 178 mm (7 in)
GENERAL
Keyboard and Display Logical color coded keyboard with bright high resolution fast LCD Display Size 160 x 85 mm RS-232C RS-232C interface is provided for printing and remote instrument control Connector 9 way female `D' Type POWER REQUIREMENTS AC Supply Voltage 100 - 240 V~ / 108 - 118 V~ (Limit 90 - 264 V~/98 - 132 V~) AC Supply Frequency 50 - 60 Hz / 50 - 400 Hz (Limit 45 - 66 Hz / 45 - 440 Hz) Maximum AC Power 190 VA DC Supply Voltage 11 to 32 V Maximum DC Power 100 W CALIBRATION INTERAL 2 years ELECTROMAGNETIC COMPATIBILITY Conforms with the protection requirements of Council Directive 89/336/EEC. Complies with the limits specified in the following standard: IEC/EN61326-1 : 1997, RF Emission Class B, Immunity table 1,
Width 380 mm (15 in) Depth 457 mm (18 in) (including handle, feet and covers) Weight Less than 12 kg (standard version)
OPTIONS AND ACCESSORIES
600 MATCHING UNIT (OPTION 1) INPUT CIRCUIT Impedance 600 Return Loss >21 dB at 1 kHz Frequency Response 0.5 dB at 200 Hz to 5 kHz, 2 dB at 100 Hz to 20 kHz Accuracy of 1:1 input:output ratio 1% at 1 kHz accuracy of 2945A, 2946A or 2948 Maximum Input 5 V RMS maximum at 200 Hz to 5 kHz 3 V RMS maximum at 100 Hz to 20 kHz OUTPUT CIRCUIT Impedance 600 Return Loss >21 dB at 1 kHz
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Frequency response 0.5 dB at 200 Hz to 5 kHz 2 dB at 100 Hz to 20 kHz Level Accuracy 2% at 1 kHz accuracy of 2945A, 2946A or 2948 Output Level 1 mV to 2.5 V RMS across 600 ANALOG SYSTEMS CARD (OPTION 2) This option provides automatic testing for cellular,trunked and FM radios and a BASIC Interpreter for customized 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. Accessory Port Connector 9 way female D type Outputs 4 independently programmable output lines, each one configurable as a logic line or as a relay contact closure. +5V supply available. GPIB (OPTION 5) Capability For printing, remote instrument control or for programming of user defined test sequences. Complies with the following subsets defined by IEEE488:- SH1, AH1, T6, L4, SR1, RL1, DT0, EI, DC1 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 Hz to 15 kHz Distortion Typically less than 3% at 1 kHz (300 to 3.4 kHz) Detection Range 2 V to 150 W
Features Automatic detection of USB or LSB. BFO can be used for tuning of carrier for AM and FM radio's. OCCUPIED BANDWIDTH MEASUREMENT (OPTION 9) Calculates the bandwidth of a signal displayed on the spectrum analyzer. Frequency Range 1 MHz to 1 GHz Display Resolution 3 digits Accuracy 20% Bandwidth Measurement Range 3 kHz minimum Ratio range 90% - 99% selectable in 0.1% steps NMT CELLULAR SOFTWARE (OPTION 10) NMT 450 Benelux Austria Malaysia Saudi 1 Thailand Tunisia Poland Czech Slovenia USER DEFINED NMT NMT 900 NMTF Spain Indonesia Saudi 2 Oman Hungary Russia Bulgaria Turkey
AMPS CELLULAR SOFTWARE (OPTION 11) E-AMPS USER DEFINED AMPS N-AMPS
TACS CELLULAR SOFTWARE (OPTION 12) E-TACS C-TACS I J-TACS USER DEFINED TACS TACS 2 C-TACS II N-TACS
MPT 1327 TRUNKING SOFTWARE (OPTION 13) BAND III UK WATER AUTONET MADEIRA NZ MPT1327 USER DEFINED MPT PMRTEST SOFTWARE (OPTION 14) USER DEFINED PMR for FM radio's JRC HONG KONG AMT NL-TRAXIS PH-INDO
TM EDACSTM RADIO TEST SOFTWARE (OPTION 15)
Provides Auto/Manual test capability for EDACSTM radios. Up to 4 User defined variants can be created and stored, each with up to 24 spot channel frequencies.
TM EDACSTM REPEATER TEST SOFTWARE (OPTION 16)
Provides Auto/Manual test capability for EDACSTM 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 decode a message as it is received, or decoding can be triggered from a user selectable RIC code or fixed message pattern. Bit Rate Automatically decodes any standard bit rate up to 4800 bits/s. Numeric or alphanumeric decoding is provided. Number of received errors is displayed. CCITT FILTER (OPTION 23) Allows a CCITT filter to be inserted into either the demodulated audio path or the audio input path. CMESS FILTER (OPTION 24) Allows a CMESS filter to be inserted into either the demodulated audio path or the audio input path. AVIONICS (OPTION 25) Provides amplitude modulated signals for testing ILS, VOR, Marker Beacons and SELCAL. (Full details of the Avionics features can be found in the 2946A data sheet, part number: 46891-030) BAIL ARM/FRONT COVER (OPTION 30) Provides a Bail arm carrying handle and front panel cover and storage area. The Bail arm will also provide additional viewing angles when mounted on a bench.
Notes (1) At low modulation levels the residual AM/FM may become significant.
Option 14 Option 15 Option 16 Option 22 Option 23 Option 24 Option 25 Option 30
PMRTEST EDACSTM Radio Test EDACSTM Repeater Test POCSAG Decode CCITT Filter CMESS Filter Avionics Bail Arm and Front Panel Stowage AC Supply lead DC Supply lead Operating Manual
Supplied Accessories
Optional Accessories 44991/145 59000/189 59000/375 46662/571 46662/616 54112/163 54431/023 46884/728 54421/001 Microphone with PTT Memory Card (128k) Memory Cadr (2 M) `Ever-Ready' Case `Ever-Ready' Case for use with Option 30 Hard Transit Case 20 dB AF attenuator (BNC) Rack Mounting Kit BNC Telescopic Antenna Serial port to PC control cable (9 way) Serial port to PC control cable (25 way) RS-232 Printer cable (25 way) RF Directional Bridge RF Directional Power Head (1 to 50 MHz) RF Directional Power Head (25 to 1000 MHz) Wideband Amplifier (100 Hz to 500 MHz) Service Manual
VERSIONS AND ACCESSORIES
When ordering please quote the full ordering number information. Ordering Numbers Versions 2948 Options Option 1 Option 2 Option 4 Option 5 Option 6 Option 8 Option 9 600 Matching Unit Analog Systems Card Parallel Interface GPIB Interface Memory Card Drive with real time clock SSB demodulator Occupied Bandwidth Measurement
Note: Option 2 required when ordering any of the following options 10 to 16
46884/650 46884/649 46884/648
Low-Noise Communications Service Monitor
59999/170 54421/002 54421/003 54432/012 46880/082
Options 4 and 5 can not be fitted together. Options 23 and 24 can not be fitted together.
Option 10 Option 11 Option 12 Option 13
NMT Cellular AMPS Cellular TACS Cellular MPT 1327 trunking
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GERMANY Tel: [+49] 8131 2926-0 Fax: [+49] 8131 2926-130 HONG KONG Tel: [+852] 2832 7988 Fax: [+852] 2834 5364 INDIA Tel: [+91] 80 5115 4501 Fax: [+91] 80 5115 4502 KOREA Tel: [+82] (2) 3424 2719 Fax: [+82] (2) 3424 8620
SCANDINAVIA Tel: [+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) 1682 604455 Fax: [+44] (0) 1682 662017
UK Stevenage Tel: [+44] (0) 1438 742200 Fax: [+44] (0) 1438 727601 Freephone: 0800 282388 USA Tel: [+1] (316) 522 4981 Fax: [+1] (316) 522 1360 Toll Free: 800 835 2352
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. Parent company Aeroflex, Inc. (c)Aeroflex 2004.
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Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused.
Part No. 46891/019, Issue 15, 08/04

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