Hey Steve, you may find this link helpful. http://www.bosshardradio.com/dstarrepeatertesting/
This link provides for a PTT switch on the TX and a receive FM audio monitor point. (note the repeater does NOT demodulate dstar date into audio, but you can easily inject narrow FM (+/- 2.5KHZ @1000) into the antenna port and measure SINAD at the discriminator test point). For coverage to be THAT BAD you may have coax lines switched or a shorted connector. DSTAR repeaters are equal or better than FM with some caveats - in motion you may get some loss of sync from multipath, etc. Also be careful if Jon has been helping (grin). To answer your question I believe information is stored in an eeprom and factory guarded software is needed to adjust RX squelch, etc - nothing you can do in the field without some special software. So far I have seen one deaf 440 repeater with a bad crystal filter, and I believe in Frankfurt Germany, DF6RK ran into a PA problem on 440. They have been VERY reliable boxes. (especially for what they are). 73, steve nu5d --- In dstar_digital@yahoogroups.com, Steve Glen <redbirdsfa...@...> wrote: > > Is there an adjustment for receiver sensitivity on either the RP 2C or the > RP4000V? Once a transmitted signal gets more than about 100 or 200 yards > away from the site we can not key the repeater. We have checked antenna, > duplexer, and feed line and all of those seem to be working well. Once the > repeater is keyed, the transmit side is great with an excellent coverage > area. The issue is at the input side. >  > Can anyone point me to where an input signal threshold might be set? A > second question is can anyone suggest a good way to measure the signal > required to âkeyâ the repeater? >  > Feel free to contact me with suggestions here on the list or on at the above > email address. >  > Thank you in advance! >  > Steve Mercure > WU5PIG DStar System. >
