ATCO REPEATER TECHNICAL DATA SUMMARY

Location:

Downtown Columbus, Ohio

Coordinates:

82 degrees 59 minutes 53 seconds (longitude) 39 degrees 57 minutes 45 seconds (latitude)

Elevation:

630 feet (48 floors) above average street level (1460 feet above sea level)

TV Transmitters:

  • 427.25 MHz AM modulation
  • 1258 MHz FM Modulation
  • 1268 MHz QPSK digital modulation
  • 2433 MHz FM modulation
  • 10.350 GHz FM modulation

(Multiple filters in output line of all transmitters)

Output Power

  • 427.25 MHz: 50 watts average 100 watts sync tip
  • 1245 MHz: 15 watts average (Bird measurement), 2 watts peak
  • 1260 MHz: 50 watts continuous
  • 2433 MHz: 15 watts continuous
  • 10.350 GHz: 1 watt continuous

Link transmitter

  • 446.350 MHz 5 watts NBFM 5 kHz audio

Identification:

427, 1258, 1268, 2433, 10.35GHz Transmitters video identify every 30 minutes with ATCO and WR8ATV on 17 different screens.

1268 MHz and 10.35 GHz - Continuous transmission of ATCO and WR8ATV with no input signal present.

Transmit antennas:

  • 427.25 MHz - Dual slot horizontally polarized "omni" 7 dBd gain major lobe east/west, 5db gain north/south
  • 1258 MHz - Diamond vertically polarized 12 dBd gain omni (Analog ATV)
  • 1268 MHz - Diamond vertically polarized 12 dBd gain omni (Digital DVB-S ATV)
  • 2433 MHz - Comet Model GP24 vertically polarized 12 dBd gain omni
  • 10.350 GHz - Commercial 40 slot waveguide horizontally polarized 16dBd gain omni

Receivers:

  • 147.48 MHz - F1 audio input with touch tone control
  • 439.25 MHz - A5 video input with FM subcarrier audio (lower sideband)
  • 449.975 MHz - F1 audio input aux touch tone control (An input here generates an output on 446.350.)
  • 1280 MHz - F5 video input or DVB-S digital (digital input fed direct to 1268 MHz digital output channel 2)
  • 2398 MHz - F5 video input
  • 10.450 GHz -F5 video input (not installed yet)

Receive antennas:

  • 147.48 MHz - Vert. polar. Diamond 6dBd dual band (also used for 446.350 MHz link output)
  • 439.25 MHz - Horizontally polarized dual slot 7 dBd gain major lobe west
  • 1280 MHz - Diamond vertically polarized 12 dBd gain omni
  • 2398 MHz - Comet Model GP24 vertically polarized 12 dBd gain omni
  • 10.450 Ghz - Commercial 40 slot waveguide horizontally polarized 16 dBd gain omni (not installed yet)

Input control

Touch Tone Result (if third digit is * function turns ON, if it is # function turns OFF)

00* transmitters ON (enter manual mode - keeps transmitters on till 00# sequence is pressed)

00# transmitters OFF (exit manual mode and return to auto scan mode)

264 Select Channel 4 Doppler radar. (Stays up for 5 minutes) Select # to shut down before timeout.

697 Select Time Warner radar. (Stays up till turned off). Select # to shut down.

Manual mode functions:

  • 00* then 1 for Ch. 1 Select 439.25 receiver
  • 00* then 2 for CH. 2 Select Unused at this time
  • 00* then 3 for Ch. 3 Select 1280 receiver
  • 00* then 4 for Ch. 4 Select 2411 receiver
  • 00* then 5 for Ch. 5 Select video ID (the 4 identification screens)
  • 01* or 01# Channel 1 439.25 MHz scan enable (hit 01* to scan this receive channel and 01# to disable it)
  • 02* or 02# Channel 2 (not in use at this time)
  • 03* or 03# Channel 3 1280 MHz scan enable
  • 04* or 04# Channel 4 2398 MHz scan enable
  • C0* or C0# Beacon mode – transmit ID for twenty seconds every ten minutes
  • C1* or C1# C1* to disable 427 transmitter, C1# to enable it.
  • C2* or C2# C2* to disable 1258 transmitter, C2# to enable it.