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1-6
2715 Spectrum Analyzer Service Manual
Table 1- 1: CATV Characteristics (Cont.)
Characteristic Description
View Picture (Typical) The visual carrier, NTSC or PAL format depending on the selected channel, is
demodulated
View Modulation (Field) (Typical) One video field of the selected channel video is displayed
View Modulation (Line) (Typical) The VITS line is displayed — if no VITS line is specified in the channel table, line 17
is displayed
TV Line Selection Selectable using the FREQ/MKRS knob during View Line Modulation functi on
Line Format NTSC or PAL
Line Range 1 to 525 (NTSC), 1 to 625 (PAL)
Sweep Time 10 s/div
In-Channel Response
Range ±3 dB (the auto test is run in 1 dB/div)
Resolution 0.1 dB
Accuracy ±0.5 dB, Auto mode
±0.8 dB, Interactive mode
Adjacent Channel Leakage (Typical) Averaged power in adjacent channel(s) is divided by averaged power for the test
channel
Resolution 0.1 dB
Accuracy ±2.0 dB within limits shown in Figure 1--5 on page 1--9
In-Service In-Channel Response (Typical) Standard vertical interval test signal (line sweep, ghost-canceller, multiburst) is
measured within gate which excludes act ive video; result is expressed as dB P-P
Resolution 0.2 dB
Accuracy ± 0.5 dB assuming test signal is flat at head end