Waveform Generator
Waveform Generator
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WAVETEK 75 ARBITRARY WAVEFORM GENERATOR |  |
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US $275.00 | 53m |
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Agilent 33220A 20MHz Function Arbitrary Waveform Generator | |
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US $1,500.00 | 4h 21m |
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HP 33120A Function Waveform Generator | 0 Bid | US $599.99 | 5h 30m |
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Philips PM 5150 arbitrary waveform generator | |
1 Bid | US $150.00 | 6h 48m |
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Virtual PC Arbitrary Waveform Generator DDS 3005 27G | |
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US $269.99 | 9h 49m |
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DDS 3X25 PC USB Function Arbitrary Waveform Generator | |
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US $106.99 | 11h 1m |
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UTG9020D DDS Universal Waveform Generators 1μHz 20MHz | |
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US $630.00 | 11h 13m |
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ICL8038CCPD DIP 14 INTERSIL Precision Waveform Generator V | |
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US $5.00 | 11h 16m |
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DDS Waveform Function Signal Generator 1u 20MHz Counter USB 110 240V | |
0 Bid | US $262.00 | 16h 7m |
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ATF20B DDS Signal Function Waveform Generator 20MHz | |
0 Bid | US $273.00 | 16h 27m |
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Digital Function Waveform Signal Generator 1Hz to 10M HZ | |
0 Bid | US $155.00 | 17h 54m |
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PRAGMATIC 2414A 20MHZ ARBITRARY WAVEFORM GENERATOR GPIB | |
US $1,295.00 | 18h 30m |
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ROHDE SCHWARZ ADS DUAL ARBITRARY WAVEFORM GENERATOR | |
US $4,995.00 | 18h 39m |
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HP AGILENT 33120A 15 MHz FUNCTION WAVEFORM GENERATOR | |
US $895.00 | 18h 56m |
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Stanford Research DS345 Arbitrary Waveform Function Generator 30Mhz | |
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US $1,050.00 | 20h 14m |
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Precision Waveform Generator IC XR8038 NEW | |
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US $8.80 | 21h 3m |
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Agilent HP 33120A Function Arbitrary Waveform Generator | |
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US $950.00 | 22h 5m |
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HP Agilent 33120A Function Arbitrary Waveform Generator w Bumpers Handle | |
1 Bid | US $600.00 | 1d 44m |
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Pragmatic 2416A Arbitrary Waveform Generator 100 MS s | |
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US $1,059.00 | 1d 1h 37m |
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Hewlett Packard HP 5182A Waveform Recorder Generator | |
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US $406.24 | 1d 3h 18m |
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Digital Function Waveform Signal Generator 02Hz 2MHz 220V Brand New | |
0 Bid | US $129.00 | 1d 5h 37m |
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DDS Waveform Function Signal Generator 1u 30MHz 110V 240V | |
0 Bid | US $329.00 | 1d 5h 42m |
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60M Oscilloscope Waveform Generator DMM Spectrum Analyzer Frequency Counter 5in1 | |
0 Bid | US $489.00 | 1d 5h 46m |
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Digital Function Waveform Signal Generator 05Hz 5MHz 220V | |
0 Bid | US $135.00 | 1d 6h 8m |
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HP 5182S WAVEFORM GENERATION SOFTWARE HP 81520A TECH DT | |
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US $3.00 | 1d 15h 37m |
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Tektronix AWG610 Arbitrary Waveform Generator | |
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US $4,780.00 | 1d 16h 51m |
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NEW HP 33120A Arbitrary Waveform Generator | |
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US $1,049.95 | 1d 17h 18m |
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PC USB Function Arbitrary Waveform Generator DDS 3005 | |
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US $299.50 | 1d 19h 14m |
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Tek Tektronix SONY AWG2000 Series Arbitrary Waveform Generator Prog Manual | |
0 Bid | US $4.98 | 1d 19h 50m |
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Function Arbitrary Waveform Generator 20MHz CE approval BRAND NEW Ship from US | |
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US $498.88 | 2d 3h 7m |
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HP 33120A FUNCTION WAVEFORM GENERATOR SERVICE GUIDE | |
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US $26.99 | 2d 5h 37m |
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HP 33120A Arbitrary Waveform Generator | |
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US $799.00 | 2d 7h 2m |
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Function Arbitrary Waveform Generators DG1022 20M 3 yrs | |
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US $499.00 | 2d 7h 32m |
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Digital USB Arbitrary Waveform Generator Counter 27GHz | |
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US $331.33 | 2d 13h 30m |
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USER MANUAL 3151 3151A WAVEFORM GENERATOR RACAL INSTRUMENTS | |
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US $49.95 | 2d 18h 19m |
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Agilent HP 33120A function arbitirary waveform generator NIST calibrated | |
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US $1,450.00 | 2d 19h 42m |
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Tektronix VX4790A Arbitrary Waveform Generator Arb VXI | |
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US $899.99 | 3d 3m |
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HP 33120A 15 MHz Function Arbitrary Waveform Generator | |
3 Bids | US $102.50 | 3d 11m |
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Tektronix AFG 3102 100MHz 2CH Arbitrary Function Waveform Generator 1Gs s | |
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US $4,875.00 | 3d 4h 55m |
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PC USB DDS 3X25 Function Arbitrary Waveform Generator | |
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US $144.99 | 3d 5h 39m |
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Data Royal Corporation Model F210A Waveform Generator | |
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US $120.00 | 3d 5h 47m |
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Rigol Function Arbitrary Waveform Generator DG1022 20M | |
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US $499.00 | 3d 16h 19m |
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USB Arbitrary Waveform FUNCTION Generator HANTEK 3x25 | |
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US $203.79 | 3d 18h 25m |
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National Instruments AT 5411 Arbitrary Waveform Generator ISA | |
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US $157.77 | 3d 18h 59m |
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Tektronix Arbitrary Waveform Generator VX4790A working | |
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US $1,003.55 | 3d 19h 7m |
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Tektronix AWG2021 10Hz to 250MHz Dual Channel Arbitrary Waveform Generator | |
US $1,895.00 | 3d 23h 28m |
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Tektronix AWG2040 Arbitrary Waveform Generator | |
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US $2,900.00 | 4d 45m |
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Function Arbitrary Waveform Generator 20MHz w CE | |
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US $498.88 | 4d 4h 43m |
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NI PXI 5411 40 MHz Arbitrary Waveform Generator | |
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US $649.99 | 4d 5h 38m |
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DDS 3005 USB PC Function Arbitrary Oscilloscope Waveform Generator | |
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US $279.99 | 4d 6h 23m |
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NATIONAL INSTRUMENTS NI 5411 WAVEFORM GENERATOR II | |
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US $999.99 | 4d 7h 19m |
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HP Agilent 33120A 15Mhz Function Arbitrary Waveform Generator | |
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US $600.00 | 4d 11h 13m |
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WAVETEK 175 ARBITRARY WAVEFORM GENERATOR | |
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US $339.00 | 4d 14h 12m |
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NEW AWG 4150 Function Arbitrary Waveform Generator 50MH | |
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US $669.00 | 4d 17h 35m |
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Fluke 292 2 Channel Waveform Generator | |
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US $5,705.00 | 4d 19h 2m |
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LeCroy LW410 Arbitrary Waveform Generator | |
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US $999.00 | 4d 19h 25m |
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Wavetek 75 Option 001 Arbitrary Waveform Generator | |
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US $274.95 | 4d 19h 36m |
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Leader 5100 Component HD Waveform Generator Tek 1720 | |
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US $399.00 | 4d 20h 50m |
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WAVETEK 30 MS s UNIVERSAL WAVEFORM GENERATOR MODEL 39 | |
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US $479.95 | 4d 22h 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 | 5d 1h |
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TEKTRONIX AFG320 ARBITRARY WAVEFORM FUNCTION GENERATOR 2 CHANNEL WARRANTY | |
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US $1,999.00 | 5d 6h 33m |
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AGILENT HP 94802 61056 ARBITRARY WAVEFORM GENERATOR | |
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US $688.00 | 5d 7h 51m |
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TEKTRONIX AWG2040 ARBITRAY WAVEFORM GENERATOR | |
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US $1,450.00 | 5d 8h 18m |
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Wavetek Model 295 Arbitrary Waveform Generator 50MHz | |
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US $499.00 | 5d 10h 48m |
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DSO 3005 USB Pc Function Arbitrary Waveform Generator | |
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US $279.95 | 5d 11h 25m |
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Hantek DDS 3X25 DC 25 MHz PC Function Arbitrary Waveform Generators | |
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US $199.00 | 5d 15h 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 19h 55m |
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WaveTek Model 175 Arbitrary Waveform Generator Instruction Manual | |
0 Bid | US $20.00 | 5d 21h 40m |
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Wavetek 680 1 Arbitrary Waveform Generator Module | |
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US $175.00 | 5d 22h |
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Tektronix VX4790A Arbitrary Waveform Generator | |
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US $2,200.00 | 5d 22h 5m |
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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 22h 40m |
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LECROY LW420 400 MS S ARBITRARY WAVEFORM GENERATOR WAVESTATION | |
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US $599.99 | 5d 23h 24m |
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IntuiLink Arbitrary Waveform Generation Software Manual | |
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US $5.00 | 5d 23h 47m |
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Pragmatic Instruments 2 MS s Arbitrary Waveform Signal Generator GPIB 2711A | |
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US $1,995.10 | 6d 5m |
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EXACT ELECTRONICS PROGRAMMABLE WAVEFORM GENERATOR GOOD | |
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US $165.00 | 6d 4h 23m |
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Agilent 33250A Arbitrary Waveform Generator Panel | |
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US $599.00 | 6d 11h 13m |
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USB Arbitrary Waveform FUNCTION Generator HANTEK SALE | |
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US $172.99 | 6d 12h 35m |
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Arbitrary Waveform Generator Frequency Counter DDS 3005 | |
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US $339.99 | 6d 16h 10m |
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Wavetek 395 01 Arbitrary Waveform Generator | |
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US $2,200.00 | 6d 19h 54m |
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ICL8038CCPD Precision Waveform Generator VCO 1976 | |
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US $60.00 | 7d 19m |
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Philips PM5150 Waveform Generator Parts Repair | |
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US $195.00 | 7d 51m |
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Tegam Pragmatic 2411A 2MHz Arbitrary Waveform Generator | |
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US $699.99 | 7d 52m |
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11776A 630 Agilent HP Waveform Generation Software Kit | |
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US $2,500.00 | 7d 1h 6m |
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MAX038CPP DIP High Frequency Waveform Generator Maxim | |
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US $39.50 | 7d 2h 23m |
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ICL8038 Precision Waveform Generator Voltage Controlled | |
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US $32.95 | 7d 11h 34m |
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5pcs XR8038ACP XR8038 Precision Waveform Generator | |
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US $9.95 | 7d 13h 50m |
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2pcs XR8038ACP XR8038 Precision Waveform Generator | |
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US $3.58 | 7d 14h 2m |
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10pcs XR8038ACP XR8038 Precision Waveform Generator | |
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US $18.68 | 7d 14h 3m |
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Tektronix AWG420 opt 01 Waveform Generator | |
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US $5,900.00 | 7d 20h 16m |
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Tektronix AWG2021 Arbitary Waveform Generator | |
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US $2,550.00 | 7d 22h 37m |
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
