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HARDWARE SPECIFICATIONS
VR60 RECEIVER SPECIFICATIONS
RECEIVER TYPE: Heterodyne, 455.2 kHz IF.
FREQUENCY RANGE: 10 kHz to 99.9 kHz.
BANDWIDTH: 500 Hz (Crystal filter 3 dB points)
IMAGE REJECTION
RATIO:
50 dB.
GAIN: 72 dB (Not including hydrophone pre-amp).
GAIN CONTROL: 66 dB Dynamic range Automatic Gain Control (AGC), or manual
control in 6 dB increments.
LOCAL OSCILLATOR: PLL Frequency synthesizer, 3.2768 MHz reference with 100 Hz
channel spacing.
NUMBER OF
CHANNELS:
900 possible frequency channels under keypad control, if fitted with
decoder Option 01.
STANDARD
CHANNELS:
11 Preset channels available with the front panel rotary switch.
Channels are stored in EPROM and can be changed upon request (see
Option 08).
CHAN #1 12.500 kHz
CHAN #2 29.000 kHz
CHAN #3 30.720 kHz
CHAN #4 31.500 kHz
CHAN #5 32.768 kHz
CHAN #6 34.000 kHz
CHAN #7 50.000 kHz
CHAN #8 60.000 kHz
CHAN #9 65.536 kHz
CHAN #10 69.000 kHz
CHAN #11 76.800 kHz
PULSE DETECTION: Pulse amplitude and width discrimination circuit provides 5 volt logic
signal for each pulse detected. A front panel LED is also flashed for
visual indication. Sample rate of pulse detector is 1 mSec. Pulses under
5 mSec are rejected as invalid.
PULSE ECHO
REJECTION:
120 mSec of echo rejection for above. Pulse detection signal and front
panel LED.
AUDIO OUTPUT: Internal speaker with volume control on front panel. Audio power
output is 300 mW.
HYDROPHONE TYPE: Three pin signal & power connector for hydrophones containing
internal preamps. Compatible with CAI CS-40, and all VEMCO
hydrophones.
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