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NLC-SKII |
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| datasheet |
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NAELCOM has produced a new GPS receiver board, the “NLC-SKII”,
which is based on the Copernicus™ high performance GPS chip set. |
| This OEM module is designed for use in embedded and industrial applications
requiring high accuracy positioning and timing information. |
| It can also be used as a replacement and upgrade for users of the Trimble
Lassen™ SKII receiver module. |
| The NLC-SKII module is RoHS (lead free) compliant. |
- Ultra-high sensitivity of -160dBm (-190dBw), enabling high
performance acquisition and tracking in urban canyon and signal obscured
environments.
- Cold Start Time to First Fix (TTFF) is quicker than 38s.
- Low power consumption: 45mA @ 5V, with Power-Good LED.
- The 2 ports that can be configured to suit the customer’s
requirements such as: input and output protocols and transmission speed.
- Configuration parameters backed-up to an EEPROM.
- Pin to pin compatible with Trimble Lassen™ SKII GPS receiver;
same form factor, for ease of integration.
- Communication port outlet in 3V or 5V TTL level, depending on
the version.
- Protection against open and/or short circuit on the antenna (60mA),
and alarms reported through serial port.
- Accurate pps (pulse per second signal), better than 60ns.
- Optional: Antenna voltage selectable by internal switch: 3V or
5V.
- Optional: Back-up capacitor with an autonomy of 40 hours for hot
start-up after a power cut.
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The NLC-SKII module has successfully completed compliance testing in accordance
with the  directive. |
| Factory setting of the two ports |
| The two communication ports are set as standard as follows: |
Port |
Protocol
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Baud rate
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Data bits
|
Parity |
Stop bits
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Port1 |
TSIP |
38400 |
8 |
None |
1 |
Port2 |
NMEA |
4800 |
8 |
None |
1 |
| Options (for any requirement, please contact us) |
| Power supply voltage: |
3.3VDC |
| Backup: |
battery capacitor |
| Antenna connector: |
SMA, SMB low profile, MCX |
| Configuration switch: |
LED (ON/OFF)
antenna voltage (5V/3V) |
| Performance Specifications |
| Receiver : |
12-channel, continuous tracking receiver |
| Sensitivity: |
Tracking: –160 dBm
Acquisition (High "Indoor" Sensitivity mode): –148 dBm*
Acquisition (Standard Sensitivity Mode)**: -142 dBm |
| Accuracy: |
Horizontal: <2.5 meters (50%), <5 meters (90%)
Horizontal with SBAS: <2 meters (50%), <4 meters (90%)
Altitude: <5 meters (50%), <8 meters (90%)
Altitude with SBAS: <3 meters (50%), <5 meters (90%)
Velocity: 0.06 m/sec
PPS (Static): ±60 nanoseconds rms
PPS (Stationnary Mode "Indoor" @ -145dBm): ±350 nanoseconds
rms
Receiver Dynamics Limit @ -144 dBm: 2G**** |
| Acquisition: |
Hot start: 3 seconds
Hot start w/o battery backup***: 8 seconds
Warm start: 35 seconds
Cold start: 38 seconds |
| Reacquisition: |
2 seconds (after signal loss) |
* For Hot Start with ephemeris, otherwise
-146dBm.
** Standard Acquisition Sensitivity is the default setting. High mode should
be enabled for indoor applications.
*** Ephemeris is not older than 4 hours.
**** Receiver Dynamic Limit is 4G in open sky, Air Mode |
| Environmental Specifications |
| Operating temp: |
–40°C to +85°C |
| Storage temp: |
–55°C to +100°C |
| Electrical Charactistics: |
| Prime power: |
+4.5VDC to 5.5VDC
Power consumption: 45mA |
| Back-up power: |
+3.2VDC to 5.5VDC
Power consumption: 8µA typical |
| Interface Charactistics: |
| Serial ports: |
2 serial ports |
| PPS: |
3.0 V CMOS-compatible, TTL-level pulse, once per second |
| Supported Protocols: |
TSIP, TAIP, NMEA 0183 v3.0
Bi-directional NMEA messages
Messages
selectable by NMEA commands
Selection stored in flash memory |
| Physical Characteristics : |
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