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Diamond Point International

Naelcom Lassen iQ/SQ Clone - Fit/Form Compatible Trimble Lassen iQ/SQ

Replace legacy Trimble Lassen iQ and Lassen SQ modules


NLC-iQ is a GPS receiver based upon the popular Trimble Copernicus II surface mount receiver. It has been designed to be a fit/form replacement for the end of life Trimble Lassen iQ and Lassen SQ modules.


Mechanical - The NLC-iQ has the same mechanical dimensions as the Lassen iQ and SQ. It has the same 8 pin data connector as the Lassen iQ/SQ and has the same antenna connector (both located in the exact same locations as found on the iQ and SQ). The only thing that it doesn't have is the metal shield. As you can see in the picture above, the board has four pins which are a substitute for the solder tabs which the metal shield has. The Copernicus II does not require a metal shield.

GPS Protocol - The Lassen iQ supported Trimble's TSIP (Trimbles own binary based protocol), NMEA (industry standard ASCII protocol) and TAIP (Trimble's own ACSII protocol). The Copernicus II supports all of these protocols.

Serial Interface - the Copernicus II has one limitation which is that the serial port parity is not configurable (only 'NO' parity is supported). Trimble's Lassen iQ and SQ supported ODD, EVEN and NO parity with a default of ODD parity. This default setting might affect compatability for some customers.

Performance: The Copernicus II is a far superior product to the SQ and iQ. It supports more concurrent satellite tracking, faster startup and is much more sensitive.

What It Replaces:

This module can replace all released Lassen iQ / Lassen SQ modules including:

  • Trimble 46240-00 Lassen SQ (Non RoHS)*
  • Trimble 46240-05 Lassen SQ (RoHS)*
  • Trimble 46240-10 Lassen iQ (Non RoHS)
  • Trimble 46240-20 Lassen iQ (Non RoHS)
  • Trimble 46240-25 Lassen iQ (RoHS)

* Lassen SQ compatability depends on how the unused pins are connected.


Product Specification

GeneralL1 (1575.42 MHz) frequency, C/A code
12-channel, continuous tracking receiver
Update rateTSIP @ 1 Hz; NMEA @ 1 Hz; TAIP @ 1 Hz
AccuracyHorizontal: <2.5 meters (50%), <5 meters (90%)
Horizontal (with SBAS accuracy): <2 meters (50%), <4 meters (90%)
Altitude: <5 meters (50%), <8 meters (90%)
Altitude (with SBAS accuracy): <3 meters (50%), <5 meters (90%)
Velocity: 0.06 m/sec
Static PPS: ±60 nanoseconds
PPS (Stationary Mode "indoor" @ –145dBm): ±350 nanoseconds
AcquisitionReacquisition: 2 sec
Hot Start (with battery): 3 sec
Hot Start (no battery): 8 sec (ephemeris not older than 4 hours)
Warm Start: 35 sec
Cold Start: 38 sec
Out of the Box: 41 sec
Operational LimitsVelocity: 515 m/s
Receiver Dynamics: 2G
SensitivityTracking Sensitivity: -160dBm
Acquisition Sensitivity: -148dBm*
* For hot start with ephemeris, otherwise -146dBm
PPS3.3 V CMOS-compatible pulse, once per second
ProtocolsTSIP, default: 38400, 8, None, 1 (parity not configurable)
NMEA, default: 4800, 8, None, 1 (parity not configurable)
TAIP, default: 4800, 8, None, 1 (parity not configurable)
Note: These are the defaults of the Copernicus II - all but parity can be changed via a Trimble software tool (either individually or in batch mode)
Serial PortsTwo 3.3 V CMOS, TTL compatible serial ports


ElectricalPrime Power: 5VDC, ±5%
Power consumption (board only): 65mA
Back-up power: +2.7 to +5V DC
Back-up consumption: 7 microAmps @ +3.0V
• RF: H.FL
• I/O: 8-pin (2x4), 1.27 mm header

Dimensions: 26 mm x 26 mm x 9 mm
TemperatureTemperature range (operation): -40 to +85°C
Temperature range (storage): -55 to +100°C
Humidity5% to 95% RH non-condensing @ 60°C
Warranty1 Year

Ordering Details

BoardNLC-iQ-CP2 Lassen iQ/SQ clone based upon Copernicus II module
Accessories66801-00 3.0V, 27dB GPS antenna, 80mm cable, HFL connector, unpackaged (replaces 57859-00)
66800-50 3.0V, 27dB GPS antenna, mag mount, 5 meter cable, MCX connector (replaces 56237-50)
66800-52 3.0V, 27dB GPS antenna, mag mount, 5 meter cable, SMA connector (replaces 56237-52)