VHF Transmitters

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TX·790

VHF
Transmitters

Range of VHF Radio Transmitters

  • 5 or 9 Hardwired input models
  • Serial connection models
  • Limited Contact ID models
  • New chassis design
  • New slip whip antenna
  • Programmable alarm input delay
  • Programmable periodic test intervals
  • Programmable positive or negative trip
  • Engineer test button

Features

  • Field programmable features for on-site convenience.
  • Synthesized design.
  • Engineer test button – for easy on-site testing.
  • Low battery reporting.
  • Battery restore reporting
  • All inputs may be programmed individually for positive or negative trip making the transmitter compatible with any control panel.
  • Power-up signal transmission after re-boot indicating possible willful tamper condition.
  • Programmable mains fail/restore signal delays from 15 to 250 minutes.
  • After power up, a 5 minute test window is available for the Technician to test mains fail/restore without delays.
  • Random transmission delay for mains fail/restore events thus reducing the possibility of signal clashes during area power outages.
  • Signal buffering is used when inputs are triggered simultaneously. Signals are stored in the transmitter and sent in event order.
  • Manufactured using the latest surface mounting techniques which minimizes the chances of human error.
  • The transmitter draws low current on standby placing minimal strain on the system battery.
  • On board LED indicates seven different transmitter conditions for fast and simple diagnostics.

Transmitter Specifications – TX 790C Range

Frequency Range
Channel Spacing
Operating Voltage
Modulation Method
Frequency tolerance

Narrow Bandwidth
Spurious Emissions:
a) Harmonic
b) Non harmonic

Deviation:
Nominal
Temperature range
Class of Emission
Antenna Impedance

Current Consumption:
Standby
Transmit

Overall Dimensions
Mounting
Antenna Socket
Transmission Duration

Telemetry Inputs:
Output voltage range






Inputs Connections

132 - 174 MHz
12.5 KHz
10.5 to 13.8 Volts DC
FM
5 ppm



> 60 dB
> 70 dB

Adjustable between 1.5 and 2.5 KHz
Approximately 2 KHz
-10 to + 60 C
F3E
50 Ohms


30 mA
1.8 Amps at 12V nominal

112mm x 81mm x 24mm
2 x 7mm holes
Internal tamper proof antenna connection
90 - 360 mS


Positive Trip - 10.8~14V
Negative Trip - Open Collector 0~0.5V
The transmitter inputs accommodate only the
above alarm panel output voltage ranges.
Alarm panels which do not meet this requirement
will require a level converter interface.

Screw terminals

Transmitter Specifications – TX 790C Range

Models

TX 750C
Reports a 4 digit code number and 11 telemetry conditions:
•  open/close
•  panic
•  alarm
•  battery low/ restore
•  self-test
•  engineer test
•  telemetry 5
•  dedicated mains fail/restore
TX 790C 
Reports a 4 digit code number and 15 telemetry conditions:
•  open/close
•  panic
•  alarm
• battery low/ restore
•  self-test
•  engineer test
•  telemetry 1
•  telemetry 2
•  telemetry 3
•  telemetry 4
•  telemetry 5
•  dedicated mains fail/restore
TX 790CID 
Reports a 4 digit code number, Contact ID and 2 hardwired
telemetry conditions:
•  panic
•  alarm
•  TIP
•  RING
Limited Contact ID interface support:
Up to 4 partitions are supported / reported
Up to 31 zones reported
(zone 32 reserved for universal or unknown zone)
Up to 15 users / key holders reported
(user 16 reserved for universal or unknown user)
TX 790 Serial 
Reports a 4 digit code number and Limited Contact ID
Serial interface support:
Up to 4 partitions are supported / reported
Up to 31 zones reported
(zone 32 reserved for universal or unknown zone)
Up to 15 users / key holders reported
(user 16 reserved for universal or unknown user)

Operation

  • Low battery and restore reporting.
  • Self test programmable between 1-250 hours.
  • Internal pull-up resistors for negative trip eliminates the need for external resistors.
  • A power-up signal is sent which can indicate that the transmitter has been tampered with by an insider.
  • A programmable mains fail/restore delay can be set from 15 – 250 minutes plus a random delay to prevent signal clashing. The factory default is 15 minutes plus the random delay. The installer, however, is able to test mains fail/restore signals without delay for thirty minutes after the installation.
  • Engineer test button.
  • Signal buffering – when inputs are triggered simultaneously they are stored in the transmitter and sent in priority order.
  • LED indicates 7 different transmitter conditions.