Tektronix Tektronix SPG8000, Technical Reference

Page: 89 / 118

Performance veri fi cation
Test record Photocopy this table and use it to record the performance test results.
Table 36: Option GPS test record
Instrument Serial Number:
Temperature:
Date of Calibration: Certi fi cate Number:
RH %:
Technician:
Performance test –Min +Max Measured Value Value
DC antenna output power voltage
0 V
3.3 V
3.3 V 4 V
5 V 5 V 6 V
Antenna current and fault
thresholds
Flashing green (open circuit) Pass Fail
Steady green (nominal load)
Pass Fail
Voltage with nominal load 4.5 V 5 V
Steady red (short circuit) Pass Fail
Lock to GPS or GLONASS signal
from antenna
Signal quality (reference unit)
40 80
Difference in signal quality
between reference unit and
unit under test ≤ 20 units from
reference unit
value
≥ 20 units from
reference unit
value
Frequency accuracy when locked
to GPS or GLONASS
Vector phase change – 38 ° + 38 °
Frame timing accuracy
Timing – 0.185 μ s + 0.185 μ s
Internal frequency
– 2.5 e
–6
+2.5 e
–6
SPG8000 Speci fi cations and Performance Veri fi cation 75