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Search found 136 matches

by Karl NVW
Sun Nov 24, 2019 7:59 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Antenna testing, Return loss or VSWR or ??
Replies: 1
Views: 66

Re: Antenna testing, Return loss or VSWR or ??

Two different ways to express the same amount of impedance mismatch. Some folks like to measure reflected power in absolute watts, others like you prefer the easier add and subtract when looking at the more complex system view. To-may-to, to-mah-to, it's all sauce.
by Karl NVW
Tue Nov 19, 2019 11:48 am
Forum: Smartnet/Smartzone/Project 25 (Phase I/II) Systems
Topic: P25 System Configuaration Question
Replies: 3
Views: 428

Re: P25 System Configuaration Question

Most users elect to field-add the encryption capability into their existing radios acquired in the last several years, which would use those existing IDs and should not require extra system ID licenses. That would allow your fire chief vehicles to talk encrypted on fire or law enforcement TGs as you...
by Karl NVW
Thu Nov 14, 2019 8:39 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Interfacing a Consolette to a quantar RT/RT
Replies: 7
Views: 264

Re: Interfacing a Consolette to a quantar RT/RT

You'll also need either a duplexer or two antennas at each end. Without those the far link end cannot interrupt the local link end while it is transmitting.
by Karl NVW
Sat Nov 02, 2019 5:15 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: GAW 1012 Sig Gen Manual Needed
Replies: 2
Views: 60

Re: GAW 1012 Sig Gen Manual Needed

What is the manufacturer name shown on the front panel or serial number tag?? That model number does not appear to be valid for Motorola Communications test equipment products.
by Karl NVW
Sat Nov 02, 2019 5:09 pm
Forum: Consoles
Topic: Elite Dispatch
Replies: 7
Views: 120

Re: Elite Dispatch

Should be obvious that the op name OP04 cannot be duplicated at the same site. It's similar to assigning the same IP address to both CPUs. That's why they are almost always numbered sequentially as OP01, OP02, OP03, etc.
by Karl NVW
Sun Oct 27, 2019 3:53 pm
Forum: Motorola Digital and Voice Paging
Topic: Motorola Advanced Simulcast Controller
Replies: 3
Views: 243

Re: Motorola Advanced Simulcast Controller

It doesn't always require a set of manuals to fix an ASC issue. You could simply describe the problem and ask your questions.
by Karl NVW
Tue Oct 22, 2019 10:52 am
Forum: Motorola Digital Radio Compatability
Topic: Help With Injecting Audio into a GM300 for a DMR Repeater
Replies: 6
Views: 9709

Re: Help With Injecting Audio into a GM300 for a DMR Repeater

I guess someone should point out to Ernie that the HLD8029 board is for a VHF radio, while the HLE8300B board is for UHF, so MOST of the component values will be different. Radio service manuals for the GM300 family do include schematics as well as images of the PC board foils.
by Karl NVW
Fri Oct 18, 2019 7:14 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Micom XF Auxiliary Connector pinout?
Replies: 2
Views: 133

Re: Micom XF Auxiliary Connector pinout?

It's your lucky day, here you go: 1] NC 2] RS232 Rx 3] RS232 Tx 4] Data PTT 5] Reset-SP 6] SqRxAud 7] GND 8] Sw A+ 9] Tx Aud 10] MIC PTT 11] NC 12] GND 13] Extl Alrm 14] UnsqRxAud 15] Mute Extl Data PTT is for reduced Tx Out Pwr, set by internal pot Mic PTT is full pwr 125W (150 or more at 14.8 VDC!...
by Karl NVW
Mon Oct 14, 2019 11:23 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Mydel mp8230 power supply
Replies: 2
Views: 81

Re: Mydel mp8230 power supply

Nigel, your description of the damage sounds like your power mains suffered a severe voltage surge. It's good that none of your radio equipment was connected when you powered up the supply. Google is your friend, but I haven't found a manual, just the assembly: https://www.radioworld.co.uk/mydel_mp-...
by Karl NVW
Fri Oct 11, 2019 7:44 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MTR2000 RF/audio feedback when remotes unkey
Replies: 10
Views: 192

Re: MTR2000 RF/audio feedback when remotes unkey

I'm not taking pot shots at anyone, just pointing out some incorrect information in your comment. These are discussion groups and I don't mind discussing this topic. I've only been retired a bit over three years, and still have most of the vendor supply catalogs and links to their sites. For the pas...
by Karl NVW
Mon Oct 07, 2019 11:59 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MTR2000 RF/audio feedback when remotes unkey
Replies: 10
Views: 192

Re: MTR2000 RF/audio feedback when remotes unkey

Fineshot1's comment is itself incorrect. For background, I spent 43 years at Motorola Comm/C&E/Solutions, along with other fine RF engineers who contributed to the well-known R56 site standards and practices. Motorola still recommends that collection every day to dealers, consultants and custome...
by Karl NVW
Fri Oct 04, 2019 1:14 pm
Forum: Consoles
Topic: Avtec or Mcc7500 Console and Cisco 8851 Phones
Replies: 2
Views: 227

Re: Avtec or Mcc7500 Console and Cisco 8851 Phones

Not sure that has been done before successfully, but Cisco would know. Here's a link to their user manual which will get you started.
https://web.peralta.edu/it/files/2011/02/Cisco-Unified-IP-Phone-8841-8851-and-8861-User-Guide.pdf
by Karl NVW
Fri Oct 04, 2019 1:03 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MTR2000 RF/audio feedback when remotes unkey
Replies: 10
Views: 192

Re: MTR2000 RF/audio feedback when remotes unkey

Motorola's field organization doesn't recommend use of ANY cabling in the duplex RF path with a braided shield. That goes double when folks are using a notch-only duplexer instead of a properly selected true Bp-Br or bandpass-only model, especially on a multi-user RF site. I'm not saying that you ha...
by Karl NVW
Thu Oct 03, 2019 10:09 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: AN000131A01 vs. PCTWSLMR antennas?
Replies: 7
Views: 293

Re: AN000131A01 vs. PCTWSLMR antennas?

The APX radios internally include matching circuits for the antenna mounted on the radio frame. Motorola's portable radios have been designed that way since back in the days of the HT100 and HT200 Handie-Talkie portables. Let's do a hamshack comparison: Basically you are connecting your 50 ohm analy...
by Karl NVW
Wed Oct 02, 2019 6:47 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: AN000131A01 vs. PCTWSLMR antennas?
Replies: 7
Views: 293

Re: AN000131A01 vs. PCTWSLMR antennas?

Your MFJ analyzer assumes that the antenna is designed to look always like a 50 ohm resistor on all operating frequencies. That assumption is invalid.
by Karl NVW
Thu Sep 26, 2019 6:29 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Help Quantar Power Supply
Replies: 10
Views: 148

Re: Help Quantar Power Supply

The later replacement model of the power supply (NOT made by Oman) should still be available from APD, or from companies who buy old radio systems just to part them out. I'm surprised your unit lasted so long. We used to dread unplugging a station for service or updating because we never could be su...
by Karl NVW
Tue Sep 10, 2019 1:51 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Radio Shelter Relocation
Replies: 6
Views: 171

Re: Radio Shelter Relocation

If you decide to proceed, YES, you can and should reuse the Heliax lines and pressurized waveguide runs. But first I urge your department to understand the timetable of relocating the shelter and require all affected parties to sign off on the extended period of time that the entire site will be com...
by Karl NVW
Tue Sep 10, 2019 12:50 pm
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: zetron model 30
Replies: 1
Views: 69

Re: zetron model 30

Your friend "Someone" said the user would have to connect the Zetron Model 30 directly to the base station. That's right, it won't interface with a TRBO mobile or portable radio, just to some (not every) TRBO base station. Of course your customer must also comply with the FCC Rules for ope...
by Karl NVW
Mon Sep 02, 2019 12:10 pm
Forum: Motorola CP/CM Series Subscribers
Topic: Mototrbo CPS question: Version
Replies: 1
Views: 460

Re: Mototrbo CPS question: Version

As I recall, versions up through 10.anything still allowed setting analog for either 25 or 12.5 kHz channel width. The requirement for a 25 kHz entitlement keyfile began at 11.0.1 and created significant rancor within the Moto-ham DMR population, including myself. It was not one of Moto's well expla...
by Karl NVW
Tue Aug 27, 2019 6:54 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spanner ?
Replies: 4
Views: 598

Re: Spanner ?

No photo found, but I would start by thinking about removing the volume control or frequency selector switch on VERY old portables, back before all those functions were moved into software. What models did you have to repair often? Another possibility could be the removeable antenna relay for Public...
by Karl NVW
Tue Aug 27, 2019 6:41 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Amateur question regarding APX radios
Replies: 5
Views: 722

Re: Amateur question regarding APX radios

1. APX8000 radios include ASTRO P25, both Phase 1 and optionally Phase 2, along with analog mode. It does not include conventional (non-trunked) digital formats from other manufacturers. nor MotoTRBO. 2. Yes, it's all in the programming. 3' Depends on whether your existing channel can be converted t...
by Karl NVW
Mon Aug 26, 2019 4:54 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Amateur question regarding APX radios
Replies: 5
Views: 722

Re: Amateur question regarding APX radios

Your department's command staff should talk the managers in charge of the dispatch center, the mutual-aid committee, and other digital radio systems in your area. Some decisions need to be made at their level or higher, such as your state's SEIC or Fire Marshall. Folks who are not already experience...
by Karl NVW
Fri Aug 23, 2019 10:25 am
Forum: Vehicle Radio Installs
Topic: 700 trunking antenna on a fiberglass boat roof
Replies: 5
Views: 518

Re: 700 trunking antenna on a fiberglass boat roof

And I too am sorry that as usual I was overthinking the math. Adjust the size of the aluminum foil pie plate to USA food industry standard size of NINE inches. When you squash it flat and duct-tape it to the underside of the cabin roof it will be almost perfect. Or you can use a metal pizza pan 12&q...
by Karl NVW
Fri Aug 23, 2019 10:13 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Mostar service manuals
Replies: 16
Views: 929

Re: Motorola Mostar service manuals

MOSTAR used the R1801 suitcase programmer to burn a 16-pin DIP code plug. We learned to never burn a batch of CP copies until you had thoroughly tested every possible option in the first one. MOSTAR and its econo-sibling TRAXAR had frequency synthesizer circuitry reputed to be VERY microphonic, espe...
by Karl NVW
Thu Aug 22, 2019 10:40 am
Forum: APX Series Subscribers
Topic: APX8000XE + XE RSM Speaker Mics
Replies: 12
Views: 409

Re: APX8000XE + XE RSM Speaker Mics

First let's confirm: Does the 'noise on transmit, no voice' issue follow the radio or stay with the specific RSM unit? If it follows the radio, those radios might have been programmed for default or locked encrypted transmit (probably ADP) instead of clear voice on that specific talk group. That is ...
by Karl NVW
Thu Aug 22, 2019 10:06 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola SL7550e
Replies: 1
Views: 418

Re: Motorola SL7550e

This is truly a no-brainer. Don't do it. You risk confiscation of your radios and other possessions, temporary legal detention, and potential expulsion. It can be worse if you are caught in an eastern bloc country not politically friendly to the USA.
by Karl NVW
Tue Aug 20, 2019 9:37 am
Forum: Vehicle Radio Installs
Topic: 700 trunking antenna on a fiberglass boat roof
Replies: 5
Views: 518

Re: 700 trunking antenna on a fiberglass boat roof

Same rules still apply that you used to follow on HB, UHF, or 800 MHz in this situation. A thick NMO with metal foil tape (or an 11" aluminum pie plate) on the underside of the roof will get you there. If you are installing on a vessel that runs in rough water, use only the quarter-wave "s...
by Karl NVW
Tue Aug 13, 2019 11:32 am
Forum: APX Series Subscribers
Topic: APX8000XE vs/ APX8000HXE
Replies: 4
Views: 283

Re: APX8000XE vs/ APX8000HXE

There once was a time when I could have answered that question, but I am no longer included in the Product Development loop. Nowadays I don't know any more than the rest of the readers.
by Karl NVW
Sat Aug 10, 2019 6:15 pm
Forum: APX Series Subscribers
Topic: APX8000XE vs/ APX8000HXE
Replies: 4
Views: 283

Re: APX8000XE vs/ APX8000HXE

Nothing new, it's been that way for decades, going way back to the feud between Underwriters Labs and Factory Mutual. It's the same concept with Hazardous Location Listings that the FCC applies to pending hardware type approvals: Product cannot be offered for sale until the approval process is compl...
by Karl NVW
Sat Aug 10, 2019 5:56 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Fixed level audio output from MaxTrac 100
Replies: 8
Views: 3297

Re: Fixed level audio output from MaxTrac 100

Remember to use the pin labeling for the 8-pin mic jack as shown in the manual. Israel did is backwards from everyone one else in the world, but that's what they used and printed in the manuals. Put a 680 ohm resistor in series with the handset audio high on pin 8.
by Karl NVW
Thu Jul 04, 2019 10:20 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: ATIA - Channel Number/Frequency?
Replies: 1
Views: 1233

Re: ATIA - Channel Number/Frequency?

I no longer have access to specific ATIA stream details or docs, but YES, at least one of the four channel frequency attributes you listed should be in the packet. The documentation you are using may well be outdated unless it came with the system release software for the specific system you are mon...
by Karl NVW
Mon Jun 17, 2019 10:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: HT750/HT1250 Low band antenna - red color code??
Replies: 10
Views: 1939

Re: HT750/HT1250 Low band antenna - red color code??

Unofficially, engineering field strength tests on the antenna range were in the area of 18 to 24 dB loss relative to isotropic. And it obviously got worse if the user "stored" the speaker-mic coil cord by wrapping it around the antenna.
by Karl NVW
Mon Jun 17, 2019 10:26 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra A7 power issue
Replies: 2
Views: 1441

Re: Spectra A7 power issue

Two c0ommon possibilities: 1) The speaker leads of the Spectra are both isolated from ground. A MaxTRAC speaker feed has one side grounded to chassis. If you had any grounded lead connected to the MaxTRAC (including the antenna connector) you probably fried the audio output stage. ... OR ... 2) It c...
by Karl NVW
Tue Jun 11, 2019 7:44 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Maratrac
Replies: 5
Views: 180

Re: Maratrac

Many low-cost 3rd party controllers with internal CTCSS generators DO inhibit the TX PL as soon as the COR signal drops. That's much cheaper than designing their products to meet commercial usage standards, including the turn-off burst sent during the hang time. But also know that the Maratrac is NO...
by Karl NVW
Tue Jun 11, 2019 7:30 pm
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: How to program a large number of channels?
Replies: 4
Views: 261

Re: How to program a large number of channels?

RFGuy, you have to remember that there are very few commercial or public safety users who change their operating frequencies even annually, unlike some amateur operators (you know who you are) who feel they need to access every possibly active frequency within a 200 mile range. The FCC doesn't allow...
by Karl NVW
Tue Jun 11, 2019 7:16 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: HT750/HT1250 Low band antenna - red color code??
Replies: 10
Views: 1939

Re: HT750/HT1250 Low band antenna - red color code??

If you follow the alignment instructions in the radio manual, tuning of the TX output stage will take the antenna impedance into account on the working frequencies.
by Karl NVW
Sat Jun 01, 2019 6:26 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Keyup Nucleus
Replies: 3
Views: 201

Re: Keyup Nucleus

Nucleus cannot be keyed that way while running in simulcast mode.
by Karl NVW
Fri May 10, 2019 4:12 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Missing Schematic
Replies: 3
Views: 2649

Re: Missing Schematic

So you appear to simply be running Tone Remote Control over a 4-wire connection. Not much to worry about in the 'white smoke' category.
by Karl NVW
Fri Feb 22, 2019 1:16 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Any idead how far a 10 watt lsb radio would tx ?
Replies: 5
Views: 3371

Re: Any idead how far a 10 watt lsb radio would tx ?

My first question would be "Where do you plan to use this equipment?" both from a geographic and a spectrum perspective. Not all countries permit that type of communications or have HF channels speciallly reserved for such usage. Range also depends on the equipment at the other end - talki...
by Karl NVW
Fri Feb 22, 2019 1:11 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: 3rd World LMR Equip VHF
Replies: 4
Views: 3310

Re: 3rd World LMR Equip VHF

Most western hemisphere government entities place restrictions on message content in the amateur bands. Boiled down to basics, a station operating on amateur frequencies can't be used for any commercial or business purposes. No taxis, ambulances, security, GMRS or FRS either. If you are planning to ...
by Karl NVW
Fri Feb 22, 2019 1:08 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: 3rd World LMR Equip VHF
Replies: 4
Views: 3310

Re: 3rd World LMR Equip VHF

Most western hemisphere government entities place restrictions on message content in the amateur bands. Boiled down to basics, a station operating on amateur frequencies can't be used for any commercial or business purposes. No taxis, ambulances, security, GMRS or FRS either. If you are planning to ...
by Karl NVW
Tue Feb 05, 2019 1:06 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola GLN 6323 E Charger
Replies: 3
Views: 3221

Re: Motorola GLN 6323 E Charger

The charger requires a 220 VAC 50 Hz input and the cord has the European plug. It will not charge the battery if plugged into 120 VAC power available here in the USA using a travel adaptor. Just a hunch that the EX relates to an 'extended' duty 10+ hour 5-5-90 battery, which is taller than the stand...
by Karl NVW
Sun Jan 20, 2019 5:21 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Minitor V Rf Board No RX
Replies: 4
Views: 4122

Re: Minitor V Rf Board No RX

Confirmed that you CANNOT change the band of the LB Minitor V in that fashion.
by Karl NVW
Thu Jan 03, 2019 7:23 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Perplexed by Date code newer M accessories
Replies: 6
Views: 4358

Re: Perplexed by Date code newer M accessories

MAL2 is the assembly location code, it's somewhere in Maylasia
by Karl NVW
Sun Dec 30, 2018 6:31 pm
Forum: Consoles
Topic: Centracom Gold B&L - Remote Operator Positions?
Replies: 2
Views: 470

Re: Centracom Gold B&L - Remote Operator Positions?

Yes, it is possible. The hardware is included in the B&L service manual. Design details are in the System Planner document. You may be able to locate one at your local dealer/service shop and borrow or photocopy it.
by Karl NVW
Mon Oct 01, 2018 5:59 pm
Forum: Vehicle Radio Installs
Topic: Can't figure how SSN4005A works.
Replies: 7
Views: 739

Re: Can't figure how SSN4005A works.

It helps when you have all the pieces and don't just guess which wire goes where. If you were plugging the speaker and microphone devices into the proper junction box, you would see that each receptacle was labeled. Both connectors needed to be polarized and captive-locking, and were for two conduct...
by Karl NVW
Sun Sep 16, 2018 5:07 pm
Forum: Converting Motorola Equipment to 900MHz Amateur
Topic: GTX 900 mobile
Replies: 3
Views: 752

Re: GTX 900 mobile

Not exactly. The radio has a wide design range, but there is a band limit in the programming software.
by Karl NVW
Sun Sep 02, 2018 6:53 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Quantar SINAD and pre-selector alignment
Replies: 6
Views: 845

Re: Quantar SINAD and pre-selector alignment

SINAD is measured at the rated audio output listed on the radio specification sheet, NOT wide open. And it's the last step in receiver alignment, after everything else has been peaked up correctly.
by Karl NVW
Sun Aug 26, 2018 1:27 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: XTS2500 Transmitting After Being Turned Off?
Replies: 3
Views: 704

Re: XTS2500 Transmitting After Being Turned Off?

It is possible if the P25 system owner uses positive subscriber access ("whitelist") to detect intruders and then latches them into "Radio Monitor" mode to obtain voiceprint recordings. Another posibility is if the radios are programmed to auto-key after the emergency button is t...

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