Index

Radio Mobile Online

1. Signal Path Analysis
2. airLink Signal Path Analysis
3. KD7RYY to WA9ONY Path Analysis
4. WA7PTM to WA9ONY Path Analysis
5. K3RW to WA9ONY Path Analysis
6. Larch Mountain to KG7GDB Hill Path Analysis
7. Larch Mountain to KGI7OEK Path Analysis
8. Larch Mountain to Marys Peak Path Analysis
9. Larch Mountain to Bald Peak Scenic Viewpoint

Signal Path Analysis

There are tools to analyze the signal path between the transmitter and receiver.

• Link Budget Calculation presentation by ICTP.
  • Chapter 10 Deployment Planning, page 177-200 in the free Wireless Networking in the Developing World, Third Edition
• Path loss Wikipedia.
• Path loss presentation by Prof. Murat Torlak, EE4367.
• Best dBm Values for Wifi
• Radio Mobile and Radio Mobile Online.
  • The below two screen captures are
    Radio Mobile Online 2.3 GHz path analysis of WA9ONY QTH to
    Prune Hill, Dorothy Fox Elementary school north side of the school parking lot.
  • This signal path will be my first test paths.
  • Free space loss is 118.19 dB is dependent upon the 8.426 km distance and frequency of operation. The free Radio Mobile Online only supports up to 2.310 GHz amateur radio and not 2.4 GHz WiFi.
    • Free space loss for 2.45 GHz is 118.512 dB as compared to 2.31 GHz 118.19 dB.
    • Free space loss for 2.45 GHz in dB = 100 + 20*log(Distance in km).
  • WRT54GS Receive Signal Strength Indicator (RSSI) -35 to -85.

airLink Signal Path Analysis

airLink is a tools to analyze the signal path between the transmitter and receiver.

KD7RYY to WA9ONY Path Analysis

The above Google Earth map shows the elevation profile between KD7RYY and WA9ONY. Unfortunately I have obstructed path close to my QTH. KD7RYY is on HamWAN and AREDN network.

• Distance: 8.41 miles, 13.53 km.
• Heading to WA9ONY: 97.96 degrees.
• Heading to KD7RYY: 277.96 degrees.

WA7PPTM to WA9ONY Path Analysis

The above Google Earth map shows the elevation profile between WA7PPTM and WA9ONY

• Distance: 8.79 miles, 14.15 km.
• Heading to WA9ONY: 93.47 degrees.
• Heading to K3RW: 273.47 degrees.

K3RW to WA9ONY Path Analysis

The above Google Earth map shows the elevation profile between K3RW and WA9ONY

• Distance: 7.87 miles, 12.67 km.
• Heading to WA9ONY: 54.74 degrees.
• Heading to K3RW: 234.74 degrees.

Larch Mountain to KG7GDB Hill Path Analysis

The below Radio Mobile Online signal path analysis between Larch Mountain HamWAN cell site (5.88 GHz) and KG7GDB nearby hill.

Hill near KG7GDB QTH.

Radio Mobile Online signal path analysis from HamWAN Larch Mountain cell site to a nearby hill to KG7GDB QTH.

Signal path analysis for transmitter is a the HamWAN Larch Mountain cell site with a 120 degree sector antenna with 19 dBi gain. The modem is a MikroTik 5.88 GHz MIMO MikroTik RB912UAG-5HPnD Modem PCB. Details from HamWAN April 2018 Archives by thread at the bottom VOTE: Larch Mtn.

Larch Mountain user access sector cell site.

• Baltic Networks AM-5G19-120 Sector Antenna $116.00 1 $116.00
  • Unknown assumptions used in the analysis: TX line loss 1 dB, and TX antenna height 10 m.
  • The sector antenna gain is not known in this direction.
• Baltic Networks Maxxwave Shield $49.50 1 $49.50
• Streakwave RB912UAG-5HPnD Modem PCB $67.00 1 $67.00
  • Unknown assumptions used in the analysis: TX power 30 dBm based on 6 Bit/s.
• Streakwave SBX-S-CC-2SMA PCB Enclosure $25.65 1 $25.65

Signal path analysis for receiver is a QRT 5: RB911G-5HPnD-QRT with a 23 dBi antenna on a six feet tripod.

Larch Mountain to KGI7OEK Path Analysis

The below Radio Mobile Online signal path analysis between Larch Mountain HamWAN cell site (5.88 GHz) and KI7OEK QTH.

KI7OEK QTH.

Radio Mobile Online signal path analysis from HamWAN Larch Mountain cell site to KI7OEK QTH.

Signal path analysis for transmitter is a the HamWAN Larch Mountain cell site with a 120 degree sector antenna with 19 dBi gain. The modem is a MikroTik 5.88 GHz MIMO MikroTik RB912UAG-5HPnD Modem PCB. Details from HamWAN April 2018 Archives by thread at the bottom VOTE: Larch Mtn.

Larch Mountain user access sector cell site.

• Baltic Networks AM-5G19-120 Sector Antenna $116.00 1 $116.00
  • Unknown assumptions used in the analysis: TX line loss 1 dB, and TX antenna height 10 m.
  • The sector antenna gain is not known in this direction.
• Baltic Networks Maxxwave Shield $49.50 1 $49.50
• Streakwave RB912UAG-5HPnD Modem PCB $67.00 1 $67.00
  • Unknown assumptions used in the analysis: TX power 30 dBm based on 6 Bit/s.
• Streakwave SBX-S-CC-2SMA PCB Enclosure $25.65 1 $25.65

Signal path analysis for receiver is a QRT 5: RB911G-5HPnD-QRT with a 23 dBi antenna on a six feet tripod.

Larch Mountain to Marys Peak Path Analysis

The below Radio Mobile Online signal path analysis between Larch Mountain HamWAN cell site (5.88 GHz) and Marys Peak elevation 4,101 ft.

Parking lot on Marys Peak, OR.

Radio Mobile Online signal path analysis from HamWAN Larch Mountain cell site to Marys Peak, OR.

Signal path analysis for transmitter is a the HamWAN Larch Mountain cell site with a 120 degree sector antenna with 19 dBi gain. The modem is a MikroTik 5.88 GHz MIMO MikroTik RB912UAG-5HPnD Modem PCB. Details from HamWAN April 2018 Archives by thread at the bottom VOTE: Larch Mtn.

Larch Mountain user access sector cell site.

• Baltic Networks AM-5G19-120 Sector Antenna $116.00 1 $116.00
  • Unknown assumptions used in the analysis: TX line loss 1 dB, and TX antenna height 10 m.
  • The sector antenna gain is not known in this direction.
• Baltic Networks Maxxwave Shield $49.50 1 $49.50
• Streakwave RB912UAG-5HPnD Modem PCB $67.00 1 $67.00
  • Unknown assumptions used in the analysis: TX power 30 dBm based on 6 Bit/s.
• Streakwave SBX-S-CC-2SMA PCB Enclosure $25.65 1 $25.65

Signal path analysis for receiver is a QRT 5: RB911G-5HPnD-QRT with a 23 dBi antenna on a six feet tripod. It would be better to use a receiver with a 30 dBi antenna.

Larch Mountain to Bald Peak Scenic Viewpoint Path Analysis

The below Radio Mobile Online signal path analysis between Larch Mountain HamWAN cell site (5.88 GHz) and Bald Peak Scenic Viewpoint elevation 1,629 ft.

The trees to the east of the Bald Peak Scenic Viewpoint parking lot block the path to Larch Mountain, WA. The best position is in the woods. This position has telephone wires and tree tops in the path.

Radio Mobile Online signal path analysis from HamWAN Larch Mountain cell site to Bald Peak Scenic Viewpoint.

Signal path analysis for transmitter is a the HamWAN Larch Mountain cell site with a 120 degree sector antenna with 19 dBi gain. The modem is a MikroTik 5.88 GHz MIMO MikroTik RB912UAG-5HPnD Modem PCB. Details from HamWAN April 2018 Archives by thread at the bottom VOTE: Larch Mtn.

Larch Mountain user access sector cell site.

• Baltic Networks AM-5G19-120 Sector Antenna $116.00 1 $116.00
  • Unknown assumptions used in the analysis: TX line loss 1 dB, and TX antenna height 10 m.
  • The sector antenna gain is not known in this direction.
• Baltic Networks Maxxwave Shield $49.50 1 $49.50
• Streakwave RB912UAG-5HPnD Modem PCB $67.00 1 $67.00
  • Unknown assumptions used in the analysis: TX power 30 dBm based on 6 Bit/s.
• Streakwave SBX-S-CC-2SMA PCB Enclosure $25.65 1 $25.65

Signal path analysis for receiver is a QRT 5: RB911G-5HPnD-QRT with a 23 dBi antenna on a six feet tripod.