[DSTAR_DIGITAL] FS: ID-RP2V 1.2 GHz Repeater NEW
All: This is a new unit, never used. We have two 440 MHz systems and do not have enough time to implement 1.2 GHz as well. Please see my eBay listing here: http://tinyurl.com/2wjcxyq Greg N6LDJ
[DSTAR_DIGITAL] IC92 w/BC-177 Desktop Chrgr - charge and RX same time?
Can anyone advise if the BC-177 DESKTOP CHARGER (for the IC92) can charge the radio battery while the radio is turned on in the charger (receiving, not transmitting)? My 91AD with BC139 desktop charger is incapable of doing both - even when using the wall charger (this is really a WTF). The radio just heats up when using the wall charger when on (RX only). Greg N6LDJ
RE: [DSTAR_DIGITAL] Re: Dstar Repeater receive is bad . .
It is not the loss, it's the isolation we are all after. Some typical RG58 cables have less than 80 dB, while the solid shield cables can exceed 120 dB. Even with the 80 dB stuff, that's 160 dB total (cable-to-cable) so it should be fine, unless the transmitter has a problem. I measured two separate RP4000 receivers for transmitter noise and desensitization (high-power, into a good matched load) using the recommended analog techniques, both with factory cables installed. Neither problem was found in my units (they are about 2 years old). My standard is no greater than 1 dB degradation. Both suffer from generally poor sensitivity, but nothing like you are experiencing. I am guessing about 3-6 dB worse than a comparable analog receiver when installed with the same antenna system/same site. The GMSK signal also seems to be much more susceptible to multipath than analog. I have noticed that when the repeater site is much higher than any surrounding hills, the receiver performs significantly better (meaning there is possibly fewer local reflection points). I suspect it is site noise; Lukens is a busy site...perform an analog receiver sens test with the antenna system, and into a matched load. Greg N6LDJ We will change the internal cables and make measurements in test points and will look for a better duplexer and see if things will get better. RG-213 saves 0.1 db over RG-58. Wow! We wouldn't waste our time. 73--John Please TRIM your replies or set your email program not to include the original message in reply unless needed for clarity. ThanksYahoo! Groups Links
RE: [DSTAR_DIGITAL] GPS Adapter for D-Star Radio!
I suspect this will be the only way. I would be much happier If ICOM would also consider placing the microphone, and possibly the external speaker connection on the control head *and* rear of radio. Greg image001.jpg
RE: [DSTAR_DIGITAL] GPS Adapter for D-Star Radio!
Jeff: Will this allow the 2820 control head to fit on the front of the radio *and* allow use of the GPS antenna? Greg -Original Message- Hey All, I just found a place in San Jose, Ca. (A Mom/Pop) type place that custom makes Cables with Adapters. I am in need of a MCX Adapter from 90deg to Straight for the IC-2820, and they have Custom Lengths and make to order, NO MINIMUMS..
[DSTAR_DIGITAL] dplus link to reflector dropping
Hi Robin, others: The W6UUU repeater often drops its dplus link to reflectors. Yesterday it did this in the middle of a transmission from a reflector. I am trying to determine where the problem might be. Dplus log file of the failure yesterday below from W6UUU. Condition: W6UUU and K6MDD were both connected to REF14C; message from REF14C to W6UUU (initiated form K6BIV) was cutoff mid-transmission while listening on the W6UUU B: ... Remote client forward start streamid d4ac 2009/03/09 10:55:28.306 rpt2 (W6UUU G) rpt1 (W6UUU B) urcall (CQCQCQ ) mycall (N6LDJ /GREG) user message (Northern California ) mycall (N6LDJ ) streamid d4ac Stream end streamid d4ac cnt 14 missed 0 2009/03/09 10:55:28.550 Linked gateway list: 2009/03/09 10:55:28.904 remote gateway 24.234.4.116:20001call REF014 C status Linked to B Last heard list: 2009/03/09 10:55:28 user (N6LDJ ) rpt (W6UUU B) type RF msg (Northern California ) 2009/03/09 10:55:28 Remote gateway tx start (REF014 C) streamid 3c51 hdr BAD 2009/03/09 10:55:29.815 rpt2 (K6MDD G) rpt1 (REF014 C) urcall (CQCQCQ ) mycall (K6BIV /2820) user message ( k6...@mac.com ) mycall (K6BIV ) streamid 3c51 hdr f 40 r2 K6MDD G r1 K6MDD B ur CQCQCQ my K6BIV /2820 fc 23b5 OK remote gw/ref 24.234.4.116 timeout playfile /dstar/dv/remotesystemunlinked.dvtool to B playfile mod 1 tvs/u 1236621355/565467 tvps/u 1236621348/553734 timediff 7011 Reading file /dstar/tmp/play-b.dvtool to 'B' streamid 26c7 2009/03/09 10:55:55.565 rpt2 (W6UUU B) rpt1 (W6UUU G) urcall (CQCQCQ ) mycall (W6UUU /RPTR) Finished reading file /dstar/tmp/play-b.dvtool to 'B' streamid 26c7 2009/03/09 10:55:55.565 data request from 24.234.4.116:20001 denied Play file recall to module B stream 26c7 data request from 24.234.4.116:20001 denied data request from 24.234.4.116:20001 denied data request from 24.234.4.116:20001 denied ... data request from 24.234.4.116:20001 denied Stream start streamid 5bd9 2009/03/09 10:56:03.156 rpt2 (W6UUU G) rpt1 (W6UUU B) urcall (CQCQCQ ) mycall (N6LDJ /GREG) user message (Northern California ) mycall (N6LDJ ) streamid 5bd9 hdr f 40 r2 W6UUU G r1 W6UUU B ur CQCQCQ my N6LDJ /GREG fc a720 OK User update (W6UUU S) rpt (W6UUU S) 2009/03/09 10:56:04.997 Stream end streamid 5bd9 cnt 205 missed 0 2009/03/09 10:56:07.233 Any ideas where I might look? Greg N6LDJ
RE: [dstar_digital] Help with poor audio on Dstar System?
Aaron: While we are all learning, I disagree from the posts that you have a packet loss problem. The W6YYY system has been having measurable packet loss problems (from zero to 40%) in bursts - the effect of ISP packet loss on dstar audio is not the garble you are hearing, but missed words, syllables - basically, a very choppy, jittery sound. Entire words will be missed, then the audio will appear fine. ISP packet loss does not seem to cause what I was hearing on the recording. Your recorded audio indicates that the voice error correction in the voice coder is unable to correct all the errors. Usually this is an RF problem, but you specifically said it occurs during gateway and reflector operation. So my conclusion is to use tools that can determine error rates as opposed to packet loss. I cannot suggest tool for this. Also heard was the common 4-5 second period of garble, then recovery. This is usually an RF problem, not ISP. This phenomena is common to the design of the VHF and UHF repeater receivers - its is almost like a tight squelch problem. I thought this was just a digital characteristic, but then I listened to 1.2 GHz repeaters, and these users gracefully start distorting, recover, etc. when they are weak. No 4-5 second dropouts. Try this: Have a strong user access the repeater, then disconnect the receiver antenna line in the middle of the message. The repeater transmitter will transmit 4-5 seconds of garble, then drop out. If you disconnect it for only a second or two, then reconnect, the user will still be garbled for the same duration, then recover. The same thing will occur if another stronger user, or stronger interference (IX) covers the desired signal. So I am saying that some of the recordings were just weak RF, or IX issues; the others were different. Greg Forrest N6LDJ W6YYY/W6UUU Trustee 440.0375 +5MHz Voice (Oakland, CA) 444.0375 +5MHz Voice (Pleasanton Garage, CA) 925-337- [EMAIL PROTECTED]
RE: [dstar_digital] streaming D Star
404... Greg -Original Message- From: dstar_digital@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Michael Heitmann Sent: Monday, August 11, 2008 15:30 To: dstar_digital@yahoogroups.com Subject: RE: [dstar_digital] streaming D Star WA7FW in Federal Way, WA has an audio stream. Enter the following URL in Windows Media Player: http://wa7fw.org/ http://wa7fw.org
RE: [dstar_digital] CHIRP: An open-source programming tool for ICOM radios
..the new kitten on the keyboard Greg Greg, If you typed anything in reply, it didn't show up... just blank.
RE: [dstar_digital] CHIRP: An open-source programming tool for ICOM radios
-Original Message- From: dstar_digital@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Nate Duehr Sent: Friday, July 25, 2008 16:05 To: dstar_digital@yahoogroups.com Subject: Re: [dstar_digital] CHIRP: An open-source programming tool for ICOM radios John D. Hays wrote: There is a PERL based 91AD programmer at http://dstarutah.org http://dstarutah.org in the files section. It may help you figure out some additional parameters. The comments in the Perl are great, by the way... full descriptions of the binary/hex that's going in/out. Good programmer! Nate WY0X Please TRIM your replies or set your email program not to include the original message in reply unless needed for clarity. ThanksYahoo! Groups Links
RE: [dstar_digital] Inside DSTAR Repeaters
Hi Steve: Can you get the +3V from any of the remaining conductors on the rear of the RP4000? That would make it easy to make a single-ended external test cable. I have installed a 1/8 jack on the front of the RP4000 and used a 100k isolation resistor on the disc out and it works great here for measurements. Greg N6LDJ You can key the TX by applying +3.0 VDC to the TXE lead (disconnect controller FIRST or diode OR).
[dstar_digital] Noise/Desense and Loss Measurements - RP4000V Cables
**Transmitter Noise/Desense Test of Stock Internal Cables - RP4000V** Receive Frequency: 449.0375 MHz Transmit Frequency: 444.0375 MHz Power at chassis transmitter antenna port: 23 watts (Telewave broadband wattmeter w/50 ohm load) Test Condition: 50 Ohm Load on the RP4000V Transmitter Port Monitoring the discriminator output (MIN line on the receiver module) Reference Signal (transmitter not keyed): -118 dBm with 1 kHz tone/3 kHz deviation Reference Signal (transmitter keyed): -118 dBm with 1 kHz tone/3 kHz deviation Degradation: 0 dB (I even had the case/cover of the receiver open during these tests) **Measured Cable Loss** Equipment: HP 8920A Transmit Frequency: 444.0375 MHz Power at module transmitter antenna port: 19.2 w/42.8 dBm (incl. jumper cable loss) Power at chassis transmitter antenna port: 18.4 w/42.6 dBm (incl. jumper cable loss) Internal Cable/Connector Insertion Loss: 0.2 dB Conclusion: Don't waste your time changing these factory cables on this model. Could somebody make similar measurements on a RP2000V? I don't have one... Greg N6LDJ Greg Forrest N6LDJ W6YYY/W6UUU Trustee 440.0375 +5MHz Voice (Oakland, CA) 444.0375 +5MHz Voice (Pleasanton Garage, CA) 925-337- [EMAIL PROTECTED]
