Garmin 15H-W - GPS Especificações técnicas - Página 12

Procurar online ou descarregar pdf Especificações técnicas para GPS Garmin 15H-W - GPS. Garmin 15H-W - GPS 38 páginas. Garmin gps 15l: technical spec

Imprimir página

GPS 15H & 15L WIRE DESCRIPTIONS AND WIRING DIAGRAMS

The GPS 15H-F & 15L-F use an eight-contact flex circuit LIF (low insertion force) connector. The GPS

15H-W & 15L-W use an eight-pin JST connector (mating wire harness included). See section 1.5.1.3.

2.1 GPS 15H & 15L WIRE DESCRIPTIONS

Pin #

Signal Name

BACKUP

This input provides external power to maintain the real-time clock. This enables

POWER

the user to provide backup power if needed for longer than the on-board backup

battery provides (roughly 21 days). Input voltage must be between +2.8 and +3.4

VDC.

GROUND

Power and Signal Ground

POWER

GPS 15L: +3.3 to +5.4 VDC (±100 mV ripple) input. Peak operating current is

100 mA. Nominal operating current is 85 mA. This voltage drives an LDO with a

nominal 3.0 VDC output.

GPS 15H: Unregulated 8.0 to 40 VDC input. Peak operating current is 40 mA @

12 VDC input. Nominal operating current is 33 mA @ 12 VDC input. This

voltage drives a switching regulator with a nominal 3.3 VDC output. Although a

regulated supply is not required, the peak-to-peak voltage ripple on this line

should be kept to less than 100 mV.

PORT 1

Serial Asynchronous Output

DATA OUT

RS-232 compatible output normally provides serial data which is formatted per

NMEA 0183, Version 2.0. This output is also capable of outputting phase data

information; see

NMEA 0183 baud rate is selectable in the range of 300 to 38400 baud. The default

baud rate is 4800.

PORT 1

First Serial Asynchronous Input

DATA IN

RS-232 compatible with maximum input voltage range of -25 < V < 25. This

input may also be directly connected to standard 3 to 5 VDC CMOS logic that

utilizes RS-232 polarity. The low signal voltage requirement is < 0.6 V, and the

high signal voltage requirement is > 2.4 V. Minimum load impedance is 500 Ω.

This input may be used to receive serial initialization/ configuration data as

specified in section

RF BIAS

This input allows the user to supply an external RF bias voltage in the range of 4

VDC to 8 VDC to the active antenna. The voltage should be from a clean,

regulated supply and should be well isolated from potential sources of

interference. The supply should not share RF current paths with other system

devices such as microprocessors or other RF circuits. By default, the unit uses an

internal voltage to power the active antenna.

Note: This pin is only operational on units whose serial numbers are higher than

the serial numbers given below:

010-00240-01 GPS 15H-W serial no. 81301857

010-00240-02 GPS 15L-W serial no. 81408976

010-00240-11 GPS 15H-F serial no. 81901632

010-00240-12 GPS 15L-F serial no. 82001471

PPS

One-Pulse-Per-Second Output

Typical voltage rise and fall times are 100 ns. Impedance is 250 Ω. The open

circuit output voltage toggles between the low (0 V) and the high (3.3 V for 15H

and 3.0 V for 15L). The default format is a 100 ms wide active-high pulse at a

1 Hz rate, with the pulse width configurable in 20 ms increments. Rising edge is

synchronized to the start of each GPS second. This output provides a nominal 450

mVp-p signal into a 50 Ω load. The pulse time measured at the 50% voltage point

will be approximately 15 ns earlier with a 50 Ω load than with no load.

PORT 2

Second Serial Asynchronous Input

DATA IN

This input may be used to receive serial differential GPS data formatted per

RTCM SC-104 Recommended Standards For Differential Navstar GPS Service,

Version 2.2 (see section

190-00266-01

Appendix B: Binary Phase Output Format

4.1 Received NMEA 0183

4.5

for more details).

Table 2: GPS 15H & 15L Wire Descriptions

GPS 15H & 15L Technical Specifications

Page 8

Description

for details. The

Sentences.

Rev. D