An idea is to use a simple repeater controller connected to the radios' speaker-mic connections.
one radio will receive only, one radio will transmit only. Make sure you keep them separated about nine feet or greater if you are going to use the amp on the one that is going to transmit. ~Benjamin, KB9LFZ On Thu, 2008-11-13 at 14:44 -0200, ANDRE wrote: > Hi all, > > I have 2 motorola DTR FHSS 900mhz, and i want to bild a repeater for > use in my farm thats near my store , 5miles. > I know the max watts DTR are 1W, and i didnt find any Repeater or amp > for it. > > I found 900MHz Smartamp, 10W amp that works on FHSS, so i was > wondering, > > Can i use a DTR + simplex 40second rec + smartamp + antenna? > > Will this amp (its for data) - 12-103 SmartAmp Bi-Directional 900 MHz: > 10 Watt Designed for extending the range of 900 MHz wireless radio > devices, this is particularly > effective when used with Direct Sequence or Frequency Hopping Spread > Spectrum. Full output power of 10 W is achieved with only 16 mW input > to the > amplifier. Above 16 mW input, the SmartAmp™ attenuates the input > signal power and maintains the output power typically at 10W. The > built-in dynamic power sensor in SmartAmp™ adjusts the Radio Frequency > (RF) power output level by reading the input signal power. This > Automatic Gain Control (AGC) Technology, Teletronics' patented > technology effectively making the RF amplifiers "Plug & Play" delivers > the maximum output power at various input levels while keeping the > distortion at a minimum. > > Technical Specifications Smartamp > > Features: > > 10 Watt > > Operating Range: > > 902 - 928 MHz > > Operating Mode: > > Bi-directional, TDD > > Transmit Gain: > > 28 dB (can be customized to 33dB) > > Frequency Response: > > ± 0.75 dB over operating range > > Output Power: > > 10 Watt (+40 dBm) nominal > > TX Input Power: > > 500mW > > Receiver Gain: > > 12 dB typical ±1 dB > > Noise Figure: > > 3.5 dB typical > > Connectors: > > N-type, female, 50 Ohm > > Lightning Protection: > > Quarter Wave Technology > > DC Surge Protection: > > Available > > Power Consumption: > > <2A @ 12-15 VDC (100% duty cycle) > > Operating Temperature: > > Amplifier: -30 °C to + 70 °C > 15V DC injector: -30 °C to + 70 °C > > will work in this way? > or anyone knows a repeater for this digital radios(cheap please) > > Thanks > > Mattos > > > > >
