Specifications
2715 Spectrum Analyzer Service Manual 1-5
Table1 -1: CATV Characteristics (Cont.)
Characteristic Description
Carrier Survey Absolute peak amplitude of each visual carrier measured and each associated aural
carrier level measured relative to the measured visual carrier for the selected
channels —characteristics are identical to the frequency (visual and aural) and level
measurements (frequency is counted only if ACCURATE FREQUENCY AND AMPL
is on)
Accurate Frequency and
Amplitude
Visual carrier frequency measurement
Visual-to-aural carrier frequency measurement
Visual carrier peakl evel measurement
Visual-to-aural carrierl evel differencem easurement
Accurate Amplitude Only Visual carrier peak level measurement
Visual-to-aural carrierl evel differencem easurement
Fast AmplitudeOnly Carrier amplitudes are measured using marker values in 10 dB/div vertical scale
Visual Carrier
Amplitude Range --18 dBmV to +58.8 dBmV5for C/N ≤30 dB (300 kHz RBW)
Frequency Range 15 MHz t o 1015 MHz
Resolution 0.3 dB
Absolute Accuracy ±2.7dB for vi sual C/N ≥30 dB (300 kHz RBW) and for FM signal C/N ≥33 dB (100
kHz RBW) assumes flatness corrections are present
Relative Accuracy ±0.8 dB relative to adj acent channel
±1.5 dB relative to all other channels
Aural Carrier
Difference Range 0to30dBforC/N≥15dB (300 kHz RBW)
Resolution 0.3 dB
Accuracy ±1.1 dB for C/N ≥15 dB (300 kHz RBW)
Aural <FM> Deviation (Typical) Peak FM deviation measured for the selected channel
Range 10 kHz to 50 kHz, usable to 80 kHz
Accuracy ±4 kHz
Cross Modulation (Typical) The third order distortion at the horizontal sync frequency (AM) measured on the
unmodulated visual carrier, as corrected to the NCTArecommended synchronous
square wave modulation procedure
Range 48 dB
Resolution 0.1 dB
Accuracy ±2 dB for cross modulation <36 dB
±3 dB for cross modulation <48 dB
Listen (Typical) The aural carrier for the selected channel is demodulated
Output Speaker or headphones with volume control
Demodulation Type FM
Sweep Displays instantaneous peak FM deviati on
5Totalinput power (all signals included) cannot exceed +70 dBmV.