Waveform Generator
Waveform Generator
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DDS Waveform Function Signal Generator 1u 20MHz Counter USB 110 240V |  |
0 Bid | US $262.00 | 2h 6m |
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ATF20B DDS Signal Function Waveform Generator 20MHz | |
0 Bid | US $273.00 | 2h 26m |
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Digital Function Waveform Signal Generator 1Hz to 10M HZ | |
0 Bid | US $155.00 | 3h 53m |
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PRAGMATIC 2414A 20MHZ ARBITRARY WAVEFORM GENERATOR GPIB |  |
US $1,295.00 | 4h 30m |
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ROHDE SCHWARZ ADS DUAL ARBITRARY WAVEFORM GENERATOR | |
US $4,995.00 | 4h 39m |
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HP AGILENT 33120A 15 MHz FUNCTION WAVEFORM GENERATOR | |
US $895.00 | 4h 56m |
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Stanford Research DS345 Arbitrary Waveform Function Generator 30Mhz | |
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US $1,050.00 | 6h 13m |
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Precision Waveform Generator IC XR8038 NEW | |
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US $8.80 | 7h 2m |
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Agilent HP 33120A Function Arbitrary Waveform Generator | |
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US $950.00 | 8h 4m |
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HP Agilent 33120A Function Arbitrary Waveform Generator w Bumpers Handle | |
1 Bid | US $600.00 | 10h 43m |
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Pragmatic 2416A Arbitrary Waveform Generator 100 MS s | |
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US $1,059.00 | 11h 37m |
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Hewlett Packard HP 5182A Waveform Recorder Generator | |
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US $406.24 | 13h 18m |
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Digital Function Waveform Signal Generator 02Hz 2MHz 220V Brand New | |
0 Bid | US $129.00 | 15h 37m |
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DDS Waveform Function Signal Generator 1u 30MHz 110V 240V | |
0 Bid | US $329.00 | 15h 42m |
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60M Oscilloscope Waveform Generator DMM Spectrum Analyzer Frequency Counter 5in1 | |
0 Bid | US $489.00 | 15h 46m |
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Digital Function Waveform Signal Generator 05Hz 5MHz 220V | |
0 Bid | US $135.00 | 16h 7m |
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HP 5182S WAVEFORM GENERATION SOFTWARE HP 81520A TECH DT | |
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US $3.00 | 1d 1h 37m |
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Tektronix AWG610 Arbitrary Waveform Generator | |
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US $4,780.00 | 1d 2h 51m |
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NEW HP 33120A Arbitrary Waveform Generator | |
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US $1,049.95 | 1d 3h 18m |
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PC USB Function Arbitrary Waveform Generator DDS 3005 | |
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US $299.50 | 1d 5h 13m |
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Tek Tektronix SONY AWG2000 Series Arbitrary Waveform Generator Prog Manual | |
0 Bid | US $4.98 | 1d 5h 50m |
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Function Arbitrary Waveform Generator 20MHz CE approval BRAND NEW Ship from US | |
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US $498.88 | 1d 13h 6m |
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HP 33120A FUNCTION WAVEFORM GENERATOR SERVICE GUIDE | |
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US $26.99 | 1d 15h 37m |
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HP 33120A Arbitrary Waveform Generator | |
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US $799.00 | 1d 17h 2m |
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Function Arbitrary Waveform Generators DG1022 20M 3 yrs | |
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US $499.00 | 1d 17h 32m |
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Digital USB Arbitrary Waveform Generator Counter 27GHz | |
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US $333.81 | 1d 23h 29m |
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USER MANUAL 3151 3151A WAVEFORM GENERATOR RACAL INSTRUMENTS | |
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US $49.95 | 2d 4h 18m |
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Agilent HP 33120A function arbitirary waveform generator NIST calibrated | |
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US $1,450.00 | 2d 5h 42m |
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Tektronix VX4790A Arbitrary Waveform Generator Arb VXI | |
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US $899.99 | 2d 10h 3m |
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HP 33120A 15 MHz Function Arbitrary Waveform Generator | |
3 Bids | US $102.50 | 2d 10h 10m |
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Virtual PC Arbitrary Waveform Generator DDS 3005 27G | |
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US $265.00 | 2d 14h 30m |
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Tektronix AFG 3102 100MHz 2CH Arbitrary Function Waveform Generator 1Gs s | |
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US $4,875.00 | 2d 14h 55m |
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PC USB DDS 3X25 Function Arbitrary Waveform Generator | |
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US $144.99 | 2d 15h 39m |
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Data Royal Corporation Model F210A Waveform Generator | |
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US $120.00 | 2d 15h 47m |
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Rigol Function Arbitrary Waveform Generator DG1022 20M | |
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US $499.00 | 3d 2h 19m |
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USB Arbitrary Waveform FUNCTION Generator HANTEK 3x25 | |
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US $205.31 | 3d 4h 25m |
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National Instruments AT 5411 Arbitrary Waveform Generator ISA | |
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US $157.77 | 3d 4h 59m |
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Tektronix Arbitrary Waveform Generator VX4790A working | |
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US $1,003.55 | 3d 5h 6m |
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Tektronix AWG2021 10Hz to 250MHz Dual Channel Arbitrary Waveform Generator | |
US $1,895.00 | 3d 9h 27m |
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Tektronix AWG2040 Arbitrary Waveform Generator | |
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US $2,900.00 | 3d 10h 45m |
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Function Arbitrary Waveform Generator 20MHz w CE | |
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US $498.88 | 3d 14h 43m |
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NI PXI 5411 40 MHz Arbitrary Waveform Generator | |
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US $649.99 | 3d 15h 37m |
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DDS 3005 USB PC Function Arbitrary Oscilloscope Waveform Generator | |
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US $279.99 | 3d 16h 23m |
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NATIONAL INSTRUMENTS NI 5411 WAVEFORM GENERATOR II | |
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US $999.99 | 3d 17h 19m |
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HP Agilent 33120A 15Mhz Function Arbitrary Waveform Generator | |
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US $600.00 | 3d 21h 12m |
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WAVETEK 175 ARBITRARY WAVEFORM GENERATOR | |
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US $339.00 | 4d 12m |
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NEW AWG 4150 Function Arbitrary Waveform Generator 50MH | |
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US $669.00 | 4d 3h 34m |
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Fluke 292 2 Channel Waveform Generator | |
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US $5,705.00 | 4d 5h 2m |
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LeCroy LW410 Arbitrary Waveform Generator | |
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US $999.00 | 4d 5h 25m |
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Wavetek 75 Option 001 Arbitrary Waveform Generator | |
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US $274.95 | 4d 5h 36m |
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Leader 5100 Component HD Waveform Generator Tek 1720 | |
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US $399.00 | 4d 6h 50m |
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WAVETEK 30 MS s UNIVERSAL WAVEFORM GENERATOR MODEL 39 | |
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US $479.95 | 4d 8h 36m |
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Sony Tektronix 012 1408 00 Cable Option 03 for AWG 2021 Waveform Generator | |
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US $99.00 | 4d 11h |
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TEKTRONIX AFG320 ARBITRARY WAVEFORM FUNCTION GENERATOR 2 CHANNEL WARRANTY | |
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US $1,999.00 | 4d 16h 32m |
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AGILENT HP 94802 61056 ARBITRARY WAVEFORM GENERATOR | |
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US $688.00 | 4d 17h 50m |
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TEKTRONIX AWG2040 ARBITRAY WAVEFORM GENERATOR | |
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US $1,450.00 | 4d 18h 18m |
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Wavetek Model 295 Arbitrary Waveform Generator 50MHz | |
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US $499.00 | 4d 20h 47m |
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DSO 3005 USB Pc Function Arbitrary Waveform Generator | |
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US $279.95 | 4d 21h 24m |
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Hantek DDS 3X25 DC 25 MHz PC Function Arbitrary Waveform Generators | |
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US $199.00 | 5d 1h 18m |
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Pragmatic Instruments 2711A 2 MS s Arbitrary Waveform Generator Plus 010190 | |
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US $1,993.22 | 5d 5h 55m |
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WaveTek Model 175 Arbitrary Waveform Generator Instruction Manual | |
0 Bid | US $20.00 | 5d 7h 40m |
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Wavetek 680 1 Arbitrary Waveform Generator Module | |
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US $175.00 | 5d 8h |
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Tektronix VX4790A Arbitrary Waveform Generator | |
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US $2,200.00 | 5d 8h 4m |
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HP 8175A Digital Data Waveform Signal Generator with Probes 4x 15462A 1x 15463A | |
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US $299.95 | 5d 8h 39m |
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LECROY LW420 400 MS S ARBITRARY WAVEFORM GENERATOR WAVESTATION | |
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US $599.99 | 5d 9h 24m |
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IntuiLink Arbitrary Waveform Generation Software Manual | |
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US $5.00 | 5d 9h 46m |
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Pragmatic Instruments 2 MS s Arbitrary Waveform Signal Generator GPIB 2711A | |
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US $1,995.10 | 5d 10h 5m |
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EXACT ELECTRONICS PROGRAMMABLE WAVEFORM GENERATOR GOOD | |
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US $165.00 | 5d 14h 23m |
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Agilent 33250A Arbitrary Waveform Generator Panel | |
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US $599.00 | 5d 21h 13m |
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USB Arbitrary Waveform FUNCTION Generator HANTEK SALE | |
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US $172.99 | 5d 22h 35m |
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Arbitrary Waveform Generator Frequency Counter DDS 3005 | |
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US $339.99 | 6d 2h 10m |
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Wavetek 395 01 Arbitrary Waveform Generator | |
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US $2,200.00 | 6d 5h 53m |
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ICL8038CCPD Precision Waveform Generator VCO 1976 | |
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US $60.00 | 6d 10h 19m |
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Philips PM5150 Waveform Generator Parts Repair | |
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US $195.00 | 6d 10h 50m |
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Tegam Pragmatic 2411A 2MHz Arbitrary Waveform Generator | |
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US $699.99 | 6d 10h 52m |
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11776A 630 Agilent HP Waveform Generation Software Kit | |
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US $2,500.00 | 6d 11h 5m |
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MAX038CPP DIP High Frequency Waveform Generator Maxim | |
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US $39.50 | 6d 12h 22m |
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ICL8038 Precision Waveform Generator Voltage Controlled | |
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US $32.95 | 6d 21h 34m |
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5pcs XR8038ACP XR8038 Precision Waveform Generator | |
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US $9.95 | 6d 23h 50m |
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2pcs XR8038ACP XR8038 Precision Waveform Generator | |
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US $3.58 | 7d 2m |
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10pcs XR8038ACP XR8038 Precision Waveform Generator | |
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US $18.68 | 7d 2m |
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Tektronix AWG420 opt 01 Waveform Generator | |
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US $5,900.00 | 7d 6h 16m |
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Tektronix AWG2021 Arbitary Waveform Generator | |
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US $2,550.00 | 7d 8h 36m |
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AD5930 Programmable Frequency Waveform Generator 2 | |
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US $17.99 | 7d 9h 16m |
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PC Based USB Function Arbitrary Waveform Generator 3X25 | |
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US $151.90 | 7d 16h 16m |
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TEKTRONIX AWG520 Arbitrary Waveform Generator | |
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US $9,995.00 | 7d 16h 34m |
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Agilent 33120A 15 MHz Function Arbitrary Waveform Generator | |
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US $775.00 | 7d 16h 35m |
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USB Waveform Generator27GH Frequency Counter portable | |
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US $449.00 | 7d 19h 22m |
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Rigol Arbitrary Waveform Generator DG1022 20MHz 2 Chennal OZ Seller | |
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US $520.00 | 8d 2h 52m |
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Picotest G5100A Waveform Generator NEW | |
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US $1,899.00 | 8d 9h 10m |
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
