Guard band

In radio, a guard band is an unused part of the radio spectrum between radio bands, for the purpose of preventing interference.

It is a narrow frequency range used to separate two wider frequency ranges to ensure that both can transmit simultaneously without interfering with each other. It is used in Frequency division multiplexing. It may be used in both wired or wireless communications, so that adjacent frequency bands on the same media can avoid interference.

The spectrum can also be licensed for low-power devices such as a private mobile phone network.

References

Grenadier Guards

The Grenadier Guards (GREN GDS) is an infantry regiment of the British Army. It is the most senior regiment of the Guards Division and, as such, is the most senior regiment of infantry. It is not, however, the most senior regiment of the Army, this position being attributed to The Life Guards. Although The Coldstream Guards were formed before The Grenadier Guards, the regiment is ranked after the Grenadiers in seniority as, having been a regiment of the New Model Army, the Coldstream served the Crown for four fewer years than the Grenadiers (the Grenadiers having formed as a Royalist regiment in exile in 1656 and the Coldstream having sworn allegiance to the Crown upon the Restoration in 1660).

The grouping of buttons on the tunic is a common way to distinguish among the regiments of Foot Guards. Grenadier Guards' buttons are equally spaced and embossed with the Royal Cypher reversed and interlaced surrounded by the Royal Garter bearing the royal motto Honi soit qui mal y pense (Evil be to him who evil thinks). Their "Buff Belt" brass clasps also carry the Royal Cypher. Modern Grenadier Guardsmen wear a cap badge of a "grenade fired proper" with seventeen flames. This cap badge has to be cleaned twice a day – once in the morning, and once in the afternoon. A tarnished grenade is severely frowned upon.

1st Battalion (Australia)

The 1st Battalion was an infantry battalion of the Australian Army. Although its numerical name was designated during the First World War, the 1st Battalion can trace its lineage back to 1854, when a unit of the Volunteer Rifles was raised in Sydney, New South Wales. This unit has since been redesignated a number of times, but through its links with the units of the colonial NSW defence force, the battalion's history includes services in the Sudan and South Africa. During the First World War, the 1st Battalion was raised for overseas service in 1914 as part of the First Australian Imperial Force. Attached to the 1st Brigade, the battalion served in Egypt initially before taking part in the fighting in Gallipoli against the Turks. Later the battalion was sent to the Western Front where it fought in the trenches in France and Belgium as part of the Australian Corps. Following the end of the war the battalion was disbanded in 1919.

Wellington Barracks

The Foot Guards Battalions on public duties in London are located in barracks conveniently close to Buckingham Palace for them to be able to reach the Palace very quickly in an emergency. In central London, three companies are based at Wellington Barracks, Westminster, about 300 yards from Buckingham Palace between Birdcage Walk and Petty France. Wellington Barracks is also home to all of the Foot Guards bands and all of the Regimental Headquarters.

History

Wellington Barracks were designed by Sir Francis Smith and Philip Hardwick and opened in 1833. The Guards Chapel was rebuilt in the 1960s after the original chapel was destroyed by a bomb in World War II. On 31 August 2007, Diana, Princess of Wales' two sons, Prince William and Prince Harry, organised a memorial service in her honour on the 10th anniversary of her death in the Guards Chapel. The Grenadier Guards, Coldstream Guards and Scots Guards currently have a company based at the barracks.

Amenities

Wellington Barracks has many amenities open to those working and living within the Barracks. There is a NAAFI Bar for the Junior Ranks, which has many games available including horse racing and snooker tables. The NAAFI shop with a self-serve restaurant, a masseur and Corporals' Mess are located here. There is a Single Serving Personnel Room with internet access available, as well as an Interactive Learning facility open to all serving soldiers and their dependants. Elsewhere there is an Officers' Mess, Sergeants' Mess, and a gymnasium with squash courts. The Guards Museum houses a collection of uniforms, colours and artifacts spanning over 300 years of history of the Foot Guards. The Flanders Fields Memorial Garden is situated in the barracks, adjacent to the Guard's chapel.

Queen's Guard

The Queen's Guard and Queen's Life Guard (called King's Guard and King's Life Guard when the reigning monarch is male) are the names given to contingents of infantry and cavalry soldiers charged with guarding the official royal residences in the United Kingdom. The British Army has regiments of both Horse Guards and Foot Guards predating the English Restoration (1660), and since the reign of King Charles II these have been responsible for guarding the Sovereign's palaces. Contrary to popular belief, they are not purely ceremonial and are operational-duty soldiers armed with functional firearms loaded with live ammunition.

Operating area

The Queen's Guard and Queen's Life Guard are mounted at the royal residences that come under the operating area of the British Army's London District, which is responsible for the administration of the Household Division. This covers Buckingham Palace, St James's Palace and the Tower of London, as well as Windsor Castle. The Queen's Guard is also mounted at the sovereign's other official residence, the Palace of Holyroodhouse, but not as often as in London. In Edinburgh, the guard is the responsibility of the resident infantry battalion at Redford Barracks. It is not mounted at the Queen's private residences at Sandringham or Balmoral.