Waveform Generator
Waveform Generator
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HP 33120A 15 MHz Function Arbitrary Waveform Generator |  |
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US $850.00 | 15m |
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Pragmatic 2414A Arbitrary Waveform Generators | |
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US $899.00 | 1h 45m |
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PC Function Arbitrary Waveform Generator DDS 3X25 25M | |
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US $152.99 | 1h 48m |
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AGILENT 33120A Arbitrary Waveform Generator CALIBRATED | |
2 Bids | US $500.00 | 1h 51m |
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National instruments PXI 5412 waveform generator NI | |
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US $950.00 | 3h 16m |
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HP Agilent E1441A Arbitrary Waveform Generator | |
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US $2,750.00 | 3h 42m |
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DDS 3005 USB PC Function Arbitrary Waveform Generator | |
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US $339.00 | 4h 58m |
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HP Agilent Z2471A Arbitrary Waveform Generator | |
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US $2,500.00 | 10h 20m |
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Lecroy LW420 Arbitrary Waveform Generator 400 MHz | |
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US $4,500.00 | 10h 43m |
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Lecroy LW420A Arbitrary Waveform Generator 400 MHz | |
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US $5,450.00 | 10h 43m |
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Rohde Schwarz AMIQ03 B1 B2 K11 Waveform Generator 2 | |
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US $4,500.00 | 10h 55m |
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Racal 3152 Waveform Generator VXI | |
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US $4,950.00 | 10h 55m |
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Racal 3153 3 Channel Arbitrary Waveform Generator | |
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US $7,795.00 | 10h 55m |
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Tektronix AWG2021 Arbitrary Waveform Generator | |
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US $2,950.00 | 11h 18m |
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Tektronix AWG2041 01 09 Arbitrary Waveform Generator wi | |
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US $4,950.00 | 11h 18m |
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Tektronix AWG2041 010 31R Arbitrary Waveform Generator | |
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US $4,250.00 | 11h 18m |
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Tektronix VX4790A Arbitrary Waveform Generator | |
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US $2,495.00 | 11h 36m |
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NI PCI 6542 Digital Waveform Generator Analyzer Card | |
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US $999.99 | 14h 13m |
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MAX038 MAX038CPP High Frequency Waveform Generator | |
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US $34.95 | 14h 13m |
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Rigol Function Arbitrary Waveform Generator DG2041A 40M | |
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US $985.00 | 14h 53m |
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10MHz Function Generator with Waveform Display EM1656 | |
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US $299.00 | 15h 40m |
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Analogic DBS2050A Arbitrary Waveform Generator VXI card | |
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US $7,500.00 | 16h 24m |
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Agilent 33120A 15Mhz function waveform generator | |
18 Bids | US $112.50 | 18h 6m |
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Agilent 33250A Function Arbitrary Waveform Generator | |
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US $3,500.00 | 20h 3m |
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Wavetek 395 Arbitrary Waveform Generator | |
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US $3,250.00 | 21h 28m |
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Wavetek 75A 5 MHz Arbitrary Waveform Generator | |
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US $695.00 | 21h 28m |
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Wavetek 295 Synthesized Arbitrary Waveform Generator 5 | |
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US $2,495.00 | 21h 28m |
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Agilent 33250A Waveform Generator SERVICE Guide | |
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US $24.95 | 22h 26m |
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Agilent 33250A Waveform Generator Users Guide | |
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US $24.95 | 22h 28m |
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Pc Port Function Waveform Generator DDS 3X25 usb 25Mhz | |
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US $152.99 | 1d 10h 59m |
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YOKOGAWA VB8000 Arbitrary waveform Generator QAM | |
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US $2,000.00 | 1d 13h 13m |
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Tektronix AWG2041 Arbitrary Waveform Generatoropt 1R01 | |
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US $2,280.00 | 1d 13h 20m |
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XR8038 Precision Waveform Generator Exar Corporation | |
0 Bid | US $8.00 | 1d 13h 35m |
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Wavetek 75 Abitrary Waveform Function Generator Opt 1 | |
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US $350.00 | 1d 14h 40m |
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HP 33120A Arbitrary Waveform Generator 15 MHz Function | |
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US $645.95 | 1d 15h 20m |
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SONY TEKTRONIX AWG2005 WAVEFORM GENERATOR USER MANUAL | |
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US $110.00 | 1d 18h |
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HP 33120A Function Waveform Generator Service Guide | |
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US $12.99 | 2d 1h 20m |
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Tektronix AWG510 ARBITRARY WAVEFORM GENERATOR 1Gs s | |
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US $1,700.00 | 2d 13h 56m |
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ECG892 IC PRECISION WAVEFORM GENERATOR LOT OF 6 | |
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US $87.00 | 2d 14h 51m |
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Wavetek Arbitrary Waveform Generator Model 75 | |
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US $250.00 | 2d 15h 17m |
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Sony Tektronix AWG2020 Arbitary Waveform Generator | |
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US $3,500.00 | 2d 15h 17m |
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National Instruments NI PXI 5412 Waveform Generator | |
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US $1,100.00 | 2d 16h 28m |
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AWG 2021 Arb Waveform Generator | |
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US $2,395.00 | 2d 16h 57m |
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Hp Agilent 33120a waveform function generator Opt 1 | |
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US $1,095.00 | 2d 19h 23m |
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NI PCI 6561 LVDS DIGITAL WAVEFORM GENERATOR ANALYZER | |
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US $689.00 | 2d 19h 39m |
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Precision Waveform Generator IC ICL8038 ICL8038CCPD | |
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US $22.48 | 3d 13h 17m |
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HP 33120A Function Arbitrary Waveform Generator Manual | |
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US $40.00 | 3d 18h 9m |
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LeCroy LW420A 2 Ch Arbitrary Waveform Generator 400Ms s | |
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US $1,999.99 | 4d 1h 8m |
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WGATE SYS AWG 101 ARBITRARY WAVEFORM GENERATOR | |
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US $109.99 | 4d 1h 35m |
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Tek Tektronix 162 Waveform Generator Manual | |
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US $15.00 | 4d 2h 24m |
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Buchla Model 259e Complex Waveform Generator | |
2 Bids | US $1,275.00 | 4d 3h 26m |
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PC Function Arbitrary Waveform Generator DDS 3X25 25M | |
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US $152.88 | 4d 6h 55m |
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RIGOL DG2041 AWG Waveform Generator USB GPIB LAN RS232 | |
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US $945.00 | 4d 11h 54m |
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Hp 33120A Function Arbitrary waveform Generator opt001 | |
0 Bid | US $119.00 | 4d 13h 50m |
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Tektronix AWG610 800 MHz Arbitrary Waveform Generator | |
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US $7,500.00 | 4d 18h 30m |
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HP 33120A Function Arbitrary Waveform Generator 100KHz | |
0 Bid | US $550.00 | 4d 20h 20m |
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TEKTRONIX AWG610 ARBITRARY WAVEFORM GENERATOR | |
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US $14,000.00 | 4d 21h 28m |
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Agilent HP 5182A Waveform Recorder Generator | |
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US $445.00 | 4d 21h 28m |
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Hp Agilent 33120a waveform function generator 15Mhz | |
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US $690.00 | 4d 23h 32m |
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Arbitrary Waveform Generator DDS 3005 SALE | |
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US $299.99 | 5d 3h 22m |
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ICL8038CCPD Precision Waveform Generator VCO 1976 | |
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US $50.00 | 5d 9h 30m |
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WAVETEK 75 Waveform Generator Prelim Operators Manual | |
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US $34.99 | 5d 11h 58m |
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Wavetek Arbitrary Waveform Generator Model 75 001 | |
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US $400.00 | 5d 12h 19m |
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HP Agilent 33250A 80MHz waveform generator NEW | |
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US $3,700.00 | 5d 13h 36m |
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RIGOL DG1022 Function Generator Waveform Generator | |
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US $579.00 | 5d 15h |
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Wavetek 195 Universal Waveform Generator Manual | |
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US $99.00 | 5d 19h 16m |
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DSO 3005 USB Pc Function Arbitrary Waveform Generator | |
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US $339.00 | 6d 7h 30m |
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Wavetek 75 Arbitrary Waveform Generator w Option 001 | |
0 Bid | US $75.00 | 6d 15h 26m |
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Precision Waveform Generator IC XR8038 NEW | |
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US $8.80 | 6d 16h 28m |
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HP 33130A Function Arbitrary Waveform Generator Guide | |
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US $40.00 | 6d 16h 54m |
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Tektronix AWG520 2Ch Arbitrary Waveform Generator w 4M | |
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US $9,750.00 | 6d 18h 36m |
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GenRad 9024 0257 01 Arbitrary Waveform Generator | |
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US $297.00 | 6d 19h 23m |
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Hewlett Packard HP 5182A Waveform Recorder Generator | |
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US $624.99 | 6d 22h 43m |
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HP 33120A Function Arbitrary Waveform Generator w opt 1 | |
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US $1,200.00 | 6d 23h 1m |
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HP 33120A 15MHz Function Arbitrary Waveform Generator | |
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US $495.00 | 6d 23h 4m |
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Tektronix AWG710 Arbitrary Waveform Generator 4GS s | |
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US $11,500.00 | 6d 23h 21m |
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Copley Control Waveform Generator 604 | |
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US $1,000.00 | 7d 2h 1m |
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AGILENT HP 33120A 15 MHz FUNCTION WAVEFORM GENERATOR | |
US $895.00 | 7d 14h 7m |
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RIGOL DG2041A AWG Waveform Generator GPIB LAN RS232 | |
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US $945.00 | 7d 17h 40m |
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HP 33120A FUNCTION WAVEFORM GENERATOR SERVICE GUIDE | |
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US $26.99 | 8d 1h 3m |
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Function Arbitrary Waveform Generators DG1022 20M 3 yrs | |
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US $494.10 | 8d 2h 57m |
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Hantek Arbitrary Waveform Generator DDS3005 Counter | |
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US $323.37 | 8d 3h 3m |
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Wavetek 195 Waveform Generator w opt 001 Reduced | |
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US $1,799.00 | 8d 12h |
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ROHDE SCHWARZ ADS DUAL ARBITRARY WAVEFORM GENERATOR | |
US $4,995.00 | 8d 13h 25m |
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BK Precision 4076 50 MHz Arbitrary Waveform Generator | |
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US $2,125.00 | 8d 19h 57m |
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TEKTRONIX AWG430 ARBITRARY WAVEFORM GENERATOR 001 003 | |
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US $9,750.00 | 8d 22h 46m |
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HP 33120A Waveform Function Generator User Manual Guide | |
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US $16.59 | 9d 56m |
please help?
what is the maximum frequency output for a sqaure wave from the hp 33120a waveform generator?
it is 15MKH
Why Uninterruptible Power Supplies Are In Such Demand
Business and organisational processes rely on information technology and this in turn requires a clean source of stable and reliable electrical power. The increasing demands for power on the UK electricity grid are placing unprecedented pressure on an aging infrastructure and this is becoming even more evident in heavily populated areas such as London’s Canary Wharf. Here demand for electrical power is greater at times than can be supplied to power the banking industries data centres and IT operations.
Defining Uninterruptible Power Supplies
UPS Systems, uninterruptible power supplies, back-up power systems all have one fundamental characteristic; they provide an instantaneous or almost instantaneous source of battery power when their primary AC supply fails – be this the mains power supply or some alternative source such as a standby generator.
An uninterruptible power supply sits between the mains power supply and critical load to be protected – the loading being any application, system or complete data center site that needs a continuous source of electrical power. When mains power is present a UPS provides filtering and conditioning surpressing, clamping or quite simply filtering to zero the impact from harmful power problems such as spikes, electrical noise, harmonics, sags, surges and brownouts. When the mains power supply fails (a blackout or power outage), UPS systems use their battery sets to provide back-up power as an alternative energy source. Running an uninterruptible power supply can quite simply ensure ‘business as usual’ – IT systems, phone systems, services, estores, data centres and operations simply continue and ride through the power failure.
Selecting An Uninterruptible Power Supply
There are several types of uninterruptible power supply or UPS topology.
- On-line double-conversion UPS: with a constantly running inverter providing a conditioned, regulated AC supply. The inverter draws a DC supply from its rectifier which is powered from the mains or batteries.
- Line interactive UPS: with a built-in automatic voltage stabiliser providing voltage stabilisation when mains power is present and an inverter that switches in when the mains power supply fails.
- Standby UPS (Off-line): with a basic filter when mains power is present and an inverter than turns-on when the mains power supply fails.
On-line UPS systems are also known as ‘double-conversion UPS’ because of their operation, converting mains AC power to DC (rectification) to charge a battery set and then converting this DC back to AC (inverter) to power the load. An online UPS has a constantly running digitally controlled inverter which will provide a stable, voltage and frequency independent (VFI) output waveform (sinewave). When mains power is present, the rectification process and additional built-in filters providing filtering and conditioning.
Apart from the quality if its output waveform, On-line UPS also include an automatic bypass system. This monitors the output waveform of the inverter and will transfer the load to the mains supply, automatically should the inverter output wave star to collapse – either due to an internal fault or overload condition.
On-line UPS systems run from 700VA typically up to 800kVA with options for parallel/redundant N+X configurations (for additional system resilience, higher MTBF (mean time between failure) and availability) from 10kVA upwards.
There are also typically two types of on-line UPS system: transformerless and transformer-based systems. Transformer-based UPS systems are most commonly used to protected large applications such as datacentres, entire operating sites, hospital and other critical applications. They tend to have a slightly lower operating efficiency and heat output than a transformerless system. Transformerless systems offer smaller footprints, size and weight, higher operating efficiency, silent operation (except for their fans) and lower heat outputs. On-line UPS tend to be tower formats with rackmount options. They are ideal for critical applications.
A Line Interactive UPS system is voltage independent (VI) only. The UPS uses built-in passive electronic filters to surpress spikes and electrical noise. An automatic voltage stabiliser (AVS – also known as an automatic voltage regulator AVR) stabilises any fluctuations in voltage (sags, surges and brownouts). The output frequency of a line interactive UPS therefore follows the input frqeuency. The UPS tracks the frequency and switches on its inverter when this falls outside pre-set operating limits. The same function applies to voltage fluctuations and mains power breaks. The line interactive UPS typically runs from 300VA to 3kVA. However, some on-line UPS also include line interactive as an optional operating mode – known as an ‘ECO Mode’ because of its higher operating efficiency. The output waveform may be a sinewave, step-sinewave or squarewave and care should be taken when selecting a line interactive UPS as its waveform may not be suitable for the identified loads. Line Interactive UPS tend to be tower formats with rackmount options. They are ideal for larger PCs, file servers and other such applications.
Standby or off-line UPS are passive UPS systems. They typically run from 300VA to 1kVA and their output waveform simply tracks the input mains voltage and frequency. The UPS will include some form of basic filtering to provide protection from spikes and electrical noise but will resort to battery power and an inverter set-up to switch on when the mains power voltage fluctuates wildly or fails. Standby UPS tend to be desktop sized and are ideal for the protection of small PCs, EPoS terminals and office peripherals.
Battery Runtime and Extended Runtime Options
Battery runtime for uninterruptible power supplies is load and battery size dependent. Most UPS have an internal battery pack and the lower the load placed on the UPS, the longer the battery will run for on mains power supply failure. Most standby and line interactive UPS rely on UPS oversizing to provide longer runtimes. The larger UPS systems tend to offer an extended runtime pack option but for a further limited operating period to protect their inverter systems.
On-line UPS systems on the other hand have a constantly running inverter. This can again be ‘under-loaded’ to increase battery back-up time but on-line uninterruptible power supplies also offer the option to connect battery extension packs. Off course for larger UPS systems rather than increase battery packs, standby generators and even fuel cells are used.
Maintenance Bypasses
For critical installations, an external maintenance bypass is always recommended. This allows the UPS system to be maintained during normal working-hours without disruption to the connected loads. The UPS can be safely isolated and disconnected for removal, service, swap-out or upgrade without interruption.
About the Author
Jason Koffler is the Managing Director of Critical Power Supplies Ltd, a leading independent UK supplier of Jason Koffler is the Managing Director of Critical Power Supplies Ltd, a leading independent UK supplier of uninterruptible power supplies, standby power protection systems and ECO energy management solutions.
SPI Digital Pot Controlling Analog Square Waveform Generator
