Standard horizon SCU-31 User Manual

SCU-31

GPS Antenna

External GPS Antenna

The SCU-31 is 66 channel GPS Antenna supplied with 49 feet of cable that plugs into your compatible
Standard Horizon VHF radio to enable AIS and DSC. The GPS antenna delivers accuracy better than
three meters by decoding the GPS correction signals from the SBAS (Satellite Based Augmentation
System). Please refer to the STANDARD HORIZON products catalog or web site for compatibility.

Owner’s Manual

The details of the installation and operation of the SCU-31 are included in the owner’s manual of

the compatible xed mount radio, or can be downloaded at www.standardhorizon.com.

Supplied Accessories

GPS Antenna Unit (49 feet cable) ......................................................................................................... 1

Antenna Base (Socket, Part number: RA6054200) .............................................................................. 1

Screws (M3X8 SUS, Part number: U20308020) .................................................................................. 3

2. Mount the antenna base to the antenna using the supplied three screws.

3. Screw the antenna base to the mounting bracket or extension pole.

4. Install the mounting bracket or extension pole in a location that has a clear view of the sky.

Flush Mounting the antenna

NOTE: Before drilling the mounting holes, it is

recommended to test the GPS antenna
satellite signal strength in the desired
location.

1. To ease installation use the supplied flush
mount template.

2. Apply the ush mounting template sticker.

3. Drill the 0.78” (20 mm) and 0.13” (3.2 mm)
holes, and remove the template.

4. Insert the cable into the 0.78” (20 mm) hole

and route to the transceiver.

5. Apply a small amount or RTV to the under­side of the antenna.

6. Place the antenna and screw into place us­ing the supplied screws.

Installing

The SCU-31 is designed to be mounted on a base, installed on an extension pole or ush mounted.

Choose a location for the antenna that has a clear view of the sky and is not located within 3 feet of

radar or other transmitting antenna. Ensure there are no major obstructions or xtures in the immedi­ate proximity to the antenna. The antenna relies on direct "line of sight" satellite reception. If you are
unsure of the location, temporarily mount the antenna to verify correct operation. If mounted close to a
radar, turn on the radar and check the GPS signal strength using the GPS Status Page on the VHF.

Base Mounting the antenna

The thread used on the base of antenna (1 inch, 14 TPI)

is an industry standard used on a wide range of commer-

cially available mounting brackets or extension poles.

Due to the manufacturing process of the mounting brack-

ets, the antenna may not tighten all the way down onto all

the threads. This is of no concern however as the anten­na must be tightened until the antenna stops rotating.

1. When passing the antenna cable through a mounting
bracket or extension pole, make sure to pass the ca­ble through the antenna base.

NOTE: ・ When routing the antenna cable along the

outside of the extension pole, pass the cable

through the groove as shown by the dotted

lines in the gure on the right. (Please cut the

blank panel with a long-nose pliers.)
The antenna cable can be cut and spliced to ease

・

installation. Care must be taken when reconnect­ing the antenna cable to protect from water and
corrosion.

Antenna Base

Antenna Cable

Pole

Template

φ3.2 mm [0.13 inch]

cut here

cut here

TEMPLATE for the SCU-31

φ3.2 mm [0.13 inch]

φ20 mm [0.78 inch] or greater

φ3.2 mm [0.13 inch]

Use this template to mark the
location where the hole for

the ush mount is to be cut.

Pin Assignment

①

②

③

④

⑤

⑥

DC INPUT (+10 to 35 VDC)

①

GPS DATA OUTPUT (+)

②

GND

⑥

Dimensions

85 mm

30 mm 60 mm

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,

there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Changes or modifications to this device not expressly approved by YAESU MUSEN could void the user’s

authorization to operate this device.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions; (1) this
device may not cause harmful interference, and (2) this device must accept any interference received, including

interference that may cause undesired operation.

Disposal of your Electronic and Electric Equipment

Products with the symbol (crossed-out wheeled bin) cannot be disposed as household waste.
Electronic and Electric Equipment should be recycled at a facility capable of handling these items
and their waste byproducts.

In EU countries, please contact your local equipment supplier representative or service center for

information about the waste collection system in your country.

Specications

Supply voltage ................................................................................. Normal: 13.8 VDC (Supplied from the transceiver)

Operating: 10 - 35 VDC

Power consumption .................................................................................................................................... 0.3 W (Max.)

Operating Temperature .......................................................................................... −4 °F to +140 °F (−20 °C to +60 °C)

Storage Temperature ............................................................................................−22 °F to +185 °F (−30 °C to +85 °C)

Receiving Frequency .................................................................................................................................. 1575.42 MHz

Receiving Code ....................................................................................................................................GPS: L1 C/A code

SBAS: WAAS, EGNOS, MSAS, GAGAN

Receiver Channels ........................................................................................................................................ 66 channels

Sensitivity .........................................................................................................................................Less than −147 dBm

Time to First Fix ....................................................................................................Hot start (Open Sky): 1 sec (approx.)

Cold start (Open Sky): 33 sec (typical)

Geodetic Datum .................................................................................................................................................. WGS84

Position Accuracy ..................................................................................................................................... 2.5 m (typical)

NMEA 0183 Output ................................................................................................. 4800 bps, 8 bits, no parity, 1stop bit

GGA, GLL, RMC, GSA and GSV

Dimensions ................................................................. 85 x 30 mm in height (ush mounted) or 60 mm on base mount

Weight (approx., without cable) ................................................................................................................... 3.2 oz (90 g)

Cable (approx.) ........................................................................................................................................... 49 feet (15 m)

YAESU MUSEN CO., LTD.

Tennozu Parkside Building

2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 Japan

YAESU USA

6125 Phyllis Drive, Cypress, CA 90630, U.S.A.

YAESU UK

Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.

QZSS

1611F-AS