eaton_2075_HP_8970a_part_2 电路图.pdf

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1、F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 1 Noise & gain measures from 2 to 18 GHz with Eaton 2075 & HP 8971b and adds RadioFans.CN 收音机爱 好者资料库 F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 2 Radio

2、Fans.CN 收音机爱 好者资料库 F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 3 Overview PART 2 MEASUREMENTS WITH EXTERNAL MIXER - This 2nd Powerpoint is illustrating hits and kinks about gain and NF measurements OVER 2 GHz with both Eaton 2075a and HP or Agilent

3、 8970a analysers. - Solutions are covering the 2 18 and up to 26 GHz band RadioFans.CN 收音机爱 好者资料库 F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 4 1- The solutions in the industrial world: - HP-8971b or c NF extension test-set - Eaton NGA frequency ex

4、tender 4- Calibration of unknown noise sources from 2 to 18 GHz 3- X, Y and Z outputs to an oscilloscope Abstract 2- Direct low-cost DSB measurements using a single broadband mixer 5- Conclusions F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 5 1- The

5、 solutions in the industrial world F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 6 The choice in the industrial world - Model b goes up to 18 GHz and c, up to 26 GHz - 2 HPIB cables needed between analyser, extention and sweep Agilent HP 8971b (or c

6、model) noise figure test-set RF inputIF outputLO input Measuring mode indicators (DSB, USB, LSB, direct Operation Modes: - Band 1 - SSB1 (10-1600 MHz) using HP 8970b internal mode - Band 2 - SSB2 (1601-2400 MHz, 700 MHz IF) - Band 3 - SSB3 (2401-18000 MHz, 450 MHz IF) - Band 4 - DSB (2401-18000 MHZ,

7、 10 MHz IF) Its principally constitued by: - a YIG following filter with HPIB tracking software - an RF front-end broadband preamp - a broadband mixer F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 7 The choice in the industrial world Agilent HP 8971b

8、 (or c model) noise figure test-set HP 8971b or c HP 8970b Sweep or syntheziser F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 8 Agilent HP 8971b (or c model) noise figure test-set The choice in the industrial world 2 to 18 GHz LO like HP 8350b - Not

9、supported by the HP 8970a model ! - In the figure, replace preamp + mixer by the NF test-set (+ additional Yig tracking filter) HPIB cable Configuration mode 1.1 choice = DSB mode with variable RF, external variable LO, fixed LO F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2

10、075 or HP 8970b and ADDS 9 The choice in the industrial world Agilent HP 8971b (or c model) noise figure test-set DSB or SSB mode F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 10 Agilent HP 8971b (or c model) noise figure test-set The choice in the i

11、ndustrial world - With relatively broadband amps, the DSB mode is preferred - In this case the error between DSB and SSB mode is little, because IF signal of equal strengths - No need of additional filter or preamplifier F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or H

12、P 8970b and ADDS 11 The choice in the industry Eaton (Maury) MT 7550 series noise gain analyser frequency extender, up to 29 GHz The choice of only DSB mode measurements possibility gives a design with : - no internal tracking filter - no HPIB tracking requirement, only between analyser and sweep ge

13、nerator - no need of additional filter, only a broadband preamplifier - far cheeper to build and align HPIB cable F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 12 The choice in the industry Eaton (Maury) MT 7550 series noise gain analyser frequency e

14、xtender 3 models choice according to the frequency domain ? no inside filter ! ? no inside filter ! Great advantage : full compatibility with : - all Agilent/HP sweeps 9350a or b series - - or sweep synthesiser - all Maury/Eaton or Agilent/HP noise/gain analyser F5DQK February 2009 part 2/2 2 to 18

15、GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 13 The choice in the industry Comparaison between Agilent/HP and Eaton/Maury designs With all HP & Eaton versions Only with HP 8970b version Compatibility Far lower Expansive Price Never foundYes but expansive2nd hand choice NoYesDSB and SSB

16、 possibility LowerGreater at low frequencies NF uncertainity at 2 GHz Eaton extenderHP test-set F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 14 HP NF test-set Eaton extender Comparaison between Agilent/HP and Eaton/Maury designs The choice in the in

17、dustry NF uncertainities compared between both extension brands (Eaton point of view) F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 15 Comparaison between Agilent/HP and Eaton/Maury designs The choice in the industry DSB and SSB measures comparaisons

18、, according to Eaton F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 16 2- Direct low-cost DSB measurements on preamplifiers with only an external RF mixer and a sweep generator F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075

19、 or HP 8970b and ADDS 17 Target : maximum gain & NF stability after 0 calibration with Measurements at F2 GHz with external mixer - DSB option choice because microwave amps have a relatively broadband at high frequencies, in comparaison of the IF frequency taken for the meas (like a 5.7 GHz preamp m

20、easured with a 70 MHz IF). - IF choice 30 or 70 MHz - - so both IFs will sure have exactly the same power - Choice of a double or preferably triple balanced mixer - Care taking of optimal (not maximal)LO injection power for minimal insertion loss, between +7 to +13 dBm - Older analyser versions like

21、 the HP 8970a or the Eaton 2075a can be used ! - Older sweep versions like the HP 8350a can also be used (not only the b version like with the HP NF test-set) ! Examples of typical balanced SMA mixers (all tested): +10 to +15double0.01-30.01-3MD-123Macom DC-2.5 0.5-8 0.03-5 0.03-5 0.1-4 IF (GHz) +12

22、double5-1874129Anaren +10triple2-18TB0218Miteq +13triple0.5-19M87CW-J +13triple1-18M83CW-J +10triple2-18M52CW-J P LO opt (dBm)BalanceRF (GHz)ModelBrand W-J = Watkins Johnson F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 18 Measurements at F2 GHz with

23、 external mixer Measurement setup with a 2-18 GHz triple balanced mixer HP 8350 sweep 2-18 GHz mainframe DUT W-J M52C mixer Popt LO = + 8 dBm LO IF RF F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 19 Gain/Nf measures in DSB with outside LO at frequen

24、cies 2 GHz With HP 8970a analyserWith Eaton 2075 analyser HP 8970aEaton 2075 mastermaster HPIB cableHPIB cable HP 8350a ou bHP 8350a ou b slave sweepslave sweep default address 8default address 8 page 3-701,1SPLED Local Talk onVar RF, ext LO, fixed IFSP1,2Enter Start6000EnterStart 6 GHzStart6000Ente

25、r Stop12000EnterStop 12 GHzStop12000Enter Step size100EnterStep sizeStep size100Enter = DSBSP2,0Enter 41,0SPDrives the HP 8350a or b sweepSP47,3Enter 4,1SPTakes the HP 8350a control SP40,2Enter 3,0SP70EnterFixed IF of 70 MHzShiftStart70Enter Sweep HP 8350Pwr lvl6dBmP LO = +6 dBmShift 6 6 6 6Enter 19

26、,1SPIF calSP33,0Enter HPIB analyser menu to enter Measurements at F2 GHz with external mixer HPIB commands examples using either the HP or Eaton analyser F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 20 LNA-3000a GOLD avec Eaton 2075a 0 2 4 6 8 10 12

27、 14 16 18 20 0500100015002000250030003500400045005000 Frequency (MHz) Gain (dB) 0,9 1,1 1,3 1,5 1,7 1,9 2,1 2,3 2,5 2,7 2,9 Nf (dB) HP 346b Gain (dB) HP 346b Nf (dB) Relatively good gain behaviour 0.2 dB Nf gap Direct gain / Nf measures Measures with external mixer Measurements at F2 GHz with extern

28、al mixer F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 21 Good and safe comportment on scalar analyser (S11 always positive) Measurements at F2 GHz with external mixer LNA-3000A F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 20

29、75 or HP 8970b and ADDS 22 DB6NT 10 GHz preamp model 102A 5 10 15 20 25 30 35 800085009000950010000105001100011500120001250013000 Frequency (MHz) Gain (dB) 0,5 1 1,5 2 2,5 3 3,5 Nf (dB) HP 346b Gain (dB) MS 65230 + 20 dB Gain (dB) HP 346b Nf (dB) MS 65230 + 20 dB Nf (dB) HP 346b source = 15 dB ENR M

30、SC source + 20 dB atten = 5 dB ENR Measurements at F2 GHz with external mixer Nf min 0.85 dB Nf min 0.58 dB ENR value influence on precision measurements F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 23 Measurements at F2 GHz with external mixer Good

31、 and safe comportment on scalar analyser (S11 always positive) DB6NT 10 GHz preamp model 102A F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 24 Measurements at F2 GHz with external mixer Broadband amp 20 dB attenuator M52C mixer Measurement of a 50 dB

32、 gain broadband amplifier - Because of its too high measured gain, a 20 dB attenuator is put at its outside. - So an additional 20 dB loss after DUT must be entered into the analyser menu. F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 25 MITEQ AMF-8S

33、-109127-25- preamplifier 0 10 20 30 40 50 60 50006000700080009000100001100012000130001400015000 Frequency (MHz) Gain (dB) 1 3 5 7 9 11 13 Nf (dB) HP 346b Gain (dB) HP 346b Nf (dB) Measurements at F2 GHz with external mixer Min 1.6 dB F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Ea

34、ton 2075 or HP 8970b and ADDS 26 Miteq AMF-8S-109127-25 preamplifier Measurements at F2 GHz with external mixer Comportment on scalar analyser, especially for its S11 curve Linear modeCompression mode showing correct S11 curve S11 slightly positive and suspicious ! Calibrating or oscillation beginni

35、ng problems ? Miteq AMF-8S-109127-25Miteq AMF-8S-109127-25 GAIN : compare both values obtained with gain/NF and scalar analyser ! F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 27 3- X, Y and Z outputs on an oscilloscope F5DQK February 2009 part 2/2 2

36、 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 28 X, Y and Z outputs on an oscilloscope - Doing only NF measurements at one fixed point in a ham band has NO SENSE ! - The great gain obtained on our masthead preamps can conduct to auto-oscillation - Example: on a scalar analyser, l

37、ook the S11 at its max gain ! Youll be estonished to see how it can approach the zero value, and in certain cases, be a little positive ! That becomes easily an oscillator ! - If the temperature goes about 40C down (from summer to winter), many masthead preamps are very easy oscillating ! - In order

38、 to feel how your (pre)amplifier is working, the only way to know it is to visualise in BROADBAND operation the regularity of both GAIN AND NF curves (french word = monotone)! - Both HP and Eaton analysers have the three X, Y and Z output possibility to visualise this. One point NF measure or broadb

39、and gain + NF curves ? F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 29 X inputY input Z input on rear DC and 0.5V/div uncal Philips PM 3209 using the X defl possibility on its time base X, Y and Z outputs on an oscilloscope F5DQK February 2009 part

40、2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 30 8 GHz13 GHz 30 dB 25 dB 10.360 GHz 0.9 dB NF 2 dB/ Gain 7.5 dB/ X, Y and Z outputs on an oscilloscope Philips PM 3209 using the X defl possibility on its time base 10 GHz DB6NT preamplifier F5DQK February 2009 part 2/2 2 to 18

41、 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 31 X, Y and Z outputs on an oscilloscope Philips PM 3209 using the X defl possibility on its time base MITEQ AMF-8S-109127-25 50 dB gain preamplifier 5 GHz15 GHz NF 2 dB/ 10 GHz 1.6 dB 50 dB F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain

42、measuring with Eaton 2075 or HP 8970b and ADDS 32 X, Y and Z outputs on an oscilloscope Tektronix 7603 using time-base and Y amplifier plugins Its 7B80 time-base unit is replaced by a 2nd conventional Y amplifier 7A16 or 7A18 module (thanks to F6BSW for this trick) X inputY input Initial test patter

43、n obtained with : - SP 7.2 Enter on Eaton 2075 - 7.1 SP on HP 8970 Substitution only possible with oscilloscope mainframes accepting plugins ! 2nd Y amp instead of time-base Not needed F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 33 X, Y and Z outpu

44、ts on an oscilloscope Tektronix 7603 using time-base and Y amplifier plugins MITEQ AMF-8S-109127-25 50 dB gain preamplifier 5 GHz15 GHz10 GHz NF min 1.6 dB 50 dB F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 34 X, Y and Z outputs on an oscilloscope T

45、ektronix 7603 using time-base and Y amplifier plugins Down East Microwave 3-3 PA (10GHz 3W amp) tried as preamplifier NF min 4.9 dB 5 GHz15 GHz10 GHz 30 dB F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 35 4- Calibration of unknown noise sources from

46、2 to 18 GHz F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 36 Unknown source calibration F5DQKlongueF5DQKcourteF1PDX AILTECH7616AILTECH7616MSCMS 65230 S/N3710S/N3300S/N4173 21/01/200921/01/200921/01/2009 F (MHz)ENR (dB)F (MHz)ENR (dB)F (MHz)ENR (dB) 1

47、06,651014,71024,19 3012,643016,143025,38 5013,945015,595024,83 7014,477015,697024,98 11014,7811015,8311025,08 15014,9315016,1315025,29 43015,1343016,1343025,51 100015,28100016,18100025,52 130015,32130016,23130025,39 150015,34150016,14150025,3 190015,49190015,84190025,28 200015,16200015,44200024,98 2

48、30015,09230015,49230023,79 300015,07300015,12300024,58 400014,72400015,32400024,46 500014,61500015,51500024,72 560014,29560015,29560024,33 600014,36600015,31600024,47 700014,7700015,52700025,04 800014,68800015,28800024,91 900014,48900015,28900024,76 1000015,431000015,531000024,7 1036015,581036015,23

49、1036024,42 1100015,481100015,131100023,88 1200015,051200014,91200023,97 1300015,781300015,231300024,06 1400014,751400013,751400023,3 1500014,931500015,581500023,18 1600014,311600013,311600023,46 1700014,441700014,391700024,72 Every 25, 15 or 6 dB noise source can be calibrated with a previous gold reference Multipoint calibration also at every GHz Calibration of a totally unknown MSC source DIRECTLY ! EXTERNAL MIXER ! F5DQK February 2009 part 2/2 2 to 18 GHz NF+gain measuring with Eaton 2075 or HP 8970b and ADDS 37 5-