SkyWave IDP 800 Series, Hardware Manual, Page: 27 / 102

IDP 800 Terminal Series - Hardware Guide
© SkyWave Proprietary 15 T209, Version 01
Table 8 Power Input Options
Terminal Mode External Voltage Internal Battery
Voltage
Terminal
Operating From
Power Off < PowerOffThreshold
9
Input < 6.2 (non-
rechargeable)
Input < 12 V
(rechargeable)
N/A
Power Save or
Processing > PowerOffThreshold Any input External Battery
Power Save or
Processing < PowerOffThreshold > 12 V (rechargeable)
> 6.2 V (non-
rechargeable) Internal Battery
In Power Off, the rechargeable battery has a 12 V threshold to provide deep discharge
protection for the battery. There is no deep discharge protection for the non-rechargeable
battery.
3.2.5 Load Dump Circuitry
External power connected to the terminal passes through a load dump protection circuit.
Parameter Voltage
Disconnect the terminal's low-voltage
circuitry from the external supply Input voltage > 35 V DC
Inherent protection +150 V
Terminal switches to battery power
(if connected) > 35 V
3.2.6 Fuse
The IDP-800 terminal has two internal fuses. The internal fuses provide protection in the
event of an internal power supply failure. The internal fuses cannot be reset and are not
field repairable.
3.2.7 In-rush Current
In-rush current transients occur when the terminal is:

First powered on.

Preparing for transmit. This is when the modem's internal voltage switches from
3.3V to 6.3 V.

Terminal starts to transmit. This is when the antenna's power amplifier is turned
on.
The maximum in-rush specifications @ 12 V DC are shown in Table 9.
9
PowerOffThreshold is defined in section 3.2