RAU 42 - NEW EMERGENCY TELEPHONE NETWORK

  • Corlay R
  • Guiheneuf M
  • Spiteri J-C

OPTICAL FIBER SUBMARINE TRANSMISSION SYSTEMS

  • Blanc E
  • Jocteur R
  • Trezeguet J-P

Microwave Transmitter and Receiver

  • Jensen R.
  • Rowe R.
  • Sherman R.

T h e microwave t r a n s m i t t e r and receiver units constitute t h e basic building blocks for the T D - 3 radio system. T h e y provide the gain necessary to compensate for the transmission loss of the station-tostation ...

Schottky Barrier Receiver Modulator

  • Abele T.
  • Alberts A.
  • Ren C.
  • Tuchen G.

The receiver modulator of the TD-3 repeater is the first unit in the signal path which uses active devices. Because it is in the signal path, its transmission characteristics must be well behaved, and because it is at the front end of the repeater, its low thermal noise is of ...

Transmitter Modulator and Receiver Shift Modulator

  • Hamori A.
  • Penney P.

In the T D - 3 radio repeater, two upconverters are used: the transmitter modulator and the receiver shift modulator. 1 Although the electrical requirements for these modulators are quite different, the microwave circuit is similar for both. In a T D - 3 microwave transmitter, an FM modulated 70 ...

Active Solid-State Devices

  • Elder H.

Twenty new solid-state devices were developed to meet the TD-3 requirements. The FM terminal transmitter needed a variable capacitor diode (457A) as the active element in the deviator, a very stable voltage regulator diode (446AC), and a transistor oscillator (44A). A family of medium-power varactors (473A, B, and C) was ...

Networks

  • Drazy E.
  • Maclean R.
  • Sheehey R.

As described in the first article of this issue, all selectivity required by the microwave transmitter and microwave receiver of the T D - 3 radio system is provided by passive networks. 1 The general plan followed in the design and development of these networks was to: (i) Determine, from ...