10mhz distribution amplifier

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10mhz distribution amplifier

The unit is housed in a 1U high x 19" wide shelf and is available in the impedances and connector types. Products Next Level. Rack Systems Next Level. RF Over Fibre. Modular System. Remote Controllers. Frequency Converter. Distribution Amplifiers. Test Loop Translators. Active Combiners. Active Splitters. Attenuators and DC Blocks. Cable Assembly.

10mhz distribution amplifier

Fibre Optic. Frequency Converters. Impedance Transformers. Isolators And Circulators. Lightning Arrestors. Power Supplies.

Distribution

Scorpion Components Mounting System.There is no warranty that it will work in all cases, configurations and or other such environments. Any arrangements for acquisition of data and or parts and their specific performance are between the interested parties only. We assume no liability. Brooks passed away at the age of 78 in after a long illness. His excellent work on GPS controlled Frequency Standards has made this home made, highly accurate, lab quality, 10Mhz Frequency Standard possible for the average ham.

He is greatly missed. Jimmy W7CQ. What follows are potential sources to contact and ordering information for the major components of my 10Mhz GPS Frequency Standard. Major Components Include:. Distribution Amplifier.

Download a text file of the commands for Shera 1. I have the HEX file available. I do not provide programmed PIC's. Please contact me via the e-mail located at the bottom of this page on how to get this HEX file. A GPS receiver without position hold will work but at reduced accuracy. Read the specs before you buy. A few extra bucks here can improve the accuracy of your frequency standard.

10mhz distribution amplifier

Again - Check it out and compare specs before you buy. This unit is built for extreme accuracy on the 1PPS signal. The Oncore receiver plugged right into the board. It provided power for the receiver and ASCII output to your computer but alas neither are available any more. A working interface can be built from scratch with a MAX and discrete parts to get RS outputs with a little research on your part.

Almost any amplified GPS antenna will work. Just check to see the current draw of your chosen GPS antenna is less than 70 ma at 5vdc before you buy.The most common are 4,8, and ways but larger L-band distribution amplifiers up to 32 or even larger capacities are available. We produce distribution amplifiers which we call active splitters and passive splitters. In general the distribution amplifiers are unity gain but some especially 4-ways may be made with more gain.

Products Next Level. Rack Systems Next Level. RF Over Fibre. Modular System. Remote Controllers. Frequency Converter. Distribution Amplifiers. Test Loop Translators. Active Combiners. Active Splitters. Attenuators and DC Blocks. Cable Assembly. Fibre Optic. Frequency Converters. Impedance Transformers. Isolators And Circulators.

Lightning Arrestors. Power Supplies. Scorpion Components Mounting System. Equipment repair. Professional Services. Essential Maintenance. Custom Build Need something custom? We have over 20 years experience of providing solutions, such as extra redundancy, specific RF performance or even building chassis to fit certain architecture.

Markets Next Level. Satellite Operator. Oil And Gas. Government and Defence.Device uses 74lvc2g04 inverters as limiting amps and a 74lvc2g mux to switch. When using the internal ocxo system noise floor is about However, if you input an external 10MHz, The phase noise goes all to hell beween about Hz and 3kHz. Looks like it might be the internal 10MHz getting on the power supply lines but that's not confirmed. If you remove the internal ocxo, this problem goes away.

So, auto-switching is basically broken. I've added a pic with and without external 10MHz applied. The unit seems to be well made and is working well. The amplifier immeadiatly recognized the external source. I then hooked up my Oscilloscope, Frequency Counter and Signal generator external time base inputs to 3 separate outputs on the distribution amplifier. All work well, and I now have accurate 10 MHz 5X 10e or better for my lab. Very happy with the instrument.

The OCXO is excellent. It initially drifted 10ppb the first few days after warmup.

10 MHz Distribution Amplifiers

I recalibrated after 1 week of thermal stability and continual power. The unit drifted less than 1ppb. High quality circuit boards and great construction. I have 2 units, both are great. Cable connections are very close together. Very difficult for old, fat, clumsy fingers to attach cables. Q:this is a frequency distribution amplifiler and a OCXO frequency standard. Q:adjust inside OCXO frequency. So so performance Nice clean sine wave.

Works as described. Good buy but difficult to connect. Frequency Band VHF. Vintage Tube Output Transformer.Recommend a 10MHz distribution amplifier? Posted: Feb Tue 07, am. I have several devices which will take an external reference and was wondering if anyone here had a recommendation about a distribution amplifier to send the timing signal to them all.

Just about any standard def, baseband analog video distribution amplifier intended for pro or broadcast use will easily go out to MHz. The analog high def ones were good for about MHz in their Y or G channels. Posted: Feb Tue 07, pm. See this topic for pictures and other details SwB09YEMWZ Depending on whether your standard inputs on your gear are true 50 ohms or high impedance you can usually use a tee and just daisy chain your signal to each.

We do this at my work quite a bit and the equipment will indicate whether its locking to the standard or not.

Another option is an N-way power splitter. Posted: Feb Wed 08, am. What level? Stridsberg MCAM. Multicouplers - General Description The fundamental application of the receiver multicoupler is to enable multiple radio receivers, spectrum analyzers or scanners, to share a common antenna system. Isolation will reduce the possibility of RF interaction between receivers caused by local oscillators, synthesizers, etc. If an external pre-amplifier, receive filter or lightning protection device is used, only one is needed to service several receivers.

Both Passive and Active broad-band models as well as narrow-band specialty couplers are manufactured with premier components to meet a multitude of VLF to UHF monitoring applications. Standard port configurations from 2 up to 8 are available. These units are designed to meet most government, military and commercial radio monitoring demands. Active models include broad-band low-noise amplifiers, front-end protection, and, depending on model, input High-Pass or Low-Pass Filters.

Please contact factory for options. I'm going with the video distribution amplifier, I'm sure that'll be just fine.The DAs have been waiting to be repurposed for something useful. Having a 10 MHz reference in the lab is a good start. But if you have to feed more than one device with the 10 MHz reference signal, some means of distributing the 10 MHz reference signal is needed.

The quickest and cheapest approach is just to daisy chain all instruments using BNC T-connectors. This method can cause rapid signal degradation due to mismatches and reflections rather quickly. The cleaner but still pretty inexpensive approach is to use a simple RF splitter.

Unfortunately, this may not work for too many devices as the signal level might dip below the needed value for each instrument. The best approach is to use a professional distribution amplifier to isolate the reference input ports of the instruments and to provide a consistent amplitude.

The only real catch is that they are designed for an impedance of 75 Ohms, a common value for video systems.

10mhz distribution amplifier

But there are some ways around it, more about that later. Two looped-through inputs allow multiple of these amplifiers to be daisy chained together. The gain can be adjusted from the front using a small screwdriver.

Some models of the VDA have signal taps on the front-panel to check both the input and output signal for quality. This comes as no surprise as professional broadcast equipment is usually designed this way. There are 6 x 75 Ohm output resistors, R24 through R Since they are responsible for setting the output impedance, simply replacing them with 50 Ohm or Please note that the input ports are high-impedance ports, NOT 75 Ohms.

One can either leave it as it is and accept an impedance mismatch or — the way I did it — solder a 75 Ohm shunt resistor across the input port. This modification is not pictured as I took the pictures for illustration purposes much later from a second VDAA. One important thing to know is that most analog video DAs do not have the bandwidth to carry a 10 MHz square wave signal.

Only sine wave signals are suitable for this setup. In case you are using a reference that puts out a square wave, you need to convert it to a sine wave. This can be done by using an inline low pass or band pass filter. For my setup I decided to leave the output ports at 75 Ohms impedance.

Because I had tons of high quality 75 Ohm impedance cable left over from a former broadcast transmitter side. But if you are on a tight budget I suggest you replace the output resistors R24 through R31 instead and run 50 Ohm impedance coax to your equipment. Note that some instruments have a 10 MHz input and 10 MHz output port. For professional equipment, the 10 MHz output is often a buffered output of the 10 MHz input.

The cable on the right side is a professional 75 Ohm impedance coax cable used in broadcast TV installations. Recycling these high-quality cable leftovers saved me lots of time that I would otherwise have to spend crimping new cables. It was a perfect job for 25 mm x M3 standoffs and a bit of epoxy glue. To get the dimensions just right, I mounted the FireFly-IIA with M3 nuts on the standoffs, applied epoxy glue very liberally to the standoffs and let it sit overnight.

Before I glued everything in place I used some sandpaper to roughen the surface up and provide a better grip for the epoxy glue. It worked very well and the installation was surprisingly tough. My final setup is pictured above.Welcome, Guest. Please login or register.

10 MHz Distribution Amplifiers

Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search. I've looked online at various designs and this one by Brian Dorey seems well thought out with a front end filter to remove harmonics plus sine and square wave outputs. So the questions are: 1. What are the needs input-wise of the range of test gear that has 10 MHz external inputs and would the design above cover most stuff?

Does something like this already exist that covers my requirement? I'll share any design I come up with on the forum. I'd like to make the world a better place but they won't give me the source code. Brian Dorey's design looks nice but it may be a little under-powered for some instruments. For example my TTi TF counter requires 1Vrms for its external reference input which I find a constant source of annoyance as most other systems will make do with less.

But it may be worthwhile checking your instruments. The other option is to daisy chain as most instruments have a reference out as well as a reference in but then you need to have them on all the time and noise may be added. Video distribution amplifiers are probably the easiest thing to use.

AC coupled in most cases, and with enough gain to give a usable output for almost all equipment as it has to drive more than 1V into 75R for video in any case, and generally will work up to around 14MHz without issue. If I ever get something that needs it I already have a 30 output video amplifier with modules from Opamp Labs doing all the work, including power supply, each in an octal plug in module. Quote from: SeanB on March 17,pm.

Shock Super Contributor Posts: Country:.

10mhz distribution amplifier

I expect supply far outstrips demand. The ADA 4 model has plenty of outputs as well. The following users thanked this post: bitseekerFrankE. Harb Regular Contributor Posts: Country:. I just used a VDA Quote from: Harb on March 18,am. The input is a high impedance loop, so a 50Ohm term is all that's needed on the input. It's a bit of a pain to get higher power output out of these things, since the power requirements means you likely have to go to single amps per package, but up to about 1Vpp, you can use quad opamps.

This has been enough for my externally referenced stuff. Thanks, I'll check that out although I'm going to have to install Circuitmaker to look at the schematic. Any chance of a. This driver IC is actually the same one used by Brian Dorey's design. So maybe I need to put some kind of front end in front of it and it would be neat to allow for an adjustment so that different levels of input can be catered for.

Any thoughts?


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