Operation Modes:

Geophone Tests: QC individual element or strings of geophones - Measures Resistance, Impedance, Sensitivity, Distortion, Polarity, Damping Frequency and Leakage, verifies polarity and performance

Hydrophone Tests: QC individual hydrophones or streamer sections - Measures electrical and acoustic properties, verifies accuracy and output

Vibrator Tests: QC vibrator performance in the field, using independent accelerometers - Includes amplitude and phase displays, force and distortion analysis, verifies correct ground force calculation and polarity

Bird Dog System Options:

Standard BD3-3

• BD3-3 Unit

• Geophone Wiring Harness – Connects Three Elements or Geophone Strings to unit

BD3-3 with Vibrator QC Kit

• BD3-3 Unit

• Two Magnetic Accelerometers

• Vibrator Interface Box – Connects True Reference and independent accelerometers to Bird Dog unit

• Records pilot signal, reaction mass acceleration, baseplate acceleration and ground force signals

BD3-3 with Hydrophone QC Kit

• BD3-3 Unit

• Hydrophone Sound Tube – Provides Uniform Input to Hydrophone Elements

• Hydrophone Amplifier – Matches Hydrophone Output to BD3-3

• Hydrophone Cable Set – Matching cables and connectors for hydrophones and tester

A/D

32 bit high-speed sigma delta converter

Anti-Alias Filters

85% of Nyquist frequency

Low Cut Filter

User Selectable – DC, 0.1 Hz, 2 Hz

Filter Type

User Selectable – Linear, Minimum Phase

Sample Rates

0.25, 0.5, 1, 2, 4, 8 ms

Max Input @ High Gain

0.31 Volts peak to peak

Max Input @ Low Gain

5.00 Volts peak to peak

Power Wake/Sleep

0.48/0.01 watts per channel

Input Impedance

20k Ohms

Clock Sync

GPS or VHF/Wire

Test Types

Geophones, Hydrophones and Vibrator Accelerometers

# Channels

3

Temperature

-40°C to +85°C

Humidity

0 to 100%

Size

14.0x5.5x3 in. (356 x 140 x 76 mm)

Weight

3.4 lbs (1.55 kg)

Data Storage (Internal 8GB CF)

480 hours for 3 channels @ 2ms

Data Format

32-bit float IEEE SEG-Y/SEG-D

LEDs

GPS/Recording LED, Battery LED

VibQC Option

+/- 12 Volt Input

Dynamic Range

126 dB

% THD

0.0012 %

Crosstalk

Better than -125 dB

CMRR

> 100 dB