ONLINE ELECTRONICS LTD
PR1_5001_A01 Page 4 of 8
1. GENERAL DESCRIPTION
The PR1 Pinger Receiver is a portable handheld acoustic receiver designed for locating and
tracking acoustic pingers underwater. The PR1 has a bandwidth of 2kHz and the centre
frequency that can be adjusted in 0.1kHz steps between 3kHz and 97kHz. The current
frequency setting is displayed on a backlit LCD mounted on the faceplate.
The received signal strength is indicated via an LED Bar Graph (Signal Strength Meter) and
through an audio output that connects to a Diver Earpiece (included).
The volume, frequency and sensitivity of the unit are controlled via knobs located on the
faceplate. A magnetic compass is incorporated on the top of the unit.
FIGURE 1: PR1 EXTERNAL ASSEMBLY
The PR1 Pinger Receiver unit is directional and as such, only detects acoustic signals (of the
selected frequency) that enter the receiver window within a (typically) 30° beam angle centred
along its central axis. By scanning the PR1 around, the direction of any acoustic sources within
range and of the target frequency, can be determined. Reducing the sensitivity also decreases
the beam angle, allowing acoustic sources to be accurately pinpointed once in close proximity.
The PR1 is powered by a rechargeable NiCad battery pack that allows the unit to operate
continuously for up to 17 hours before it requires recharging. The included battery charger
requires a 240Va.c source in order to charge the battery.
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