BACKGROUND:
These components are all NEW, extracted from boxed, sealed & obsoleted Transcom (Australia) communications equipment. I envisage these components may be of interest to folks who like to experiment in the world of Global Navigation Systems.
GNSS encompasses all satellite based navigation systems, not just the commonly referred to GPS (USA) but also Galileo (European Union), BeiDou (China) & GLONASS (Russia) being the major players along with QZSS (Japan) and NavIC (India) being for more localised coverage not global. These all operate within the L band, and centre (in broad terms) around the 1.5GHz frequency. There is plenty of information about these mixed bag of military & commercially controlled systems online and it makes for pretty interesting reading (if the subject is your "bag")
This LR9540 module was part of the excellent communications equipment from Transcom (Australia), designed and manufactured in Australia except for two modules inside the unit. This Transcom equipment is now obsolete, meaning that the original functional design of the equipment is no longer of any use in the marketplace obsolete terrestrial data networks used) but "sections" of the equipment are just as useful as they were 20 years ago.
The equipment comprised TWO distinct "sub sections" dealing with RF, one being bi-directional communications with the terrestrial data network using 2/3G ... not 4G or 5G (it hadn't even been created at the time this equipment was designed) - as a module for use in many (but not all) countries, particularly Australia, it is useless (all such systems were turned off quite a while ago). However some countries MAY still be using GPRS/CDMA data communications (800~900MHz & 1.8~1.9GHz) so I have just as carefully extracted and retained this network data module.
What is useless for many MAY not be useless for the entire world - this module (from Motorola) is available HERE (not yet a live link!) and Yes, this data network module is offered at no charge (but still subject to shipping costs, if applicable)
The other module is of primary interest, the well known LR9540 based on the SiRF LSI GSP2e/LP-7450
This module is a high performance, low power requirement 12 Channel with TTL level output GNSS receiver with very fast "time to first fix" time.
Here is a photograph of the two modules installed in the original equipment.
Here is some extracted information from the datasheets which are readily available online or I do also have a copy locally.
I have also included a pinout function diagram in one of the main photographs
Now I must make it clear that this module, and the associated components I am offering, are all NEW and have never been used, I am the first person to touch them since they left the factory. The original equipment was supplied to end users (technical department) as part of the TRANSCOM product line based on the VTX3000X Mobile Communications Gateway. Realising that the equipment as it stood was useless for any commercial use, I took it into the "operating theatre" (workshop) in my capacity as Chief Surgeon and under strict ESD safety precautions, useful sections were removed from the patient. This equipment has never seen "turn on" at all.
I realise that some folk may not want the module but instead may like the short interfacing coaxial lead or perhaps the nifty GNSS antenna module ... with this in mind, the components are all offered individually so that those interested may purchase a LR9540 module alone or perhaps just the antenna's. I have also enabled automatic discounting, meaning that when multiple components are purchased, the price will be discounted automatically in the checkout.
GNSS/GPS Receiver Module
Country of origin Taiwan
LR9540 (Rev. D)
Originally released around 2004 but I suspect this revision dates from around 2006
OEM product, most likely from Leadtek
Ports: MMCX (RF input) & 20 pin male connector (2 row x 10 Gold plated)
PCB Dimensions: 40mm x 71.3mm
Metal shield (removable - flip top style) for the RF input section, meaning that you can investigate this section quite easily.
4x corner holes for PCB support - originally this module used plastic standoffs
Since "The Operation" (which was undertaken using strict ESD safety precautions), this module is now within a sealed ESD packet awaiting a new purpose in life!
RF Interconnect Lead
Country of origin is unknown but it could well be that this was put together locally (Australia) - well made in any case.
This is a short lead which used to run between the LR9540 and the equipment rear panel, for connection of the GPS antenna. Of course, it would be equally suitable for any interconnects requiring these types of connectors, up to around 2GHz should be fine ... low power of course.
Length: 180mm
Unbranded RG 174/U 2.7mm OD coaxial cable with heatshrink at each end (SUMITUBE)
Gold plated connectors are not branded, MCX (male) to SMA (female) and this connector includes the Gold plated lock washer and nut as originally fitted.
Packed into a sealed, clear plastic packet
ANTENNA MODULE With Coaxial Lead
Country of origin is unknown
Antenna "block" is fully encapsulated in plastic with a metal base plane. The original 2x screws for the base plate are included.
You cannot get inside the antenna block, it is completely sealed but that said, it was originally intended for "indoor" or protected area use such as internally within a vehicle i.e not exposed directly to the elements.
Antenna dimensions: 35mm x 36.7mm x 12.8mm height
Side exit of the coaxial cable (RG-174/U) from this block
Length of coax is 2.5 metres
Terminated with an SMA Male Gold plated connector
Packed into a sealed, clear plastic packet
