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Data for MSA0304 MMIC
Hi
have some problems to find data for MMIC MSA0304, only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and gain need it for a general purpose noise source with MPS918 to cover 500-25000kHz band for selectivity tests. The reason for using this old device is that I already got some douzens what sort of narrow band noise evel could I expect in a 1kHz BW from MPS918 emitter-base-junction noise source? 73 es hpe hr fm u sn de Jan-Martin, LA8AK http://home.online.no/~la8ak/d.htm -- remove ,xnd to reply (Spam precaution!) |
J M Noeding wrote:
Hi have some problems to find data for MMIC MSA0304, only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and gain need it for a general purpose noise source with MPS918 to cover 500-25000kHz band for selectivity tests. The reason for using this old device is that I already got some douzens The MSA-0304 is identical to the Mini-Circuits MAR-3 part. Have a look at http://www.minicircuits.com/dg03-170.pdf MAR-3SM 12.5dB@100MHz gain +23.0dBm IP3 Operating current and voltage: 35mA 5.00V Dana K6JQ |
J M Noeding wrote:
Hi have some problems to find data for MMIC MSA0304, only need to know the bias resistor for Vcc=9V and/or 12V, IP3 and gain need it for a general purpose noise source with MPS918 to cover 500-25000kHz band for selectivity tests. The reason for using this old device is that I already got some douzens The MSA-0304 is identical to the Mini-Circuits MAR-3 part. Have a look at http://www.minicircuits.com/dg03-170.pdf MAR-3SM 12.5dB@100MHz gain +23.0dBm IP3 Operating current and voltage: 35mA 5.00V Dana K6JQ |
On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote:
The MSA-0304 is identical to the Mini-Circuits MAR-3 part. Have a look at http://www.minicircuits.com/dg03-170.pdf MAR-3SM 12.5dB@100MHz gain +23.0dBm IP3 Operating current and voltage: 35mA 5.00V Dana K6JQ tnx. Tried check some noise generator descriptions, although I plan to use e-b junction of MPS918 and found this good 25 years ago, but I couldn't find any indication of the RF output level from different types of sources. Some noise bridge sources may have an amplifier because - to adjust to null you need at least 40dB more signal than heard into the RX at zero My purpose is checking selectivity to compare different boatanchor receivers in different modes, and I need at least 1mV, so an MSA0304 or two doesn't seem to give sufficient gain... 73 Jan-Martin http://home.online.no/~la8ak/e.htm -- remove ,xnd to reply (Spam precaution!) |
On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote:
The MSA-0304 is identical to the Mini-Circuits MAR-3 part. Have a look at http://www.minicircuits.com/dg03-170.pdf MAR-3SM 12.5dB@100MHz gain +23.0dBm IP3 Operating current and voltage: 35mA 5.00V Dana K6JQ tnx. Tried check some noise generator descriptions, although I plan to use e-b junction of MPS918 and found this good 25 years ago, but I couldn't find any indication of the RF output level from different types of sources. Some noise bridge sources may have an amplifier because - to adjust to null you need at least 40dB more signal than heard into the RX at zero My purpose is checking selectivity to compare different boatanchor receivers in different modes, and I need at least 1mV, so an MSA0304 or two doesn't seem to give sufficient gain... 73 Jan-Martin http://home.online.no/~la8ak/e.htm -- remove ,xnd to reply (Spam precaution!) |
J M Noeding wrote:
On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote: The MSA-0304 is identical to the Mini-Circuits MAR-3 part. Have a look at http://www.minicircuits.com/dg03-170.pdf MAR-3SM 12.5dB@100MHz gain +23.0dBm IP3 Operating current and voltage: 35mA 5.00V My purpose is checking selectivity to compare different boatanchor receivers in different modes, and I need at least 1mV, so an MSA0304 or two doesn't seem to give sufficient gain... I suppose you could use one or two more MPS918s in an untuned amplifier configuration before a MAR-3. You don't need gain flatness, do you? The MAR-3 should give you a well-defined, well-matched 50ohm output, since you have 'em you might try using one. Dana |
J M Noeding wrote:
On Mon, 01 Dec 2003 19:14:37 -0800, Dana Myers wrote: The MSA-0304 is identical to the Mini-Circuits MAR-3 part. Have a look at http://www.minicircuits.com/dg03-170.pdf MAR-3SM 12.5dB@100MHz gain +23.0dBm IP3 Operating current and voltage: 35mA 5.00V My purpose is checking selectivity to compare different boatanchor receivers in different modes, and I need at least 1mV, so an MSA0304 or two doesn't seem to give sufficient gain... I suppose you could use one or two more MPS918s in an untuned amplifier configuration before a MAR-3. You don't need gain flatness, do you? The MAR-3 should give you a well-defined, well-matched 50ohm output, since you have 'em you might try using one. Dana |
I have built a noise source using a series of amplifier modules, similar
to the MSA-0304. It is essentually flat in frequency response up to several hundred MHz, which I needed for my application. Granted, it took quite a few stages, built in a couple of boxes to avoid any chance of instability due to the high gain. I did have to pay attention to the total integrated power, to keep the output stage from distorting the noise, but for some sort of Rx bridge, it would have more than enough drive. Jim Pennell N6BIU |
I have built a noise source using a series of amplifier modules, similar
to the MSA-0304. It is essentually flat in frequency response up to several hundred MHz, which I needed for my application. Granted, it took quite a few stages, built in a couple of boxes to avoid any chance of instability due to the high gain. I did have to pay attention to the total integrated power, to keep the output stage from distorting the noise, but for some sort of Rx bridge, it would have more than enough drive. Jim Pennell N6BIU |
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