X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
1
1
-
-
4
4
R
R
E
E
V
V
E
E
1-12 POWER INPUT SPECIFICATIONS
AC Power: 95-260 VAC, 47 to 440 Hz, < 15 W
DC Power: 120-370 VDC, < 15 W
1-13 BATTERY SPECIFICATIONS
The battery provides standby power to the XL-DC memory.
Battery type: Lithium, 3.5 Volt
Battery life: 15000 hours with power off.
Shelf life 10 years when powered (or GPS-XL JP1 removed)
Part number 350-019 is the lithium battery. "CAUTION: DANGER OF EXPLOSION IF BATTERY IS
INCORRECTLY REPLACED. REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE
BATTERY, AS RECOMMENDED BY THE MANUFACTURER."
If the battery is replaced, it must be disposed of or recycled in accordance with all local, state, and
federal laws. Batteries may be returned to TrueTime, Inc. for disposal.
1-14 TIMING/FREQUENCY PERFORMANCE SPECIFICATIONS
All performance specifications are valid when the antenna's geodetic position is known within 10 m in
WGS-84 and four or more satellites are being tracked under the current conditions of Selective
Availability (SA) as experienced at product release in March of 1994. When operating with the
standard TCXO as internal oscillator, all covers must be in place in order to meet the stated
stability specifications. During periods without SA, timing performance is improved to the ±100 ns
level.
The GPS-XL core receiver specifications are:
Frequency: 1575.42 MHz (L1 signal).
Code: Coarse Acquisition (C/A) code.
Tracking: Up to six satellites.
Acquisition Time: Less than 2 min if satellites visible, position correct within 1 km. Position errors
greater than 100 km may require 15 min or longer, with satellites visible. See
Section III.
Single Fix Within 25 m (SEP) referred to WGS84 when sequentially tracking four (4) or
Position Accuracy: more satellites with a PDOP < 6; 100 m (2 dRMS) if SA is enabled.
24 Hour Averaged
Position Accuracy: < 10 m
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