Tektronix 77807-1, User Manual

Page: 31 / 132

Operating Basics
2–4
DS1000 Series User Manual
VIDEO O/P. Provides a standard 1 volt video output with nominal
75
W
impedance. The NTSC model has one output and the PAL
models have two identical VIDEO O/P outputs. See Figure 2–2.
4.5 MHz O/P. (NTSC only) Provides a buffered 4.5 MHz audio
subcarrier output with nominal 75
W
impedance.
IF O/P. Provides a buffered IF output of the full video vestigial
side band with all sound carriers (NTSC: 45.75 MHz,
PAL: 38.9 MHz). The nominal impedance is 75
W
. This output is
available for re-modulation or monitoring (75
W
terminated).
RF Input ( ). Provides RF signal input with a sensitivity of –20 to
+30 dBmV and a nominal 75
W
impedance.
AUDIO OUT (L). Provides a BTSC stereo left channel or mono
channel output for NTSC systems. For PAL systems, it provides a
NICAM/FM audio output, left channel or language 1 dual mode.
AUDIO OUT (R). Provides a BTSC stereo right channel or second
audio program (SAP) output for NTSC systems. For PAL systems,
it provides a NICAM/FM audio output, right channel or
language 2 dual mode.
Operating Procedures
This section describes how to correctly apply power to the television
demodulator and how to operate the instrument.
Applying Power
1. Apply an appropriate mains power source to the television
demodulator through the supplied power cord. There is no power
switch.
2. The front panel LCD briefly displays the starting self-test message
before starting the self-tests. Each of the self-tests displays a
different test message. If any of the tests fail, a test failure message
appears and the unit waits for you to press a button before it
continues with the remaining tests.
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