GF-8801, GF-8802, GF-8803
Hardware Specifications
SE19-410-006-00
1
1 Outline
This document describes the hardware specifications of GF-8801, GF-8802 and GF-8803 which is the GNSS
Disciplined Oscillator (GNSSDO). This document uses GNSS as general term of GPS, GLONASS, Galileo and
QZSS.
2 Function Overview
This product is a GNSSDO that can provide PVT (Position, Velocity and Time) information. Figure 2-1 shows
the block level diagram. Main features are as follows:
Supports GPS, GLONASS, Galileo, QZSS (L1C/A, L1S) and SBAS.
Provides 1PPS with high accuracy and stability synchronized with GPS time or UTC time.
Provides clock signal (VCLK 10MHz) synchronized with 1PPS.
Software upgrade capability by Flash ROM.
Active Anti-Jamming capability to suppress effects of CW jammers.
Effects Multi-path mitigation.
GNSS high sensitivity.
An expensive external power supply component is unnecessary since an LDO is built in.
Coaxial connector (RF_COAX) or IF connector (RF_PIN) for GNSS signal input are selectable.
GF-8701, GF-8702, GF-8703, GF-8801, GF-8802 and GF-8803 are pin compatible.
Notes:
1) The specifications of power consumption, PPS and 10 MHz are different.
Multi GNSS
receiver chip
eRide
OPUS 7
Serial Flash
ROM
Antenna detection
block with over current
detection function
System power supply block
ITXD
IALM_N
ILOCK
IGCLK
Reset control
block
ESD
Protector
26MHz
TCXO block
10MHz
oscillator block
External
interface
block
VCC_XO
IRXD
IEPPS
VCLK
IRST_N
TXD
ALM_N
LOCK
GCLK
RXD
EPPS
RST_N
VANT
RF_COAX
VCC
VBK
VANT
3.3V
RF_PIN
Figure 2-1. GF-8801/02/03 block diagram