Re: [Discuss-gnuradio] output level of basic tx is very very low

2005-08-21 Thread Matt Ettus
Martin Dvh wrote: > I think I mixed up pin 2 and pin 5 of the transformers in my last mail. > (I do not find it intuitive to put the middle lead of a winding on the > other side of the component.) > > (pin 2 should be connected to gnd and pin 5 shouldn't) > Although information on the internet con

Re: [Discuss-gnuradio] output level of basic tx is very very low

2005-08-21 Thread Martin Dvh
The output side of the transformer is not center tapped. The input side is. The input side center tap needs to connect to ground. On the ADT1-1WT and the ADT4-1T the center taps are on pins 2 and 5 respectively. That's why I connect both -- so that you could switch to the other transformer i

Re: [Discuss-gnuradio] output level of basic tx is very very low

2005-08-21 Thread Martin Dvh
I think I mixed up pin 2 and pin 5 of the transformers in my last mail. (I do not find it intuitive to put the middle lead of a winding on the other side of the component.) (pin 2 should be connected to gnd and pin 5 shouldn't) Although information on the internet contradicts. The datasheet says

Re: [Discuss-gnuradio] output level of basic tx is very very low

2005-08-21 Thread Martin Dvh
Hi all, >Eric Blossom wrote: On Fri, Aug 19, 2005 at 02:56:53AM +0200, Martin Dvh wrote: Hi, What output voltage level should I expect from the basic tx? The docs say it delivers maximum 20 mA into 25 or 50 ohm. At 50 ohm this should result in 1.0 V max. The most I can get out of it is 50 mV T

Re: [Discuss-gnuradio] output level of basic tx is very very low

2005-08-19 Thread Eric Blossom
On Fri, Aug 19, 2005 at 02:56:53AM +0200, Martin Dvh wrote: > Hi, > What output voltage level should I expect from the basic tx? > > The docs say it delivers maximum 20 mA into 25 or 50 ohm. > > At 50 ohm this should result in 1.0 V max. > > The most I can get out of it is 50 mV This is what I

[Discuss-gnuradio] output level of basic tx is very very low

2005-08-18 Thread Martin Dvh
Hi, What output voltage level should I expect from the basic tx? The docs say it delivers maximum 20 mA into 25 or 50 ohm. At 50 ohm this should result in 1.0 V max. The most I can get out of it is 50 mV (looked using oscilloscope, also put it into the composite video-input of a tv and this al