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Gemini G3 - User Manual
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RECEIVER
UHF
25 kHz Channel
700 MHz
50 kHz Channel
800 MHz
25 kHz Channel
800 MHz
NPSPAC Channel
Selectivity
77 dB typical
>75 dB @ 25 kHz
>65 dB @ 12.5 kHz
68 dB typical
>65 dB @ 50kHz
>60db for ADB model
77 dB typical
>75 dBm @ 25kHz
>70dB for ADB model
77 dB typical
>75 dB @ 25kHz
>70dB for ADB model
Offset Channel Selectivity
(NPSPAC only)
n/a
n/a
n/a
20 dB
(as per TIA 2.1.7)
Intermodulation
80 dB typical,
>75 dB
78 dB typical,
>75 dB
>70 dB for ADB model
80 dB typical,
>75 dB
>70 dB for ADB model
80 dB typical,
>75 dB
>70 dB for ADB model
FM hum & noise ratio*
>45 dB @ 25 kHz
>50 dB @ 150 kHz
>45 dB @ 25 kHz
>45 dB @ NPSPAC
UHF
700 MHz
800 MHz
Spurious Response
>80 dB
>75 dB for ADB model
Receive Frequency
Range
403-512 MHz
762 - 776 MHz
851-869 MHz
Conducted spurious
< -57 dBm
* Psophometrically weighted filter
GeminiG3 Rx Sensitivity
(for 1% Packet Error Rate (PER) with Parallel Decode at carrier frequency)
UHF
12.5 kHz Channel
UHF
25 kHz Channel
700 MHz
50 kHz Channel
800 MHz
25 kHz Channel
800 MHz
NPSPAC Channel
-100 dBm @ 32kbps
-106 dBm @ 24kbps
-109 dBm @ 16kbps
-97 dBm @ 64 kbps
-103 dBm @ 48 kbps
-107 dBm @ 43.2 kbps
-109 dBm @ 32 kbps
-94 dBm @ 128 kbps
-100 dBm @ 96 kbps
-106 dBm @ 64 kbps
-94 dBm @ 64 kbps
-100 dBm @ 48 kbps
-104 dBm @ 43.2 kbps
-106 dBm @ 32 kbps
-103 dBm @ 32 kbps
-109 dBm @ 24 kbps
-115 dBm @ 16 kbps
GeminiG3 - ADB model
covers in a single unit 700MHz – 50 kHz, 800 MHz – 25 kHz & NPSPAC channels. The
sensitivity specs for the ADB model are presented below:
GeminiG3-ADB model Rx Sensitivity
(for 1% Packet Error Rate (PER) with Parallel Decode at carrier frequency)
700 MHz
50 kHz Channel
800 MHz
25 kHz Channel
800 MHz
NPSPAC Channel
-93 dBm @ 128 kbps
-99 dBm @ 96 kbps
-104 dBm @ 64 kbps
-94 dBm @ 64 kbps
-100 dBm @ 48 kbps
-104 dBm @ 43.2 kbps
-108 dBm @ 32 kbps
-103 dBm @ 32 kbps
-109 dBm @ 24 kbps
-115 dBm @ 16 kbps