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| WB-SG1 wide band generator |
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| Diabolo:
Hello, New frequency generator 1hZ at 15 GHz from BG7TBL called WB-SG1-OPT15G 1hZ at 15 GHz! The output level setting is adjustable compared to the 8 GHz model with the output level fixed. https://www.ebay.com/itm/WB-SG1-OPT15G-1Hz-15GHz-Signal-Source-Signal-generator-Power-ADJ-OCXO-BG7TBL/233507852253 ----- Characteristics: overview:1Hz-15GHz wide band output,10M-15GHz with amplifiler adjust,OCXO inside, support extern connectfrequency stanard CH1 frequency range:1Hz-200MHz CH1 step:1Hz-19.999999MHz/1Hz,20MHz-200MHz/10Hz CH1 output amplifiler:3.3Vpp CH1 plug type:BNC CH2 frequency range:10MHz-15GHz CH2 step:10Hz CH2 reference output power:+5DBM- -7dBm@1G CH2 output impedance:50 OHM CH2 plug type:SMA inside frequency stadnard:10MHz inside frequency stadnard type:OCXO inside frequency stadnard ageing:0.5Hz/year 10M frequency output power:5dBm extern frequency input range:0dBm to +20dBm run mode:CH1 frequency mode,CH2 frequency mode,CH1 sweep mode,CH2 sweep mode front panel:MODE,change mode ENT:input data <>^V:left/right/up/down key CH1:channel 1 output CH2:channel 2 output rear panel:10M REF INPUT:extern 10M input 10M REF OUTPU:10M output USB:USB port STD ADJ:inside OCXO frequency adjust power switch dc plug power :DC11.7-12.5V,star:less than 0.5A,stabilize:less than 0.25A size:L*H*D=106*55*105mm weight:350g accessory: DC12V adapter 1pcs Regards Diabolo |
| noreply:
--- Quote from: Diabolo on April 07, 2020, 12:45:54 am ---Hello, New frequency generator 1hZ at 15 GHz from BG7TBL called WB-SG1-OPT15G 1hZ at 15 GHz! The output level setting is adjustable compared to the 8 GHz model with the output level fixed. CH1 plug type:BNC CH2 frequency range:10MHz-15GHz CH2 step:10Hz CH2 reference output power:+5DBM- -7dBm@1G --- End quote --- Does anyone have the 15Ghz device? It would be really nice to verify if indeed there is ability to control the 'output level' in dBm Looking at the 'specifications' - as provided on the eBay listing (very limited) - it specifies an output level RANGE (in my humble opinion) and not that it can be 'user defined' :-\ Remember - output energy is likely to be much higher at lower frequencies - than at 15GHz - so the CH2 reference output power:+5DBM- -7dBm@1G does make sense. Note - it only specifies -7dBm @ 1GHz I wonder what it is likely to be at 15GHz? If it is indeed a decent figure - I am sure that the published specifications would be boasting about it! The fact that output levels @ 15GHz are not specified - is an indication itself - that there is nothing to shout about :P Perhaps someone with an actual device could chime-in :) |
| noreply:
--- Quote from: mankan on April 06, 2020, 04:08:26 pm ---There is a WB-SG-OPT15G available now, see https://www.aliexpress.com/item/4000724122338.html. No modulation feature though. I guess it's based on LMX2594. I wonder if there will be a LMX2595 version later? --- End quote --- Seen a device on eBay already (its not a BG7TBL design) ... https://www.ebay.com/itm/LMX2595-10MHz-19GHz-RF-Signal-Generator-Frequency-Source-Sweep-OLED-Software-/183730920473 - with these specifications 1, LMX2595 chip features • 10MHz to 19GHz output frequency • With 100KHz offset and 15GHz carrier -110dBc/Hz phase noise • 45fs RMS jitter at 7.5GHz (100Hz to 100MHz) • Programmable output power • PLL main specifications – Quality factor: –236dBc/Hz – Nominal 1/f noise: –129dBc/Hz – highest phase detector frequency – 400MHz integer mode – 300MHz fractional mode – 32-bit score N divider • Eliminate integer boundary spurs with programmable input multipliers • Output phase synchronization across multiple devices • Support for SYSREF with programmable resolution of 9ps resolution • FMCW's frequency ramp and chirp capability • Less than 20μs VCO calibration speed • 3.3V single supply operation 2, LMX2595 chip application • 5G and millimeter wave wireless infrastructure • Test and measurement equipment • Radar • MIMO • Phased array antenna and beamforming • High speed data converter clock (supports JESD204B) Looks like from their SA plot @19GHz - the output level is -26dBm and there seem to be 'lots' of harmonics in the 'same' region :-\ Can you really have a reliable 19GHz source without special design considerations and PCB / microstrip factors implemented for a $385 price tag? Does anyone have this device or made any tests with a LMX2995 design? Any feedback much appreciated :) |
| noreply:
Just went down the rabbit hole on the LMX2595 ... https://www.ti.com/product/LMX2595 That a full development PCB with access to design software (so you can drive this beast) is only $399 Interesting thing is that the LMX2595 device itself is $55 (in 1000 lot) Looking at the evaluation design - the PCB / connectors / associated electronics / your fabrication and testing time and application software - its not bad value - if you want to build your own stuff - or adapt the EVAL board to your needs. In the UK - here is link from distributor ... https://www.mouser.co.uk/ProductDetail/Texas-Instruments/LMX2595EVM?qs=EU6FO9ffTweu4F9rUl5PJQ%3D%3D Here is the user guide ... https://www.ti.com/lit/ug/snau219b/snau219b.pdf At the moment - I simply don't have the time or mindset to go further down this fascinating 'rabbit hole' - however your individual mileage might vary :-\ Good Luck & Hope above information was useful. |
| noreply:
Looking further into the modulation capability of this device ... It appears that the frequency set in CH1 will modulate the fundamental frequency set in CH2 - Provided that CH2 out=on and MOD out=on I had the impression you could modulate the fundamental of CH2 by connecting source to BNC on CH1 I guess this is not how its intended to operate - too bad - it would be a much more flexible device if this was possible and you could use the settings of CH1 as the FM frequency deviation (BW) Anyone 'opened-up' one of these devices - to see what makes it 'tick' (I still have not had a chance to do this - just got it today and there is lots of other things which need my attention before I get to the screwdrivers) - more importantly if there is any way to inject any external modulation? Great device - I checked the frequency - its clean - harmonics well below fundamental - will do some measurements soon. Real useful check is to do some phase noise measurements - if no-one has done this already :-\ |
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