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If you go with VGA, DVI, HDMI or any other pseudo video
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interface they you must include a video frame buffer, video speed D/A converters and the logic to support it. Even though LCD screens include a memory cell at each pixel it is not useful to you given those interfaces. They scan the video just like the old CRT monitors. You can't beat a PC for cheep high quality video. What is the speed of the old Tek and HP X/Y monitors? Pete. ----- Original Message -----
From: Kuba Ober To: hp_agilent_equipment@... Sent: Thursday, September 01, 2011 5:44 PM Subject: Re: [hp_agilent_equipment] X-Y to VGA/USB converter That's "almost" what we want, but not exactly. It has a fixed 800x600 resolution, and it will look like crap on widescreen monitors. For some reason everyone must be watching movies on their monitors, because non-widescreen aspect ratios are disappearing. I've recently been to a local Microcenter and the best deals were only to be had on widescreen units with ridiculous resolutions (say 1600x1000). I'm thinking of something that would be $100 in parts for a basic version, optimized for use with real instruments not some imaginary specs someone thought up. This means: 1. Input channels with ranges that allow 1:1 connection to a selection of popular instruments (here I need *YOUR* help!). 2. Screen colorization options -- again, based on behavior of real instruments. 3. Use with available and "future-proof" monitors -- that means analog VGA would be one option (solder a DAC), DVI another (solder LVDS drivers). I think that for spectrum analyzers it'd be cool to have an option of double IF inputs and on-board frequency counting to generate an accurate X position and on-screen display/cursors. Again: I need input from *YOU* as all I have is a Tek 7L14 SA plugin. I would need to know what are the output levels, frequency ranges, etc. on IF outputs from various SAs. Obviously the board would have room for various options (VGA output, DVI output, USB output, IF input, etc) and they'd be populated as needed. So a basic version may have USB interface and three 12 bit input channels with 10MHz bandwidth, and nothing else. Since it smells like an FPGA-based solution, it's not unthinkable to have an optional high-resolution (16 bits at 50+ MSps) channel to take video output from SA's and do level measurement and filtering or even swept FFT. This would come at a small incremental hardware cost, but obviously would be very useful. Cheers, Kuba On Sep 1, 2011, at 4:12 PM, W2HX wrote: > Check out vectorVGA Tempest > > > $179. However, some scaling input will be needed. I inquired to this company > about using this for my 8566/68 specans. They have a product called the > VectorVGA PRO which is $2000 and will do what we want out of the box. > However, that's a lot of coin! I sent the XYZ specifications of my specan > to them for comment on the applicability of the "tempest" version (which has > nothing to do with electronic eavesdropping) and this is their response.... |
