Trimble Outdoors Acutime 2000 Users Manual 11820_Acutime2000_PDF_DS

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Page 1

Acutime 2000
GPS Smart Antenna for Precise Timing and Synchronization

Key Features
• Timing pulse synchronized to within ±100
nanoseconds (one
sigma) of UTC
• Operating temp -40° to
+85° C
• Option of RS-422/485
or RS-232 interface

Trimble

• Standard 8-channel or
premium 12-channel
option

Trimble’s new Acutime™ 2000
GPS smart antenna marks the
integration of the latest GPS
technology into a rugged selfcontained unit that enables easy
integration into any system.
The Acutime 2000 is a polemounted GPS receiver and
antenna in an environmentally
sealed enclosure. The Acutime
2000’s design continues
Trimble’s line of GPS smart
antennas, which have been in
production since 1991. It is the
perfect solution for precise timing and synchronization of
wireless voice and data networks
and provides a cost-effective and
independent timing source for
any application.
Once power is applied, the
Acutime 2000 automatically
tracks satellites and surveys its
position to within meters. It
then switches to overdetermined
time mode and generates a
pulse-per-second (PPS) output
synchronized to UTC within
±100 nanoseconds (one sigma),
outputting a time tag for each
pulse. The Acutime 2000’s
T-RAIM (Time-Receiver
Autonomous Integrity Monitor)
algorithm ensures PPS integrity.
Designed for long-term
reliability, the Acutime 2000
GPS smart antenna is waterresistant and weatherproof, and
has a rounded top that facilitates run-off from the elements.

The Acutime 2000 is the premier time source for synchronization of wireless voice
and data networks.

OPTIONS

GETTING STARTED

The Acutime 2000 is available
in a number of configurations
to suit all environments. The
standard Acutime 2000 is an
8-channel receiver; a premium
12-channel option is also
available. The interface is
available in either an
RS-422/485 (for long cable
runs required by buildings
or towers) or an RS-232.

The Acutime 2000’s Starter
Kit makes it easy to evaluate
the exceptional performance
of this GPS smart antenna and
integrate state-of-the-art
technology into your system.
The Starter Kit includes the
Acutime 2000 smart antenna,
a 100' interface cable, user
guide, RS-422 to RS-232
converter, and a Windows
software tool for monitoring
and communication.

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Page 2

Acutime 2000
GPS Antenna for Precise Timing and Synchronization
External Event Capture

PHYSICAL CHARACTERISTICS
Dimensions:
Weight:
Connector:
Mounting:

Interface:

6.12" D, 5.0" H (155.5mm x 127.0mm)
12.8 oz (363 g)
12-pin round, waterproof
1"-14 straight thread

Resolution:
Minimum Pulse Width:
Reporting Mechanism:

RS-422/485 or RS-232
320 nanoseconds
1 microsecond, rising edge on-time
TSIP Packet

ELECTRICAL SPECIFICATIONS

Mechanical Drawing:

Prime Power:
Power Consumption:

5.0" (127.0 mm)

+8 Vdc to +36 Vdc, reverse polarity protection
110mA @ 12 volts, 1.2 watts (typical), <1.5 watts max

SERIAL PROTOCOLS
Interface

RS-422/485 or RS-232
RxB (primary)
RS-422/485 or RS-232
TxA (secondary) RS-422/485 or RS-232
All ports support baud rates of 300–38,400;
TxB (primary)

6.12"
(155.5 mm)
ENVIRONMENTAL SPECIFICATIONS

Protocols

TSIP, NMEA
TSIP, RTCM
TSIP
7 or 8 data bits;

Defaults

TSIP @ 9600, 8-odd-1
TSIP @ 9600, 8-odd-1
TSIP @ 9600, 8-odd-1
even, odd, no parity

ZDA
GGA, GLL, VTG, GSV, GSA, ZDA, RMC

NMEA messages (default):
Operating temp:
Storage temp:
Vibration:

Operating Humidity:
EMC:

–40 to +85° C
–55 to +105° C
0.008 g2/Hz
5 Hz to 20 Hz
0.05 g2/Hz
20 Hz to 100 Hz
–3dB/octave
100 Hz to 900 Hz
95% RH, non-condensing @ 60° C
CE, FCC Class B

Available messages:

ORDERING INFORMATION

Acutime 2000 GPS Smart Antenna
8-channel, RS-422
12-channel, RS-422

PERFORMANCE SPECIFICATIONS
General:

Update Rate:

L1 frequency, C/A code (SPS), continuous tracking
receiver. Available in 8-channel or 12-channel.
1Hz

Accuracy:

Position
Velocity
Time to First Fix
(no stored position):

Time to First PPS
(stationary with stored
position, e.g., recovery
after power outage):
Re-acquisition after
60-second signal loss:

Dynamic SPS (with S/A)

Dynamic DGPS

40m CEP
0.25 m/s CEP

1.5m CEP
0.05 m/s CEP

8-channel typical cold start: < 120 seconds
12-channel typical cold start: < 110 seconds

8-channel, RS-232
12-channel, RS-232
Acutime 2000 Starter Kit
(includes 8-channel RS-422 Acutime 2000,
100' interface cable, RS-422/232 converter,
Acutime Monitor software (Win 9x/2000/NT) User Guide

Acutime 2000 User Guide
Acutime 2000 interface cables
(12 conductors, 6 twisted pairs, shielded)

50'
100'
200'
400'

<60 seconds
<2 seconds (90%)

(15m)
(30m)
(60m)
(120m)

Dynamics:
Velocity:
Acceleration:
Jerk:

500 m/sec maximum
4g (39.2 m/sec2)
20 m/sec3

PPS output

RS-422
10 microseconds (default). User-programmable
from 10 microseconds to 500 milliseconds.
On-Time Edge:
Rising edge on-time (default). User-programmable
rising or falling.
Resolution:
80 nanoseconds (quantization error reported
through TSIP)
Accuracy (one sigma): UTC ±60 nanoseconds (static, without S/A)
UTC ±100 nanoseconds (static)
UTC ±300 nanoseconds (dynamic, TDOP≤3)
Physical Interface:
Width:

Trimble Navigation Limited
Corporate Headquarters
645 North Mary Avenue
Sunnyvale, CA 94086
+1-408-481-8940
+1-408-481-2202 Fax
www.trimble.com

For additional information, please visit Trimble’s website at www.trimble.com
and the Acutime 2000 product page for updates, additional tools and
current part numbers.

Trimble Navigation
Singapore PTE Limited
79 Anson Road
#05-02
Singapore 079906
+65-325-5668
+65-225-9989 Fax

Trimble Navigation Europe Limited
Trimble House
Meridian Office Park
Osborne Way
Hook, Hampshire RG27 9HX U.K.
+44-1256-760-150
+44-1256-760-148 Fax

Trimble Navigation
Australia Pty Ltd.
Level 1/123 Gotha Street
Fortitude Valley, QLD 4006
+61-7-3216-0044
+61-7-3216-0088 Fax

© Copyright 2000, Trimble Navigation Limited. All rights reserved. The Trimble logo with Trimble is a trademark of Trimble Navigation Limited registered in the United States Patent and Trademark Office.
Acutime is a trademark of Trimble Navigation Limited. All other marks are the property of their respective owners. TID11820-PDF (1/00)

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