A U.S. Manufacturer of Repeater and Interoperability Controllers and Accessories

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Q: How do I use a tail message to report a power failure?

Let's say we want a message to be appended to the Repeater Initial and Normal ID Messages while the repeater is operating on battery power.  We have wired our Logic Input #4 to detect a power failure.  

We program User Message #1 with the speech we want to hear, like this (see page 6-63):

; Say "power fail thirteen point two volts" or whatever the actual voltage is
99 33 0015 9960 0148 0766 9852 01 00 9960 0150 *

You can test this message with this command:

99 34 0015 *

S-COM Discussion List has moved to groups.io

Yahoo Groups is shutting down their current Groups service.  Because of this, we have moved the S-COM lists to groups.io.

7330 Radio Port to Bridgecom Systems 40U/50V/220

Bridgecom Systems provides documentation for connecting Bridgecom repeaters to the S-COM 7330.  This example sets up the following configuration:

  • the Bridgecom repeater decodes the CTCSS tone and the 7330 generates the CTCSS encode tone.
  • the 7330 generates all IDs and repeater timing.

Here's how to set this up.

Q: I have multiple linked controllers. How can I direct DTMF commands to only one?

The most common way to execute a macro on only one controller is to use different macro names for each site.  This way the macro names don't collide when DTMF is decoded by multiple controllers. 

For example, you can have control macros to enable and disable transmitters.  You could make the first two digits of the macro name unique and keep the last two digits the same.  So the Enable Transmitter macro could be named 8801 on one controller and 7701 on another.  The Disable Transmitter macro could be named 8800 on one controller and 7700 on another.

Q: Can you explain more about how to format an If/Then/Else command?

You can include an If/Then/Else command in a macro to execute one or more commands based on  the test of a controller data type at run time.  The test will return true or false.  The meaning of true and false depends on the data type.  See page 5-21 for details of the supported data types and page 3-9 for more detail of each data type.

Bob's Blog #16: Surface Mount Technology

Most of today’s electronic manufacturing is done in Surface Mount Technology (SMT), developed in the 1960s. It was formerly done in Through-Hole Technology (THT), which is now considered a secondary operation by assembly houses.

The 7330 main board contains 710 components, the majority of which are SMT. What’s involved in SMT manufacturing? It starts with the board.

Bob's Blog #15: Plectron Encoding with the 7330

A benefit of the 7330’s highly flexible design is its ability to generate tones in old or obsolete formats, allowing it to breathe new life into radio systems that may otherwise have to undergo expensive upgrades. For example, a customer recently needed a tone encoder for a legacy Plectron paging system. Here’s what we did and how you can program Plectron tone page macros into your Release 1.8 or newer 7330.

Background

7330 Firmware and Tools Release 1.8 Is Available!

Release 1.8 is now available.

This release has four significant new features:

-- DTMF Mute Bypass.  There are new DTMF Mute Bypass software switches that enable the ability to disable the DTMF Mute and ignore commands on a specific path for that one transmission.  This makes it easier to control remote equipment.

Bob's Blog #14: Connector Breakout Boards

For repeater builders who don’t enjoy soldering wires to the small solder cups on D-subminiature cable connectors, there’s a simple solution: breakout boards, also known as terminal boards.

 A breakout board lets you connect wires to a D-sub via convenient screw terminals. Boards are available with male or female DE-9, DE-15, DA-15, and DB-25 connectors, and some come with plastic enclosures.

Bob's Blog #13: COR Pulse Triggered Macro

In a previous blog we talked about using Long Tone Zero (LiTZ) to reliably trigger a macro with just a single DTMF digit. Now, how about a system that requires no DTMF at all?

WPWNC 1The S-COM 5K, 6K, 7K, and 7330 support a feature known as COR Pulse-Triggered Macro (PTM). PTM lets you trigger a macro by simply clicking your mic button several times in succession.

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