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选用二手测量仪器的优势是：
1、与新购仪器几个月的供货期相比，购买二手仪器的供货期要短的多。在时间就是市场的今天，优势无疑是最为明显的。
2、二手仪器的价格便宜，基本为新购仪器价格的20%～50%。在电子技术迅速发展的今天，仪器的更新也在加快，投资越少则风险越小。
3、为了让您放心地使用我们提供的二手仪器，我们销售的二手仪器可以做到：
1、保修半年至一年不等。
2、可以根据您的要求，将仪器送至国家级计量测试单位进行校准。
现货斯坦福DS345 任意波形信号发生器 30MHz
Function Generator
DS345 — Function & arbitrary waveform generator
DS345 任意波形信号发生器
Specifications |
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Frequency Range |
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Max. Frequency |
Resolution |
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Sine |
30.2 MHz |
1 ?Hz |
Square |
30.2 MHz |
1 ?Hz |
Ramp |
100 kHz |
1 ?Hz |
Triangle |
100 kHz |
1 ?Hz |
Noise |
10 MHz |
(Gaussian weighting) |
Arbitrary |
10 MHz |
40 MHz/n (sample rate) |
Output |
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Source impedance |
50 Ω |
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Grounding |
Output may float up to ±40 V (AC + DC) relative to earth ground. |
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Amplitude |
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Range |
0.01 to 10 Vpp (50 Ω), 20 Vpp (Hi-Z) |
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Resolution |
3 digits (DC offset: 0 V) |
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Sine wave accuracy (0 V DC offset) |
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5 to 10 Vpp |
±0.2 dB (1 ?Hz to 20 MHz) ±0.3 dB (20 MHz to 30.2 MHz) |
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0.01 to 5 Vpp |
±0.4 dB(1 ?Hz to 20 MHz) ±0.5 dB (20 MHz to 30.2 MHz) |
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Square wave accuracy |
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5 to 10 Vpp |
±3 % (1 ?Hz to 100 kHz) ±6 % (100 kHz to 20 MHz) ±15 % (20 MHz to 30.2 MHz) |
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0.01 to 5 Vpp |
±5 % (1 ?Hz to 100 kHz) ±8 % (100 kHz to 20 MHz) ±18 % (20 MHz to 30.2 MHz) |
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Triangle, ramp, arbitrary accuracy |
±3 % (>5 Vpp) ±5 % (<5 Vpp) |
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DC Offset |
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Range |
±5 V (limited such that |VAC peak| + |VDC| < 5 V) |
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Resolution |
3 digits (VAC = 0) |
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Accuracy |
1.5 % of setting + 0.2 mV (DC only) ±0.8 mV to ±80 mV, depending on AC and DC settings |
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Sine Wave |
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Spurious components |
<-55 dBc (non-harmonic) |
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Phase noise |
<-50 dBc in a 30 kHz band centered on the carrier, exclusive of discrete spurious signals |
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Sub-harmonic |
<-50 dBc |
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Harmonic distortion |
Level <-55 dBc <-45 dBc <-35 dBc <-25 dBc |
Frequency Range DC to 100 kHz 0.1 to 1 MHz 1 to 10 MHz 10 to 30 MHz |
Square Wave |
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Rise/fall time |
<15 ns (10 to 90 %), at full output |
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Asymmetry |
<1 % of period + 4 ns |
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Overshoot |
<5 % of peak to peak amplitude at full output |
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Ramps, Triangle and Arbitrary Waveforms |
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Rise/fall time |
45 ns (10 MHz Bessel filter) |
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Linearity |
±0.5 % of full-scale output |
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Settling time |
<1 ?s to settle within 0.1 % of final value at full output |
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Arbitrary Waveforms |
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Sample rate |
40 MHz/N, N = 1 to 234-1 |
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Memory length |
8 to 16,300 points |
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Resolution |
12 bits (0.025 % of full scale) |
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Phase |
||
Range |
±7199.999° with respect to arbitrary starting phase |
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Resolution |
0.001° |
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Amplitude Modulation |
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Source |
Internal (sine, square, triangle or ramp) or External |
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Depth |
0 to 100 % AM or DSBSC |
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Rate |
0.001 Hz to 10 kHz internal, 15 kHz max. external |
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Distortion |
<-35 dB at 1 kHz, 80 % depth |
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DSB carrier |
<-35 dB typ. at 1 kHz modulation rate (DSBSC) |
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External input |
±5 V for 100 % modulation, 100 kΩ impedance, 15 kHz bandwidth |
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Frequency Modulation |
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Source |
Internal (sine, square, triangle, ramp or arbitrary) |
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Rate |
0.001 Hz to 10 kHz |
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Span |
1 mHz to 30.2 MHz (100 kHz for triangle, ramp) |
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Phase Modulation |
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Source |
Internal (sine, square, triangle, ramp) |
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Rate |
0.001 Hz to 10 kHz |
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Span |
±7199.999° |
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Frequency Sweep |
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Type |
Linear or log, phase continuous |
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Waveform |
Up, down, up-down, single sweep |
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Time |
0.001 s to 1000 s |
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Span |
1 mHz to 30.2 MHz (to 100 kHz for triangle, ramp) |
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Markers |
Two markers may be set at any sweep point (TTL output) |
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Sweep output |
0 to 10 V linear ramp signal, synchronized to sweep |
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Burst Modulation |
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Waveform |
Any waveform except noise may be burst modulated |
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Frequency |
Sine, square to 1 MHz Triangle, ramp to 100 kHz Arbitrary to 40 MHz sample rate |
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Count |
1 to 30,000 cycles/burst (1 ?s to 500 s burst time limits) |
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Trigger Generator |
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Source |
Single, Internal, External, Line |
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Rate (internal) |
0.001 Hz to 10 kHz (2-digit resolution) |
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External trigger |
Positive or negative edge, TTL |
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Output |
TTL level |
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Standard Timebase |
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Accuracy |
±5 ppm (20 °C to 30 °C) |
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Aging |
5 ppm/year |
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Input |
10 MHz/N ± 2 ppm (N = 1 to 8) 1 Vpp minimum input level |
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Output |
10 MHz, >1 Vpp sine into 50 Ω |
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Optional Timebase |
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Type |
Ovenized AT-cut oscillator |
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Stability |
<0.01 ppm, 20 °C to 60 °C |
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Aging |
<0.001 ppm/day |
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Allan variance (1 s) |
<5 × 10-11 |
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General |
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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. |
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Non-volatile memory |
Nine sets of instrument settings can be saved and recalled |
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Dimensions |
8.5" × 3.5" × 13" (WHL) |
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Weight |
10 lbs. |
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Power |
50 W, 100/120/220/240 VAC, 50/60 Hz |
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Warranty |
One year parts and labor on defects in materials and workmanship |
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