J-F2,000X-DK Navman Wireless, J-F2,000X-DK Datasheet - Page 11

• Manufacturer Part Number: J-F2,000X-DK
• Description: EVAL KIT GPS JUPITER 2
• Manufacturer: Navman Wireless
• Series: -r
• Type: Receiver, GPSr

Specifications of J-F2,000X-DK

• Frequency: 1575.42MHz
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Jupiter 2
• Other names: 943-1013

J-F2
5.0 Electrical requirements
5.1 Power supply
5.1.1 VDD 18 – Main 1.8V always ON power input. Refer to the Designer’s Notes for more details.
Noise and ripple requirements are:
Note: protected by POR, which will force the GPS receiver into Hibernate mode, if triggered. It will require an ON
pulse to wake it up again.
Sufficient low ESR capacitance is required and the 1.8V supply must have low source impedance to prevent the 1.8V
rail POR to trigger when the module is started up via the ON-OFF line. This causes inrush current that can cause the
1.8V supply to drop.
Refer to the Designer’s Notes for information on designing a suitable system.
5.1.2 External antenna voltage
The J-F2 requires an external antenna Bias-T to provide the voltage to the antenna. This is detailed in the
Designer’s Notes.
5.1.3 RF (Radio Frequency) input
RF input is 1575.42 MHz (L1 Band) at a level between –135 dBm and –165 dBm into a 50 Ohm impedance.
5.1.4 Antenna gain
The receiver will operate with a passive antenna with Isotropic gain down to a minimum of -6dBi. Active antenna are
supported. The internal LNA must be switched to low gain mode if an active antenna is used.
An active antenna of 20dB minimum (exiting the cable) will offer the best performance. 30dB exiting the antenna
cable is maximum useable active antenna gain.
Refer to section 2.11 for more details.
Contact NAVMAN for in depth passive antenna design support.
5.1.5 Burnout protection
The receiver accepts without risk of damage a signal of +10 dBm from 0 to 2 GHz carrier frequency, except in band
1560 to 1590 MHz where the maximum level is –10 dBm.
5.1.6 Jamming performance
Eight separate in band jammers can be detected and digitally removed in the GPS DSP. This is over and above the
excellent SAW filter response that exists before the GPS LNA input.
Note: The spectral purity of oscillators and RF transmitters in the host system will determine if harmonics are formed
that are equal to the frequencies above.
Compact wireless product design requires close monitoring of jamming issues.
Contact Navman for assistance especially if designing with a passive GPS antenna.
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Datasheet
Supply voltage: Nominal 1.8V, +50mV, -50mV.
0-3MHz range, less than 50mV peak to peak noise.
>3MHz range, less than 15mV peak to peak noise.
Navman Wireless OEM Solutions • 27422 Portola Parkway-Suite 320; Foothill Ranch, CA 92610
TEL: +[phone] • FAX: +[phone] • www.navmanwirelessoem.com
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