Location
Site
- Downtown Columbus, Ohio
- Latitude: 39° 57′ 47″ N
- Longitude: 82° 59′ 58″ W
- Elevation: 630 ft above street level (760 ft ASL = 1,390 ft ASL total)
TV Transmitters
423.00 MHz — DVB-T
- Power: 10 W
- Const: QPSK • FFT: 2K • BW: 2 MHz
- FEC: 7/8 • Guard: 1/32
- PMT: 4095 • PCR: 256 • Vid: 256 • Aud: 257
427.25 MHz — Analog VSB AM
- Power: 50 W avg / 100 W sync tip
- Cable channel 58
1258 MHz — FM Analog
- Power: 40 W
1268 MHz — DVB-S QPSK
- Power: 20 W
- SR: 3.125 MS/s • FEC: 3/4
- PMT: 32 • Video: 162 • Teletext: 304
- PCR: 133 • Audio: 88 • Service: 5004
- Ch 1: fed from all receivers
- Ch 2: fed from 439.25 MHz analog receiver
2397 MHz — Mesh Net Transceiver
- Power: 600 mW (channel 1 minus 2)
- ID: WR8ATV-2
10.350 GHz — FM Analog
- Power: 1 W continuous
446.350 MHz — Link Transmitter
- Power: 5 W NBFM, 5 kHz audio
- Carries control signals
- Repeats 147.480 MHz and 449.975 MHz inputs
Identification
The 423, 427, 1258, 1268 MHz and 10.350 GHz transmitters send a video ID every 10 minutes when active video is present. The 423 MHz DVB-T, 1268 MHz DVB-S and 10.350 GHz FM transmitters transmit ATCO and WR8ATV continuously while an input signal is present.
Receivers
147.480 MHz
- F1 audio input, touch-tone control
- Output: 446.350 MHz link
439.000 MHz — DVB-T
- QPSK, 2 MHz BW
- Auto-configures FEC
- Output: all TV transmitters
439.250 MHz — Analog
- A5 NTSC video, FM subcarrier audio, upper sideband
- Output: all TV transmitters
- Also direct output to 1268 MHz DVB-S Ch 2
449.975 MHz
- F1 audio input (aux touch-tone), PL: 131.8 Hz
- Output: 446.350 MHz link
1288.00 MHz — Analog
- F5 video analog NTSC
- Output: all TV transmitters
1288.00 MHz — DVB-S QPSK
- SR: 4.167 MS/s • FEC: 7/8
- PMT: 133 • PCR: 33 • Vid: 33 • Aud: 49
- Output: all transmitters
10.450 GHz
- F5 video analog NTSC
- Output: all TV transmitters
Transmit Antennas
423.00 MHz
- Single slot rib cage, horizontally polarized
- 5 dBd gain, omni
427.25 MHz
- Dual slot, horizontally polarized
- 7 dBd gain, major lobe east/west
- 5 dBd gain north/south
1258 MHz
- Diamond, vertically polarized
- 12 dBd gain, omni
1268 MHz
- Diamond, vertically polarized
- 12 dBd gain, omni
2397 MHz — Mesh (Ch 1−2)
- Ubiquiti dual polarity omni, 13 dBi gain
- Used for Mesh Rx/Tx operation
2397 MHz — Mesh (experimental)
- Comet Model GP24, vertically polarized
- 12 dBd gain, omni
10.350 GHz
- Commercial 40-slot waveguide, horizontally polarized
- 16 dBd gain, omni
Receive Antennas
147.480 MHz
- Diamond, vertically polarized, 6 dBd dual-band
- Shared with 446.350 MHz link output transmitter
439.00 / 439.250 MHz
- Dual slot, horizontally polarized
- 7 dBd gain, major lobe west
- Shared — 439 digital & 439.25 analog receivers
1288.00 MHz
- Diamond, vertically polarized, 12 dBd gain, omni
- Shared — analog & DVB-S receivers
2398.00 MHz
- Comet Model GP24, vertically polarized, 12 dBd gain, omni
- Inactive (Mesh currently on 2397 MHz)
10.450 GHz
- Commercial 40-slot waveguide, horizontally polarized
- 16 dBd gain, omni
Touch-Tone Control
The repeater responds to DTMF tone sequences. When the third digit is * the function turns ON; when it is # the function turns OFF.
Auto Mode
00*— Transmitters on (enter manual mode)00#— Transmitters off (return to auto scan)264— Ch 4 Doppler radar (5 min;#to cancel)004— 10.450 GHz receiver (exit via001)001— 2398 MHz receiver; then00#to resume auto scan
Manual Mode — Channel Select
00* 1— Ch 1: 439.25 analog / 439 digital00* 2— Ch 2: 1288 digital receiver00* 3— Ch 3: 1288 analog receiver00* 4— Ch 4: 2398 receiver00* 5— Ch 5: Video ID (17 screens)
Manual Mode — Scan Enable
01* / 01#— Ch 1 (439.25/439) scan on/off02* / 02#— Ch 2 (1288 digital) scan on/off03* / 03#— Ch 3 (1288 analog) scan on/off04* / 04#— Ch 4 (2398 MHz) scan on/off
Manual Mode — Audio & Misc
A1* / A1#— Audio: 439.25 receiverA2* / A2#— Audio: 1288 digital receiverA3* / A3#— Audio: 1288 analog receiverA4* / A4#— Audio: 2398 receiverC0* / C0#— Beacon mode (ID 20 s every 10 min)C1* / C1#— No functionC2* / C2#— No function