Mounting A Handset In The Cradle - BRUEL & KJAER HF HATS 5128 User Manual

38 High-frequency Head and Torso Simulator (HF HATS) Type 5128 – User Manual
4.2.2

Mounting a Handset in the Cradle

Fig.4.10
The cradle mounted in
the alignment jig with
a handset
For the given handset, make sure that the centering forks are placed in suitable holes in the cradle
bar. The optimum way of positioning the centering forks is so that they point in opposite
directions, that is, the centering fork closest to the sight points forwards and the rear centering
fork points backwards. Position the forks so they do not interfere with any buttons placed on the
side of the handset.
1) Place the cradle in the alignment jig and tighten the knob on the back of the fixture.
2) Retract the front and rear supports and the end stop. Widen the centering forks so that they
will not interfere with the handset.
3) Tip down the sight and lock it in position.
4) Make sure that the handset can be supported by both support feet. If necessary, move the
rear support to a different mounting socket.
5) Position spikes in the support feet so that they support the handset. The general method is
to use three spikes: one in the rear support foot and two in the front support foot, or vice
versa. Spikes come in two lengths, 5 mm and 20 mm.Choose spike positions that do not
interfere with projections caused by cameras, batteries, antennas, etc. When fitting the spikes
into the support feet, twist them slightly to ensure that they seat properly.
6) Position the handset so that its ECRP is in the middle of the alignment jig sight
7) Extend the front support directly below the ERP until the ear-cap plane is positioned correctly
against the underside of the sight.
8) Extend the rear support until it just supports the other end of the handset.