Gain : 0 to 30dB / Bandwidth : 10Hz to 1MHz -6dB
Relativ input noise : <3uVr s @ 0dBgain
Relativ input noise : <2uVr s @ 20dBgain
Noise easure bandwidth : 500Hz to 8KHz
Cable lenght reco ended ax : 20 eter
10mAmp Loop for hydrophones with buildin current loop prea plifier like the etec 602 type.
This is a two-wire low i pedance trans ission line carrying both the power supply for the prea plifier
and the hydrophone returnsignal on the sa e two wires.
There are no drawback with this configuration co pared to conventional a plifier technology.
Distance ax : 100 eter cable RG58 style or eq.
Balanced input with buildin 48Volt phanto
power supply. Designed for connection of
standard studio icrophones with 3pole XLR
connectors.
It will drive the DPA icrophones serie 4000
studio icrophones as well as the their 8011
hydrophone.
These inputs ay also be used singlesided :
XLR pin1: GND=0V
XLR pin2: Positive input
XLR pin3: Negative input
See also www.DPAmicrophones.com
Input amplifier and Gain selector used to switch between the tree different input a plifiers. Gain is
privided here only with the prea plifier selection.
Bandwidth : 10Hz to 1MHz (700KHz @ 30dB gain)
Input SeaWa e filter 1.st order 6dB/octave / 10 Hz filter is 2.st order 12dB/octave.
Liniar input amplifier offering extra gain 10Hz to 1MHz.
Hydrophone Output signal presenting input selection. Used for recordings.
Detector Output signal sa e as the hydrophone signal but led through an envelope detector for audible
detection of sonar signals in the frequency range fro 20KHz to 700KHz.
Used for recordings.
Left and Right Line Inputs for external connection to the output power a plifiers.
Used for playback to the loudspeaker(s).
Source selector to switch between internal and external signal sources.
The output fro this point is led on to the Line output ter inals for recordings
and to the output level controls and thus to the power a plifiers.
It is not a legal situation to input select a hydrophone placed in the sa e edia as an underwater
loudspeaker and turn up the volu e.
This will cause oscillation at a very high frequency.
Output Le el Left and Right for controlling the level for the output power a plifiers.
Left and Right Line Outputs presenting whatever selected on the inputs.
Used for recordings.
Output Selector
switches between nor al two channel Stereo and the Bridge configuration.
OFF position utes the output but do not switch off the power to the a plifier.
Power output terminals
for the connection of an underwater loudspeaker
