Antenna Specifications; Installation Troubleshooting - Garmin GMR 620 xHD2 Series Installation Instructions Manual

Specification Measurement
Fuse Radar power cable, no voltage converter: 15 A
(included)
Radar power cable, with voltage converter (if
applicable): 7.5 A (included)
Voltage converter (if applicable): 15 A (not
included)
Input power GMR 424 and 426:
• Typical: 55 W
• Max.: 160 W
GMR 624 and 626:
• Typical: 65 W
• Max.: 170 W
GMR 1224 and 1226:
• Typical: 90 W
• Max.: 125 W
Range Pulse Width Pulse Repetition Frequency (PRF)
0.125 nm 70 µs 5120 Hz
0.25 nm 70 µs 5120 Hz
0.5 nm 80 µs 5120 Hz
0.75 nm 90 µs 5120 Hz
1 nm 150 µs 5120 Hz
1.5 nm 200 µs 3840 Hz
2 nm 250 µs 2560 Hz
3 nm 350 µs 2560 Hz
4 nm 400 µs 1280 Hz
6 nm 700 µs 1280 Hz
8 nm 700 µs 1280 Hz
12 nm 800 µs 1280 Hz
16 nm 1000 µs 640 Hz
24 nm 1000 µs 640 Hz
36 nm 1000 µs 640 Hz
48 nm 1000 µs 640 Hz
64 nm 1000 µs 640 Hz
72 nm 1000 µs 640 Hz

Antenna Specifications

Specification
Type
Horizontal beam width
Horizontal side lobes
Vertical beam width
Antenna gain
Polarization
Measurement
End-fed slotted waveguide
4 ft. antenna: 1.8º
6 ft. antenna: 1.1º
-23 dB within ±10º of main
-30 dB outside ±10º of main
23º
29 dB
Horizontal

Installation Troubleshooting

Symptom Possible Causes
The radar does • The power cable may not be connected correctly
not turn on. The to the device or to the battery. Check all
status LED is not connections.
on.
• The inline fuse may have blown. Check the fuse
and replace it if necessary.
• The wire gauge used to extend the power cable
may be too small for the length of the extension.
Check the table provided in the Power Cable
Extensions section of these instructions to make
sure the correct wire gauge is used
Extensions).
• If the radar uses a voltage converter, it may be
connected through an incompatible or third-party
voltage converter. Use only the voltage converter
supplied with the radar.
The radar is not • The radar may not be powering on. Check the
available on the status LED.
Garmin device or
• The device software may not be up-to-date.
on devices
Update the software on the device or on the
connected to the
Garmin Marine Network.
Garmin Marine
• The network cable may not be connected
Network.
correctly to the device or to the Garmin Marine
Network. Check all connections.
• If a field-installable network connector was used, it
may have been installed improperly. Check the
connector.
The status LED is located on the product label, and can help
troubleshoot installation problems.
Status LED Color Radar Status
and Activity
Solid red The radar is getting ready for use. This should
only stay red briefly before changing to flashing
green.
Flashing green The radar is operating properly.
Flashing orange The radar software is being updated.
Flashing red The radar has encountered an error. Contact
Garmin product support for assistance.
(Power Cable
7