The Stanford Research Systems (SRS) DS345 Function and Arbitrary Waveform Generator is a full-featured, 30 MHz instrument that uses an innovative Direct Digital Synthesis (DDS) architecture. It generates many standard waveforms with excellent frequency resolution (1 µHz), including: sine waves and square waves at frequencies up to 30.2 MHz, and triangle and ramp waveforms up to 100 kHz. In addition to the standard waveforms, the unit also provides a wideband (10 MHz) white noise source and has versatile modulation capabilities including AM, FM, Burst, PM and frequency sweeps. It also generates arbitrary waveforms with a fast 40 Msample/s update rate and 12-bit vertical resolution. A 10 MHz rear-panel input allows the DS345 to be synchronized to an external timebase. A 10 MHz rear-panel output allows multiple DS345’s to be phase locked.
Features and Specifications of:
●1 µHz to 30.2 MHz frequency range
●1 µHz frequency resolution
●Sine, square, ramp, triangle and noise
●Phase continuous frequency sweeps
●AM, FM, burst and phase modulation
●16,300 point arbitrary waveforms
●10 MHz reference input
●Optional RS-232 and GPIB interfaces
●Frequency Range:
■Sine:
■Max Frequency: 30.2 MHz
■Resolution: 1 µHz
■Square:
■Max Frequency: 30.2 MHz
■Resolution: 1 µHz
■Ramp:
■Max Frequency: 100 kHz
■Resolution: 1 µHz
■Triangle:
■Max Frequency: 100 kHz
■Resolution: 1 µHz
■Noise:
■Max Frequency: 10 MHz
■Resolution: (Gaussian weighting)
■Arbitrary:
■Max Frequency: 10 MHz
■Resolution: 40 MHz/n (sample rate)
●Output:
■Source Impedance: 50 O
■Grounding: Output may float up to ±40 V (AC + DC) relative to earth ground
●Amplitude:
■Range: 0.01 to 10 Vpp (50 O), 20 Vpp (Hi-Z)
■Resolution: 3 digits (DC offset = 0 V)
■Sine Wave Accuracy (0 V DC offset):
■5 to 10 Vpp:
■±0.2 dB (1 µHz to 20 MHz)
■±0.3 dB (20 MHz to 30.2 MHz)
■0.01 to 5 Vpp:
■±0.4 dB(1 µHz to 20 MHz)
■±0.5 dB (20 MHz to 30.2 MHz)
■Square Wave Accuracy:
■5 to 10 Vpp:
■±3 % (1 µHz to 100 kHz)
■±6 % (100 kHz to 20 MHz)
■±15 % (20 MHz to 30.2 MHz)
■0.01 to 5 Vpp:
■±5 % (1 µHz to 100 kHz)
■±8 % (100 kHz to 20 MHz)
■±18 % (20 MHz to 30.2 MHz)
■Triangle, Ramp, Arbitrary Accuracy:
■±3 % (>5 Vpp)
■±5 % (
●DC Offset:
■Range: ±5 V (limited such that |VAC peak| + |VDC| < 5 V)
■Resolution: 3 digits (VAC = 0)
■Accuracy:
■1.5 % of setting + 0.2 mV (DC only)
■±0.8 mV to ±80 mV, depending on AC and DC settings
●Sine Wave:
■Spurious Components:
■Phase Noise:
■Sub-Harmonic:
■Harmonic Distortion:
■
■Level:
■Level:
■Level:
■Level:
●Square Wave:
■Rise/Fall Time:
■Asymmetry:
■Overshoot:
●Ramps, Triangle and Arbitrary Waveforms:
■Rise/Fall Time: 45 ns (10 MHz Bessel filter)
■Linearity: ±0.5 % of full-scale output
■Settling Time:
●Arbitrary Waveforms:
■Sample Rate: 40 MHz/N, N = 1 to 234-1
■Memory Length: 8 to 16,300 points
■Resolution: 12 bits (0.025 % of full scale)
●Phase:
■Range: ±7199.999° with respect to arbitrary starting phase
■Resolution: 0.001°
●Amplitude Modulation:
■Source: Internal (sine, square, triangle or ramp) or External
■Depth: 0 to 100 % AM or DSBSC
■Rate: 0.001 Hz to 10 kHz internal, 15 kHz max external
■Distortion:
■DSB Carrier:
■External Input: ±5 V for 100 % modulation, 100 kO impedance, 15 kHz bandwidth
●Frequency Modulation:
■Source: Internal (sine, square, triangle, ramp or arbitrary)
■Rate: 0.001 Hz to 10 kHz
■Span: 1 mHz to 30.2 MHz (100 kHz for triangle, ramp)
●Phase Modulation:
■Source: Internal (sine, square, triangle, ramp)
■Rate: 0.001 Hz to 10 kHz
■Span: ±7199.999°
●Frequency Sweep:
■Type: Linear or log, phase continuous
■Waveform: Up, down, up-down, single sweep
■Time: 0.001 s to 1000 s
■Span: 1 mHz to 30.2 MHz (to 100 kHz for triangle, ramp)
■Markers: Two markers may be set at any sweep point (TTL output)
■Sweep Output: 0 to 10 V linear ramp signal, synchronized to sweep
●Burst Modulation:
■Waveform: Any waveform except noise may be burst modulated
■Frequency: Sine, square to 1 MHz
Triangle, ramp to 100 kHz
Arbitrary to 40 MHz sample rate
■Count: 1 to 30,000 cycles/burst (1 µs to 500 s burst time limits)
●Trigger Generator:
■Source: Single, Internal, External, Line
■Rate (Internal): 0.001 Hz to 10 kHz (2-digit resolution)
■External Trigger: Positive or negative edge, TTL
■Output: TTL level
●Standard Timebase:
■Accuracy: ±5 ppm (20 °C to 30 °C)
■Aging: 5 ppm/year
■Input: 10 MHz/N ± 2 ppm (N = 1 to 8) 1 Vpp minimum input level
■Output: 10 MHz, >1 Vpp sine into 50 O
●General:
■Interfaces: Optional RS-232 (300 to 19.2 kbaud, DCE) and GPIB with DOS based arbitrary waveform software (AWC). All instrument functions are controllable over the interfaces.
■Non-Volatile Memory: Nine sets of instrument settings can be saved and recalled
■Power: 50 W, 100/120/220/240 VAC, 50/60 Hz
