Users may not create topics, posts, or private messages containing or relating to the following material (especially pertaining to Motorola copyrighted software, unless you want Motorola to come along and shut this site down):

  • Listing for sale or trade of, or links to sites offering for sale or trade of, or giving away, Radio
    Service Software (RSS) or Customer Programming Software (CPS)
  • Profanity, pornography, defamation, or slanderous remarks directed towards any individual or entity
  • Commercial advertising (except in the Batboard Vendors forum, as approved by the Admin/Mod Staff)
  • Any other items which may be deemed as offensive

If any topics, posts, or private messages containing or relating to the aforementioned material are brought to the attention of the Admin/Mod Staff, they will be deleted.

Additional FAQ items appear here in Forum Rules. Please review them for posting guidelines and further clarification.

Search found 599 matches

by Astro Spectra
Mon Aug 27, 2018 11:59 am
Forum: Vehicle Radio Installs
Topic: Fighting Noise In A 2018 Honda CR-V
Replies: 6
Views: 416

Re: Fighting Noise In A 2018 Honda CR-V

If you did something and the noise went away you need to retrace your steps to discover what changed.

Also a firend found clip on chokes over the injector leads very helpful in fixing his interference issues.
by Astro Spectra
Mon Feb 12, 2018 10:53 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Help Please - XPR8400 Questions About Mixed Mode
Replies: 5
Views: 479

Re: Help Please - XPR8400 Questions About Mixed Mode

Actually AFAIK with dynamic mixed mode IPSC is not supported but RDAC still works.

EDIT: I bought a dynamic mixed mode EID and it was a disappointment, for the money it did not allow IPSC networking.
by Astro Spectra
Fri Feb 09, 2018 10:13 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Help Please - XPR8400 Questions About Mixed Mode
Replies: 5
Views: 479

Re: Help Please - XPR8400 Questions About Mixed Mode

If you plan to network the DMR forget mixed mode.

A work around is to program up two channels, one analog and one digital, and switch it either suing a hard wire to the ACC connector or by using RDAC.
by Astro Spectra
Mon Jan 15, 2018 1:12 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Trbo rptr receive threashold chatter
Replies: 5
Views: 703

Re: Trbo rptr receive threashold chatter

I set the threshold to -45dBm (as high as it will go) because the protection mechanism is wrong. You're supposed to listen before transmission to avoid co-channel but in a two frequency system the repeater receiver is not listening to the transmitter frequency (and can't because of the duplexer) so ...
by Astro Spectra
Mon Jan 08, 2018 8:05 pm
Forum: MotoTRBO Portables and Mobiles (4xxx/6xxx) 1.0 Series Subscribers
Topic: XPR 6550 Multiple Scan Lists
Replies: 2
Views: 411

Re: XPR 6550 Multiple Scan Lists

In other words the scan lists are slaved to a mode.
by Astro Spectra
Mon Jan 01, 2018 8:59 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra 146-174 110w capacitors
Replies: 21
Views: 2240

Re: Spectra 146-174 110w capacitors

My experience is that only a careful visual inspection will tell you if you definitely need to do replacement. Note that the converse is not true, visual inspection will not show you if you don't need replacement.
by Astro Spectra
Mon Jan 01, 2018 8:55 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: XTL5000 P25 and wideband FM (5kHz) and other questions...
Replies: 14
Views: 1300

Re: XTL5000 P25 and wideband FM (5kHz) and other questions...

Gentlemen, it's pretty simple: If you don't have Q507 then there is no restriction. If you do have Q507 and modern firmware then the radio is restricted to 12.5 kHz on frequencies that align to Part 90 (tested on VHF). Even with Q507 and modern firmware, non Part 90 freqs (such as those used by the ...
by Astro Spectra
Fri Dec 29, 2017 12:47 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: First Digital radio question ?
Replies: 4
Views: 668

Re: First Digital radio question ?

Have to admit same deal here, picked up a Whistler TRX-2 simply to assist with setting up radios. Recently did an DMR repeater install for an organization at a site, they then asked for help in coverage tests while we were on they way down from the mountain. However, customer did not know how their ...
by Astro Spectra
Thu Dec 28, 2017 2:12 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: First Digital radio question ?
Replies: 4
Views: 668

Re: First Digital radio question ?

Bill_G wrote:I just bought a scanner that does v.kitchensink protocols....


Shiowing your age Bill, these days it would be #kitchensink ... blurp errr bleep shhhhhh

For those too young to remember or for a nostalgia hit visit:

https://www.dialupsound.com/

With the sound on :)
by Astro Spectra
Thu Dec 28, 2017 1:06 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Impres multi unit charger conversion question
Replies: 1
Views: 646

Re: Impres multi unit charger conversion question

As a field expedient I've used folded cardboard and a handkerchief. While the MUC is handy it's, as you say, too expensive for conversion of more than a pocket or two.

As for a wholesale remplacement the only option I could suggest is 3D printed MUC work alike from a maker bot specialist.
by Astro Spectra
Fri Dec 15, 2017 12:30 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X Low Band Wide Band Antenna Coils
Replies: 4
Views: 806

Re: Syntor X Low Band Wide Band Antenna Coils

Looking at the design in your second picture it's rather like the circuit used for two frequency low band short whip operation published in one of the old ARRL handbooks.
by Astro Spectra
Fri Dec 15, 2017 12:24 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: AMTS 217 band reallocation issues
Replies: 11
Views: 815

Re: AMTS 217 band reallocation issues

Hi Bill, interested in your observations can you post more? Are the medical devices Part 15? The 'interferers' Part 80?
by Astro Spectra
Fri Dec 08, 2017 1:28 pm
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: XPR7550 RF adapter
Replies: 17
Views: 1346

Re: XPR7550 RF adapter

3.4mm OD on the socket.
by Astro Spectra
Fri Dec 08, 2017 11:47 am
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: XPR7550 RF adapter
Replies: 17
Views: 1346

Re: XPR7550 RF adapter

I think it's possible that the coax insert used in DIN41612 connectors might just fit. On the left here: https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQ0O-_VnxWIi_UjP-ITYeVjPEEELqqSZrqBoAS65yi7JQw_BCoGVnsko9UK The ID of the inner bifurcated section is 4.2mm. But could be gently squeezed tigh...
by Astro Spectra
Mon Dec 04, 2017 12:16 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: VHF Quantar Duplexer 600KHz?
Replies: 7
Views: 730

Re: VHF Quantar Duplexer 600KHz?

There is a notch set by the a small tuning cap but from memory it's shallow at only 30 to 40 dB at the narrow splits, deeper at the wide splits. Because the main elements are electrically shortened the notch performance is not great.
by Astro Spectra
Sat Dec 02, 2017 9:54 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: VHF Quantar Duplexer 600KHz?
Replies: 7
Views: 730

Re: VHF Quantar Duplexer 600kHz?

Hi escomm, that set of cans has a minimum t to r split of about 1.2 MHz. It's a bandpass-bandpass design. At the narrowest spacing the pass band is about 100 kHz aside , meaning the width of the high and low pass bands. It's not big enough really for the ham split, you need something with 'more can'...
by Astro Spectra
Sat Dec 02, 2017 9:41 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: GTR 8000 Feature Update & New Voting Comparator!
Replies: 22
Views: 3244

Re: GTR 8000 Feature Update & New Voting Comparator!

I've been told the front port is special as there is a DHCP server running to support connection of laptops w/o the need for a fixed address.

Also your comments re RT-RT mode, I expect you mentioned to say "without an AstroTAC"?
by Astro Spectra
Tue Nov 28, 2017 12:46 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: SLR5700 repeaters with IP switch
Replies: 3
Views: 483

Re: SLR5700 repeaters with IP switch

Why do you think it's not IPSC?
by Astro Spectra
Sun Nov 19, 2017 5:13 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Astro, duel radio option?
Replies: 12
Views: 1462

Re: Spectra Astro, duel radio option?

escomm wrote:Yes, it uses a special W3 HHCH and is well-discussed here. Feel free to search


As per escomm's response, it can only be done with W3 HHCH and special software and some cables. Basically it's a no.
by Astro Spectra
Thu Nov 16, 2017 10:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Astro, duel radio option?
Replies: 12
Views: 1462

Re: Spectra Astro, duel radio option?

Yes, I often find my Astro units having a go at each other:

Image
by Astro Spectra
Thu Nov 02, 2017 9:55 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: XPR and Beach Problems
Replies: 12
Views: 928

Re: XPR and Beach Problems

If A/C is not an option then passive measures like sun shields might work. These are usually stainless steel sheets spaced an inch and a half away from the outside surfaces of the cabinet. These reflect the sun and promote convection drafts. Here's an example: https://www.delvallebox.com/en/outdoor-...
by Astro Spectra
Tue Oct 31, 2017 7:20 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: XPR and Beach Problems
Replies: 12
Views: 928

Re: XPR and Beach Problems

Sheesh, in Arizona even traffic light controllers get A/C.
by Astro Spectra
Mon Oct 30, 2017 11:12 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: XPR and Beach Problems
Replies: 12
Views: 928

Re: XPR and Beach Problems

com501 wrote:...install a heat-exchange HVAC ... The cabinet was airtight.


+1 Only solution for coastal installs.
by Astro Spectra
Sat Oct 14, 2017 10:12 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: SLR8000 Status led solid red
Replies: 2
Views: 410

Re: SLR8000 Status led solid red

Just speculation but if it was trying to actually transmit on 136 MHz into a frequency selective combiner or duplexer then the PA probably got very upset with the high reverse power. RDAC is strange, it doesn't read logs from machines unless asked to. Generally with logs the first fault is usually w...
by Astro Spectra
Sat Oct 14, 2017 10:05 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: SLR Repeaters
Replies: 7
Views: 802

Re: SLR Repeaters

I believe so but the experience I have is in DMR where the only interface used is Ethernet. The BSM is here, the AUX connector starts on page 71: https://www.google.co.nz/url?sa=t&source=web&rct=j&url=http://manuals.repeater-builder.com/mo-files2/-SLR%2520Series/SLR5700%2520Basic%2520Ser...
by Astro Spectra
Fri Oct 13, 2017 9:04 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: SLR Repeaters
Replies: 7
Views: 802

Re: SLR Repeaters

I have a dozen or so '5700 both VHF and UHF to look after, what do you want to know?
by Astro Spectra
Wed Oct 11, 2017 12:32 pm
Forum: ASTRO Experimental - How to do things a little out of the box
Topic: Half-baked: remote control head over Ethernet?
Replies: 14
Views: 5361

Re: Half-baked: remote control head over Ethernet?

Well CNA bus is multi-drop at 1 Mbps over a single twisted pair so unfortunately you do need to interpret the protocol otherwise you don't know if you should be receiving or transmitting. There are commercial CAN bus over Ethernet products like this: http://www.systec-electronic.com/en/products/indu...
by Astro Spectra
Wed Oct 11, 2017 11:45 am
Forum: ASTRO Experimental - How to do things a little out of the box
Topic: Half-baked: remote control head over Ethernet?
Replies: 14
Views: 5361

Re: Half-baked: remote control head over Ethernet?

Major gotchas? Well for the XTL and later radios the audio between the head and body is digital, it's embedded in the CAN bus frames. The CAN bus is only available on the circular blue J300 CAN connectors. There are two so heads can be daisy chained. Motorola makes a 115' extension HKN6165 and I bel...
by Astro Spectra
Tue Sep 05, 2017 11:56 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Coax recommendation portable UHF base station
Replies: 5
Views: 1251

Re: Coax recommendation portable UHF base station

Mechanical ruggedness is much more important than loss for a portable set up. Everything is going to get banged and slammed, so a solid cable is critical. I'd use RG-213. The X30 is not super rugged but OK. I've used them for transportable systems but they're quite narrow band. I had to use a networ...
by Astro Spectra
Tue Sep 05, 2017 11:34 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?
Replies: 23
Views: 2861

Re: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?

+1 on the TK-690H, I have one on 6m sharing a control head with a 890. Solid 100W mobile. I can also recommend the TK-6110. At 70W it's lower power but you can cover 10m and 6m (with modifications) in one radio and it's a heck of a lot smaller than a low band Syntor.
by Astro Spectra
Tue Sep 05, 2017 11:30 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Optimum frequency for maximum mobile direct simplex coverage?
Replies: 15
Views: 1427

Re: Optimum frequency for maximum mobile direct simplex coverage?

XTL2500 with up/down converter based on Syntor for 10m and 6m, the HF up/down converter is home brew but uses the relatively exotic TN-612 AN/TRC-179 Regency Net HF pre/post selector. The other end of the 80m link was made with a Codan HF radio and a HP signal generator.
by Astro Spectra
Mon Sep 04, 2017 8:31 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Quantro info
Replies: 7
Views: 985

Re: Quantro info

There is a picture of the inside of the 800 MHz IPA here on eBay:

Image

Don't know how long the link to that image will last.
by Astro Spectra
Sun Sep 03, 2017 3:13 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Typical Exciter Output for Base Station and Repeaters
Replies: 4
Views: 668

Re: Typical Exciter Output for Base Station and Repeaters

There is a RF amp hybrid in the Quantro IPA. AFAIK it's the same hybrid as the regular IPA and so delivers up to 10W.
by Astro Spectra
Fri Aug 25, 2017 2:31 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?
Replies: 23
Views: 2861

Re: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?

It's volume driven; in very high volume manufacturing it doesn't matter having multiple variants.

Mil radios are completely different, a 30 to 88 MHZ CNR even without ECCM costs 10x to 40x times a commercial radio price.
by Astro Spectra
Fri Aug 25, 2017 2:13 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Modifying Low Band CDM1550 onto 10m 29 MHz
Replies: 9
Views: 1326

Re: Modifying Low Band CDM1550 onto 10m 29 MHz

...what should I do with a 10m CDM which I only need to program 200 - 300KHz out of band? I only use my radio above 29 MHz on a couple of frequencies so it didn't need anything special other than a routine alignment. What I said, 29 MHz and up performed perfectly with nothing other than a routine a...
by Astro Spectra
Fri Aug 25, 2017 2:09 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?
Replies: 23
Views: 2861

Re: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?

Let's look at the tuning ranges 38/136 = 28%, 67/402 = 16%, 6.3/29.6 = 21% so the low band coverage doesn't look out of line to me.

To cover wide percentage frequency ranges takes a lot of design effort. If you want a commercial Motorola radio that does 10M and 6M get a Syntor.
by Astro Spectra
Fri Aug 25, 2017 1:04 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Optimum frequency for maximum mobile direct simplex coverage?
Replies: 15
Views: 1427

Re: Optimum frequency for maximum mobile direct simplex coverage?

In mixed urban and rural I find 100W P25 into a quarter wave in the centre of the roof delivers superb simplex comms. I'm a fan of 10m but even at 100W it's not panacea. I have access to 70 MHz (I'm outside the USA) but that's limited to 25W and I find the noise limits what you can do there. I've te...
by Astro Spectra
Fri Aug 25, 2017 12:55 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Modifying Low Band CDM1550 onto 10m 29 MHz
Replies: 9
Views: 1326

Re: Modifying Low Band CDM1550 onto 10m 29 MHz

The shift key thing doesn't work AFAIK but the superb web site of Bryan W9CR sets out what you need: http://wiki.w9cr.net/index.php/Waris I used the old CP tool and a hex editor because ... I'm old. The recommended way today is to use the Chirp application. I only use my radio above 29 MHz on a coup...
by Astro Spectra
Wed Aug 16, 2017 2:20 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: "Portable" spectrum analyzer for filter work?
Replies: 10
Views: 1036

Re: "Portable" spectrum analyzer for filter work?

I've only played with one and I was very impressed for the price. It look nicer and the specs are slightly better than the Rigol.

My own machines are the old HP8713 and HP8566. They don't go to site.
by Astro Spectra
Wed Aug 16, 2017 1:25 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: "Portable" spectrum analyzer for filter work?
Replies: 10
Views: 1036

Re: "Portable" spectrum analyzer for filter work?

Siglent SSA3021X with tracking generator option enabled and external RL bridge. Your arms will thank you.

http://www.siglent.com/ENs/pdxx.aspx?id=1299&tid=18&T=2
by Astro Spectra
Sat Jun 24, 2017 9:38 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Quantar backplane ID??
Replies: 4
Views: 752

Re: Quantar backplane ID??

Yep, that three leg part in the TO-92 package is a one wire ID chip (the other two pins are power and ground).
by Astro Spectra
Sat Jun 17, 2017 4:40 pm
Forum: Converting Motorola Equipment to 900MHz Amateur
Topic: External Time Base T5829A for Quantar
Replies: 8
Views: 954

Re: External Time Base T5829A for Quantar

Well for starters V peek-to-peek is roughly 2.8 x V RMS for a sine wave. Also you're measuring the open circuit voltage. If it comes from a 50 or 75 ohm source, it will be half what you measure now when terminated in 50 or 75 ohms. So if you are measuring 6 volts peek-to-peek and the source is inten...
by Astro Spectra
Sat May 06, 2017 6:02 am
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: Low RX audio on XPR7550's compared to XPR6550's
Replies: 5
Views: 804

Re: Low RX audio on XPR7550's compared to XPR6550's

Some of the 'TRBO line don't seem to handle clone well with firmware or CP differences between donor and victim. The audio EID is not to fix this problem but to deal with mixed audio levels noticeable with mixed vendor DMR fleets and particularly noticeable on the DMR-MARC and BM ham networks where ...
by Astro Spectra
Sat May 06, 2017 5:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Solutions sues Hytera Communications for using stolen patents, trade secrets
Replies: 13
Views: 1849

Re: Motorola Solutions sues Hytera Communications for using stolen patents, trade secrets

+1 on Sinclair. Well made, excellent performance, outstanding support. Nothing not to like, eh?
by Astro Spectra
Fri May 05, 2017 2:41 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Multi Band Antenna
Replies: 10
Views: 1729

Re: Multi Band Antenna

Jeff, welcome to BL.
by Astro Spectra
Tue May 02, 2017 7:13 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: DIU V.24 link to Quantar using Juniper CTP1002
Replies: 5
Views: 901

Re: DIU V.24 link to Quantar using Juniper CTP1002

Ground is not a valid V.24/RS-232 level, control lead "on" is something more than +3V. The best way to treat the Quantar and DIU is to use their own RTS output to hold the CTS and CD inputs on. So break out pins 2,7, and 8 on the RJ45 at the Quantar and tie them together. Same at the DIU. ...
by Astro Spectra
Mon Apr 24, 2017 5:53 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Making a MotoTRBO out of a Quantar?
Replies: 2
Views: 644

Re: Making a MotoTRBO out of a Quantar?

Any half decent FM repeater can be made to pass DMR. Follow the sticky here on using back-to-back mobiles for P25 and it'll pass DMR of any flavour including Mototrbo. The addition of the MMDVM board allows connection to the DMRplus network. A true Mototrbo repeater it is not as it doesn't speak IPS...
by Astro Spectra
Tue Apr 11, 2017 12:19 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: SLR8000 mic?
Replies: 3
Views: 663

Re: SLR8000 mic?

If only to key the transmitter, why not program up one of the back I/O pins to do that and just jumper that to ground as needed? That will work in analog and digital.

Go to advanced search