NARA Repeater System Update January 11, 2016

Repeater System Enhancements  Washington and Woodbury run completely audio- flat  All system tones are generated from the local machine  DTMF sequences will route across the system but will not be transmitted from any user access port - All machines will have pre-access enabled  All internal system links run without courtesy tones  All system IDs will move to 2175Hz

Repeater System Enhancements  Washington will no longer transmit courtesy tones - Primary system access should be through Warren, New Milford, and Woodbury machines  Washington will filter all system IDs via port 1 RX audio notch filters (~60db)  All local machine audio will have the beep-boop courtesy tone - all link audio will use a boop-beep tone.  Link radio TX hang time is eliminated, but COR logic is changed to reduce the chances of links doubling into Washington

Pre-Access Functionality  All machines have pre-access enabled for DTMF decoding  Local machine access requires a * tone  Accessing a remote system requires its pre- access code: Washington#81Washington#81 New Milford#82New Milford#82 Warren#83Warren#83 Woodbury#84Woodbury#84

Remote Linking Requirements  External links can slave the Washington machine  Links must ID at 2175Hz  No courtesy tones should be sent across the link  Link radio hang time should be as short as possible (while still avoiding ping-ponging)  DTMF sequences for linking and de-linking are shared with NARA

Next Steps  New Milford - Geiger Rd - 2m Convert TX PL disable externalConvert TX PL disable external Install new link controller and programInstall new link controller and program Install link radio and set levelsInstall link radio and set levels  Washington - Fenn Hill Rd - 70cm Install audio notch filters - port 1 RXInstall audio notch filters - port 1 RX Install tone preemphasis capsInstall tone preemphasis caps Install new programInstall new program Disable or repurpose Geiger linkDisable or repurpose Geiger link

Other Initiatives  APRS digipeater - Woodbury Radio - 2ch Motorola MaxTracRadio - 2ch Motorola MaxTrac Control - Kantronics KPC3+ (ver 8.3)Control - Kantronics KPC3+ (ver 8.3) Antenna - Unity gain groundplaneAntenna - Unity gain groundplane  Micor conversion to 6m (Warren, Woodbury, or Danbury)  On-site Echolink and/or IRLP (Woodbury or Washington)  2.4Ghz links for internet access  Antenna system upgrade for Washington