BK Precision 4085 40 MHz Programmable DDS Function Generator. New in Box.

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BK Precision 4085 40 MHz Programmable DDS Function Generator. (Discontinued)

Discontinued

Product Code: 4085

Description

Application Notes

Datasheet PDF Format

Frequency Characteristics
		Frequency Range
						Sine			1µHz ~ 40MHz
						Square			1µHz ~ 40MHz
						All Other Waveforms			1µHz ~ 100kHz
		Frequency Stability							±1 × 10^-6 (22°C ± 5°C)
		Resolution							1µHz
		Frequency Accuracy							≤ ±5 × 10^-6 (22°C ± 5°C)
		Data entry Units							s, ms, Hz, kHz, MHz
Waveform Characteristics
	Main waveforms (Sine, square)
					Amplitude resolution				12 bits
					Sample Rate				200MSa/s
					Sine
							Harmonic Distortion of Sine Wave*		≤ -50dBc (frequency ≤ 5MHz) ≤ -45dBc (frequency ≤ 10MHz) ≤ -40dBc (frequency ≤ 20MHz) ≤ -35dBc (frequency ≤ 40MHz)
							Total Harmonic Distortion*		0.1% (20Hz ~ 100kHz)
					Square
							Rise and fall time*		≤ 15ns
	* = Note: Test conditions for harmonic distortion, sine distortion, rise/fall time Output Amplitude 2Vp-p, Environmental temperature: 25°C ± 5°C
	Other built-in waveforms:
					27 build-in standard and complex waveforms.				Sine, Square, Triangle, Positive Ramp, Falling Ramp, Noise, Pulse, Positive Pulse, Negative Pulse, Positive DC, Negative DC, Stair wave, Coded Pulse, Full wave rectified, Half-wave rectified, Sine transverse cut, Sine vertical cut, Sine phase modulation, Logarithmic, Exponential, Half-round, sin x/x, Square root, Tangent, Cardiac, Earthquake, Combination
					Waveform Length				4096 dots
					Amplitude Resolution				10 bits
					Pulse Wave
							Duty Cycle		0.1% ~ 99.9% (below 10kHz), 1% ~ 99% (10kHz ~ 100kHz)
							Rise/Fall Time		≤ 100ns (Duty Cycle 20%)
					DC signal characteristics
							DC range		≤ 10mV - 10V (high impedance)
							DC Accuracy		≤ ±5% of setting +10mV (high impedance)
Amplitude Characteristics
	Amplitude Range								2mV ~ 20Vpp (open circuit), 1mV ~ 10Vpp (50Ω)
	Resolution								2µVpp (open circuit), 1µVpp (50Ω)
	Accuracy								±1% + 0.2mV (sine wave relative to 1kHz)
	Stability								±0.5% / 3 hours
	Flatness
					For amplitude ≤ 2Vpp				±3% (frequency ≤ 5MHz), ±10% (5MHz < frequency ≤ 40MHz)
					For amplitude > 2Vpp				±5% (frequency ≤ 5MHz), ±10% (5MHz < frequency ≤ 20MHz) ±20% (frequency > 20MHz)
	Output Impedance								50Ω
	Output Units								Vpp, mVpp, Vrms, mVrms, dBm
DC Offset Characteristics
	Offset Range (open circuit)								±10Vpk ac + dc (Offset ≤ 2 × peak-to-peak amplitude)
	Offset Resolution								2µV (open circuit), 1µV (50Ω)
	Offset Error								±5% of setting + 10mV (Ampl. ≤ 2Vpp into open circuit) ±5% of setting + 20mV (Ampl. > 2Vpp into open circuit)
AM Characteristics
	Carrier Waveforms								sine or square
	Modulation Source								internal or external
	Internal Modulating Waveform								sine, square, triangle, rising/falling ramp
	Frequency of modulating signal								100µHz ~ 20kHz
	Distortion								≤ 2%
	Modulation Depth								1% ~ 120% 1% ~ 80% (frequency > 40MHz, Ampl > 2Vpp into open circuit)
	Modulation Error								±5% + 0.2% (100µHz < frequency ≤ 10kHz) ±10% + 2% (10kHz < frequency ≤ 20kHz)
	Max. Amplitude of ext. input signal								3Vp-p (-1.5V ~ +1.5V)
FM Characteristics
	Carrier Waveforms								sine or square
	Modulation Source								internal or external
	Internal Modulating Waveform								sine, square, triangle, rising/falling ramp
	Frequency of modulating signal								100µHz ~ 10kHz
	Deviation								Max. 50% of carrier frequency for internal FM Max. 100kHz (carrier frequency ≥ 5MHz) for external FM, with input signal voltage 3Vp-p (-1.5V ~ +1.5V)
FSK Characteristics
	Carrier Waveform								sine or square
	Control Mode								internal or external trigger (external: TTL level, low level F1, high level F2)
	FSK Rate								0.1ms ~ 800s
PSK Characteristics
	Carrier Waveform								sine or square
	PSK								Phase 1 (P1) and Phase 2 (P2), range: 0.0 ~ 360.0°
	Resolution								0.1°
	PSK rate								0.1ms ~ 800s
	Control Mode								internal or external trigger (external: TTL level, low level P1, high level P2)
Burst Characteristics
	Carrier Waveform								sine or square
	Burst Counts								1 ~ 10000 cycles
	Time interval between bursts								0.1ms ~ 800s
	Control Mode								internal, single or external gated trigger
Frequency Sweep Characteristics
	Carrier Waveform								sine or square
	Sweep Time								1ms ~ 800s (linear), 100ms ~ 800s (log)
	Sweep Mode								Linear or Logarithmic
	Start/Stop Frequency								same as frequency range of sine and square
	External trigger signal frequency								DC ~ 1kHz (linear) DC ~ 10Hz (log)
	Control Mode								Internal or external trigger
Inputs/Outputs
		Main OUTput
				Impedance				50Ω
				Protection				Short circuit and overload protected
				Amplitude				5Vp-p ± 5%
				Output Impedance				600Ω
		Output MOD OUT
			Frequency					100Hz ~ 20kHz
			Waveform					sine, square, triangle, rising/falling ramp
			Amplitude					5Vp-p ± 5%
			Output Impedance					600Ω
		Modulation IN						3 Vpp = 100% Modulation
		External Input Trig / FSK / Burst						Level - TTL
State Storage Characteristics
		Storage Parameters						frequency, amplitude, waveform, DC offset values, modulation parameters
		Storage Capacity						10 user configurable stored states
Universal Counter
Frequency Range
		Frequency Measurement						1Hz ~ 100MHz
		Totalize mode						50MHz max
Input Characteristics
		Sensitivity
			Input attenuator disabled					50mVrms (f: 10Hz ~ 50MHz), 100mVrms (f: 1Hz ~ 100MHz)
			Input attenuator enabled					0.5Vrms (f: 10Hz ~ 50MHz), 1Vrms (f: 1Hz ~ 100MHz)
		Max. Input Voltage Allowed						100Vp-p (f ≤ 100kHz), 20Vp-p (1Hz ~ 100MHz)
		Input Impedance						R > 500kΩ, C < 30pF
		Coupling						AC
		Waveform						sine or square
		Low Pass Filter						cut off frequency about 100kHz (with internal attenuation: ≤ -3dB) with external attenuation: ≥ -30 dB (f > 1MHz)
		Gate Time Setting						10ms ~ 10s continuously adjustable
		Display Bits						8 (for gate Time > 5s)
		Totalize Capacity						≤ 4.29 × 10⁹
		Control Mode						manual or external gate control
		Accuracy						time base error ± trigger error (when signal SNR > 40dB, trigger error ≤ 0.3)
		Time base
			Frequency					10MHz
			Stability					±1 × 10^-6 (22°C ± 5°C)
General
Power Supply								198 ~ 242V or 99 ~ 121V, Frequency: 47 ~ 63Hz
Power Consumption								< 35VA
Operating Temperature								0° to +40 °C
Operating Humidity								80% R.H
Storage Temperature								-40°C to 70°C
Dimensions (W × H × D)								10” x 3.93” x 14.56” (255 mm × 100 mm × 370 mm)
Weight								6.6 lbs, (3 kg)
Remote Interface								RS232
Safety designed to								EN61010
EMC tested to								EN55022, EN55024, EN61326, EN60100

Features

Model 4085 is a versatile, laboratory grade synthesized function generator. Direct digital synthesis (DDS) techniques are used to create stable, accurate output signals for all 27 built-in standard and complex (arbitrary) waveforms. The generator produces high purity, low distortion sine waves and provides a full suite of analog modulation capabilities including AM, FM, FSK, PSK, pulse modulation, burst mode and linear/logarithmic sweep combined with multiple trigger modes. The 4085’s versatility and capabilities make it an ideal tool for many general-purpose test and bench applications or for use in Training and Education.

Frequency range of 1µHz to 40MHz for sine and square
Clean and stable output of very small signals down to the 1mV to 10mV range (50 ohm)
Support of internal and external modulation sources as well as internal, external and gated trigger sources
Convenient data input via numeric keypad or knob.
Adjust modulation parameters precisely and over a wide range
Fully programmable via the standard RS232 interface using SCPI compatible commands.
100 MHz Universal Counter with frequency measurement and totalize function

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