Keysight Technologies 8480 Series, Руководство по эксплуатации и обслуживанию

Страница: 19 / 99

Introduction 1
Keysight 8480 Series Operating and Service Manual 19
from the data on the sensor label, should be used for any power measurements in
a 75 ohm system at 50 MHz.
Figure 1-3 Mechanical adapter (8483A Only)
D-model 8480 series sensors (8481D, 8485D, 8485D-033 and 8487D)
D-model sensors are supplied with a 11708A 30 dB attenuator. To calibrate a
D-model sensor, the 1 mW 50 MHz Power Reference supplied by the power meter
must be reduced to 1µW. The reference attenuator provides the means to do this.
CAUTION
Remove the mechanical adapter from the power sensor before connecting
the sensor to a 75 ohm source.
Table 1-2 11708A 30 dB attenuator characteristics
Characteristic Limits Comments
11708A accuracy at
50 MHz, 25 °C
30 ± 0.05 dB
Accuracy traceable to National Institute of
Standards and Technology (NIST), with a
temperature coefficient typically 0.003 dB per °C.
Dimensions Length: 60 mm (2.4 in) Diameter: 20 mm (0.8 in)