12.8.7 GNM Clock
Receiver Type
184-channel
GPS, GLONASS, Galileo, Beidou
Frequency Band:
GPS:
L1C/A (1575.42 MHz)
L2C (1227.60 MHz)
GLONASS:
L1OF (1602 MHz + k*562.5 kHz
L2OF (1246 MHz + k*437.5 kHz
k = –7,..., 5, 6
Galileo:
E1-B/C (1575.42 MHz)
E5b (1207.140 MHz)
Beidou:
B1I (1561.098 MHz) B2I (1207.140 MHz)
Accuracy of Pulses:
Dependant on oscillator option:
< +-100ns (TCXO, OCXO LQ)
< +-50ns (OCXO-SQ, -MQ, -HQ, -DHQ)
Synchronization Time:
<1 minute in normal operation mode,
approx. 1 minutes after a cold start
(12 minutes in GPS only mode)
Signal Gain
40 dB
Antenna Gain:
≥
3.5 dBic /
≥
3 dBic
Connection Type:
SMA female / Antenna
Cable:
shielded coaxial line (Belden H155)
Cable lenght: deductible up to max. 70 m
Power Supply
5 V DC (via antenna cable)
Nominal Impedance:
50 Ohm
Backup Battery Type:
CR2032 – button cell lithium battery.
The hardware clock and the RAM are battery buffered. When the main power supply fails,
the hardware clock runs free on quartz basis and the almanac data is stored in the RAM.
Life time of lithium battery: min. 10 years
Figure right:
GNM Multiband receiver and
GNM with XHE-SPI connector (optional)
50
Date: 2nd July 2020
IMS - LANTIME M4000