AV4945 Series Radio Communications Test Set, which is a multifunctional and portable model based on software radio architecture, integrates plentiful functions, like frequency-hopping signal generation and analysis, vector signal generation and demodulation analysis, analog modulation signal generation and demodulation analysis, audio signal generation and analysis, audio oscilloscope, automatic testing and so on. The tester is capable of major performance testes on transmit and receiving of radio communication equipment, measurement and analysis on feature parameters of RF, modulation, audio, and digit etc. Wide applications of the tester cover R&D, production, verification, maintenance and repair, and testing on radio communication equipment, including short-wave/ultra short-wave radio stations, data link systems, communication and surveillance satellites, radio relay equipment. Military mobile carriers with radio communication terminals like communication vehicles, surveillance vehicles, vessels and ships, as well as external field tests can use this tester conveniently.   
 Multiple RF testing functions:sweep spectrum analysis, broadband and narrow band power measurement, frequency error measurement, RF signal source;
 Analog standard communication testing:AM, FM, SSB signal generation and demodulation analysis. Equipped with graphic display of demodulation audio, SINAD, SNR, distortion degree, modulation rate and other measurement functions. The built-in speaker outputs demodulation voice in real-time. Modulation signal generator and  modulation source support external audio and microphone;
 Digital standard communication testing (option):10MHz bandwidth digital vector signal generation and analysis, bit error rate measurement, with real-time output interface of digital demodulation;
 Frequency-hopping testing (option):60MHz transient bandwidth frequency-hopping signal generation and analysis. Frequency-hopping analysis supports measurements types like waterfall chart and frequency-time. Single capture lasts 1.3s at the bandwidth of 60MHz and the time resolution is 10ns;
 Audio signal testing:audio signal generation and analysis, the max. audio input level reaches 30Vrms (high impedance), the max. audio output level reaches 7Vrms (high impedance); capable of measurements on frequency, level, SINAD, SNR and distortion degree; audio generation supports dual-tone output; individual adjustment is available for dual-tone frequency and amplitude, phase is adjustable relatively;
 Dual-channel oscilloscope (option):DC~4MHz;
 Auto testing software:on-line editing of DUT (device under testing) parameters, auto pilot testing, yield of testing reports and other functions. The PTT control interface regulates transmit and receiving of DUT;
 Built-in attenuator with high power: the max. input power is as high as 150W; ;
 Portable structure: external dimensions (without handles): W426×H222×D180mm, easy for carry-on and application;
 Diversified power supply modes:the standard configuration supports AC220V or DC24V,  built-in lithium battery is available;
 Support network interface programming control;
 10.4” large screen, resistor touch screen, English/Chinese interface, interface colors are  free for your choice;
 Support simultaneous operations on multi-function windows, up to 4 windows can be operated at the same time.
Auto testing functions of radio communication equipment
Can create and edit models, parameters and qualified specification limits of DUT. Choose your DUT and connect testing cable, the comprehensive tester will automatically conduct the testing. It controls transmit and receiving of the DUT by PTT. When the DUT needs setup or the cable needs being changed, the tester will automatically halt the testing and indicate further operation. The testing goes on after the operation is finished. Qualified and unqualified items will be listed directly. Other functions, like storage, viewing, comparison and remote readout, are also available.

Transmitter testing
It can conduct simultaneous tests on various performance specifications of transmitters, like signal power, frequency error, signal modulation characteristics, demodulation audio, and so on. Audio signals of transmitters can be provided and single/double tones are available for your choice. It can simulate pilot signals. 

Receiver testing
It’s able to send out FM, AM and SSB RF signals; analyze audio demodulation of the receiver; measures accurately audio frequency, voltage, distortion degree, SINAD and SNR. 

Function as a RF signal generator
Analog modulation of FM, AM, SSB etc and digital modulation of BPSK, QPSK, 8PSK, GMSK,16QAM and so on can all be output. The max. symbol rate of digital modulation is 5MHz. The tester upholds generation of 60MHz transient bandwidth frequency-hopping signals.   

RF receiving and demodulation
The tester is capable of demodulation and analysis of analog modulation like FM, AM, SSB etc and that of digital modulation signals including BPSK, QPSK, 8PSK, GMSK and 16QAM. Demodulation parameters and waveforms can be output. The max. demodulation bandwidth of analog modulation signals reaches 300kHz and the max. symbol rate of digital modulation and signal demodulation is 5MHz. Narrow band power measurement is available.

Sweep spectrum analysis
It enjoys wide frequency band, high resolution, high sensitivity, big dynamic range and other characteristics. 

Frequency-hopping signal analysis
The max. transient analysis bandwidth of frequency-hopping signals is 60MHz. The display types are three-dimensional spectrum graph, time-frequency graph and time-amplitude graph. The tester can capture, store and analyze frequency-hopping signals. You can view spectrum and modulation domain graphs at any time. When modulation domain measurement is in progress, it is capable of accumulation and display of frequency points within any timeframes. Frequency-hopping points can be observed directly. Pulse signals and transient signals can also be measured. 

Audio signal generation
Single and double tones are available for your choice. The max. output level reaches 7Vrms. 

Audio signal analysis
Audio filter is optional. The max. input level is up to 30Vrms. The tester supports measurements on frequency, level, distortion degree, SINAD and SNR, as well as audio waveform display. 

Simultaneous operation on multiple windows
Support simultaneous operation of 4 windows at most, each window can be enlarged individually. 

AV4945B/C Radio Communications Test Set is extensively employed due to the powerful functions and performances, which is used for R&D, repair, maintenance and testing of communication equipment.  

Name Specifications
RF single generation Freq. range 1MHz~1.05GHz(AV4945B,up to 100kHz),
1MHz~3GHz(AV4945C,up to 100kHz)
  Freq. resolution 1Hz
  Output level range GEN:-120dBm~+5dBm(max. modulation 0dBm)
T/R interface:-130dBm~-35dBm
  Level resolution 0.1dB
  Level accuracy ±1.5dB(≥-110dBm),±2.0dB(<-110dBm)
  Single sideband phase noise -93dBc/Hz@20kHz(≤1.05GHz),-90dBc/Hz@20kHz(>1.05GHz)
  Harmonic Better than -25dBc(>1MHz,≤0dBm)
  Non-harmonic Better than -35dBc(>1MHz,+5dBm output)
  Internal analog modulation source Sine, square wave, triangle, saw-tooth, dual-tone(analog pilot)
  Internal FM Max. frequency offset:150kHz
Accuracy:±5%(frequency offset 5kHz~150kHz)
Modulation rate:20Hz~20kHz
  Internal AM Modulation range:0~100%
Accuracy:±5%(relative value,depth 10%~90%)
Modulation rate:20Hz~20kHz
  Internal SSB Modulation options:USB、LSB
Modulation rate:300Hz~5kHz
  External FM/AM/SSB Modulation rate:20Hz~15kHz(FM,AM),300Hz~3kHz(SSB)
  Vector signal generation (option) Modulation type:2ASK, 2FSK, GMSK, BPSK, QPSK, 8PSK, 16QAM
Max. modulation bandwidth:10MHz
Max. symbol rate:5MHz
Digit source:PRBS, whole 0, whole 1, 0 and 1 alternation, external digital filter: RC, RRC, GAUSS
EVM:≤2%rms(symbol rate≤1MHz),≤3%rms(symbol rate>1MHz)
  Frequency-hopping signal generation(option) Max. frequency-hopping transient bandwidth:60MHz
Max. non-repetitive hopping graphic length:4000
Frequency agility time:<10μs
Max. hopping rate:100,000 times/sec
Hopping type:internal stepping repetition, external frequency control
Broadband power measurement Frequency range 400kHz~1.05GHz(AV4945B),400kHz~3GHz(AV4945C)
  Measurement range 0.1mW~100mW (ANT interface),100mW~150W(T/R interface,>40W,continuous input for a single time should not be longer than 1 min, interval between two consecutive input should not be shorter than 2 min.)
  Measurement accuracy 15%(≤120W,CW or frequency modulation)
Narrow band power measurement Frequency range 300kHz~1.05GHz(AV4945B, low frequency depends on small IF bandwidth)
300kHz~3GHz(AV4945C, low frequency depends on small IF bandwidth)
  Measurement range +51dBm~-40dBm(T/R interface, low frequency depends on small IF bandwidth)
+10dBm~-80dBm(ANT interface, low frequency depends on small IF bandwidth)
  Measurement accuracy ±2dB
  Receiving bandwidth 6.25, 8.33, 10, 12.5, 25, 30, 100, 300kHz
Frequency error meter Frequency range 300kHz~1.05GHz(AV4945B, low frequency depends on small IF bandwidth)
300kHz~3GHz(AV4945C, low frequency depends on small IF bandwidth)
  Accuracy Frequency standards±1Hz
=Audio signal generation Waveform Sine, square wave, triangle, saw-tooth
  Signal type Single-tone, dual-tone
  Frequency 20Hz~20kHz(sine),20Hz~4kHz(square wave, triangle, saw-tooth)
  Frequency resolution 0.1Hz
  Level range 1mV~7Vrms(10kΩ load)
  Level accuracy ±5%(10kΩ load≥10mVrms)
Audio signal analysis Input impedance 150Ω, 600Ω, high impedance
  Max. input level 30Vrms(high impedance)
  Audio filter Low-pass:300Hz, 5kHz, 15kHz, 20kHz
Band-pass:0.3~3.4kHz, 0.3~5kHz, 0.3~15kHz, 0.3~20kHz
  Frequency meter Frequency range:20Hz~20kHz
Input level:20mV~30Vrms
  Level meter Frequency range:20Hz~20kHz
Input level:1mV~30Vrms
Unit:V, dBV, dBm
Precision:±5%(High impedance, ≥10mVrms)
  SINAD meter Measurement range:3~60dB
Precision:±1.0dB(SINAD>3dB,≤40dB,5kHz low-pass)
Frequency range:300Hz~5kHz
Input level:0.1~30Vrms
  Distortion meter Measurement range:0~90%
Precision:<±0.5%(distortion degree<10%),<±1.0%
Frequency range:300Hz~5kHz
Input level:0.1~30Vrms
  SNR meter Measurement range:3~60dB
Frequency range:300Hz~5kHz
Input level:0.1~30Vrms
Sweep spectrum analyzer Frequency range 100kHz~1.05GHz(AV4945B),100kHz~3GHz(AV4945C)
  Sweep width 0Hz~whole frequency bands
  Level precision ±1.5dB
  Min. average noise level displayed Better than-125dBm(ANT interface),-75dBm(T/R interface)
  Resolution bandwidth 30Hz~3MHz(1-3 stepping)
Demodulation and analysis of analog modulation signals Frequency range 300kHz~1.05GHz (AV4945B, low frequency depends on small IF bandwidth)
300kHz~3GHz(AV4945C, low frequency depends on small IF bandwidth)
  Signal format FM, AM, SSB
  Demodulation bandwidth 6.25、8.33、10、12.5、25、30、100、300kHz
  Demodulation audio filter Low-pass:300Hz, 5kHz, 15kHz, 20kHz,
Band-pass:0.3~3.4kHz, 0.3~5kHz, 0.3~15kHz, 0.3~20kHz
  Frequency range of demodulation counter 20Hz~20kHz
  Demodulation counter resolution 0.1Hz
  FM Frequency offset range:0~150kHz
Precision:±5%(frequency offset range 5~150kHz,modulation rate 1kHz)
Modulation rate:20Hz~20kHz
  AM AM depth range:0~100%
Precision:±5%(relative value,modulation range 30%~90%,modulation rate 1kHz)
Modulation rate:20Hz~20kHz
  Sensitivity ≤-100dBm(10dB SINAD,ANT interface)
Demodulation and analysis of vector signals (option) Frequency range 300kHz~1.05GHz (AV4945B, low frequency depends on small IF bandwidth),
300kHz~3GHz (AV4945C, low frequency depends on small IF bandwidth)
  Signal format GMSK, BPSK, QPSK, 8PSK, 16QAM
  Demodulation bandwidth 10kHz~10MHz
  Max. symbol rate 5MHz
  Filter RC, RRC, GAUSS
Frequency-hopping signal analysis(option) Transient bandwidth 60MHz, 30MHz, 15MHz, 7.5MHz, 3.75MHz, 1.875MHz
  Capture storage depth 8Gb
  Analysis domain Time-frequency(modulation domain), time-amplitude, time-spectrum(waterfall chart), spectrum at random time
  Min. time resolution 10ns
Dual-channel oscilloscope Frequency range DC~4MHz
  Vertical scale 10mV~10V/mark(1, 2, 5 stepping)
  Horizontal scale 1us~1s/mark(1, 2, 5 stepping)
  Coupling type DC, AC
  Input impedance 1MΩ
Digital sequence generation and bit error rate measurement (option) Digit format PN3, PN5, PN9, PN11
  Baud rate 300bps~1Mbps (BPSK, GMSK, 2FSK, 2ASK)
  Bit error rate measurement range 0.1~0.000001
Internal time-base Frequency:10MHz;aging rate:1×10-7/year;temperature stability:±0.05ppm(0~50℃)
Working temperature 0℃~+50℃
Storage temperature -40℃~+70℃
Dimensions External dimensions(without handles and auxiliaries):W×H×D=426×222×180mm
Weight Not more than 12kg
Power Internal AC:220V±10%,frequency 50Hz±5%;external DC:24V±2V(16V is acceptable);
Built-in and rechargeable battery:≥11000mAh(option)
Consumption <100W
Cooling type Internal air cooling
Interface RF:GEN interface(TNC), T/R interface(type N), ANT interface(TNC)
BNC:audio input, audio output, oscilloscope input etc
Others:network port(support remote control), 26-core testing bus interface, USB-host interface etc

Main equipment:
AV4945B Radio Comprehensive Tester(300kHz~1.05GHz)
AV4945C Radio Comprehensive Tester(300kHz~3GHz)
Standards configuration
No. Name Remarks
1 User’s Manual(with Programming Manual) 1 pc
2 Tri-core 220VAC power cord 1 pc
3 N-BNC adapter 1 pc
4 N-SMA adapter 1 pc
5 TNC-SMA adapter 1 pc
Serial No. Name Remarks
AV4945-H01 Built-in lithium battery Capacity 11000mAh
AV4945-S01 Software for vector signal generation and bit error rate measurement See details in “Technical specifications”
AV4945-S02 Software for vector signal demodulation and analysis See details in “Technical specifications”
AV4945-S03 Software for frequency-hopping signal generation See details in “Technical specifications”
AV4945-S04 Software for frequency-hopping signal analysis See details in “Technical specifications”
AV4945-S05 Software for dual-channel oscilloscope See details in “Technical specifications”