ASTRO FHP2, Руководство по эксплуатации

Страница: 6 / 34

FHS2 user manual (release 1.0)
5
2 Brief description
The optical laser source FHS2 is suitable for use as a small, handy laser transmitter
that allows attenuation in optical fibres, fibre optic splitters, patch cables etc. to be
measured with the aid of an optical level meter at the other end of the line.
The laser sources emits laser light within a 1310 mm or 1550 mm range, which can
be set within a level range of –8 dBm to –2 dBm (–5 dBm +/– 3 dB). Settings can be
made in increments of 0.1 dB using the arrow up/down.
Depending on the adapter used, SC and FC connectors (LC with a special adapter is
also an option) with 0° PC or UPC angle polish can be connected.
If power is applied to glass fibres with an 8° APC, then a hybrid cable from UPC to
APC is required on the laser source (e.g. connector 1: FC/UPC, connector 2:
FC/APC).
If an APC 8° cable is connected to the laser source, then approx. 3.5 dB to 4.0 dB are
lost due to the air gap at the connection, and the value displayed by the laser source
no longer corresponds to the real optical power input.
2 × 1.2 V Ni-MH AA rechargeable batteries should be used for the power supply, and
can be inserted in the battery compartment on the rear. The external power supply unit
included can be used to supply the device with power even when no batteries have
been inserted, while also providing the charger for the 2 × AA rechargeable batteries.
The device is switched on by briefly pressing the ON/OFF button and is then set to
AUTO-OFF mode, which switches the device off automatically after approx. 5 min. If
the ON/OFF button is pressed for >2 sec., then AUTO-OFF mode is switched off.
Backlighting for the display can be activated using the Light button once the device has
been switched on. Pressing it a second time switches the backlighting off again.
A range of adapters (e.g. FC or SC, along with LC when applicable) are included, which
can be screwed onto the device. The adapters for the laser source FHS2 are labelled
with LD (laser diode) and must not be mixed up with the adapters for the optical power
meter FHP2, which are labelled with PD (PIN diode). There must be no dust at all when
fitting the adapters. Contact surfaces must be cleaned using technically suitable
cleaning devices or cleaning agents and cleaning methods to avoid having
measurements falsified by dust and other particles.
After use or once the measurement is complete, ensure that the dust cap is screwed
onto the optical input to prevent contamination of the laser in the device.
DRAFT VERSION