Harold Lythall Email & Phone Number

Stockholm, Stockholm County, Sweden

Kista / Rosersberg Gic, Sweden

RF Test engineer at Ericsson Integration & Verification LTE RF simulation laboratories but driving heavy cost saving projects in RF components. Subject "expert" in installation planning team. Based in Kista from 2013 - june 2015. Now based in Ericsson Global ICT Centre, Rosersberg.Fault-finding, configuring and maintaining units, and giving RF advice in LTE laboratories. Educating / Knowledge sharing to improve colleagues competence. Sometimes travel to lead classroom education of up to 70 students in RF safety, antenna, etc.Additional skills require in this position include UNIX/LINUX to edit and write new configuration files as new nodes are moved into the laboratories.

Kista

RF Test engineer at Ericsson Integration & Verification.Configuring, maintaining and advising on installation for LTE simulation laboratories. In the network there are about 150 LTE nodes, 120 "air interface simulators" (custom units) and about 1200 user mobiles.Additional skills require in this postion include UNIX so edit and write new configuration files as new nodes are moved into the laboratories.

Sundbyberg, Stockholm (Sweden)

Required experience in RF technologies and Mobile Wireless Systems, plus experience of installation, configuration of RF equipment, troubleshooting & maintenance, deep knowledge in Mobile Wireless Communications GSM-R/GSM/UMTS/Tetra. I also needed knowledge of RF Repeaters Systems coupled with a willingness to travel. I also demonstrated excellent teaching skills to educate customers engineering staff in both RF and repeater technology, antenna systems and basic radio.Responsibilities included:Commissioning and optimisation of Repeater RF Coverage Solutions, deployment of In Building RF Coverage solutions, performing surveys and RF measurements on site, and writing reports to document all work. In this roll I had to maintain a very good relationship with customers.The work involved working with repeaters (RF cell-enhancers, on-frequency repeaters) used to extend radio coverage from other radio services and are predominantly used in underground railways and railway carriages.Frequency areas include TETRA/RAKEL, GSM-R, FM boradcast, and of course "domestic" GSM and UMTS.The position involves network planning, extensions, RF coverage surveys, and very heavy customer liason/support at all levels. I do love the work, but the conditions could be better.I have taken several "trackside courses" (in Swedish), for work in the Stockholm underground and I have even work in the Malmö underground and SJ railway tunnels.Kat-19 spår/tunnel behörig - t.o.m. 2014IPAF (PAL) Scissor and boom-lift operator (Ramirent) - valid until 2015.

Researched installation methods and practices for end-user documentation. Well below my capabilities, but it was a foot in the Swedish job market, which lasted 14 years.For 10 years I held responsibility for sound manuscripts, sound quality, and technical content in video and multimedia educational films. I was also the narrator/presenter and even installer for some 750 educational video film clips.Although the video courses were intended as educational tools, they have been used a “FOA” (First Office Application) to prove radio installations of new equipment, and to provide input to customer product information manual writers, as source material.

Kista, Stockholm (Sweden)

Continued to work for Ericsson exactly as before, but as a consultant through Semcon.

In detail:Install and commission nationwide comms system in Saudi Arabia, then maintenance of the system in Jeddah, and Riyadh.Management of up to 15 locally employed workshop staff, creating maintenance instructions, radio system fault finding beyond the scope of normal workshop staff. Design & implementation of special customer needs, for example:1. Communications “connect” panels. A system for inter-connecting 14 VHF voice repeaters, used by National Guard, in two regions (Jeddah & Mecca), allowing controllers in one region to control the system in another region. Involved design & production of analogue plug-in “splitter panels” to divide control in two directions.Divided audio + E&M, and routed control traffic over microwave telephone MUX to other region. Plug-in approach eliminated the need for permanent modifications.2. AC 230 V no-break supply. Unstable local AC power caused computer crashes. DC-AC converters designed to provide modems with AC power, derived from an existing 24 V DC no-break supply.3. Interface units (RF cavity/tuned circuit) to isolate DC, when 12 V radio equipment is installed in 24 V vehicle (the “royal bus”). Unit used tightly coupled 450MHz resonant tuned circuits, with no DC continuity.4. Emergency repeater. Microwave (MUX) for telephone traffic disabled by a building site crane obstruction. I used two local cross-coupled TX/RX to relay the VHF network to the UHF mobiles used by North Jeddah palace guards.5. Designed solar regulator to charge & cycle backup batteries. The power used for security forces radio coverage at Riyadh camel races, and Jeddah to Medina road during the annual holy pilgrimage.6. Design simple test equipment, such as an accurate AF alignment tool for LF signalling tones (71.2Hz CTCSS). Local test gear limited to +/- 1Hz. My instrument was +/- 0.01Hz.Functioned as a system trouble-shooter for other regions.

(2 year break, in UK, from C&W above)I was initially employed for site installation and commissioning of Tait Mobile Radio (UK) radio communications equipment, for example, repeaters, community repeaters, “Trunked Radio” (earlier version of TETRA and RAKEL) to MPT1327 and MPT1341.I assumed the roll of radio/electronic designer due to shortage of staff (the expert was offered another job). Examples of projects I designed include:1. Portable repeaters. These comprised two pairs of transmitters and receivers (transceivers) to extend the range of the police radio communications system for temporary or emergency local communications. The system was used by 90% of the UK police force.2. Logic control system to select and establish radio communications between Norwegian tankers and oil platforms, for computer monitoring of oil delivery.3. On-board analogue intercom system. Used by Huntingdon (UK) fire services so fire-fighting teams can communicate during high ambient noise conditions.4. Modification of VHF FM mobile transceivers to provide RS232 data output. Used by UK ambulance service to give written confirmation of instructions to paramedic teams.5. Design of simple digital RF synthesizer. Unit used to demonstrate synthesizer principle during full time education of dealer’s technicians and engineers in Tait products.

Supervision of factory production lines, for radio system components, followed by laboratory functional tests and alignment of the system prior to leading a field installation and commissioning team, worldwide. Responsibilities included management of installation teams and technical support to other installation teams. Techniques and functions included:1. VHF and UHF analogue radio repeaters, control panels for PMR / LMR.2. Alignment and test of cavity duplexers, diplexers and filters.3. Quasi-synchronous FM transmitter installation and alignment.4. Automatic site select of received transmissions (ASSORT) equipment alignment.5. Multi-receiver “signal quality voting” equipment alignment and repair.6. Community repeaters (Shared repeater system).7. Full time education of customer’s staff in RF, digital, microprocessor and synthesizer operation.8. Service department repair of the complete range of PYE Telecom equipment.I also served in service and repair depot for the complete range of PYE telecommunications equipment.

This is where I sat on a RF test bench and trimmed/aligned/tested 2-way (analogue) radio communications equipment as they came off the production line.I always filled my quota in about 1/2 the allocated time then had the other bench engineers feed me their difficult faulty sets. I got a kick out of getting them working, sometimes a really good laugh at the production faults.

C&G, Radio Communications

Activities and Societies: Radio communications practices and procedures, circuit design, transmitters, receivers, transmission-line.

Engineer, Radio Communication, Airfield Comms And Navigation Aids

Activities and Societies: Airfield communications and navigation aids, including vehicular mobile radio, ILS, CADF, NDB, etc. Crypto.

1-Year Apprenticeship, Medical

Activities and Societies: I managed small in-patient wards (ward orderly - during the Christmas 1969 influenza epidemic). On an RAF.