Technical data

636 Chapter 21
Safety and Regulatory Information and Specifications
E7495A/B Base Station Test Set Specifications
Safety and Regulatory Information
and Specifications
Measurement speed:
Full span:
60 MHz span:
< 17 ms/point
< 7ms/point
Return loss (Port 1):
With ≥ 4 averages and 375 MHz to
2200 MHz
Range:
VSWR:
Resolution:
Display range:
SWR range:
Ε 7495Β > 40 dB, Ε 7495Α> 30 dB
Ε 7495Β < 1.02, Ε7495Α < 1.07
0.1 dB
–5 to +150 dB
1 to 500
Distance to Fault (Port 1):
Range (m):
Resolution:
VSWR:
1 m to 300 m
(1.5 x 10
8
) (Vf)/(f2 - f1) Hz where Vf is relative
propagating velocity of the cable. Typically 1% of
measurement distance
1 to 500
Example table illustrating the effects of data points and span versus measured distance and resolution
(Vf of 93.1%):
Data Points Span Measured distance Resolution
256 140 MHz 127.68 m 50 cm (19.6 inch)
512 140 MHz 255.36 m 50 cm (19.6 inch)
512 280 Mhz 127.68 m 25 cm (9.8 inch)
1024 560 MHz 127.68 m 12.5 cm (4.9 inch)
Table 1 E7495A/B Base Station Test Set General Specifications