griffonsystems 0 Posted October 16, 2007 i know pelco makes a 16channel data dist unit that amps or cleans the data signal strenght to all ptz's connected but i am looking for a cheap solution to a ptz problem im having with my dvr for 4 cameras. using spectra iiis and a kbd300a keyboard, actually 2 keyboards and the dvr to control 4 ptzs i think the answer to my problem is to amp the signal from the dvr.. any suggestions?? Share this post Link to post Share on other sites
CollinR 0 Posted October 16, 2007 How much distance and what kind of wire? Is it properly terminated? Can you repull the wire? Share this post Link to post Share on other sites
HighSpeedLowDrag 0 Posted October 16, 2007 16 channel amp I assume you must be talking about the CM9760-CDU-T. There may be a small signal distribution amplifier from Sennetech. Look into the SDA1X5-422. Sennetech is never cheap though. Your only other option for PTZ rs422 wiring is to Daisy Chain the wiring. Home running of data from spectra cams sometimes works and sometimes does not. It is a hit and miss. Its always better to do it the right way first. As for your multiple controllers you may want to research into Pelco's CM9760-DMR. This device will handle up to four controller devices speaking the same protocol to one output port. Your two KBD300A keyboards will require the KBDKIT each to power them. You can probably go to a local electronics store and pick up a power supply and wall jack for your keyboards but stick with the KBDKIT. It has the right power supply and correct wall jack to use. Hope this helps...... Share this post Link to post Share on other sites
griffonsystems 0 Posted October 17, 2007 2 of the distances are roughly 150ft and the other 2 are 50ft... both kbd300a work fine - they are all homerun tho,, the wire is 18g and 22g -- im going to switch out the dvr ptz card to a brand new one and start over.. will look into the wiring as well if needed... and ill check out the above product thanks for the help pg Share this post Link to post Share on other sites
survtech 0 Posted October 17, 2007 Are you trying to combine control signals from 3 different controllers or control 4 different PTZ'z? For an inexpensive alternative to the Pelco CDU-T for the latter, try the Kalatel KTD-83 by GE. It costs around $130 and can feed 5 independent buffered data lines. They also make a KTD83-16 that has 16 output ports and is much cheaper than the Pelco CDU-T. Also, you can daisy-chain as many PTZ's as you want (up to the maximum number of addresses allowed by the PTZ code) if you turn off the termination on all but the last one in the chain. To daisy-chain PTZ's, you can run up to 3ft. stubs off a main control line or bring the data line into and back out of each PTZ to the next one in line. If you use shielded control cable, make sure to tie the shields together and insulate them at each splice. You should only connect one end of the shield to ground, usually at the control end. Leave the other end disconnected. Share this post Link to post Share on other sites
griffonsystems 0 Posted October 17, 2007 that kalatel device looks like it might work... i have 3 control devices (one kbd300a upstairs in an office, one kbd300a dowstairs, and one dvr upstairs) i have 4 spec3s that need to be controlled by each controller. each of the spec 3s come into the upstairs office homerun on 18/2 and 22/2 data wire... at one point in time all controllers controlled the ptz, but then the dvr stopped... figured the ptz card burned out so switched that one but no luck... ive seen this problem before and it was solved with the pelco data dist device so was lookign for a cheaper alternative.. i feel like the signal is weak coming from the dvr control card since its the only one thats not able to control all 4.. if i connect 2 its fine but when i add the 3 and 4 then none move Share this post Link to post Share on other sites
survtech 0 Posted October 17, 2007 Are you daisy-chaining the 4 or home running each back to the control points? If each is home runned, the KTD-83 will do the job. We have approximately 140 PTZ's attached to multiple ports on a Pelco CC1. Each port has a single data cable running to a KTD-83 co-located with the camera power supplies at common points in the casino. We split off and daisy-chain up to 3 PTZ's from each data output port on a KTD-83 and it works like a charm. But I would be careful tying multiple controllers to the same data line(s). Dallmeier had a problem with their single-channel-per-blade server DVR because each blade was designed to control one PTZ. This required each PTZ's control line to be home-run back to the blade. Most casinos aren't designed that way. Like us, they use data distribution units and daisy-chaining to limit the number of cables going in and out of the equipment room. I'm not sure how, or even if, they have since solved the problem but I know that at another casino they did wind up home-running each PTZ's control line, at great expense in time and money. If they could have just tied multiple control ports together to control multiple PTZ's on the same data line, I'm sure they would have. Share this post Link to post Share on other sites
griffonsystems 0 Posted November 5, 2007 installed the kalatel device today,, fixed the problems... ge was sort of a pain to work with tho... they had to send the unit to my dist and not direct to me or they would charge tax, bizzare but i got it thanks for the help! Share this post Link to post Share on other sites
