Make sure the power is present and correctly wired. North Star 10 kW, 25 kW

ƒ

ƒ

ƒ

ƒ

ƒ the affected piece of equipment and/or the antenna is not located within the radar beam.

(See the section "Install the radar" for information about the optimum installation height and the radar beam width) the cables supplied with the equipment have been installed correctly. In particular, check for loose connections and loose or missing shield meshwork at the cable ends the covers of the scanner and radar processor box are securely screwed and/or fastened in place, so that the internal shielding is effective each piece of radio equipment is grounded to the closest ground location, and that other devices are grounded to the closest ground location on the hull the radar cabling has not been bundled with the VHF radio cabling and/or with the direction finder cabling. The radar cabling must always be separate.

16.5 Make sure the power is present and correctly wired

Check the in-line fuse.

Re-verify that the correct system voltage is being used for the radar processor box model and that the power is properly wired. If the radar processor has incorrect power, the system may not initialize properly or the radar processor may be damaged.

16.6 Confirm the equipment installed

1. Confirm the type of navigator used with the radar (6000i, etc).

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Serial number:___________________

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Software version:_________________

2. Confirm that the NMEA Port 2 interface option is set to RADAR.

3. Confirm the type of radar installed:

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2 kW dome

ƒ

ƒ

4 kW dome

6 kW open array

ƒ

ƒ

10 kW open array

25 kW open array

4. Make sure the voltage input and radar processor are correct for the system being installed, as follows:

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ƒ

ƒ

ƒ

ƒ

2 kW - 12 V DC - Radar Processor NS004780

4 kW - 12 V DC or 24 V DC - Radar Processor NS004781

6 kW - 12 V DC or 24 V DC - Radar Processor NS004782

10 kW - 24 V DC - Radar Processor NS004783

25 kW - 24 V DC - Radar Processor NS004784.

16.7 Are Range Rings displayed?

Yes, range rings are displayed.

1. Confirm that the installation set up had been performed.

2. Verify that the array is turning. If it's a dome, with the power off, remove the dome cover

(weather permitting). Apply power to the system. After the warn-up countdown has completed, and the transmit option is set to ON, verify that the array is turning.

48 Northstar 25 kW Radar Installation Manual

3. If the antenna does not turn, skip to the section "If the scanner fails to turn".

No, range rings or range scale information are not displayed.

1. Verify that the serial data cable wiring is correct for the communications cable as shown in the section "Connect the communications cable to the junction box".

Northstar 25 kW Radar Installation Manual 49

17 Manual tuning procedure for the 6000i or 6100i system

NOTE: The following manual tuning procedure is provided only for possible situations where the unit's automatic tuning does not perform well with a Northstar 6000i or 6100i system. At present,

Northstar is not aware of any such situation and recommends that automatic tuning be used, unless a reason is found to use this manual procedure.

Begin by restoring all radar settings to their factory settings (except trigger delay, heading calibration and whether or not a heading sensor is installed), as follows:

1. From the main radar page, press Page 1.

2. Press Restore... .

3. Press Restore factory settings to return the unit to its state when it was shipped

(with the exception of trigger delay, heading calibration and whether or not a heading sensor is installed).

4. Press Return and Done to return to the main radar screen.

Next, set the rain clutter and sea clutter to 0 and the gain to 150 as follows:

1. From the main radar page, press Page 2.

2. If necessary, press Mode to make it read Manual.

3. Press Rain Clutter to activate the control.

4. If necessary, press Rain Clutter again to make it read Manual.

5. Press 0 twice on the keypad to set the rain clutter value to zero.

6. Press Sea Clutter.

7. Press 0 twice on the keypad to set the sea clutter value to zero.

8. Press Gain to activate the control.

9. If necessary, press Gain again to make it read Manual.

10. Press 1, 5, and 0 on the keypad to set the gain to 150.

11. Press Return and Done to return to the main radar screen.

Next, set the scale to 1/8 nautical miles as follows:

1. Press zoom IN several times to access the 1/8 nautical miles scale. (The current scale is shown in the upper left corner of the screen, identified as "RNG").

2. From the main radar page, press Page 2, Page 3, Page 4, and Install... .

3. Press Tune... to display the tuning screen.

4. Press Tune Mode (repeatedly if necessary) to set it to Manual.

5. Set the rough tune value to 128 (if necessary) by selecting Tune Preset and typing 128 on the keypad.

6. Press Tune.

7. Adjust the tune preset value upwards by pressing the up arrow key on the cursor pad until the quantity and strength of visible targets is maximized.

8. If the quantity and strength of targets does not increase, return to 128 by typing 128. Then adjust the tune preset value upwards by pressing the down arrow key on the cursor pad until the quantity and strength of visible targets is maximized.

50 Northstar 25 kW Radar Installation Manual

18 25 kW radar system specifications

NS-RDR1257MO

Scanner type

25 kW scanner

Open array

Radar system

DC input 21.6 V to 31.2 V (DC 24 V systems ONLY)

Scanner dimensions

Scanner weight

7.45 ft [2270 mm] (swing circle) by 1.2 ft (H) [356(H) mm]

119 lb (54 kg) ± 10%

Vibration Amplitude 2 x 13.2 Hz, ± 0.03" [1 mm] ± 10%

Amplitude 13.2 Hz to 100 Hz, gravity acceleration 0.7 m/sec²

Waterproof IPX6

Plane of polarization Horizontal

Preheating time Minimum 3 minutes

Power consumption

Emission type

Peak power output

180 W (maximum) at maximum wind velocity

P0N. Passed JRC FCC/IC/R&TTE Type Certification:

FCC ID: CKENKE2252

IC ID: 768C-NKE2252

R&TTE: QQ-RTTE-05/04-02

25 kW ± 50% under any pulse condition

Transmitter frequency 9410 ±30 MHz

Transmitter tube Magnetron NJR Model M1568B(J)

Horizontal beam width 1º ± 10% (-3 dB width)

Vertical beam width

Side lobe level

Rotation rate

20º ± 20% (-3 dB width)

Below -26 dB maximum (within ± 10º)

Below -30 dB maximum (outside ± 10º)

Approximately 24 rpm (minimum 20 rpm at 70 knot wind maximum)

Pulse length/PRF

Duplexer

Mixer

IF amplifier

IF bandwidth

IF characteristic

IF output

0.07μs ± 30% 2250 Hz ± 5%

0.20μs ± 25% 2250 Hz ± 5%

0.40μs ± 25% 1400 Hz ± 5%

0.80μs ± 25% 750 Hz ± 5%

1.0μs ±25% 650Hz ±5%

1.2μs ±25% 510Hz ±5%

Circulator H-6AJRD0001 FCS-68 and diode limiter

Model NJRC NJS6930

MIC front-end Model Toshiba S-RX24

Center frequency 60 MHz ±3 MHz

2 0 MHz ± 3 MHz (0.07μs)

6 MHz ± 2 MHz (0.25μs, 0.40μs)

3 MHz ± 1 MHz (0.8μs, 1.0μs, 1.2μs)

Log

- 2 V for 100 dB typical

Bandwidth controlled by serial port

Com port

Gain

Noise figure

Temperature range

RS485 9600bps Half Duplex

Defined in NKE-2252 Digital COM specification-

Minimum 90 dB

Toshiba S-RX24 @ 6 dB (average) at front-end input

-25ºC to +55ºC -25ºF to 131ºF (–15ºC to +55ºC)

Relative humidity 93% at 104ºF (+40ºC)

Relative wind velocity 51.5 m/sec (100 knots)

Sector blank Up to 3

25 kW Radar processor specifications

NS-RDR1257MO

Northstar 25 kW Radar Installation Manual 51

Processor model

Processor dimensions

NS004784

Width 5.6" (142 mm)

Height 2.2" (56 mm)

Length 7.9" (200 mm)

Processer weight 1.9 lbs (870 g)

Vibration EN60945

Temperature range

Relative humidity

Power up time

DC input

Power consumption

+5ºF to +131ºF (–15ºC to +55ºC)

95% at 104ºF (+40ºC)

Approximately 35 seconds

10.8 V to 36 V (DC 12/24 V system)

3 W (when operating)

Leakage current <200 μA (when off, with a remote power input)

52 Northstar 25 kW Radar Installation Manual

25 kW Installation back Cover ADD ARTWORK