North Star GM9571M Installation manual

957 GPS/W

AAS

C

HART

N

AVIGATOR

I

NSTALLATION

M

ANUAL

Revision C1

Part Number GM957IM

Northstar Technologies

30 Sudbury Road

Acton, Massachusetts 01720

800/628-4487

978/897-6600 www.northstarcmc.com

Limited warranty policy

Northstar Technologies, Inc. warrants the Northstar 957 to be free from defects in materials and workmanship for a period of two (2) years. This warranty applies to the original purchaser and to any subsequent owner during the warranty period, which begins on the date of shipment of the unit,

F.O.B. Acton, Massachusetts, to an authorized Northstar dealer.

Systems may not be returned to Northstar without a Returned Materials Authorization (RMA) number. Call the Northstar dealer or Northstar for instructions.

During the unit’s warranty period, Northstar will repair or replace, at its option, any part of the unit it finds to be defective due to faulty material(s) or workmanship. All such repairs and/or replacements will be promptly performed by Northstar free-of-charge to the owner, excluding freight costs incurred in shipping to the factory. Return shipments from Northstar to points within the United

States are made via ground transportation, freight prepaid. Special shipping charges (overnight, two-day, and so on) are the responsibility of the owner.

To be covered by this warranty, the Northstar equipment must have been in normal use. This warranty does not apply to units with defects caused by improper installation, physical damage, abuse, tampering, lightning or other abnormal electrical discharge, or to units with defaced or altered serial numbers, or to units repaired by unauthorized persons or repaired in a manner that violates Northstar’s recommended service procedures.

All repairs and/or replacements made under this warranty must be performed at Northstar’s facilities in Acton, Massachusetts. Performance of warranty work elsewhere will not be authorized, and Northstar will not pay for any charges for such work. Northstar will not be responsible for payment of any charges imposed by a Northstar dealer or other party for services requested by and/or performed for a unit’s owner in connection with this warranty. Such services might include removal of the unit from a vessel, inspection, packaging, handling, reinstallation, and the like.

Northstar Technologies assumes no responsibility for any consequential losses of any nature with respect to any of its products or services sold, rendered, or delivered. The foregoing is the only warranty expressed or implied. No other warranty exists.

Contents

SECTION ONE: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Welcome to the Northstar 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Who should read this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Scope of this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Major installation steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SECTION TWO: Installing and wiring the 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Bench-testing the 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Mounting the 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Wiring the 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

SECTION THREE: Installing and wiring the 2201 . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Introducing the 2201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Installing the 2201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Wiring the 2201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

SECTION FOUR: Installing and wiring the 2701 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Introducing the 2701 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Installing the 2701 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Wiring the 2701 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Installing the AN205-P antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

SECTION FIVE: Checking out the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Inserting a chart cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Turning the 957 on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Installation-test checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

SECTION SIX: Interfacing the 957 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Wiring the connector pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Configuring the NMEA output ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Using 200 ppnm output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Configuring the RS-232 port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Connecting the 957 to a remote display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Connecting the 957 to a video camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Connecting with a radar device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Connecting two Northstar units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Setting the anchor-watch alarm honk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

SECTION SEVEN: Troubleshooting and servicing the 957 system. . . . . . . . . . . 55

Troubleshooting 957 installation problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Getting technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Servicing the 957 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Returning a 957 system for service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Maintaining the 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

APPENDIX A: 957 system technical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . 63

SECTION ONE:

Introduction

Welcome to the

Northstar 957

The Northstar 957 is a full-featured color GPS/WAAS vector chart navigator. The 957 can be connected with a variety of optional equipment such as the Northstar 490 echo sounder, and with VGA output equipment such as the Northstar 1201 remote display. Other optional interfaces include any

NTSC-compatible video input equipment (such as a video camera, TV, DVD, or VHS), and the optional Northstar 2701

DGPS/WAAS receiver (used instead of the standard 2201) for

WAAS and GPS plus radiobeacon differential.

Who should read this manual

The

Northstar 957 Installation Manual

is for marine technicians who are installing, interfacing, and troubleshooting the

Northstar 957 GPS/WAAS chart navigator system and other optional compatible equipment.

957 Installation Manual, Revision C1 Page 1

SECTION ONE: Introduction

Scope of this manual

For instructions on using the 957, see the

Northstar

957 Operator’s Manual

(part number GM957UG)

In this manual, you’ll find information about the following topics:

•

wiring and installing the 957

•

wiring and installing the 2201 antenna or optional 2701

DGPS/WAAS receiver

•

configuring the NMEA ports for NMEA 0183 devices

•

configuring the AUX port for the optional 490 echo sounder

•

interfacing the 957 with an optional remote display

•

NTSC video inputs for docking, engine room, security, entertainment, etc.

•

testing and troubleshooting the 957 installation

•

the technical specifications for the 957, 2201 antenna, and

2701 receiver

For instructions on connecting the 957 to the Northstar 490 echo sounder, see the


(part number GM491), included in the 490 shipping carton.

Major installation steps

The following list of recommended installation steps isn’t a substitute for all the details in this manual. To ensure that you meet all of the installation requirements, be sure to read this entire manual and follow its recommendations closely.

Northstar suggests following the steps as outlined below.

PRE-INSTALLATION:

Step 1. Check the shipping carton for any damage, and immediately report any damage to the carrier. Save all packing material in case you have to return any system components to the Northstar factory for service.

Step 2. Fill out the warranty card and mail it to Northstar.

Step 3. Unpack the carton, and check its contents. You should have received the following parts:

•

957 unit

•

flush-mount hardware kit (P/N 957PK)

•

flush-mount gasket (P/N HG366)

•

10-foot interface cable (P/N WA215)

•

10-foot power cable (P/N WA535-A)

Page 2 957 Installation Manual, Revision C1


•

sunshield (P/N XP600)

•

warranty registration card (P/N GD671)

•


(P/N GM957IM)

•

Northstar 957 Flush-Mounting Template

(P/N GT957)

•

Northstar 957 Operator’s Manual

(P/N GM957UG)

•

2201 WAAS/GPS antenna

•

50-foot 2201 data/power cable (P/N 957POD-CA)

•

2201 mounting screws (3 of each, P/N HS520)

•

2201 washers (3 of each, P/N HW500)

•

cable heat shrink (P/N HM1005)

•

cable heat shrink (P/N HM509)

•

6-pin cable connector for AUX port (P/N KS672)

•

optional 2701 beacon receiver, including:

-

AN205-P GPS/DGPS antenna

-

50-foot AN205-P antenna cable (P/N WC-256)

-

10-foot data/power cable (P/N 957BDM-CA)

•

optional 957 yoke-mount kit (P/N 601YOKE-IK)

•

optional remote control and batteries (P/N 957RC)

NOTE:

The cables and connectors for the 957’s VIDEO connector (input, BNC) and VGA connector

(output) aren’t supplied by Northstar, since the required cables will depend on the particular installation. The installer must provide these cables.

957 Installation Manual, Revision C1

NOTE:

If you’re installing the optional Northstar 490 echo sounder, you’ll find the 490 and its components in the separate 490 shipping carton.

MOUNTING AND WIRING:

Step 1. Review all of the installation requirements as described in

Section Two and Section Three.

Step 2. Make sure you have all the right tools before starting the installation.

Step 3. Install the 957—see “Mounting the 957” beginning on page 6.

Step 4. Install the 2201 and cable— see “SECTION THREE:

Installing and wiring the 2201” beginning on page 17; or

else install the optional 2701—see “SECTION FOUR:

Installing and wiring the 2701” beginning on page 25.

Page 3


Step 5. (Optional) Install and connect the Northstar 490 Echo

Sounder. For instructions, see the

Northstar 490

Installation Manual

(part number GM491).

Step 6. Connect the 957 to ship’s power, the 2201 or 2701, and

optionally, the 490—see ”Wiring the 957” on page 13.

POWERING UP AND INTERFACING:

Step 1. Turn on the 957—see ”SECTION FIVE: Checking out the system” starting on page 31.

Step 2. Check that the system is running properly by performing a functional test, including checking for GPS/WAAS signals.

For help, see ”Installation-test checklist” on page 37, and

Table 10, “Troubleshooting the 957 installation,” on page 55.

Step 3. (Optional) Connect the 957 to a remote display or a video

source such as a video camera—see ”SECTION SIX:

Interfacing the 957 system” starting on page 39.

Step 4. Configure the NMEA output ports

—

see ”Configuring the

NMEA output ports” on page 41, and the RS-232

port—see ”Configuring the RS-232 port” on page 47.

NOTE:

USING THE 957’S REMOTE CONTROL

The 957’s optional remote control will operate all of the 957’s controls except for the

PWR

key. You can’t use the remote control to turn the 957 on or off.


SECTION TWO:

Installing and wiring the 957

Safety considerations

WARNING!

Before starting the installation, be sure to turn power off. Further, Northstar highly recommends keeping power off while you’re installing the system. If power is left on or turned on during the installation, fire, electrical shock, or other serious injury may occur.

Be sure that the voltage of the power supply is compatible with the 957’s voltage rating—10 to 36 volts DC. Connecting to the wrong power supply can cause fire or damage to the equipment. Be sure to ground the equipment to prevent electrical shock and mutual interference.

Be sure to use the proper fuse. Using the wrong fuse can cause fire or damage to the 957.


SECTION TWO: Installing and wiring the 957

CAUTION!

Make sure that the 957 doesn’t interfere with any other on-board systems. Check all other systems to ensure that their performance doesn’t degrade when the 957 is turned on.

CAUTION!

Proper installation of the Northstar 957 is critical to accurately receive and effectively use GPS/WAAS signals under a wide variety of weather conditions.

Bench-testing the

957

Northstar recommends bench-testing the 957 before installing it onto the vessel. Bench testing ensures that the equipment is fully operational, and lets the 2201 antenna or 2701 beacon receiver collect the current almanac and ephemeris data for the installed location, which results in less on-board installation time.

Mounting the 957

Choosing the best location

Choose the mounting location carefully—before you drill or cut.

The display screen is high-contrast and anti-reflective, and is viewable in direct sunlight, but for best results, install the 957 out of direct sunlight. See the figure below for additional mounting recommendations.



Regardless of the type of mounting, the 957 should be installed in an accessible location

(dry) where the operator can easily use the controls and clearly see the display screen. Be sure to leave a direct path for all of the cables.

Regardless of the type of mounting, the location should have minimal glare from windows or bright objects. If the 957 is yoke-mounted low, tilt the

957 back for best viewing contrast.


Figure 1: Mounting recommendations

Page 7


CAUTION!

Keep the following safe compass distance from the

957: 1.0m standard, 0.8m steering.

Flush-mounting the 957

When flush mounting, leave

at least two and a half inches of clearance space

behind the mounting panel for all of the cables and connectors.

Flush mounting requires good ventilation behind the mounting panel. Poor ventilation will cause the 957 to overheat, which, in turn, may cause the display screen to darken.

Figure 4 below shows the overall width and height

requirements for flush-mounting the 957. For further details, see the full-size

Northstar 957 Flush-Mounting Template

(part number GT957). This template should be used to drill the mounting holes and cut the mounting panel in the exact recommended locations.

CAUTION!

When flush mounting, be sure to mount the 957 on a flat surface. Mounting on a curved surface can break or distort the plastic and break the waterproof seal.

Do not overtighten the mounting screws; you may damage the case and compromise its waterproof seal.

This type of physical damage will void the warranty.




Figure 2: 957 flush-mount clearance dimensions

Page 9


Yoke-mounting the 957

Before drilling, turn the 957 to the desired angle on the yoke to make sure there’s enough space for the cables. Leave clearance space as follows:

•

at least 2 inches of space all around the sides and the top

•

at least 2.5 inches of space in the back for all of the cables and connectors

•

at least 2.25 inches of space in the front for opening and closing the chart cartridge door and inserting and removing a chart cartridge

For an illustration of the recommended clearances, see Figure 3

and Figure 4 on the following pages.


1.9”

6.1”


12.4”

2.3”


2.5

8.2”

Figure 3: 957 yoke-mount dimensions (side)

Page 11


13.5”

12.4”

Page 12

11.6”

Figure 4: 957 yoke-mount dimensions (front)



Wiring the 957

Avoiding cable wiring shortcuts

Most installation problems are caused by shortcuts taken with system cables. When wiring the 957, follow the guidelines

illustrated in Figure 5 below.

DON’T DO THIS!

Do not make sharp bends in the cables

Do not run cables in such a way that might allow water to flow down into the connectors

DO THIS!

•

•

•

•

Do make drip and service loops

Do tie-wrap all cables to keep them secure

If cables are shortened, lengthened, or re-terminated, do seal and protect all wiring connections

Do leave room at the back to service the 957

Figure 5: Avoiding cable wiring shortcuts



Understanding the interface connectors

All of the 957’s interface connectors are shown in Figure 6:

”Interface connectors (back of 957),” below. The function of these connectors is described in Table 1, below.

AUX connector

VGA connector

Power connector GPS connector

NMEA connector VIDEO connector

Page 14

Figure 6: Interface connectors (back of 957)

Connector name

NMEA (NMEA I/O)

(18-pin port)

GPS (Antenna)

(7-pin RS232 port)

Table 1: Interface connector functions

Connector function(s)

NMEA 1 input/output -------------->

Connects to...

NMEA devices: autopilots, etc.

NMEA 2 input/output --------------> same as NMEA 1

Honk alarm/200 ppnm ------------> Remote honk alarm (or speed indicator)

GPS/WAAS input/output ---------> 2201 antenna

Beacon input/output -------------->

- or -

Northstar 2701 beacon receiver (optional)



Table 1: Interface connector functions (continued)

Connector name

AUX (Auxiliary)

(6-pin auxiliary NMEA port)

Connector function(s) Connects to...

RS-422/NMEA input/output -----> Northstar 490 echo sounder (optional)

- or -

PWR (Power)

VGA

(15-pin port)

VIDEO

(coaxial)

Power

Video output

Video input

A second 957 (or to a Northstar 952/951/

941) for the waypoint-and-route transfer function

10 to 36 VDC

Remote display

Any NTSC-compatible device

Electrical power requirements

Power source

The 957 is a negative-ground system that’s reverse-polarity protected. DC power is required from a 10-volt minimum to a

36-volt maximum using at least 16-gauge connecting wire.

CAUTION!

As a good safety practice, Northstar strongly recommends that you connect the 957 to a circuit breaker or 20-amp fuse at the power source

(battery).

Connecting the 957 to ship’s power

A 10-foot power cable is shipped with the 957 system. You can lengthen this cable to a

maximum

of 25 feet:

•

for a cable length up to 15 feet, the power connections must use 16-gauge connecting wire or heavier

•

for a cable length from 15 to 25 feet, use 14-gauge connecting wire or heavier

If you lengthen the power cable, use an external fuse at the battery end as an added safety precaution.

The fuse size should match the size of the wiring on the vessel

. See the

NMEA or the American Boating and Yachting Counsel specifications to find the correct fuse to use with your cable.

For the best protection from noise, connect the power cable directly to the battery or dedicated electronics buss. The green ground wire should be connected to ship’s ground directly.



The power cable has an inline fuse to protect the vessel’s wiring, prevent electrical fires, and prevent damage to the 957.

If you shorten this cable, be sure to keep the inline fuse intact.

The wires in the power cable must be connected as follows.

•

red

→

positive(+)

•

black

→

negative(–)

•

green

→

ship’s ground

NOTE:

Ground the 957 to the vessel to eliminate interference. Without an earth grounding, performance may be reduced. Secure the green wire to the vessel’s nearest grounding point. If a noise-free earth grounding point isn’t available, cap and insulate the green wire—it shouldn’t be used when an earth ground isn’t available, or with systems using “floating” grounds.


SECTION THREE:


Introducing the

2201

The Northstar 2201 GPS pod is a self-contained, high performance GPS antenna/receiver that also receives Wide Area

Augmentation System (WAAS) differential correction signals.

When connected to the 957, the 2201 provides the 957 with

WAAS-enhanced GPS position information.

For the 2201’s technical specifications, see Table 15, “2201 technical specifications,” on page 64.

CAUTION!

Do not open the 2201: There aren’t any serviceable parts inside. Unauthorized tampering will automatically void the warranty.


SECTION THREE: Installing and wiring the 2201

Installing the

2201

NOTE:

Before permanently installing the 2201, try temporarily installing it and using the 957 to see if the 2201’s location works well.

2201 parts list

The 2201 includes the following parts (see Figure 7: ”2201 antenna components,” below):

•

2201 GPS/WAAS pod

•

3 mounting screws (10-32 UNF) and 3 washers for deck mounting

•

50-foot 2201 cable (both ends have waterproof 7-pin connectors)

2201 GPS/WAAS pod

50-foot 957POD-CA cable (with two finished connectors)

Choosing the best mounting location

3 mounting screws and 3 washers

Figure 7: 2201 antenna components

Before you drill or cut

, choose a mounting location that meets the following criteria. The 2201 should be mounted:

•

where there’s enough mounting clearance to easily connect the cable.

•

low on the vessel, since side-to-side motion caused by the vessel’s rolling can degrade speed-over-ground (SOG) and course-over-ground (COG) readings.



•

below the radiation plane of any INMARSAT or radar antennas, and away from any other high-power

transmitting antennas (see Figure 8 on page 19).

•

high enough to provide an unblocked view of the sky in all directions, and that minimizes or eliminates any objects that block the 2201’s view of the sky (the 2201 uses satellites down to zero degrees elevation or to the horizon).

•

away from masts or objects that could “shadow” the 2201, but where there’s an adequate view of the sky.

To avoid mutual interference among different antennas on the

vessel, see the recommendations in Figure 8 below. This figure

shows the minimum distances that should separate GPS/WAAS antennas from other antennas and physical mounting surfaces.

Normally, these guidelines produce a relatively trouble-free installation. However, you may want to adjust these distances to the particular equipment, since every installation is unique.

Figure 8: Recommended separation distances between antennas


You can mount the 2201 in one of two ways:

•

onto a standard antenna mast

•

onto a flat surface



An optional magnetic mount adapter (Northstar part number AM110) is available for certain installations. To order, call the Northstar Sales

Department.

Using a standard antenna mast

❶

Using the 1”x 14 marine-industry standard UNS thread mounting, install the base of the 2201 onto a standard antenna mast.

Do not overtighten or you may damage the housing!

❷

To avoid stressing the 2201’s connector with the weight of the cable, use a tie-wrap or similar near the 2201 to hold the cable’s weight.

4.50” (114mm)

Figure 9: Mounting position for a standard mast mount

Using a flat surface

You can mount the 2201 onto a deck or any other flat surface:

❶

Using the three screws and washers provided, mount the

2201 onto the flat surface using three holes on a 1.75-inch

diameter circle (see Figure 10 below).



φφφφ

1.750

1.00 -14UNS-2Bx 1.00 deep.

3x 3/16” - 32UNF - 2B x .48 deep. Mounting holes equally spaced around a

1.75” diameter circle.

Connector receptacle with 7 male contacts. Mating:

Switchcraft EN3C7FC or equivalent.

Figure 10: Mounting on a flat surface (viewed from below)

❷

Make sure the 2201 has enough mounting clearance so that you can easily connect the cable. For example, mount the 2201 on the edge of the deck, or drill a small hole in the deck or other surface to allow the cable to pass through.

Wiring the 2201

Connecting the 2201 to the

957

NOTE:

You can shorten the 957POD-CA cable, but do not lengthen it.

The cable must be a maximum of 50 feet.

The 50-foot 957POD-CA cable connects the 957 with the 2201.

Both ends of the cable are finished with 7-pin connectors that plug into the 2201 and 957:

1.

Plug the 2201 end of the cable into the 2201, and the

957 end into the 957 connector labelled “GPS.” Note: The cable’s connectors may look the same, but they are not interchangeable.



2.

Coil any extra 2201-CA cable away from the 2201. Don’t pinch the cable or make any sharp bends, and don’t run the cable where it interferes with any controls.

Re-fabricating the 957 connector (optional)

If you want to shorten the cable or remove its connector to make more room to snake the cable, you can remove the connector from the 957 end and then replace it:

1. After shortening or snaking the cable, slide the available heat shrink tubing onto the cable, then slide the connector backshell onto the cable, as shown below.

Page 22

2. Prepare each wire for insertion into its solder cup by stripping it and tinning it.

3. Carefully solder each wire to the appropriate

cup, as described in Table 2 below.

4. Slide the backshell down the cable and screw it onto the connector body. It should be hand tight.

5. Using the supplied screws, screw the strain relief onto the backshell.

6. Slide the heat shrink tubing onto the connector. Be sure to leave room for the locking collar to retract.

7. Heat the shrink tubing until it shrinks around the connector, providing a watertight seal.

For the pin numbers and functions for the 957 end of the cable,

see Table 2 below.

Table 2: Wiring connections for 2201 cable

Description

RS232 RX1 (Main receive port)

RS232 RX2 (Aux receive port)

RS232 TX1 (Main transmit port)

Signal gnd

Wire color Pin

Blue 1

Orange

Green

Brown

2

3

4


Selecting differential options


Table 2: Wiring connections for 2201 cable (cont.)

Description

Remote power-on

Ship’s power control

Power gnd

(system gnd)

Power in (9-36 VDC)

Wire color Pin

Black 5

White

Red

6

7

The 957 has four settings for differential operations. For

instructions on choosing the correct setting, see ”Selecting differential options” starting on page 36.




SECTION FOUR:


Introducing the

2701

The Northstar 2701 is a high-performance, fully automatic

12-channel GPS/WAAS receiver and a two-channel beacon receiver packaged into a self-contained enclosure. The 2701 receives differential corrections from ground-based radiobeacons as well as from satellites transmitting WAAS differential signals.

For the 2701’s technical specifications, see Table 16, “2701 technical specifications,” on page 65.

CAUTION!

Do not open the 2701: There aren’t any serviceable parts inside. Unauthorized tampering will automatically void the warranty.


SECTION FOUR: Installing and wiring the 2701

Installing the

2701

2701 parts list

Choosing the 2701 mounting location


The 2701 includes the following parts:

•

2701 DGPS/WAAS receiver

•

10-foot data/power cable for connecting the 2701 to the

957 (both cable ends are finished)

•

AN205-P GPS/DGPS combination antenna

•

50-foot antenna cable for connecting the 2701 to the

AN205-P (both cable ends are finished)

The 2701 is housed in a rugged aluminum enclosure with a mounting flange, gaskets, and watertight connectors. Though designed to withstand the marine environment, the unit is not completely waterproof. Protect the 2701 by installing it where water won’t contact it directly or enter it by following data/ power or antenna cables.

You can mount the 2701 either horizontally or vertically using

the appropriate mounting holes—see Figure 11 on the next

page.

Keyhole slots at the rear will help if you’re installing the 2701 where access is limited and it’s hard to start the mounting screws at the obstructed end. Securely tighten all mounting screws to avoid vibration-related problems.



Figure 11: 2701 case and mounting dimensions

Wiring the 2701

Connecting the 2701 to the

957

The 10-foot 957BDM-CA cable connects the 957 with the 2701.

Both ends of the cable are finished with connectors that plug into the 2701 and 957. Plug the cable’s 25-pin connector into the 2701, and the 7-pin connector into the 957 connector labelled “GPS.”

In case you have to remove one of the cable’s connectors, be sure to re-fabricate the cable using the wiring connections described in the table below.

Table 3: Wiring connections for 2701 cable

957 connector (7-pin)

1

2


7

21

Function

GPS RX1 (Blue)

BDM RX1 (Orange)



Table 3: Wiring connections for 2701 cable (cont.)


6

7

6

NC

3

4

5


6

20

12

13

25

NC

KS131

Function

GPS TX1 (Green)

BDM TX1 (Brown)

Power CTL (Black or Gray)

GND (White)

Power + (Red)

Drain Wire

Foil Shield

NOTE:

Double-check all wiring if you re-fabricate the cable. A small, but significant, number of 2701’s are damaged due to incorrectly wired connections.

Such damage is not covered under warranty. Be sure you aren’t applying primary voltage directly to any of the 2701’s signal input/output wires. This may vaporize the internal circuit board conductors.

Installing the

AN205-P antenna

Choosing the antenna’s mounting location

The 2701 operates with Northstar’s AN205-P “combo” GPS/

DGPS antenna. Mount the antenna high enough to clear any objects and get an unobstructed view of the horizon in all directions. Mount it low enough on the vessel to avoid extra motion from pitching and rolling, and lower than any high-power transmitting antennas, such as radar or satcom (see

Figure 8 on page 19 for recommended separation distances

between antennas). Keep the antenna at least six feet away from objects that can “shade” GPS or differential signals.

NOTE:

Before permanently installing the AN205-P, try temporarily installing it and using the 957 to see if the antenna location works well.



CAUTION!

Don’t mount the antenna near rotating warning beacons or strobe lights, electric motors, fluorescent lights, or other RF sources. These can create RF interference to the differential reception.

If position data is intermittent, make sure you have the proper cable length, and verify the quality of the antenna location and the quality and proper termination of the connectors. Also, make sure that the 2701’s ground lug terminal is securely connected with a heavy gauge conductor to ship’s ground.

7.00

2.5

Use the locking nut shown to prevent rotation of the antenna or bottoming out of the mounting stanchion into the threaded mount portion of the antenna.

If done with enough force, either of these may break the antenna.

TNC

3.5

Figure 12: Northstar AN205-P antenna dimensions

Connecting the 2701 to the antenna

The 50-foot antenna cable connects the 2701 with the

AN205-P antenna. The cable length must be a maximum of 50 feet but can be shortened to the desired length.

Note: Installations that require a cable length from 50 to 100 feet should order the AN206 combo antenna and a 100-foot length of coaxial cable from the Northstar Sales Department.

Don’t make any tight bends in the cable, and fasten it along its length to avoid chafing or whipping or any kind. Coil up any unused length of cable. Be sure that the cable connectors are securely fastened.




SECTION FIVE:

Checking out the system

Inserting a chart cartridge

The cartridge slot is located at the lower left-hand corner of the

957. Before inserting a Navionics chart cartridge, make sure its label is facing up and that the cartridge is oriented as shown in

Figure 13 below. Insert the cartridge gently but firmly into

position with one straight, smooth motion. If you only partially insert the cartridge, stop, then move the cartridge again, it may get stuck in an awkward position.

957 INSTALLATION MANUAL, Revision C1 Page 31

SECTION FIVE: Checking out the system

The Navionics chart cartridge must stay free from debris and moisture at all times. To ensure that you don’t expose the cartridge to any environmental damage, please use caution when changing the cartridge. Be careful when inserting the cartridge into the 957

(see description above and illustration at right).

When you’re not using the cartridge, store it in a clean, dry place away from heat, humidity, and dust. Improper handling and storage of the cartridge may damage the 957. Such damage isn’t covered under the 957 warranty.

Figure 13: Properly inserting a chart cartridge

Page 32 957 INSTALLATION MANUAL, Revision C1


Turning the 957 on and off

To turn on the 957, briefly press the

PWR

key. The 957 emits several short beeps as it displays the

START-UP

screen, then the

957 performs a series of self-tests to check its critical components and functions.

Next, a message is shown as a reminder against relying on the

957’s chart cartography as the only means of safe navigation.

957 INSTALLATION MANUAL, Revision C1

To continue, accept the warning message by pressing any one of the five function keys (

CHART

,

STAR

,

STEER

,

NAV LOG

, or

WAYPTS/ROUTES

) located below the display screen.

NOTE:

A brief warm-up period may be required for the display screen to reach its full intensity.

To identify the cartridge inside the 957, press the

CHART

SETUP

menu key to the right of the

CHART

screen to display the

CHART STATUS

screen (the cartridge door must be fully closed and latched to display this information):

Page 33


•

if a cartridge is inside, the cartridge name and date are shown on the left of the

CHART SETUP/STATUS screen

(screen at left, below).

•

if a cartridge isn’t installed or is installed incorrectly, the words

NONE INSERTED

are shown (screen at right, below).

NONE

INSERTED

Checking satellite status

The cartridge name comes from its Navionics catalog number.

Not all cartridges will have a date, especially older ones; in this case, only the word

PRESENT

is shown rather than the name and date.

.

The 957 uses a high-performance GPS receiver as its primary source of position data, augmented by either the WAAS satellite system, or the radiobeacon differential (DGPS) system if the 957 is connected to the optional Northstar 2701 receiver.

To see if the 957 is using WAAS or DGPS, press the

CHART

key to display the

GPS POSITION

screen and look for the

WAAS

or

DGPS

indicator below and to the right of the lat/lon display.



To see more information about DGPS, on the

GPS POSITION screen, press the

DGPS INFO

key to display the

DGPS STATUS screen. Check for low noise levels and mid-range SNR readings.

To display more information about signals received from the satellites, press the

SAT INFO

menu key.

GPS satellite number


36

WAAS satellite number

Figure 14: Satellites on the GPS satellites screen

The satellite map on the

GPS SATELLITES

screen shows the current location of the satellites in the sky. The 957 displays

GPS satellites as circles; WAAS satellites as hexagons. You can check the quality of their signals by looking at each satellite’s

Signal-to-Noise Ratio (SNR). The higher the ratio, the better the quality.

While the U.S. government identifies WAAS satellites by their pseudo random number (PRN)—a three-digit number ranging from 120 to 138—the 957 identifies them by two-digit numbers ranging from 33 to 51. For example, the satellite for the Atlantic

Operating Region (AOR) is PRN 122, which the 957 displays as

35. See Table 4 below for the satellite identification numbers

that may be displayed on the 957’s screen.

Table 4: Satellite identification numbers

PRN

120 121 122 123 124 125 126 127 128 129

33 34 35 36 37 38 39 40 41 42

ON GPS

SATS

SCREEN

PRN

ON GPS

SATS

SCREEN

130

43

131

44

132

45

133

46

134

47

135

48

136

49

137

50

138

51

Page 35


Selecting differential options

About auto-dimming mode

Using the remote control

Turning off the 957

The 957 has several settings for differential reception. To select one, press the

STAR

key to display the

OPTIONS/SERVICE INFO screen, then press the

RECEIVER OPTIONS

key to display the

RECEIVER OPTIONS

screen. The

DIFFERENTIAL OPERATIONS field offers the following options (depending on the equipment that’s connected to the 957):

•

DISABLED

- to turn off all differential corrections

•

RADIO BEACON

- to force radiobeacon differential

if

the

957 is connected to a radiobeacon source (for example, the optional 2701)

•

WAAS

- to force WAAS differential corrections

if

the 957 is connected to a WAAS-capable unit (for example, the 2201 or optional 2701)

•

AUTO

- (the default setting) to prefer WAAS differential corrections, but

if

the 957 is connected to the optional

2701, the 957 will automatically switch to radiobeacon corrections

if and when

WAAS becomes unavailable or is less accurate than radiobeacon

When the display screen is at full brightness, if the 957 gets too hot inside due to the outside temperature and sunlight, the display screen will automatically dim. Auto-dimming helps maintain the integrity of the display and reduce power consumption when the 957 is on and running too hot for its current environment. You can override the auto-dim function at any time by increasing the brightness with the

BRIGHTNESS

key. The 957 may dim again as required so as not to exceed the maximum internal temperature.

If you point the remote directly at the 957 and are within nine feet, you can operate all of the 957’s keys except the

PWR

key.

To turn off the 957, press and hold the

PWR

key for a few seconds until the screen goes dark.



Installation-test checklist

To check-out the 957 system after installation:

1.

Turn on the 957, then check for the presence of GPS,

WAAS, or DGPS signals.

2.

Review the functions: With a chart cartridge inserted

,

check that the

CHART

screen is displayed.

3.

Confirm that the

DIFFERENTIAL OPERATIONS

option is at the desired setting

.

If not, press the

STAR

key to display the


RECEIVER OPTIONS

menu key to display the

RECEIVER

OPTIONS

screen. Press the

EDIT

key, change it to the desired setting, then press the

ENTER

key.

For more in-depth information about troubleshooting the 957

installation, see ”SECTION SEVEN: Troubleshooting and servicing the 957 system” starting on page 55.




SECTION SIX:

Interfacing the

957 system

Wiring the connector pins

The 957 has the following interface ports:

•

NMEA 1 and 2 input and output (on the 18-pin NMEA connector)

•

7-pin GPS connector

•

RS-232 input and output (on the 18-pin NMEA connector)

•

RS-422 / NMEA input and output (on the 6-pin AUX connector)

•

Composite video input (on the VIDEO connector)

•

VGA output (on the VGA connector)

You can display the list of wires for the connectors: Press the

STAR

key to display the


PORT SETUP OPTIONS


PORT SETUP OPTIONS

screen, then press the

WIRING INFO

menu key.


SECTION SIX: Interfacing the 957 system

Table 5: NMEA connector pins

Description

NMEA port 1 input A

NMEA port 1 input B

NMEA port 1 input ground

NMEA port 1 output A

NMEA port 1 output B

NMEA port 1 output ground

NMEA port 2 input A

NMEA port 2 input B

NMEA port 2 input ground

NMEA port 2 output A

NMEA port 2 output B

NMEA port 2 output ground

RS-232 ground

RS-232 RX

RS-232 TX

External ground/foil drain

Reserved

Honk out/200 PPNM (pulses per nautical mile)

Wire color

brown blue white yellow orange black tan green white with blue stripe violet gray blue with white stripe white with brown stripe brown with white stripe red white with orange shield orange with white stripe

18

9

13 pink 14

4

12

7

8

6

2

5

15

11

10

17

16

Pin

3

1

Page 40

Figure 15: NMEA connector pin configuration



Table 6: Aux connector pins

Description

Shield/Gnd

Remote On Gnd

Wire color Pin

brown green

1*

1*

Remote On

NMEA AUX In (B)

NMEA AUX Out (B) white black orange

2

3

4

NMEA AUX Out (A)

NMEA AUX In (A) violet blue

5

6

* Pin 1 on the AUX port requires two connections from the cable.

The red wire is not connected on the 957 end, and should be insulated and capped.

For the aux port pin configuration, see Figure 17 on page 51.

Configuring the

NMEA output ports

You can set each output port to meet the requirements of devices that conform to the NMEA 0183 or other data-format specifications:

1.

Press the

STAR

key until you see the

OPTIONS/SERVICE

INFO screen, then press the



PORT SETUP OPTIONS

screen.

2.

Press the

PORT 1 SETUP

or

PORT 2 SETUP

menu key to display a list of seven data-format control options, as shown below.



Choosing the output format

The devices you’re interfacing with the 957 may have special requirements, so check their installation instructions. The

Northstar factory settings are fine for most peripheral devices, but the following options, as described below, are available if needed.

Table 7: Setup options for the NMEA port

Setting

OUTPUT FORMAT

(see below)

NMEA 0183 TALKER ID

(see page 44)

NMEA 0183 LL PRECISION

(see page 44)

OUTPUT RATE

(see page 45)

NMEA 0183 WAYPT ID AS

(see page 45)

NMEA 0183 CHECKSUMS

(see page 46)

OUTPUT DATUM

(see page 46)

Choices

choose 0183 V2.1, 0180,

NONE, 0183 RAY, or DATAM

CDX choose GP, LC, or

II

, to make the 957 look like a GPS receiver,

Loran-C receiver, or an

“integrated instrument” choose hundredths of minutes, thousandths of minutes, or ten-thousandths of minutes choose 2 to 999 seconds for the interval at which data is sent to the external device choose NAME or NUMBER for the identifier of waypoints sent to the external device choose ON or OFF for compatibility with some older devices choose from a list of datums to apply to your lat/lon coordinates, if necessary

The 957 outputs navigation data in any of several standard formats as required by the receiving, or “listener,” device. The

OUTPUT FORMAT

option provides the following choices:

•

NMEA 0183 Version 2.1

is a general-use interface output format used by most autopilots, radars, plotters, and other equipment. (NMEA 0183 Version 1.5 sentences—BWC, GLL, and RNN—allow backwards compatibility with marine equipment designed for this earlier version of 0183).

•

NMEA 0180

is an infrequently used format, developed in the late 1970’s, required by certain older autopilots.

•

None

turns the outputs off for when the 957 isn’t connected to an external device.

•

0183 Ray

is used when transmitting/receiving position information to or from Raytheon equipment. In Raytheon’s



NMEA 0183 format, the checksum isn’t used. (Note: Since the checksum isn’t used, the 957 may receive incorrect

NMEA data when connected to an external Raytheon loran.)

•

Datamarine CDX

is required by Datamarine’s cross-track-error indicators, the latest of which display distance and bearing to the waypoint.

Displaying NMEA output sentences

When you select

0183

or 0183

RAY

as the output format (after pressing the

EDIT

menu key) and press

ENTER

, a screen is displayed showing all the NMEA 0183 sentences the 957 can output.


Three-letter abbreviations identify each sentence and are listed alphabetically. (For the meaning of these sentences, see the

NMEA interface specifications document published by the

NMEA.) The sentences to be output are followed by the word

ON;

those that won’t be output have two dashes indicating that they’re off. Some devices can’t handle all these sentences correctly, so you can customize the output here by turning individual sentences on or off. In general, you may want to turn on only those sentences used by the particular equipment interfaced to the 957.

Turning NMEA output sentences on and off

To turn on or off the 957’s NMEA 0183 sentences, first follow the above description to display the

0183 SENTENCE

screen, then follow these steps:

1.

Press the

CURSOR PAD

to highlight the sentence you want to turn on or off, then press the

EDIT

menu key.

2.

Press the

CURSOR PAD

to toggle the sentence on or off, and press

ENTER

to make your selection (or

CLEAR

to leave it unchanged).

Page 43


3.

Repeat for each sentence as desired. When you’re done, press the

RETURN

menu key to go back to the

PORT

SETUP

screen.

Choosing the talker ID

Choosing the lat/lon precision

NOTE:

The NMEA ON/OFF item list controls only the

Version 2.01 GLL and BWC items, not the 1.5

version of these items. Thus, ON/OFF changes made to the Version 1.5 GLL and BWC output items have no effect on the data actually output unless you select that particular format version.

If you want to set all the sentences to the factory settings for recommended output, press the

SAFE RESET

menu key.

If you want to turn on only a select few sentences for output, press the

ALL OFF

menu key to turn off all sentences, then turn the desired ones back on.

The NMEA 0183 standard requires that the equipment you’re interfaced to—the “listener”—knows what type of device is transmitting the data. The 957’s talker ID tells the listener that it is receiving information from a navigation source, not a communications or sensor device—which transmits completely different forms of data. Certain listening devices will only accept navigation data identified as coming from loran (LC),

GPS (GP), or an integrated instrument (II). The 957 lets you set its talker ID to LC, GP, or II to match what the listener device is expecting:

1.

Check the listener device’s instruction manual to determine which “talker ID” codes it will respond to.

2.

At the

PORT 1 SETUP

or

PORT 2 SETUP

screen, press the

CURSOR PAD

to highlight the

NMEA 0183 TALKER ID option, then press the

EDIT

menu key.

3.

Scroll through the three choices using the

CURSOR PAD

to make your selection, and press the

ENTER

key. The interfaced equipment will now receive the 0183 data in the correct nav-source format.

For more flexibility when communicating with a variety of other devices, you can set the precision level of the 0183 position information output by the 957. The choice you make depends on the equipment to which you’re outputting the

NMEA data (for the number of digits of precision required for that particular device, see the manufacturer’s instructions). You have three choices:



•

XX.XX ’

(lat/lon precision to two decimal places/ hundredths of minutes/or 60 feet)

•

XX.XXX ’

(lat/lon precision to three decimal places/ thousandths of minutes/or 6 feet; this is the factory setting)

•

XX.XXXX ’

(lat/lon precision to four decimal places/ ten-thousands of minutes/or roughly ½ foot)

The 957 conforms to the NMEA version 2.00 standard, and is also compatible with version 1.50. Electronic and pen plotting devices typically benefit the most from three and four decimal places of precision. However, many older devices (and some current autopilots) designed to operate with the original 0183 and other formats can only function with two-place precision.

NOTE:

Position information can be output and displayed to four decimal places, but the ability to actually navigate with such accuracy is limited by the accuracy of the Loran and GPS systems.

Therefore, choosing more decimal places doesn’t necessarily increase navigating accuracy.

Choosing the output rate

Choosing the waypoint identification (ID)

The default rate for standard NMEA 0183 output is two seconds. The 957 lets you use a one-second update interval, a rate of 1 Hz, under limited circumstances, for NMEA and diagnostic data output. Using the 1-Hz output option requires some thought when specifying either NMEA 0183 (NMEA version 2.0) or Raytheon (RAY 0183). Because there isn’t enough time to transmit all available sentences within one second, you must select for output only those that are needed.

If you select more sentences than can be output in one second, the 957 displays the following error message:

SORRY, CAN’T DO THAT. TOO MANY SENTENCES FOR 1 SEC

INTERVAL

In this case, you must select fewer sentences.

There are some applications that need a longer update period.

In that case, you can increase the span to 999 seconds.

Many marine devices can display waypoint names if they’re output by the 957. At the

PORT 1 SETUP

or

PORT 2 SETUP screen, highlight the

NMEA 0183 WAYPT ID AS

option, then press the

EDIT

menu key. Change the option from

NUMBER

to

NAME

, and press the

ENTER

key when done. If capable, the listening device will now display six-character waypoint names.



NOTE:

Be sure to see if the listening device can do this before you change the

NMEA WAYPT ID AS

option. Many older devices won’t understand this identifier, and using it may cause problems with displaying waypoint information or when following routes.

There is no standard for identifying how numbers should be assigned when converting waypoints from names to numbers. When you export waypoint information as numbers to a peripheral device, be aware that numbers aren’t sequentially defined and may be re-used on a random basis.

Choosing the checksum setting

Selecting an independent

NMEA output-port datum

Some older devices may not accept sentences containing the

NMEA 0183 checksum that’s output by the 957. In such cases, the device may not work properly or at all. If you have problems interfacing to older equipment, the 957 offers the flexibility to turn off the NMEA 0183 checksum:

1.

At the

PORT 1 SETUP

or

PORT 2 SETUP

screen, press the

CURSOR PAD

to highlight the

NMEA 0183 CHECKSUMS option, then press the

EDIT

menu key.

2.

Press the

CURSOR PAD

to change the setting from

ON

to

OFF,

and press the

ENTER

key when done.

You can adjust the geodetic datum for NMEA 0183 ports 1 and

2, separately from the datum you choose for position display. At the

PORT SETUP 1 or

PORT SETUP 2 screen, highlight the

OUTPUT DATUM option, then press the

EDIT

menu key. Scroll through the choices to make your selection. To apply this chosen datum to the lat/lon coordinates in the NMEA 0183 output sentences, press the

ENTER

key.

Using 200 ppnm output

The 957 provides an open-collector transistor output (on pin

14) that’s programmed to produce 200 pulses per nautical mile.

The emitter of the NPN transistor is connected to ground, and

its collector connects to the output pin (see Figure 16: ”Wiring for 200 PPNM output,” below). The output can sink 100mA,

and can withstand a maximum positive voltage of 50 volts.If the output connects to an inductive device (for example, a


SECTION SIX: Interfacing the 957 system relay), a spike suppression diode such as a 1N4001 should be connected across the load. Cathode connects to the power side of the device and anode connects to the output pin side. The output is normally open, switching to ground for 80ms. It supports speeds from zero to 100 knots (clamps at 100kt).

Figure 16: Wiring for 200 PPNM output

Configuring the

RS-232 port

Using SC-104 in

Using copy port 1 and copy port 2

The RS-232 port on the NMEA connector is used to interface to any of the following equipment:

•

any compatible SC104 output

•

a PC for downloading your waypoints, or for uploading

957 software updates

The following sections describe the RS-232 port’s settings for

SC-104 in, and copy port 1 and 2.

THE SC-104 IN

setting lets the 957 accept optional differential corrections from any source that transmits the standard SC-104 data stream. When using

SC-104 IN

, be sure that the

BAUD

RATE

setting also matches the beacon receiver’s baud rate requirements.

The

COPY PORT

setting lets you interface the 957 to many PC’s without using an RS422-to-RS232 converter. Many PC application programs can be used for waypoint/route loading, chart programs, data logging, etc. This function “copies” the output of the specified port 1 or port 2 data format (NMEA



0180, NMEA 0183, Datamarine CDX, or Raytheon 0183) to the

RS-232 port’s output for direct connection to the computer.

1.

Press the

STAR

key to display the

OPTIONS/SERVICE

INFO screen, then press the


menu key.

2.

At the

PORT SETUP OPTIONS

screen, press the

PORT 1

SETUP

or

PORT 2 SETUP

menu key to confirm that the port you want to copy is now set to output the desired data format. If necessary, make changes now by pressing the

EDIT

menu key, pressing

ENTER

when done, and the

RETURN

menu key to go back to the

PORT SETUP

OPTIONS

screen.

3.

At the

PORT SETUP OPTIONS

screen, if necessary, change the

RS-232 SETUP

option to display the appropriate

COPY PORT 1

or

COPY PORT 2

selection by pressing the

EDIT

menu key, then pressing the

CURSOR PAD

to change the selection, then pressing the

ENTER

key. The unit will now copy and output the specified port’s data format through the RS-232 port to an external device.

NOTE:

The RS-232 diagnostic port may overflow—when it’s configured to either

COPY PORT1

or

COPY

PORT2

, and one of the copied ports is in 0183 output mode—unless the diagnostic port’s baud rate is fast enough to handle the number of characters. Because the diagnostic port’s baud rate can now be changed, the 957 will always display this precautionary message before you actually reset the baud rate:

WARNING: ALL

SENTENCES MAY NOT TRANSMIT AT DIAG

BAUD RATE. PRESS “ENTER” TO CONTINUE

Using the port off setting

About the diagnostic setting

Use this setting when you don’t need the RS-232 port’s input or output functions.

This setting is only used for troubleshooting at the Northstar factory. Do not use this setting.



Connecting the

957 to a remote display

The 957’s VGA connector is used to connect the 957 with a remote display, such as the Northstar 1201. Northstar doesn’t supply the connecting cable for non-Northstar displays because the cable requirements vary with each particular installation.

The 957’s VGA connector accepts the 15-pin connector from a standard VGA cable. Check the manufacturer’s instructions for further details on the cabling and the setup. If you’re connecting to the Northstar 1201, see the

Northstar 1200 Series

Display Owner’s Guide (part number GM1200UG).

Connecting the

957 to a video camera

The 957’s VIDEO connector is used to connect any

NTSC-compatible device, such as a video camera, to the 957.

Northstar doesn’t supply the connecting cable because the cable requirements vary with each particular installation.

Check the manufacturer’s instructions for details.

After you’ve connected the 957 to the video device, check the connection by pressing the

VIDEO

menu key (available on most

957’s screens) to see the video image on the screen. For instructions on moving the image and changing its size, see the

Northstar 957 Operator’s Manual (part number GM957UG)

.

Connecting with a radar device

The 957 can be set to interface with a radar device. The 957 supports the NMEA TLL sentence, sometimes referred to as the

“rattle” sentence. This sentence lets the 957 communicate its position to an interfaced radar device, which tracks a user-defined target. In turn, the interfaced radar device communicates to the 957 the target’s position—in lat/lon coordinates—so that you can see the target symbol, displayed as a waypoint, right on the

CHART

screen (after you save the position). The target symbol is displayed with the name

-RADAR

on the

CHART

screen, as well as on both the

ALPHA and

LOCAL

waypoints lists. There, the radar waypoint is displayed with the hours/minutes/seconds/day/month/year (for example,

12:50:20-30JUN02

) in the description field.



Connecting two

Northstar units

Assembling the cable

Terminating the cable

You can connect two 957’s and then transfer one of the unit’s waypoints and routes into the other. To connect the 957’s, you must fabricate an interface cable and terminate both its ends with the supplied 6-pin solder-cup style cable connectors. This data-transfer cable is not included with the 957. You must select a cable; use only shielded, twisted pair.

You can also connect a 957 with a Northstar 952, 951, or 941, also using your own data-transfer cable. Each 952, 951, and 941 that you want to transfer waypoints and routes to or from

must

be using software version 3.12 or higher.

To assemble the cable

:

1. Cut the cable to the desired length.

2. Slide the following parts onto each end of the cable, in the following order:

•

connector backshell

•

rubber-strain relief boot that fits inside the backshell

•

twist lock (also known as a quarter turn), ensuring that it’s facing in the correct direction.

3. Trim and prepare the wires for soldering to the connector body.

4. Terminate the cable, as described below.

To terminate the cable:

1. Terminate and solder the appropriate wires to the appropriate pins:

•

For wiring two 957’s, see Figure 17 on page 51 and

Table 8 on page 51.

•

For wiring a 957 to a 952/951/941, see Figure 18 on

page 52 and Table 9 on page 53.

2.

Move to Step #3 on page 53.



Shield termination

957 6-PIN AUX CONNECTOR

Ground/shield

Pin number

1

No connect

2

Aux input B

Aux output A

3

4

Aux output B

Aux input A

5

6

957 6-PIN AUX CONNECTOR

Pin number

1

Ground/shield

2

No connect

3

4

Aux input B

Aux output A

5

Aux output B

6

Aux input A

Figure 17: 957 aux ports’ interface diagram (wiring side view, solder cup)

Table 8: 957 to 957 wiring

3

4

5

6

1

2

957

Pin #

Function

Ground shield

No connect

Aux In B

Aux Out A

Aux Out B

Aux In A

5

6

3

4

1

2

957

Pin #

Function

Ground shield

No connect

Aux Out B

Aux In A

Aux In B

Aux Out A



No connect

No connect

No connect

No connect

Aux input B

Ground/shield

Aux output B

Aux input A

952/951/941 10-PIN

AUX CONNECTOR

Pin number

1

2

3

4

5

6

7

8

Shield termination

Aux output A

No connect

9

10

957 6-PIN

AUX CONNECTOR

Pin number

1

2

3

4

Ground/shield

No connect

Aux input B

Aux output A

5

Aux output B

6

Aux input A

Figure 18: 952/951/941 and 957 aux ports’ interface diagram (wiring side view, solder cup)



Table 9: 952/951/941 to 957 wiring

952

951

941

Pin #

5

Function 957

Pin #

Function

6

7

8

Aux In B

Ground shield

5

1

Aux Out B

Ground shield

Aux Out B

Aux In A

3

4

Aux In B

Aux Out A

9 Aux Out A 6 Aux In A

*Pins 1, 2, 3, 4 and 10 on the 941/951/952 aux connector, and pin 2 on the 957 aux connector, aren’t used.

3. Slide the twist lock onto the connector body.

4. Screw the connector backshell to the connector body, and tighten.

5. Install the strain- relief clamp with two screws.

6. Connect each end of the cable into the 6-pin ports at the back of the 957, or connect one end of the cable into the

10-pin port at the back of the 941, 951, or 952.

7. Turn both units on, and test for the proper cable connection: a) Press the

WAYPTS/ROUTES

key; b) Press the

IMPORT/EXPORT

menu key; c) Press the

IMPORT DATA

or

EXPORT DATA

menu key; d) Press the

TEST COMM

menu key.

8. The message should read

REMOTE LINK OK

. If so, the hardware connection is now complete and the two units can now transfer all waypoints and routes between them.

Setting the anchor-watch alarm honk

The anchor-watch alarm function is used to set the 957 to honk, in addition to beep, once you’ve connected a honker to

pin #14 on the 957’s NMEA connector. See Figure 19 below for


SECTION SIX: Interfacing the 957 system the wiring to support the 957’s external honk feature. You can use Radio Shack part number 273-060 or an equivalent.

Figure 19: Pin 14 honk alarm connection

A continuous honking sequence will begin, either when the vessel moves outside the specified anchor-alarm radius or when the navigation source becomes unavailable—once you’ve set the anchor-watch alarm to honk. For detailed instructions about this feature, see the

Northstar 957 Operator’s Manual

(part number GM957UG).


SECTION SEVEN:

Troubleshooting and servicing the

957 system

Troubleshooting

957 installation problems

Typical problems that may occur during or after the 957’s installation are described in the tables below.

Table 10: Troubleshooting the 957 installation

Problem Area Symptom Possible Solutions/Reasons

POWER

•

Pressing the

PWR

key doesn’t start the

957

•

Check the fuse and the power to the

957.

DISPLAY

•

The 957 powers up, beeps, but there isn’t any video.

•

The display may have failed. Call your

Northstar dealer or the Northstar

Service Department.


SECTION SEVEN: Troubleshooting and servicing the 957 system

Problem Area

Table 10: Troubleshooting the 957 installation (continued)

Symptom Possible Solutions/Reasons

DISPLAY (cont.) •

The display screen dims, either slightly or more, after the 957 has been on for a certain time.

•

The 957 may be implementing its auto-dimming mode. Auto-dimming helps maintain the integrity of the display and reduce power consumption when the 957 is on and running too hot for its current environment. In this case the display screen may automatically dim.

•

The message

8117 FAILURE

appears where the video input image should be.

•

The internal 8117 has failed; contact the Northstar Service Department.

(This failure affects only the video image, nothing else.)

SYSTEM

System lock-ups

•

Color bars appear where the video overlay image should be.

•

Check that the video image is turned on (press

STAR

to display the

VIDEO SETUP

screen).

•

Check the cables and the connectors.

•

Check that the video equipment is working properly.

Hardware-related:

•

The system locks up on a random basis with no apparent pattern.

•

Possible internal hardware failure; call the Northstar Service Department.

•

The system locks up when using a chart card.

•

System fails any initial self-tests.

•

Possible bad chart card. Remove the card, and inspect the pin area of the card and the 957 for damage. If the pins in the 957 are bent or damaged, to prevent further damage, don’t insert another card. If you’re sure that the card pins aren’t bent, try inserting a new card (turn power off before inserting the card).

•

Possible internal hardware or software failure; call the Northstar

Service Department.



Table 11: Troubleshooting the 2201 installation

Then . . .

If . . .

Satellite signals are often lost, or the 2201 works while you’re travelling in one direction, but not the opposite one.

The 2201 may be partially shaded by metallic objects around it.

Re-position or raise the 2201 away from the object for a better satellite view.

Signals may be lost when the 2201 is under a bridge or when shielded by buildings.

Poor SNR readings are obtained even after running the 957 for several minutes

Check the quality of the antenna location—the antenna should have a

clear view of the sky. For the correct antenna placement, see Figure 8 on page 19.

Make sure the antenna is clean, and not covered with ice, snow, or exhaust soot.

You’re having difficulty obtaining WAAS satellites

Check that WAAS is available in your operating area.

Reset the 957’s satellite elevation setting to its default (10 degrees).

Check that the 957’s


option is set to either

WAAS

or

AUTO.

The following error message appears on the 957 display:

COMM FAIL

With power on, check the antenna and wiring connections.

Disconnect the 2201 from the 957, then measure the 7-pin 2201 connector for 10 - 36 volts at pin 7, ground at pin 6.

Check the 2201’s remote-on: Pin 5 should measure less than 5 ohms to ground.

After testing above, re-connect the cable and press the

PWR

key to turn the 957 off, then turn it back on again.

TOO FEW SATS

Check if anything is blocking the 2201’s view of the sky.

The almanac may not be complete; allow up to 30 minutes for full initial acquisition.



Table 12: Troubleshooting the 2701 and AN205-P installation

Then . . .

If . . .

Satellite signals are often lost, or the

AN205-P works while you’re travelling in one direction, but not the opposite one.

The antenna may be partially shaded by metallic objects around it.

Re-position or raise the antenna away from the object for a better satellite view.

Signals may be lost when the antenna is under a bridge or when shielded by buildings.

Poor SNR readings are obtained even after running the 957 for several minutes

Check the quality of the antenna location—the antenna should have a clear view of the sky.

Make sure the antenna is clean, and not covered with ice, snow, or exhaust soot.

You’re having difficulty obtaining WAAS satellites

Check that WAAS is available in your operating area.

Reset the 957’s satellite elevation setting to its default (10 degrees).

Check that the 957’s


option is set to either

WAAS

or

AUTO

.

The following error message appears on the 957 display:

COMM FAIL

With power on, check the antenna and wiring connections.

Disconnect the 2701 from the 957, then measure the 25-pin 2701 connector for 10 - 36 volts at pin 25, ground at pin 13.

Check the 2701’s remote-on: Pin 12 should measure less than 5 ohms to ground.

After testing above, re-connect the cable and press the

PWR

key to turn the 957 off, then turn it back on again.

TOO FEW SATS

Check if anything is blocking the 2701’s or antenna’s view of the sky.

The almanac may not be complete; allow up to 30 minutes for full initial acquisition.



Getting technical support

Contacting Northstar

You can email the

Northstar Service

Department right from

Northstar’s website, www.northstarcmc.com.

Here, you also can access additional technical information under either the

Manuals link (you can download manuals in

PDF form) or Support links.

After you’ve followed the instructions in this manual, if you need technical assistance or have any other service-related questions, you can contact the Northstar Service Department.

Please be as complete and accurate as possible when describing the problem so that a service technician can research the problem and provide the quickest response. You can reach

Northstar’s Service Department by email, fax, U.S. mail, or

phone as described in Table 13 below.

NOTE:

Please have the 957’s serial number — available on the back of the unit or on the

OPTIONS/

SERVICE INFO

screen — ready before contacting

Northstar’s Service Department.

Northstar’s Service Department is available between 9:00 AM and 5:00 PM Eastern Time, Monday through Friday, excluding major holidays.

If you want to buy parts, or would like to request brochures or have product questions, contact the Northstar Sales

Department, as described in the table below.

Table 13: Contacting Northstar

Email:

Service: [email protected]

Sales: [email protected]

Fax:

Service: 978/897-1595

Sales: 978/897-7241

Telephone:

Main number: 978/897-6600 or 800/628-4487

U.S. mail:

30 Sudbury Road

Acton, MA 01720 USA



Table 13: Contacting Northstar (continued)

Website:

www.northstarcmc.com (you can send email to

Northstar directly from this site)

Hearing from you

Using the Dealer

Express web pages

Online information sources

Ordering replacement parts

Obtaining software updates

Your feedback is important and helps Northstar ensure that this manual is a valuable resource for all marine technicians. Email your comments or suggestions about this manual to the following address:

[email protected]

Northstar dealers can get service information online by going to the Dealer Express area on Northstar’s website. Contact

Northstar for your dealer password before clicking on the

Dealer Express link. This area includes the following topics:

•

service bulletins (for known issues and solutions)

•

software update information (for new software features)

•

service request form (for sending systems back)

•

service status request form (for systems currently under repair)

•

warranty registration form (for registering new products)

For up-to-date WAAS information, visit the following websites:

•

The status of WAAS implementation:

http://gps.faa.gov/programs/waas/implementation_Status/ implementation_status.htm

•

U.S. government’s WAAS/GPS website:

http://gps.faa.gov

•

Stanford University’s WAAS Research Center:

http://www.stanford.edu/group/GPS/Projects/WAAS/metrics.html

To order spare, replacement, or missing parts, call the Northstar

Sales Department at 978/897-6600 or 800/628-4487.

Periodically, Northstar posts 957 software-update addenda on its website (www.northstarcmc.com) under the

Manuals

link.



For dealers

Once Northstar has posted an addendum to its website, you can call the Northstar Sales Department to order the corresponding software update, or download the update from the Dealer Express area of the website.

For operators

957 end users should contact their respective dealer for software updates. Northstar does not recommend that operators install software updates. If an update is installed incorrectly by mistake, you could lose data and the 957 may not function correctly. Software updates aren’t covered by the

Northstar warranty.

Servicing the 957 system

957 repairs are performed only by authorized Northstar dealers or at the Northstar factory. Service includes a complete hardware and software check-out.

NOTE:

For 957’s that are still under warranty, field repairs are not authorized and will void the warranty! Please contact the

Northstar Customer Service Department if you need clarification, or need assistance with having repairs done.

For a system under warranty, shipping charges to the factory are the only cost for factory repair. The repaired 957 will be returned via prepaid economy ground freight (units returned overseas are chargeable).

The 957 and any accessories returned for warranty repair that are determined to be without fault are subject to a handling charge.



Returning a 957 system for service

Before returning the

957 to the Northstar factory, to prevent delays, it is critical that you first obtain a

Return Materials

Authorization (RMA) number from the

Northstar Service

Department. If the 957 was purchased through a dealer, call the dealer with the 957 serial number so they can help you get an

RMA number. The

957’s serial number is on the label at the back of the unit.

Shipments without a proper RMA number will not be accepted!

CAUTION!

You may want to back-up any user-defined waypoints and routes before returning the 957 for repair. See the Northstar

957 Operator’s Manual for details.

The 957 is covered by a two-year hardware-only warranty, which, in summary, states that if the unit is returned to the factory by the owner or dealer during the warranty period,

Northstar will repair or replace, free of charge, any part found to be defective due to faulty materials or workmanship if the system has been properly installed and hasn’t been abused. See the

Limited Warranty Policy

at the front of this manual for further details. The only cost to the owner will be the one-way shipping charges and any associated charges that may be imposed by the dealer. If you have overnight or second-day shipping requirements, before shipping the unit, please call the factory for turnaround time, freight charges, and payment arrangements.

The 957 should be shipped only in a properly designed carton with packing material, and to the Northstar factory at the following address:

Northstar Technologies

Service Department

30 Sudbury Road

Acton, MA 01720 USA

Maintaining the

957

Basic maintenance

At the end of the day, wipe the 957 off with a damp cloth.

Cover it with the sunshield to protect it from excessive heat.


APPENDIX A:

957 system technical specifications

Table 14: 957 technical specifications

Physical features/environmental Interfacing

Waterproof control head

10.4” diagonal color LCD

Unsurpassed sunlight viewability

640x480 pixel, hi-temp, backlit, transmissive color

LCD

Flush mount standard

High-contrast anti-reflective screen

Waterproof chart cartridge door

Large, easy-to-use backlit controls

Easy interfacing I/O plugs

0 degrees Celsius - 55 degrees Celsius max 95% relative humidity, noncondensing

10 - 36 volts DC power

Two bi-directional NMEA I/O ports, 1 AUX port

Two bi-directional RS-232 ports

Interfaces to optional Northstar 490 for fishfinding

Waypoint upload/download capability to a PC (with appropriate software)

One VGA out port (connects to Northstar 1201 monitor and others)

One VIDEO in port

NMEA input sentences: WPL and others

200 PPNM speed output

Honk output

NMEA output sentences: APB, BOD, BWC, GGA,

GLC, GLL, GSA, GSV, LCD, HSC, MSS, RNN, RMC,

RMA, RMB, VTG, WCV, XTE, ZDA, ZTG. (Conforms to NMEA v 2.0 and later. Supports 1.5 GLL and

BWC.)

Accepts most external loran receivers

Waypoint and route transfer between two 957’s (or a

957 and a Northstar 941/951/952)


APPENDIX A: 957 system technical specifications

Physical features


Interfacing

Self-contained 12-channel L1 GPS/WAAS pod antenna-receiver.

Dimensions: 4.5" (114mm) diameter x 3.79" (96mm) high.

Weight: 1.2 lb. maximum excluding cable (0.55 kg).

Cable (normal installation): 22 Ga conductors foil-shielded cable, environmentally sealed (50-foot cable supplied).

Mounting: 1-14 UNS threads x 1" deep for mast mounting, and 3 x 10-32 UNF screws for deck mounting.

Connector receptacle with 7 male contacts. Mating:

Switchcraft EN3C7FC or equivalent.

Prime power:10 to 36 VDC (12V and 24V system).

2.4 watts typical at 12V. Reverse polarity protected and load dump protected.

Input messages:Auxiliary (RTCM SC104) messages

1, 3, 9. Output messages: NMEA GGA, GSA, GSV,

RMC, VTG, ZDA, GLL.

Serial communications: RS-232 asynchronous data port, Main port IN/OUT plus AUX input; 19,200 baud standard (both ports user-selectable from 300 to

19,200 baud). Default baud rate = 9600.

Performance Environmental

Acceleration: 4 Gs (39.2 m/s

2

), Jerk: 2 m/s

3

Velocity: 1852 km/h (514 m/s) max.

Position accuracy: <3 m 2dRMS.

Time-to-first-fix (TTFF): Hot start - 20 seconds typical, with current almanac. Warm start - 45 seconds typical, with current almanac. Cold start - 2 minutes typical, with no almanac.

Re-acquisition time: <1 second typical to re-acquire

(five-second obscuration). 3 seconds typical to re-acquire (60-minute obscuration).

Channel allocation: 10 GPS channels plus two WAAS satellites.

Coarse acquisition: C/A code (1.023 MHz chip rate), code and carrier phase tracking.

Sensitivity: -135 dBm (antenna input level).

Operating temperature: -30 to +75°C (standard).

Storage temperature: -55 to +90°C.

Humidity: SAE J1455/4.2 Procedure I/II.

Waterproof: Fully sealed unit. Meets MIL-STD 810E method 512.3 (equivalent to 6-foot, 30-minutes submersion).

Shock: MIL-STD 810E Method 506.4, Procedure I,

IV.

Vibration: MIL-STD 810E Method 514.4 Category 8.

Salt spray: MIL-STD 810E Method 509.3 (48 hours).

Sand and dust: MIL-STD 810E Method 510.3.

ESD: IEC 1000-4-2 level 2 (-8 kV to +8 kV).

EMI: FCC Class B, European CE, 89/EEC EN55022 class B, EN50082-1.

Ultraviolet light protection: ASTM G53-88.




Physical features

Dimensions: 2.0” high x 4.68” wide x 8.9” deep

Weight: 2 pounds

Interfacing

Primary power: 10 to 40 VDC (12V and 24V systems). 10 watts typical.

RS-232, GPS, and beacon receiver comm ports

Performance Environmental

Velocity: 1852 km/h (514 m/sec) max.

Acceleration: 4 Gs (39.2 m/sec

2

, Jerk: 2 m/sec

3

Position accuracy: < 1 m circular error probability

(CEP), DGPS; < 2 m circular error probability (CEP),

WAAS.

Time-to-first-fix (TTFF): Hot start - 20 seconds typical, with current almanac, position, time, and ephemeris.

Warm start - 45 seconds typical, with current almanac, position, time, and ephemeris. Cold start - 2 minutes typical, no almanac, position, and time. With

WAAS acquisition, add 30 seconds typical (max. 1 minute)

Re-acquisition time: < 1 second typical to re-acquire

(5-second obscuration); 3 seconds typical to re-acquire (60-minute obscuration).

Channels allocation: 10 GPS channels plus two

WAAS satellites.

Operating temperature -

Receiver: 0 degrees C to +50 degrees C.

Antenna/preamp: - 40 degrees C to +50 degrees C.




North Star GM9571M Installation manual

AAS

HART

AVIGATOR

I

NSTALLATION

M

ANUAL

Revision C1

Part Number GM957IM

Northstar Technologies

30 Sudbury Road

Acton, Massachusetts 01720

800/628-4487

978/897-6600 www.northstarcmc.com

Limited warranty policy

Contents

SECTION ONE: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SECTION TWO: Installing and wiring the 957 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SECTION THREE: Installing and wiring the 2201 . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

SECTION FOUR: Installing and wiring the 2701 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

SECTION FIVE: Checking out the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

SECTION SIX: Interfacing the 957 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

SECTION SEVEN: Troubleshooting and servicing the 957 system. . . . . . . . . . . 55

APPENDIX A: 957 system technical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . 63

SECTION ONE:

Introduction

Welcome to the

Northstar 957

Who should read this manual

Northstar 957 Installation Manual

Scope of this manual

Northstar 490 Installation Manual

Major installation steps

Northstar 957 Installation Manual

Northstar 957 Flush-Mounting Template

Northstar 957 Operator’s Manual

SECTION TWO:

Installing and wiring the 957

Safety considerations

Bench-testing the

957

Mounting the 957

Choosing the best location

Figure 1: Mounting recommendations

Flush-mounting the 957

Northstar 957 Flush-Mounting Template

Figure 2: 957 flush-mount clearance dimensions

Yoke-mounting the 957

Figure 3: 957 yoke-mount dimensions (side)

Figure 4: 957 yoke-mount dimensions (front)

Wiring the 957

Avoiding cable wiring shortcuts

DON’T DO THIS!

Do not make sharp bends in the cables

Do not run cables in such a way that might allow water to flow down into the connectors

DO THIS!

Do make drip and service loops

Do tie-wrap all cables to keep them secure

If cables are shortened, lengthened, or re-terminated, do seal and protect all wiring connections

Do leave room at the back to service the 957

Figure 5: Avoiding cable wiring shortcuts

Understanding the interface connectors

Figure 6: Interface connectors (back of 957)

Table 1: Interface connector functions

Table 1: Interface connector functions (continued)

Electrical power requirements

Power source

Connecting the 957 to ship’s power

SECTION THREE:

Installing and wiring the 2201

Introducing the

2201

Installing the

2201

2201 parts list

2201 GPS/WAAS pod

50-foot 957POD-CA cable (with two finished connectors)

Choosing the best mounting location

3 mounting screws and 3 washers