YC-TI-CT-0004 | 4945 Series Wireless Communication Comprehensive Tester
Price on request
Request a quoteProduct overview
The 4945 series integrates RF generation, analog demodulation, wideband/narrowband power, audio analysis and guided automatic testing for radio equipment production, commissioning and maintenance. 4945B and 4945C provide different frequency configurations; vector, hopping, BER and oscilloscope functions are selectable options.
Models and frequency ranges
| Manufacturer model | Construction | RF source | Swept spectrum analysis | Wideband power | Narrowband power / frequency error / demodulation |
|---|---|---|---|---|---|
| 4945B | Portable | 1 MHz-1.05 GHz (usable down to 100 kHz) | 100 kHz-1.05 GHz | 400 kHz-1.05 GHz | 300 kHz-1.05 GHz (low-frequency operation depends on narrow IF bandwidth) |
| 4945C | Portable | 1 MHz-3 GHz (usable down to 100 kHz) | 100 kHz-3 GHz | 400 kHz-3 GHz | 300 kHz-3 GHz (low-frequency operation depends on narrow IF bandwidth) |
General specifications and interfaces
| Parameter | Specification and conditions |
|---|---|
| Display and operation | 10.4-inch resistive touchscreen; Chinese/English menus and selectable interface colors; up to 4 simultaneous function windows |
| Internal timebase frequency | 10 MHz |
| Timebase aging | 1×10^-7/year |
| Timebase temperature stability | ±0.05 ppm (0-50°C) |
| Operating temperature | 0 to +50°C |
| Storage temperature | -40 to +70°C |
| Dimensions (W×H×D) | 426×222×180 mm (excluding handle and accessories) |
| Weight | ≤12 kg |
| External AC supply | 220 V±10%; 50 Hz±5% |
| External DC supply | 24 V±2 V (accepts down to 16 V) |
| Internal battery | Rechargeable in the instrument; capacity ≥11000 mAh; option 4945-H01 |
| Power consumption | <80 W |
| Cooling | Internal forced-air cooling |
| GEN port | TNC |
| T/R port | N-type |
| ANT port | TNC |
| Audio and oscilloscope interfaces | BNC: audio input, audio output, oscilloscope input and related interfaces; oscilloscope functionality is optional |
| Control and expansion interfaces | LAN for remote control, 26-pin test bus, USB-host and related interfaces |
RF signal generation
| Parameter | Specification and conditions |
|---|---|
| Frequency resolution | 1 Hz |
| GEN output level | -120 to +5 dBm; maximum 0 dBm with modulation |
| T/R output level | -130 to -35 dBm |
| Level resolution | 0.1 dB |
| Level accuracy | ±1.5 dB (≥-110 dBm); ±2.0 dB (<-110 dBm) |
| SSB phase noise | -93 dBc/Hz@20 kHz (≤1.05 GHz); -90 dBc/Hz@20 kHz (>1.05 GHz) |
| Harmonics | Better than -25 dBc (>1 MHz, ≤0 dBm) |
| Non-harmonic spurious | Better than -35 dBc (>1 MHz, +5 dBm output) |
| Internal analog modulation source | Sine, square, triangle, sawtooth and dual tone (simulated pilot tone) |
| Internal FM | Maximum deviation 150 kHz; accuracy ±5% (deviation 5-150 kHz); modulation rate 20 Hz-20 kHz |
| Internal AM | Depth 0-100%; accuracy ±5% (relative, depth 10-90%); modulation rate 20 Hz-20 kHz |
| Internal SSB | USB or LSB; modulation rate 300 Hz-5 kHz |
| External FM/AM/SSB | FM/AM rate 20 Hz-15 kHz; SSB rate 300 Hz-3 kHz |
Vector signal generation (option 4945-S01)
| Parameter | Specification and conditions |
|---|---|
| Modulation formats | 2ASK, 2FSK, MSK, BPSK, QPSK, 8PSK, 16QAM |
| Maximum modulation bandwidth | 10 MHz |
| Maximum symbol rate | 5 MHz |
| Data sources | PRBS, all 0, all 1, alternating 01 and external digital data |
| Filters | RC, RRC, GAUSS |
| EVM | ≤2% rms (symbol rate ≤1 MHz); ≤3% rms (symbol rate >1 MHz) |
Frequency-hopping generation (option 4945-S03)
| Parameter | Specification and conditions |
|---|---|
| Maximum instantaneous bandwidth | 60 MHz |
| Maximum non-repeating hop pattern length | 4000 |
| Frequency switching time | <10 μs |
| Maximum hop rate | 100000 hops/s |
| Hop modes | Internal repeated stepping and external frequency control |
Wideband power measurements
| Parameter | Specification and conditions |
|---|---|
| ANT measurement range | 0.1-100 mW |
| T/R measurement range | 100 mW-150 W |
| High-power input timing | At >40 W, a single continuous input lasts ≤1 minute; the interval between successive inputs is ≥2 minutes |
| Measurement accuracy | 15% (≤120 W, CW or frequency modulation) |
Narrowband power and frequency error
| Parameter | Specification and conditions |
|---|---|
| T/R narrowband power range | -40 to +51 dBm (low-power operation depends on narrow IF bandwidth) |
| ANT narrowband power range | -80 to +10 dBm (low-power operation depends on narrow IF bandwidth) |
| Power measurement accuracy | ±2 dB |
| Receiver bandwidths | 6.25, 8.33, 10, 12.5, 25, 30, 100, 300 kHz |
| Frequency error meter accuracy | Frequency standard ±1 Hz |
Swept spectrum analysis
| Parameter | Specification and conditions |
|---|---|
| Span | 0 Hz to the full frequency range of the selected 4945B or 4945C |
| Level accuracy | ±1.5 dB |
| Lowest displayed average noise level | Better than -125 dBm (ANT port); -75 dBm (T/R port) |
| Resolution bandwidth | 30 Hz-3 MHz (1-3 stepping) |
Audio signal generation
| Parameter | Specification and conditions |
|---|---|
| Waveforms | Sine, square, triangle and sawtooth |
| Signal types | Single or dual tone; independently adjustable dual-tone frequencies and amplitudes, with adjustable relative phase |
| Frequency ranges | 20 Hz-20 kHz (sine); 20 Hz-4 kHz (square, triangle, sawtooth) |
| Frequency resolution | 0.1 Hz |
| Level range | 1 mV-7 Vrms (10 kΩ load) |
| Level accuracy | ±5% (10 kΩ load, ≥10 mVrms) |
Audio signal analysis
| Parameter | Specification and conditions |
|---|---|
| Input impedance | 150 Ω, 600 Ω, high impedance |
| Maximum input level | 30 Vrms (high impedance) |
| Audio filters | Low-pass: 300 Hz, 5 kHz, 15 kHz, 20 kHz; band-pass: 0.3-3.4 kHz, 0.3-5 kHz, 0.3-15 kHz, 0.3-20 kHz |
| Frequency meter | 20 Hz-20 kHz; input 20 mV-30 Vrms; resolution 0.1 Hz; accuracy 1 Hz |
| Level meter | 20 Hz-20 kHz; input 1 mV-30 Vrms; units V, dBV, dBm; accuracy ±5% (high impedance, ≥10 mVrms) |
| SINAD meter | Range 3-60 dB; accuracy ±1.0 dB (SINAD >3 dB, ≤40 dB, 5 kHz low-pass); frequency 300 Hz-5 kHz; input 0.1-30 Vrms |
| Distortion meter | Range 0-90%; accuracy <±0.5% (distortion <10%), <±1.0%; frequency 300 Hz-5 kHz; input 0.1-30 Vrms |
| SNR meter | Range 3-60 dB; accuracy ±1.0 dB (SNR >20 dB, ≤40 dB); frequency 300 Hz-5 kHz; input 0.1-30 Vrms |
Analog demodulation and analysis
| Parameter | Specification and conditions |
|---|---|
| Formats | FM, AM, SSB |
| Demodulation bandwidths | 6.25, 8.33, 10, 12.5, 25, 30, 100, 300 kHz |
| Demodulated audio filters | Low-pass: 300 Hz, 5 kHz, 15 kHz, 20 kHz; band-pass: 0.3-3.4 kHz, 0.3-5 kHz, 0.3-15 kHz, 0.3-20 kHz |
| Demodulation counter frequency | 20 Hz-20 kHz |
| Demodulation counter resolution | 0.1 Hz |
| FM | Deviation 0-150 kHz; accuracy ±5% (deviation 5-150 kHz, modulation rate 1 kHz); modulation rate 20 Hz-20 kHz |
| AM | Depth 0-100%; accuracy ±5% (relative, depth 30-90%, modulation rate 1 kHz); modulation rate 20 Hz-20 kHz |
| Sensitivity | ≤-100 dBm (10 dB SINAD, ANT port) |
Vector demodulation and analysis (option 4945-S02)
| Parameter | Specification and conditions |
|---|---|
| Formats | 2ASK, 2FSK, MSK, BPSK, QPSK, 8PSK, 16QAM |
| Demodulation bandwidth | 10 kHz-10 MHz |
| Maximum symbol rate | 5 MHz |
| Filters | RC, RRC, GAUSS |
Frequency-hopping analysis (option 4945-S04)
| Parameter | Specification and conditions |
|---|---|
| Instantaneous bandwidths | 60, 30, 15, 7.5, 3.75, 1.875 MHz |
| Capture memory depth | 8 Gb |
| Analysis domains | Time-frequency (modulation domain), time-amplitude, time-spectrum (waterfall), spectrum at any captured time |
| Minimum time resolution | 10 ns |
| Single-capture duration | 1.3 s (60 MHz bandwidth) |
Dual-channel oscilloscope (option 4945-S05)
| Parameter | Specification and conditions |
|---|---|
| Frequency range | DC-4 MHz |
| Vertical scale | 10 mV-10 V/div (1, 2, 5 stepping) |
| Horizontal scale | 1 μs-1 s/div (1, 2, 5 stepping) |
| Coupling | DC, AC |
| Input impedance | 1 MΩ |
Digital sequence generation and BER measurements (option 4945-S01)
| Parameter | Specification and conditions |
|---|---|
| Data formats | PN3, PN5, PN9, PN11 |
| Bit rate | 300 bps-1 Mbps (BPSK, MSK, 2FSK, 2ASK) |
| BER measurement range | 0.000001-0.1 |
Applications and operating functions
| Parameter | Specification and conditions |
|---|---|
| Receiver testing | Generate FM, AM and SSB signals while measuring demodulated audio frequency, voltage, THD, SINAD and SNR |
| Transmitter testing | Simultaneous power, frequency error, modulation and demodulated audio measurements; single/dual-tone audio generation |
| Guided automatic tests | Edit equipment models, parameters and pass limits; control transmit/receive through PTT; pause for instrument settings or cable changes and then resume |
| Result management | Store, view, compare and remotely retrieve results, with pass/fail indications |
| Demodulated speech | Built-in speaker for real-time analog demodulated speech |
| Hopping applications (optional) | Capture, store and analyze with three-dimensional spectrum, time-frequency and time-amplitude displays; pulse and transient signal analysis |
Included accessories
| Accessory | Quantity | Description |
|---|---|---|
| Power cord | 1 | Power accessory |
| User manual (including programming manual) | 1 | Operation and programming documentation |
| N-BNC adapter | 1 | Interface accessory |
| N-SMA adapter | 1 | Interface accessory |
| TNC-SMA adapter | 2 | Interface accessory |
| Factory product quality document | 1 | Supplied product quality documentation |
Configuration and operating notes
- 4945B and 4945C have different RF-source, spectrum, wideband-power and demodulation frequency ranges. Select by function and model. Usable down to 100 kHz does not mean every measurement, accuracy specification or port operates from 100 kHz.
- 150 W is the stated T/R wideband power measurement limit, not a continuous 150 W input rating. At >40 W, each continuous input lasts ≤1 minute and successive inputs are separated by ≥2 minutes; 15% accuracy is specified only at ≤120 W with CW or frequency modulation.
- ANT and T/R have different power ranges, spectrum noise levels and connectors; do not interchange their input limits. Narrowband low-frequency and low-power capability depends on narrow IF bandwidth and the selected settings.
- Digital vector generation/BER testing, digital demodulation, hopping generation/analysis, the dual-channel oscilloscope and battery are optional. The ordered hardware and software determine the functions included.
- 7 Vrms output is specified with a 10 kΩ load; 30 Vrms input is the high-impedance limit. Audio accuracy also requires the stated frequencies, levels and filters. Vrms is RMS voltage and must not be confused with peak voltage.
- The photo represents a 4945C configuration. 4945B and selected options are supplied according to the order. Included quantities are listed in the table; metrology, warranty extension and additional accessories are separate selections. The factory quality document is not an ISO or third-party calibration certificate.
- Provide the device, frequencies, modulation formats, power, interfaces, options and quantity. Delivery, calibration services and warranty terms are defined in the formal quotation.