Tektronix 2715, Руководство пользователя

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Introduction
1–2
2715 User Manual
What Can You Do With a Spectrum Analyzer?
Spectrum analyzers measure how the power in an input signal is distributed in
frequency. You can use spectrum analyzers to determine signal amplitudes and
frequencies, noise power, carrier-to-noise ratios, signal or filter bandwidths,
distortion (harmonic and intermodulation), FM deviation, and percent modula-
tion. Also, you can use spectrum analyzers to detect spurious signals, align
transmitters and receivers, and check specifications.
About the 2715
The Tektronix 2715 Cable TV Spectrum Analyzer is a portable, cable TV, radio
frequency (RF), scanning spectrum analyzer for use in the field or in the shop. It
weighs less than 22 lbs (9.5 kg) and can be equipped with a battery and inverter
for use in locations without AC power.
The user interface is simple enough for the beginner but versatile enough to
satisfy an expert. Fundamental cable TV (CATV) measurement parameters, such
as center frequency, span/division, and reference level, are automatically set
when you select a channel table and channel. In nonCATV mode, measurement
parameters can be controlled directly with dedicated keys. You can display a
spectrum by using only three controls. Call-up menus enable you to automate
operations, such as bandwidth or carrier-to-noise ratio measurements, and to
directly enter front-panel control settings. Measurement parameters and results
are displayed on-screen.
To increase measurement flexibility, the 2715 Cable TV Spectrum Analyzer has
the following standard features:
H
Automated CATV measurements, including in-service measurements of
carrier-to-noise (C/N), composite second order (CSO), and in-channel
response (ICR)
H
Frequency-corrected YIG oscillator for high frequency accuracy; you can
change the default oscillator settling delay time to optimize settling time for
your particular use; the 2715 stores the new value
H
True analog display (in addition to digital storage) with 1
m
s/div sweep speed
that lets you see beats down in the noise
H
Low input signal sensitivity with the built-in preamplifier activated
H
Signals as large as 70 dBmV (+20 dBm) can be accommodated
H
Automatic selection of both sweep speed and resolution bandwidth
H
Digital and time-domain functions
H
AM/FM detection
H
User-definable modes
H
300 Hz to 5 MHz resolution bandwidths