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)

Transmitters:

  • 427.25 MHz VSB AM modulation
  • 1245 MHz DVB-S digital QPSK modulation
  • 1260 MHz FM Modulation
  • 2433 MHz FM modulation
  • 10.350 GHz FM modulation

(Interdigital 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

Transmit antennas:

  • 427.25 MHz - Dual slot horizontally polarized 7 dBd gain major lobe west
  • 1245 MHz (DVB-S digital)- Diamond vertically polarized 12 dBd gain omni
  • 1260 MHz - (FM analog) - Diamond vertically polarized 12 dBd gain omni /li>
  • 2433 MHz - Comet Model GP24 vertically polarized 12 dBd gain omni
  • 10.350 GHz - Commercial 40 slot horizontally polarized waveguide antenna

Receivers:

  • 147.48 MHz for F1 audio input control of touch tones
  • 439.25 MHz for A5 video input with FM subcarrier audio (lower sideband)
  • 1280 MHz for DVB-S QPSK digital video
  • 2398 MHz for F5 video input

(Interdigital filters in input lines of all receivers)

Receive antennas:

  • 147.48 MHz - Vert. polar. Hi Gain 12 dBd dual band (also used for 446.350 MHz output)
  • 439.25 MHz - Horiz. polar. dual slot 7 dBd gain major lobe west
  • 1280 MHz - (DVB-S & analog shared) Diamond vertically polarized 12 dBd gain omni
  • 2398 MHz - Comet Model GP24 vertically polarized 12 dBd gain omni

Input control

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

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

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

Manual mode functions:

  • 00* then 1 Ch. 1 Select 439.25 receiver - manual mode (hit 00* then 1 to view 439.25 signal only)
  • 00* then 2 Ch. 2 Select 2411 receiver - manual mode
  • 00* then 3 Ch. 3 Select 1280 receiver - manual mode
  • 00* then 4 Ch. 4 (Not used at this time)
  • 00* then 5 Ch. 5 Select video ID - manual mode (the 4 identification screens)
  • 01* or 01# Channel 1 439.25 MHz scan enable (hit 01* to scan this receive channel & 01# to disable it)
  • 02* or 02# Channel 4 2398 MHz scan enable
  • 03* or 03# Channel 3 1280 MHz scan enable
  • 04* or 04#
  • A1* or A1# Manual mode select of 439.25 receiver audio
  • A2* or A2# Manual mode select of 2411 receiver audio
  • A3* or A3# Manual mode select of 1280 receiver audio
  • A4* or A4#
  • C0* or C0# Beacon mode – transmit ID for twenty seconds every ten minutes
  • C1* or C1# 427.25 transmitter “continuous ON/OFF” select
  • C2* or C2# (not currently used