Agilent Technologies 8590 L-Series Especificações descarregar pdf (Página 284)

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284 Chapter6

Troubleshooting the RF Section

6a. 8590L, 8591C, and 8591E

This section describes the RF section troubleshooting process for the 8590L

and 8591E spectrum analyzers and 8591C cable TV analyzers.

Making RF Power-Level Measurements

The power level ranges listed for measurements A through G in

Table 6-1 apply after performing the following steps:

1. Connect the CAL OUT to the RF INPUT using the CAL cable.

Ensure that the CAL OUT amplitude is within speciﬁcation. (Refer to

the calibrator amplitude performance test in the calibration guide.)

2. Perform the frequency and amplitude calibration routines.

3. Press PRESET, then wait for the analyzer to complete the preset routine.

4. Press the following instrument keys:

FREQUENCY, 300, MHz

SPAN

, 0, Hz

Table 6-1 Power Levels at Measurement Points

Measurement Point Measurement

Frequency

Power Level Range *

(dBm)

50 Ω 75 Ω

A 300 MHz −29 to −31 −35 to −37

B 2.1214 GHz −39 to −43 −46 to −49

C 2.1214 GHz −39 to −44 −46 to −50

D 321.4 MHz −42 to −46 −51 to −55

E 2.4214 GHz +6 to +12 Same as 50 Ω

F 2.4214 GHz −10 to −20 Same as 50 Ω

G 1.8 GHz −17 to −23 Same as 50 Ω

* A frequency-selective measuring device, such as another analyzer, is recommended for making these

measurements. Broadband measuring devices, such as power meters, give erroneous results due to the presence

of other, higher-amplitude signals.

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