MAIN MENU

Home
Our Services
Back to Product Guide

Welcome... Phone:
800-324-8388
970-249-6129
Fax:
970-249-8919


Digital Telemeters with FSK Transmitters, Receivers and Transceivers
G-7801C Status, Parallel-to-Serial FS Transmitter
G-7802C Status, Serial-to-Parallel FS Receiver
G-7803C Digital Telemeter FS Transmitter
G-7804C Digital Telemeter FS Receiver
Fiber Optic Telemetery Products
G-7618 Dual Low Pass Filter




DataSheet: G-7803C.pdf  06-19-02  82KB

G-7803C Digital Telemeter, FS Transmitter


The G-7803C Digital Telemeter, FS Transmitter incorporates a 10-bit analog-to-digital converter with 6 address bits for multiplexing analog quantites. The FS transmitter is capable of driving into a transmission line with a nominal 600 ohm impedance.

The analog signal to be telemetered is digitized into an 18 bit message, 10 bits of data with 6 bits added either for status inputs or control of the multiplexing scheme. The data message has an added 2 bits of framing for a total message length of 18 bits. This serial message stream is used to key a three-frequency transmitter to interface the data to the transmission line.

A crystal stabilized master clock is provided to set data rate which is numerically half of the channel bandwidth. The G-7903B and G-7903C are available to multiplex up to 64 analog signals on the system.

To improve security against noise, a register is provided allowing the data to be sent twice. A double-scan security check is then performed at the receiver. The sacrifice for this double-scan security is the doubling of the update time.

Specifications

  • FS Center Frequency and Bandwidth: Center frequencies from 420 Hz to 20 kHz, 2% to 15% bandwidths available.
  • DC Input Span: 100 mV minimum, 10 Vdc maximum.
  • Analog Input Impedance: 100 megohms, typical.
  • FS Frequency Stability: +/-0.15% +/-2 Hz in temperature range of -10° C to +55° C.
  • FS Tone Output Level: -30 to 0 dBm.
  • Output Filter: Solder-in, 600 ohm nominal line impedance with rising impedance out-of-band. An optional plug-in filter is available.
  • Data Rates: 30, 60, 120 or 240 bits per second.
  • Power Requirement: +/-12 Vdc at 40 mA.


  • 10 Bit A/D Conversion

  • 30, 60, 120 or 240 Bits-Per-Second Operation

  • Encoder and FS Transmitter In One Module

  • Double-Scan Security

  • Multiple Point Multiplexing

  • Crystal Stabilized Time Base
Picture...
Back To Tone Telemetry

Home Visa/Mastercard Information Request E-mail

Thanks for visiting our Site.  Webmaster  Copyright © 1998-2003   Da-Tel Research Company Inc.