SkyWave IDP-782 - Audio; GPRS Audio; Table 5: Hardware GPS and Dual GPS;GLONASS Specifications

IDP-782 - Hardware Guide
Table 5: Hardware GPS and Dual GPS/GLONASS Specifications
Parameter GPS GLONASS
Time to First Fix
1
Cold Start
29s 30s
Warm Start
28s 25s
Hot Start
1s 1s
Sensitivity
Tracking
-162 dBm -158 dBm
Hot Start
-156 dBm -156 dBm
Cold Start
-148 dBm -140 dBm
Accuracy
Horizontal Position (CEP)
2
2.5/2.0 m 4.0 m
Velocity
0.1 m/s 0.1 m/s
Heading
0.5 degrees 0.5 degrees
3.8 Audio
The GPRS cellular module provides one analog differential audio interface and a digital audio
interface.These interfaces are only for emergency purposes. The analog audio input can be connected to
the output of an external analog audio device or an external electret microphone.
The HSPA cellular module supports a digital audio interface. The digital audio interface produces the
applicable analog signals for the external microphone and speaker.
3.8.1 GPRS Audio
Parameter Min. Typical Max. Units
Microphone
Microphone bias voltage - 2.2 - V
Microphone supply current - - 4 mA
Load resistance 1 - - kΩ
Differential input voltage - - 0.8 Vpp
Differential input resistance - 50 - kΩ
Common mode DC voltage - 0.5 - V
Signal to noise 75 - - dB
Bandwidth 300 - 3900 Hz
1
All satellites at -130 dBm
2
CEP, 50%, 24 hours static, -130 dBm
T213, Version 02
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