4
2.1.8 Serial Port
Electrical interface one full duplex serial communication, TTL interface
Protocol message NMEA-0183, version 3.0 optional.
Default NMEA GGA, GSA, GSV, RMC and VTC. 9600 baud rate,
8 bits data, 1 start, 1 stop, no parity.
(GSA & GSV is 3sec output 1msg, option baud rate:
4800,19200, 38400)
2.1.9 Time-1PPS Pulse (optional)
Level TTL
Pulse duration 100ms
Time reference at the pulse positive edge
Measurements Aligned to GPS second, +-1 microsecond
2.1.10 Recommended External Antenna Specification
Gain 20dB (including cable loss)
Noise figure 1.5dB
Current 3 ~ 30mA
Operate Voltage 2.5 ~ 2.8V
2.2. Environmental Characteristics
Operating temperature range -40 deg. C to +80 deg. C
Storage temperature range -55 deg. C to +100 deg .C
2.3. Physical Characteristics
Dimension: ZX4125 1.043”x1.043”x0.11” (26.5x26.5x3.0mm)
ZX4125P-4 1.043”x1.043”x0.34” (26.5x26.5x8.7mm)
(With TH: 4mm patch antenna)
ZX4125P-2 1.043”x1.043”x0.26” (26.5x26.5x6.7mm)
(With TH: 2mm patch antenna)
Weight: ZX4125 3.8g
ZX4125P-4 15g
ZX4125P-2 10.4g
Antenna connector: 1.27 mm pitch 3 pin board to board
Interface connector: 1.27 mm pitch 10 pin / 6 pin board to board
Remarks: Difference between ZX4125 & ZX4125P.
ZX4125: one rf input with antenna detector.
(Use Active antenna only)
ZX4125P: two rf input with auto switch.
(One patch antenna, one external antenna)
