Batboard

ldanna

Voila we have lift off. After spending way too long down the rabbit hole. I took another path. The PA not making any power should have clued me in but being an old dog it's hard to learn new tricks. So I started checking the driver PA and found it had a bad transistor. I simply swapped Driver boards...

ldanna

No indication of it even trying to make power , even with PA test set to on . More testing I thought I would check the Analog Mux U4104 which gets the swr info. the forward voltage to it is fine and the reflected voltage is identical with the good and bad PA modules so I was looking to see if u4104 ...

ldanna

OK here is an update to boggle the minds out there. I swapped the SWR and circulator from a good unit. Same hi internal SWR error. I then put the Circulator and SWR board from the bad PA into the good PA . The good PA still works fine, concluding the circulator and the SWR boards are not the problem...

ldanna

Thanks for the reply . I un soldered the circulator pins and placed a jumper from the PA output board to the N connector. I will try and replace the circulator from a good unit to test to see if the circulator is defective.. what fails in the circulator I am curious as I have not seen that before. R...

ldanna

Been working on quantars for our Amateur radio repeaters. I am having a problem with 2 Quantar PA modules. One of my Repeaters showed no power out. Replaced the PA it works fine now. I took the bad PA home and fired it up in my test frame. Sure enough no output. On the RSS metering page it showed hi...

ldanna

tried several scm older with on board chips and newer with firmware on SIMM and none showed a wireline installed. Curious all showed the V.24 installed . Is there a listing showing the various PS wireline firmware and the associated SCM firmware that it works with? is there a diagnostic check to ide...

ldanna

interesting so I'll look for an earlier SCM to see if that makes a difference . I assume that the scm for am AstroTac RX is workable in a BAse station I may have an earlier base I can swap the SCM with. What do you think

Larry

ldanna

OK here is an update, I looked at 2 PS/Wireline cards for the AstroTac Rx. PS1 is a CLN 6959B32 (working PS) PS 2 is a CLN 6959A47 (not working PS) As an experiment thinking there is a firmware issue I swapped the firmware between the 2 units . Result both PS won't work. I swapped back and the origi...

ldanna

Hi Group, I've been working on interfacing an AstroTac Receiver to an ATAC 3000 comparator. for P25 Digital. Reading the Codeplug it shows the unit is a Quantar Satellite Receiver not an Astrotac Receiver. (curious) The problem is that it seems the unit thinks there is no wireline installed. Wirelin...

ldanna

Hello group, I've been working to use an astrotac 3000 comparator in an Amateur radio mixed mode repeater system. I got it working OK so far but I would like to be able to extract live info and control from the comparator. In research I found third party products that are used to monitor and control...

ldanna

Well after a bit of more research and the S record suggestion we have success. I had a 438-470 radio and read that s record and had it pushed it into the 450-482 radio in question. Voila full p25 deviation back, in fact a bit high. only problem now is to find a 438 radio with a W4 W5 or W7 head conf...

ldanna

Hi group, I have a UHF Astro Spectra . Recently setup for a local ham repeater with P25 mixed mode capability. This radio appears to deviate FM Properly but P25 is low, very low about .5 Khz another radio shows about 3 Khz.and can access repeater. used astro tuner to set deviation but no improvement...

ldanna

Thanks for the reply,
the link got me thinking and I went back to the setup of the codeplug.
I did miss a setting in the wireline astro tab which had a setting for turning RT RT on . I enabled that setting and now the 2 radios talk fine so far

Thanks again for the group

Larry

ldanna

Question , I would like to setup 2 Quantars back to back to link to another repeater. Manual shows the RA/RT analog configuration but I want to link digital so both repeaters can run Mixed mode and be connected. So far I have 2 Quantars on the bench both setup as repeaters running Mixed mode. the 2 ...

ldanna

additional info: notch freq is indeed centered at 1Khz

ldanna

Hi Group, For all the Quantar gurus out there , I am working on my Amateur repeater system. Currently testing 3 Quantar base stations in mixed mode operation all tied together with an AstroTac 3000 comparator. All seems just fine, P25 and analog all repeat . I came across this anomaly. When setting ...

ldanna

No clickety clack but does vote analog amd digital
Larry

ldanna

Hmmm ip transport would be nice but not feaseable yet problem with either getting internet or not being able to install an antenna

Will work on it i suspected that was the case
Anyway i am learning more as this project progressess

Thanks

ldanna

I have a followup question about the analog and digital voting. In my configuration all of my links are Quantar repeaters at each receiver location and relay back to a central point via RF where the comparator lives. No Astro modems in between. So my question has to do with how the comparator determ...

ldanna

Got it

Thanks
Larry

ldanna

Group was great on a previous issue, now I have another head scratcher. I've been running a UHF Quantar repeater for almost 2 years with no problems. Now I have no repeat audio. Quantar is configured as a base with an external controller. Rx feeds the controller and the output of the controller feed...

ldanna

That answers some questions. I noticed the 1K tone even though I turned off the 2175 . Thanks for the info.

Larry

ldanna

Yes I had to cheat the Quantar to get the level up. Now 3 Khz in gives about 3.5 khz out of the quantar. It allows just a bit of compression of the analog signal. Also it is correct that the AstroTac doesn't use the 2175 status tone from the Rx's so far I am experiencing the V.24 digital link is nec...

ldanna

I thought so too so i programmed the 2175 tone same behavior. Also looking closer i missed ihe / on the led silk screen i thought it was indicating the rx and tx was disabled , not so. The leds indicate a rx signsl present and it was on transmit mode. Need better glasses Problem appears with loss of...

ldanna

Next Problem Help Needed. I changed the AstroTac 3000 to hybrid mode. Digital voting still works. When I test analog I am having a problem. With the repeater reset the first analog transmission is OK but the voter shows TX disable and a Rx disable LEDs but still votes and repeats to the Tx. after th...

ldanna

UPDATE, Well we are on the way to success. Thanks to all for the great information. In the end several items were mis-configured. the S101 S102 switches were critical I found dip 1 off 2 on 3 & 4 off was the combination that worked on all V.24 boards including the AstroTac. crossover cable also ...

ldanna

Update Here is something quirky to add On one of my systems I run P25NX. The quantar in that system connects to a Cisco router via the Quantar's V.24 connection. I moved that router connection from the quantar to the Astrotac and it appears to establish a link on the port 3 where the quantar failed ...

ldanna

Hi Group, I am working on configuring an Astrotac 3000 comparator for use on an Amateur Radio repeater system which we are converting to P25. I cannot seem to get a V.24 link from either a receiver or base station working on ports 3 thru 10 Ports 1 and 2 on wire-line card next to the control board s...

ldanna

Hi group I am working on a project that links quantar P25 repeaters over internet . Project is P25nx. (P25nx.com if interested at looking at the web page) I have 2 Quantars one is a VHF other is UHF The UHF Quantar wireline card had the V.24 daughter board originally I believe at sometime, as it has...

ldanna

Worked great now on to getting it working Thanks a lot
LArry

ldanna

I have a Nucleus SCM board bought from Ebay Passcode has been changed from default . anyone know how to do a reset to gain access again

Thanks

LARRY

ldanna

Update again. Got new U306 chips in from Digikey. Replaced chip in non working board and still no audio. Found partial schematics for SCM board and checked for audio at U 311 If I remember the number correctly ( the Soft Pot chip ) that feeds the VCO and Ref modulation to the exciter. I could see a ...

ldanna

Update: Ordered new chips for U 306 waiting for them to arrive

LArry

ldanna

OK I got the other Quantro from a friend coursly enough same Firmware revision as mine . his unit had audio but very low almost nill but I could discern some audio. Of course my boards did not work at all. I am on board with the U306 diagnosis. I will order some chips to try it out. The board has th...

ldanna

PN is TTN4094 B 03 CA11YH9. firmware is on 4 32 pin chips on main board Where is the backplane ID located I could not find it . the chassis label notes on one Professional receiver 5N77 but I have another gold chassis which the label says Professional Transceiver 5N77. Putting the non working board ...

ldanna

I did copy down the firmware and was able retrieve i. t here it is. Backplane info this evening. Firmware is out of date for this system but they do match up. SCM: 16.06.018 WL: 16.06.013 EXC: 13.05.002 SCM: U651 5191020L05 U652 5191020L06 U653 5191020L07 U654 5191020L08 WL: U134 5191013H70 U135 519...

ldanna

Am at work so ll check the numbers this evening. The TX is 403-433 R1 . I am seting it up to TX in the 425Mhz portion of the amateur band That should not be out of band for this split I believe or did Motorola do some thing weird? My goal is 4 repeaters all recieving 0n 444 and transmiting on 425 as...

ldanna

Update. Tried a 4th SCM from yet another receiver. Same results can't believe the problem is with the chip, not in 4 boards. I tried to do an alignment. reference modulation, no modulation square wave. Tried to do deviation alignment no audio either . Both parameters good on my working SCM. is there...

ldanna

Another note Local audio from a Mic also showed no audio

LArry

ldanna

Well I am using an origional chassis with the origional SCM, Pwr supply, Wireline and receiver just as it came from the factory. We were given 6 of these satellite receivers. I added an exceiter, power amp, and replacd the power supply to handle the extra power needed for the system. Then reprogramm...

ldanna

Il try swapping the U306b chip to see if that works
Ive gotten the audio back by swapping SCM boards but cannot get the origional board to work
Problem looks like a SCM board issue. Tried other firmware with same dissapointing results

Larry

ldanna

are the features programmed into the 4 chips u651 - u 654? on older boards or the SIMM on newer boards or in another chip maybe the Codeplug? Very confusing

ldanna

Is it possible to add it after the fact?

Larry

ldanna

My radio club was donated several Quantar satellite receivers . these appear as a regular Quantar chassis with a receiver, wireline card and a low power power supply. I reasoned I could add the higher power supply an exciter and power amp and voila a quantar repeater. Well all seamed OK The unit was...

ldanna

Is it possible and what mods are necessary to swap a basic 2 number XPR 4350 display head to an alpha display say from an XPR 4550 Or am I barking up a wrong tree

Thanks

Larry

ldanna

Is it possible and what mods are necessary to swap a basic 2 number XPR 4350 display head to an alpha display say from an XPR 4550 Or am I barking up a wrong tree

Thanks

LArry

ldanna

Hi Group, I just picked up a Quantar uhf PA R0 It will go up to 433. OK Now I have an exciter that is R1. The unit wont work because of the mismatch So I need to modify the resister prom which determines the info for the module.Does any one have more specific info on this resister prom and what need...

ldanna

Hi group, just got donated quantro for our repeater group. Quantro functions as a stand alone repeater . I need to interface it to an exteernal controller to add additional links . So I need to locate COR PTT and audio reccive and Audio transmit. The problem is I need RX audio before de emphasis and...

ldanna

Update. Appears that the remote cable was a problem. Not sure it was the correct cable . no numbers on it only the Motorola name embossed on the molded plugs. the db25 male and female were wired straight thru but only about 8 inches between them. the long leg of the cable went to the "accessory...

ldanna

Not sure how to post the image haven't done it before. Short how to appreciated

Larry

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