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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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