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FSK Transmitters, Receivers and Transceivers
G-9105 Dual FS Transmitter
G-7606C FSK Receiver
G-8000C Transceiver
G-8815 Programmable FS Transmitter




 

G-7606C FSK RECEIVER


The G-7606C FSK Receiver converts freqency shift tones in the frequency range of 420 Hz to 10 kHz into 2 state or 3 state functional outputs. Typical applications include the driving of digital supervisory equipment and other critical circuitry that requires sharp wave fronts and no break-up of the leading and trailing edges of pulses.

Two comparator circuits are provided after the discriminator to separate the mark and space outputs for 2F or 3F operation. Each comparator has a front panel bias control to permit adjustment to these outputs. A single switch allows selection of either 2F or 3F operation. A center output indicates when both mark and space are not detected. A blocking network disables the mark, center and space outputs when the carrier detector is in fail, preventing false data output. This carrier detector block can also be disabled by a single switch setting.

Space is provided at the rear of the module for three SPDT relays with mercury-wetted contacts for space, mark and carrier fail alarm. An optional industrial relay can be selected to replace thee mercury-wetted relays in cases where position is a problem and contact bounce is not critical. The mark and space relays can be replaced with a latching bi-stable mercury-wetted relay for kWHr pulse systems.

The G-7606C FSK Receiver, when equipped with mark and space relays, can be used with the 3F alarm flasher and sampler circuits on the G-7605C, G-7007B or G-8080 Transmitters at the transmit end to carry two independent alarms or slow speed data channels.

A complete AM receiver circuit is provided as standard equipment that operates off the output of the channel filter and is used as a carrier detector that can be set at any trip level between -10 dBm and -40 dBm to indicate the loss of carrier below the theshold level.

Specifications

  • Center Frequency and Bandwidth: 420 Hz to 10kHz bandwidths of 2.0 to 10% of center frequency. Filters reject adjacent channels by 36 dB. Plug-in filter available.
  • Operating Temperature: -30° C to 60° C.
  • Power Source: 12 Vdc +/- 10% at mA plus outputs.
  • AM Sensitivity: -40 dBm, max. adjustable to -10 dBm.
  • FS Sensitivity: -45 dBm.
  • FS Operating Dynamic Range: 40 dBm.
  • Output Pulse Quality: Sharp pulse rise times of less than 1.0 microsecond, no pulse edge breakup.
  • Outputs: Three seperate outputs, mark, space, and carrier; 0 to 12 volts, currents of 1 to 100 mA at 10 V. max.; 3 relays, mercury-wetted contacts, optional at additional cost mounted on the PC board. Digital outputs of 0 and +5 volts are available on order.
  • Diagnostics: Front panel test socket and mark, space and carrier fail LEDs.


Picture...

  • NARROW BAND TONE FILTER

  • LIMITING AMPLIFIER

  • OPTIONAL RELAY OUTPUTS

  • FRONT PANEL DIAGNOSTIC LED'S

  • 2F OR 3F OPERATION

  • OPTIONAL PLUG-IN FILTER


DataSheet: G-7606C.pdf  10-01-03  54KB


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