# B&K Precision 4047B 20 MHz Dual Channel Function / Arbitrary Generator # B&K Precision 4047B 20 MHz Dual Channel Function / Arbitrary Generator ## Key Features At A Glance - Dual-channel operation with each channel providing rated 10 Vpp amplitude across the entire frequency range - Sine and square waveforms to 20 MHz; triangle to 2 MHz; pulse to 20 MHz - True point-by-point 14-bit, 125 MSa/s, 16-kpt arbitrary waveform generator architecture - AM, FM, PM, FSK, and PWM modulation with internal and external sources - Linear and logarithmic sweep, gate and burst mode, plus built-in 50 Hz to 50 MHz counter - Independent output and DC offset amplifiers allow small-amplitude signals with large DC offsets up to ±4.99 V - Low-jitter square wave output (<50 ps rms cycle-to-cycle, typical) for clock simulation and serial bus validation - USB interface with SCPI-compliant command set and WaveXpress waveform editing software compatibility The BK Precision 4047B is a 20 MHz dual-channel function and arbitrary waveform generator that produces stable and precise sine, square, triangle, pulse, and arbitrary waveforms. CH1 and CH2 outputs are fully independent with individual on/off buttons, and both channels deliver the rated 10 Vpp amplitude into 50 ohms (up to 20 Vpp into open circuit) across the full frequency range. The instrument combines a DDS engine for standard sine and triangle waveforms with a true point-by-point arbitrary waveform generator, giving the user both high frequency resolution and improved signal integrity for custom waveforms. The 4047B is suited to a wide range of applications including electronic design, sensor simulation, functional test, and serial data bus validation. Linear and logarithmic sweep capability, AM/FM/PM/FSK/PWM modulation, and a continuously variable DC offset let the user inject signals directly into circuits at the correct bias level. Separate output amplitude and DC offset amplifiers allow a large DC offset (for example, ±4.99 V) to be combined with a small amplitude output signal (such as 10 mV) — a configuration useful when stimulating circuits that require precise bias conditions alongside small AC perturbations. ## Accessories Supplied - Power cord - USB (type A to B) interface cable - Certificate of calibration ## Product Core & Specifications Specifications 4047B Channels 2 **Frequency Characteristics** Sine 0.01 Hz - 20 MHz Square 0.01 Hz - 20 MHz Triangle 0.01 Hz - 2 MHz Pulse 0.01 Hz - 20 MHz Resolution up to 8 digits Accuracy 0.001% (10 ppm); at < 500 Hz: 0.001% + 0.006 Hz **Output Characteristics** Amplitude Range 10 mVpp to 10 Vpp (into 50 Ω); 20 mVpp to 20 Vpp (open circuit) Amplitude Resolution 3 digits (1,000 counts) Amplitude Accuracy ± 2% ± 20 mV of programmed output from 1.01 V - 10 V Flatness ± 0.5 dB to 1 MHz; ± 1 dB to 20 MHz Offset Range \-4.99 V to 4.99 V (into 50 Ω) Offset Resolution 10 mV, 3 digits Offset Accuracy ± 2% ± 10 mV (into 50 Ω) Output Impedance 50 Ω ± 2% Output Protection Protected against short circuit or accidental voltage practically available in electronic laboratories, applied to the main output connector **Waveform Characteristics** Harmonic Distortion (3 Vp-p into 50 Ω) 0 - 1 MHz, < -60 dBc; 1 MHz - 5 MHz, <-50 dBc; 5 MHz - 12 MHz, <-45 dBc; 12 MHz - 20 MHz, < 50 dBc Rise/Fall Time (square, pulse) ≤ 20 ns (10% to 90% at full amplitude into 50 Ω) Variable Duty Cycle/Symmetry Square: 20% - 80% to 2 MHz; Triangle: 1% - 99% in 1% steps, up to 200 kHz Symmetry Accuracy at 50% ± 1% Pulse Width (period 100 s - 50 ns) 10 ns to <(Period - 10 ns), 10 ns resolution Variable Edge Time 100 ns to Width/0.625 (50 % duty cycle); 10 ns resolution Jitter (square, pulse) < 50 ps rms (cycle-to-cycle, typical) **Arbitrary Waveform Characteristics** Sampling Rate 8 ns to 100 s Vertical Resolution 14 bits Accuracy 0.001% Resolution 4 digits Waveform Length 2 to 16,382 points Jitter < 50 ps rms (cycle-to-cycle, typical) **Operating Modes** Continuous Output continuous at programmed parameters Triggered Output quiescent until triggered by an internal or external trigger, at which time one waveform cycle is generated to programmed parameters. Frequency of waveform cycle is limited to 1 MHz. Gate Same as triggered mode, except waveform is executed for the duration of the gate signal. The last cycle started is completed. Burst 2-65535 cycles Trigger Source Trigger source may be internal, external, or manual. Internal trigger rate 0.1 Hz - 1 MHz (1 us - 10 s) **Modulation Characteristics** AM - Carrier Sine, Square, or Triangle AM - Source Internal, External AM - Internal Modulation 0.1 Hz - 20 kHz AM - Depth 0% to 100% FM - Carrier Sine, Square, or Triangle FM - Source Internal, External FM - Internal Modulation 0.1 Hz - 20 kHz FM - Deviation 1 µHz to max frequency/2 FSK - Carrier Sine, Square, or Triangle FSK - Source Internal, External FSK - Rate ≤ 100 kHz PM - Carrier Sine, Square, or Triangle PM - Source Internal, External PM - Internal Modulation 0.01 Hz - 20 kHz PM - Deviation 0 - 360 °, 0.1 ° resolution PWM - Source Internal, External PWM - Width 1% to 99% PWM - Internal Modulation 0.01 Hz - 100 kHz **Sweep Characteristics** Sweep Shape Linear or Logarithmic, up or down Sweep Time 10 ms to 100 s **Input and Output** Trigger IN TTL compatible; Maximum rate 1 MHz; Minimum width > 50 ns; Input impedance 1 kΩ Sync OUT TTL pulse at programmed frequency; 50 Ω source impedance Modulation IN 5 Vp-p for 100% modulation; 10 kΩ input impedance; DC to > 20 kHz minimum bandwidth **Counter Characteristics** Range 50 Hz to 50 MHz Resolution Auto ranging, up to 8 digits Accuracy ± 0.02% ± 2 digits Sensitivity 25 mVrms typical **General** Memory Storage 20 instrument settings Arbitrary Memory 16,382 points in flash memory Power Requirements 100 V - 240 V AC ± 10%, 47-63 Hz Max. Power Consumption < 30 VA Operating Temperature 32 °F to 122 °F (0 °C to 50 °C) Storage Temperature 14 °F to 158 °F (-10 °C to 70 °C) Humidity 95% R.H. 0 °C to 30 °C Dimensions (W x H x D) 8.39” x 3.46” x 8.27” (213 x 88 x 210 mm) Weight 5.5 lbs (2.5 kg) Safety and EMC Standards EN55011 for radiated and conducted emissions; EN55082, EN61010, CE approved Warranty Three-Year Warranty **Important:** Maximum amplitude is specified into a 50 Ω load (10 Vpp); open-circuit output reaches 20 Vpp. Verify load impedance when setting amplitude to ensure the signal level delivered to the DUT matches the intended programmed value.**Important:** All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 °C ± 5 °C.Recommended pairing: use with WaveXpress waveform editing software to generate, edit, and upload custom arbitrary waveforms via the USB interface to the 14-bit, 125 MSa/s, 16,382-point arbitrary engine. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 917.0 USD - **Vendor:** B&K Precision - **Type:** Arbitrary Generator - **Tags:** Arbitrary Waveform, BK Precision, Manufacturers, product_manual_group_1, Product_new, Signal Generators ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 917.00 USD | In stock | ## Images - B&K Precision 4047B 20 MHz Dual Channel Function / Arbitrary Generator --- > Source: [ValueTronics](https://valuetronics.com/products/4047b-b-k-precision-arbitrary-waveform-generator-new) > Updated: 2026-05-30