Display Morehi DC7KG !
can you send me the link to the manual of the Hugen79 interface?
did you try it?
73
de
i2NDT Claudio
Hi Claudio,
I attach the manual. I had some problems with the Hugen interface, probably caused by the USB driver
Best regards,
Detlev
Yes, the KE5FX tool is very helpful.
Regards,
Detlev
The MAV11 has a high Noise Figure.
Regards, Detlev
Hi George,
did you measure the phase noise?
Best regards,
Detlev
Hi Roberto,
Please send a sketch of your setup.
Best regards,
Detlev
The Pluto can uses clock frequencies up to 320 MHz, you have to choose the right scaling factor to get near to 80 MHz, i.e 320 x 1/4. Pluto uses 40 x 2 = 80 and when you use 50 MHz, then you have to change the factor to 1. 50 x 1 = 50.
Hi,
the Pluto uses 40 MHz x 2 = 80 MHz, you have to change the factor from 2 to 1, when you use 50 MHz.
Detlev
Hi George,
you need a much higher time constant for the VCO:
Configuration for VCO range, time constant (4-32000s) and a lot of other parameter
Regards,
Detlev
Hi,
the control loop is much too fast.
GPSDO producer say they reach the highest accuracy after 1 day of reception:
- High frequency accuracy (when tracked GNSS over 1 day)
<5e-11 at 1s
<2e-11 at 10s
<1e-11 at 100s
<5e-12 at 1,000s
<2e-12 at 10,000s
Detlev
Hi George,
very interesting. Rohde & Schwarz says:
This figure shows the proven MER measurement for a DVB-T signal that was mainly affected by unwanted modulator phase noise. The cause cannot be seen in the constellation diagram. The R&S®ETL can make the cause visible with a new unique measurement capability.
Best regards Detlev
Hi George,
did you measure the phase noise? There is a toolkit by KE5FX: http://www.ke5fx.com/gpib/readme.htm
Regards Detlev
Hello Pierre,
you find some information in the manual: https://shop.kuhne-electronic.…/?card=1879#_tab_content4
Best regards,
Detlev, DC7KG
I have two Plutos, when both were working one, a Version B gave a lot more output on the same firmware as my version D. Maybe production tolerances, I do not know. Sometimes a basic pluto.dfu "fix" doesn't seem to flush all traces of previous firmware, at least that's my experience, a uboot-env.dfu is needed.
Hi,
how much is a lot more output?
Regards,
Detlev
Hi,
here is a conversion table.
Detlev
Hi Andreas,
do you use a 20 W amplifier or a 43 dBm amplifier?
Once I've used a 88 dBm amplifier on 1 000 kHz.
Detlev
Hi Thomas,
I think we use mixed units of measurement: dB for amplification and attenuation and W for the power.
Detlev
Hi,
you can use a directional coupler (eBay about € 15.-) and a crystal detector:
N-Typ HF-Koaxial-Richtkoppler, Weiblich, 200W, 800-2500 MHz, 5 DB ~ 40 DB, 50Ohm
Detlev
Don't forget, Analog Devices produces also the Pluto.
PE1CMO's price list is in the brochure, but no address! Very strange. I had no problems getting my 20 W amplifier from René.
Detlev
Hi Matthias,
my 20 W amplifier from PE1CMO is full duplex.
Detlev
