Atec HP-Symmetricom-58503B - Manual (Page 4)

©2002 Symmetricom. Symmetricom and the Symmetricom logo are registered trademarks of Symmetricom, Inc. All specifications
subject to change without notice. DS/58503B/D/0902/PDF
1 PPS Output/1 PP2S Output (Option 002) Specifications
(with SA on)
LOCKED
Jitter of leading edge: < 750 ps rms with at least one satellite in view.
TIME ACCURACY
20ns typical (1 Sigma) SA off with respect to UTC (USNO MC) and all systematic
offsets have been removed, calibrated, and locked to GPS.
UNLOCKED
Accumulated time error: < 8.6 µs accumulated in 24 hours of unlocked operation.
(See Notes 1 and 2.)
SUPPLEMENTAL INFORMATION
• Pulse Width 26 µs
• Amplitude > 2.4 volts into 50 W load. (TTL compatible)
• Connector BNC
• Rise time 40 ns typical
ADDITIONAL FEATURES
ALARM OUTPUT
TTL open collector with internal pull-up resistor. Circuit can sink up to 10 ma.
Provides a logic output to allow monitoring of normal (H) and abnormal (L)
operation externally and remotely. BNC connector.
FRONT PANEL INDICATORS (LEDs)
• Power
• GPS Lock
• Holdover Mode
• Alarm
REMOTE INTERFACE
• RS-232C DTE configuration Complete remote control and interrogation of all
instrument functions and parameters.
• Factory defaults Baud rate 9600, 8 data bits, 1 start bit, 1 stop bit, no parity.
Other settings are programmable.
• Connector 25-pin female rectangular D subminiature on rear panel.
• Time code output is available to a computer immediately preceding the 1 PPS signal
for the current second.
NOTE 1
This specification has a 95% probability, and is based on the availability of four or more
GPS satellites during three days of locked operation with a fixed antenna location. The
temperature must remain within a 10 ºC range between 10 ºC and 40 ºC.
NOTE 2
When a quartz oscillator has not been operated for a period of time, or if it has been
subjected to severe thermal or mechanical shock as might be encountered during
product shipment, the oscillator may take some time to stabilize. In most cases, the
oscillator will drift and then stabilize at or below its specified rate within a few days
after being turned on. In isolated cases, depending upon the amount of time the oscillator
has been off and the environmental conditions it has experienced, the oscillator may
take up to one week to reach its specified aging rate and to operate without significant
frequency “jumps.”
When a Symmetricom GPS receiver is initially turned on and locked to the GPS satellite
system, it will achieve GPS lock within 30 minutes of operation. It has a 95% probability
of meeting unlocked (holdover) specifications after 48 hours of GPS operation, followed
by 24 hours of learning. The longer the GPS receiver (and its quartz oscillator) operates,
the better its stability and unlocked (holdover) performance becomes.
ENVIRONMENTAL SPECIFICATIONS
TIME AND FREQUENCY REFERENCE RECEIVER (58503B)
Operating 0° C to +50° C
Storage -40° C to +80° C
ANTENNA (58532A)
Operating -40° C to +85° C
Storage -45° C to +90° C
Additional Information
POWER REQUIREMENTS
• AC power (standard)
AUTO RANGING
• 100 -127 Vac, nominal
• 220 - 240 Vac, nominal
RANGES
• 90 - 132 Vac
• 198 - 264 Vac
• 47 - 63 Hz
Option AWQ (replaces AC power operation with
DC power operation)
AUTO RANGING
• 24 - 48 Vdc, nominal
RANGE
• 20 - 60 Vdc, greater than +23 Vdc required to start
INPUT POWER (all options)
• < 35 watts (nominal)
DIMENSIONS
• 88.5 mm H x 212.6 mm W x 348.3 mm D
Half-rack module.
SYMMETRICOM, INC.
2300 Orchard Parkway
San Jose, California
95131-1017
tel : 408.433.0910
fax : 408.428.7896
[email protected]
www.symmetricom.com SYMMETRICOM EMEA
150 Wharfedale Road
Winnersh Triangle, Nr. Wokingham
Berkshire
RG41 5RB, United Kingdom
tel : 44.1189.699799
fax : 44.1189.277520
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4th Floor
Sunrise, Florida
33323
tel : 954.331.4592
fax : 954.331.4601
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Unit 1005, Jubilee Centre
42–46 Gloucester Road
Wan Chai
Hong Kong
tel : 852.2529.7180
fax : 852.2529.7190
[email protected]