Tektronix SPG8000 Technical Reference page 32

Specifications
Table 27: GPS timebase (cont.)
Characteristic
Time to acquire satellites and
achieve specified stability (typical)
Definition of Lock Status Figure of
Merit
(GPS mode only)
1
Instruments with earlier Option GPS modules can receive only GPS signals. Instruments with later Option GPS modules can receive both GPS and GLONASS
signals. (See page 76, How to determine which GPS receiver is installed in your instrument.)
18
Performance requirements
2 Minutes on boot up with warm oven, good
satellite signal, and known position.
0 No signal
1 Low signal
2 Acquire Satellites
3 Bad Position
4 Acquire Position
5 Adjust Phase
6 Locked > Signal Quality ≤16
7 Locked >> Signal Quality > 16
8 Locked >>> Signal Quality > 26
9 Locked >>>> Signal Quality > 42
10 Locked >>>>> Signal Quality >68
11 Locked >>>>>> Signal Quality > 110
Reference information
Frames may jump on initial lock to establish
correct relative positions.
Note that the receiver may take a few
minutes to detect and display the signal.
SPG8000 Specifications and Performance Verification