LDI DIGISONDE 4D - Specifications; Figure 1-7: Sounder Transceiver Sub-System (Rear View); Table 1-1: Digisonde-4 D Specifications

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DIGISONDE-4D
SYSTEM MANUAL
VERSION 1.2.11
SECTION 1 - GENERAL SYSTEM DESCRIPTION 1-9
Figure 1-7: Sounder Transceiver Sub-System (Rear View)
1:12. A color monitor and keyboard are provided for installation, maintenance, and testing purposes, but are
not required for remote operation. The GPS receiver is mounted externally to the sounder site building.
SPECIFICATIONS
1:13. Table 1-1 provides Digisonde-4D specifications.
Table 1-1: Digisonde-4D Specifications
Quad Receiver
Frequency Range
0.5 – 30 MHz (all modes of operation)
Bandwidth
34 kHz @ 3 dB
Input Impedance
50 Ω
Noise Figure
11 dB (at receiver antenna preamplifier)
Receiver Sensitivity
-130 dBm (+/-6 dB) into main chassis; better at preamplifier
(amount depending on preamp gain setting)
Dynamic Range
>90 dB instantaneous
>140 dB total operating range including gain control
Recovery Time
40 μs
Output
16-bit quadrature samples