Batboard

515

I'd try and use Motorola's "standard" IP scheme, so use 10.101.1.201 for PSC1, and 10.101.1.202 for PSC2. The channels would be 10.101.1.1 for channel 1, 10.101.1.2 for channel 2, and so on... Network mask for everything should be 255.255.255.0. Also, make sure you have the box numbers set...

515

That's what I was afraid of. Thanks for confirming that, though.

515

Does a SLR5700 GPIO pin programmed to the PL/Talkgroup Detect function do anything in the digital mode? I tried it with one here running R02.07.00.04, and wired a 2k ohm resistor between the GPIO pin and ground (since it's an open collector output), and only see a logic state change in the analog mo...

515

You'll probably need multi-key capability. From what I remember, the consoles and subscriber radios would use a different key when the talkgroup is patched to another. Look in the APX CPS under the trunking system's "Secure/Multikey" section down at the bottom of the trunking system's page...

515

These are what we have been looking at:
http://www.tccomm.com/FiberOpticProduct ... tact-to-IP

Haven't tried them yet, though...

515

It's actually the "Astro modem" that sends both P25 and analog traffic down the same 4-wire interface. The DIU only does the vocoding, converting analog audio to/from a tone remote or locally connected console into the P25 IMBE/AMBE format and adding the necessary information to make full ...

515

I'm aware of the T2003A upgrade kit consisting of the exciter, receiver, control module, and front panel. But I'm not clear on which PA's are compatible with TRBO. Can the X540 MTR2000 100 watt UHF PA work with TRBO when the T2003A upgrade kit is used, or does it need to be an X340MT PA? It's the 43...

515

No, the UCM used in mobile and portable radios is completely different that the DIU encryption cards. The DIU encryption card is unique to the DIU, and not found in any other equipment.

Yes, the DIU can do AES if equipped with the appropriate encryption card.

515

I've never used a 3550R, but I would try and set it for measuring "peak" deviation with the IF bandwidth set between 60 kHz and 100 kHz for the deviation measurements.

515

So you've never had them shut down prematurely like a few others on here have reported? What charger do you use with them?

515

Those Futurecom DVRS units can vary quite a bit, as they are pretty much designed for a customer's specified frequency configuration. They often include filters to prevent the mobile radio and mobile repeater from de-sensing each other, so purchasing a used one would be risky. The filters might not ...

515

Good to know. Thanks for the update.

Anyone else buy one of those short Power Products or CutRate Li-Ion batteries recently? Do they ever "shut down" prematurely, or did sjxts3000 just happen to get a bad one?

515

So did you send it back and get a replacement M344L1-D, or go with something else? I'd like that really short one, but if they're likely to have that early shut down issue, maybe this one would be better: http://www.tac1comms.com/honeywell-h8818-li-battery-replacement-1950mah-li-ion-64509-p.html?UMP...

515

I used a Prolific USB to serial adapter with a Win XP Pro laptop, and it worked great for years. Then I lost the adapter, but had a similar one (also Prolific chipset) lying around that I thought I'd use instead. This new one is made by ATEN, and of course asks for a new driver when it's plugged in....

515

The DIU does output the talkgroup, unit ID, and emergency status via the "Centracom Signalling Link", which is a subset of pins on one of the DB-25's on the back. It's 9600 baud asynchronous data, but the protocol/format is proprietary. If I remember right, it periodically sends a byte or ...

515

If the morse tone frequency is close enough to those used by MDC-1200 signalling (1200 or 1800 Hz), the radio may be fooled into thinking it's an MDC-1200 message, and trying to mute it. If you have MDC-1200 signalling enabled on that personality, you might try disabling the Data Operated Squelch or...

515

I hear that europe has figured out a way to use the second receiver slot to hear the other P25 transmit channels. On channel linking. As long as each station can hear each other. I've never tried the second receiver in a Quantar, but I'd think you'd be limited to linking to just one other repeater ...

515

Thanks for the tips... I'm thinking something mounted to the rail is the way to go. The top of the rail on the back is about 11.5' off the ground when it's on the truck, so I still want to try and get a quarter wave VHF on there. Maybe I could add some groundplane radials to it, since I don't plan o...

515

Finally picked up a camper... Now just trying to figure out where the best place to mount an NMO would be... The roof is a rubber membrane of some kind, so I really don't want to drill into that. I'd like to run a VHF quarterwave, as it's plenty tall already and I'm sure I'll be hitting plenty of tr...

515

It should work fine, assuming the sites are within range of each other. No need for a UHF duplexer at the VHF mountain site--just set the UHF Quantar for BASE operation and use a T/R relay. In fact, if the UHF Quantar there was full duplex, you'd have to set your wireline priorities or wildcard func...

515

That will probably do the trick! Thanks!

515

I'm considering obtaining a slide-in camper for my truck. Most of these have the bed that goes over the cab, which wouldn't work with the VHF NMO antenna I have mounted on the center of the roof. Since the camper would only be on the truck when needed, I'm thinking about ways to temporarily move the...

515

The newer EF Johnson 5100 portables with the newer firmware should be able to send the digital DTMF packets. Unfortunately, I don't know which versions are required. The newer 5300 mobiles might do it, too. I seem to remember Midland's P25 radios offering some P25 digital DTMF capability, maybe even...

515

Has anyone bought one of those cheap ebay battery eliminators with the cigarette lighter plug for the Astro Saber? I'd like to get one, but it would be great to know if someone knows of one that is confirmed to work well with the radio. A lot of them look like bottom dollar china junk, but I'm hopin...

515

I had a similar issue with an MC1000 tone remote deskset a an Astro Consolette a while back. These desksets have an "audio squelch" of sorts that's supposed to mute any faint hum or hiss that might be on the line when no traffic is being received. When the audio coming in to the deskset is...

515

This utility works good for finding out the timeslot, color code and talkgroup info, and determining if they use encryption (privacy) or not: https://github.com/IanWraith/DMRDecode All you need is an analog receiver with a discriminator tap. Feed that discriminator audio to your PC's sound card line...

515

They're not really cheap, but they are secure, and worked great with the Quantar's RSS port:
http://www.digi.com/products/wireless-m ... d#overview

The Quantar's RSS port is 9600 bps, async.

515

Thanks for the info... I knew I wouldn't be able to use all 4 GB, but thought that at least 3 GB would be useable. So, it looks like I have these options: Buy another 1 GB to fill the two empty slots on the motherboard, but I think the new RAM will run at 400 MHz to match the existing modules Replac...

515

I've got a 3.0 GHz Pentium 4 with 1GB DDR2 400 MHz RAM, with a PCI Express x16 Sapphire Radeon X300SE video card with 128 MB on it. It runs XP Pro from an SATA hard drive. It's worked great for years, but since my CRT monitor died and had to be replaced by a widescreen LCD, it's performance isn't wh...

515

MotoFAN wrote:Is it true, that this Astro Saber (I mean AS with 9600 @ 800 MHz) requires some special version of CPS?

No, regular CPS will work. The features that aren't supported (like MDC1200) are just grayed out, if I remember right.

515

I posted the cable pinout to go from the DIU's COMM connector (DB-25) to the Quantar here:
http://batboard.batlabs.com/viewtopic.p ... 99#p244499

515

I'm not aware of the RCH3000 or MC3000 desksets being available in tone or local control format. All the ones I've ever used have used the SB9600 data to display the channel names and emulate full W9 control head functionality at the deskset. The MC1000 and MC2000's are tone remotes which look simil...

515

Even though the RCH3000 or MC3000 desksets use CAT-5 cable, they're not ethernet devices. All 8 wires on the cable are used, one pair for audio in each direction, and one pair for control data in each direction. So typical ethernet bridges or media converters won't do any good.

515

The Quantar will need an optional V.24 card if it doesn't have one already. This will put two RJ-45 jacks on the front of the Quantar. That "Quad Connector" or whatever they call it with the 4 RJ-45 jacks that goes on the back of the DIU's COMM DB-25. A straight through cable can be connec...

515

I think around 20 watts is as low as they go. I don't think you'll have any problems running it there.

515

Looking at the manual, it mentions that Telco connector pins 18 & 43 can be used as relay closure output for "Carrier Indication". That is, you should see continuity between 18 and 43 when the station receives a valid signal. From what I remember, the default wildcard configuration tri...

515

It sounds like there's more latency than normal going through the repeater. Are you doing anything out of the ordinary with the wireline interface, or some kind of external controller? If it was a voted system and the links had excessive latency, you'd probably see the symptoms you're describing. If...

515

I'd imagine the 800 MHz units are similar, but here's what I've seen on a VHF station with the 125 watt PA: When running from a 24 VDC source: 1.36 amps with TX off and RX squelched, 8.66 amps when transmitting 65 watts, and 10.9 amps when transmitting 100 watts When running from the 120 VAC source:...

515

The Astro Modems are 9600 bps, so the should work on most voice grade circuits. Are you sure the modem inputs/outputs are wired correctly? That is, the modem output of one station is wired to the modem input of the comparator? Here's a pic of the back of the comparator, with some of the wiring label...

515

That talkgroup 65535 is reserved as the hear-all, call-all, talkgroup for P25 conventional. It has nothing to do with P25 trunking. To use it, you need to set up all radios in the fleet to use conventional talkgroups. This is done by checking the "Talkgroup" box under the Conventional Pers...

515

I just wiped and re-installed XP one more time, this time not installing SP3 or any other Windows updates, and the problem is still there. I did notice the problem going from the Toughbook to the desktop PC, so it looks like it can occur both ways. I guess it has to be some kind of hardware problem....

515

I finally got a chance to wipe and re-install XP, and the same problem is still there! It is plugged in most of the time. All of the above tests were done with it plugged in to power. I think the battery is in pretty good shape. I didn't think to test it right after the XP install, and instead conne...

515

140mA is what I measured on the red XTL5000 O5 control head wire, but it was in a squelched/muted or low volume state. As Jim stated, if the audio amp is in the control head, I would expect it to go up to an amp or two at higher volumes.

515

Well, I just found a PCMCIA serial port card and installed it, and it has the same problem too! I guess a reformat and Windows re-install is in order...

515

I played around with them a little more this morning, and made in interesting observation. I think the problem is pretty much independant of baud rate, as I was seeing it even at 300 baud. When I send several 1's, 2,'s and 3's to the Toughbook (1111111111222222222222222222233333333333333...), I see ...

515

I've got a Panasonic Toughbook CF-18 that's never had a problem programming all kinds of radios until recently. Lately, I haven't been able to read any radio via the serial port... It will usually start reading (put the radio into program mode, ect.) but usually fails within a few seconds. I've trie...

515

I think Motorola added that when they made the 403-433 MHz Quantars go down to 380 MHz. I believe tuning the preselector down to 380 makes the screws stick out farther than normal, so that protector was added.

515

I agree that if you have to run mixed mode, the Astro Modems do simplify things as they allow the analog audio to use the same voice circuits as the digital modem data. As d119 said, if the system were digital-only, V.24 with subrate MUX cards is the best way to do it. I'd look into what options you...

515

A system I had been involved with has a total of 12 UHF R1 Quantars all transmitting the Astro Modem data continuously. They are the 125 watt PA's, but the power was set around 30 watts on these links to reduce the amount of heat generated in the comm shelters. As far as I know, there have been no P...

515

I've heard this on UHF stations, too. I know the one I heard it on did have a wireline connection, and that they only use it in the analog mode. I haven't heard it in a long time on that channel, so maybe they resolved it. I don't believe I've ever heard it on stand-alone stations where no wireline ...

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