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1-2
2715 Spectrum Analyzer Service Manual
Table 1- 1: CATV Characteristics
Characteristic Description
Input Configuration
All except Option 50 75 Ω Female F connector
Option 50 50 Ω Type N connector
Channel Selection The visual and aural carriers are displayed when the channel number is entered, or
either [ y ] or [ b ] next to [CHAN/FREQ] is pressed
Tune Configuration STD (73.603), HRC (73.605), IRC (73.612), and Custom
1
Channel Range 0to999
1
Frequency Range
(except Opt 50 and Opt 75)
1MHzto1.8GHz
2
, Preamp limited to 600 MHz
Frequency Range
(Opt 50 and Opt 75)
1 MHz to 2.15 GHz
2
, Preamp limited to 600 MHz
Visual Carrier Frequency
Measurement
Accuracy is dependent on the accuracy of the spectrum analyzer — see Frequency
Accuracy in Table 1--2.
Method Internal Counter
Resolution 1Hz
Accuracy 5 × 10
-7
× Carrier Frequency ±10 Hz, ±1 Least Significant Digit
@ 55.25 MHz (Ch 2) worst case is ±38 Hz
@ 325.25 MHz (Ch 41) worst case is ±173 Hz
@ 643.25 MHz (Ch 94) worst case is ±332 Hz
Visual-to-Aural Carrier Frequency Measurement Aural carrier measured relative t o the visual carrier
Method Internal Counter
Difference Range 1 MHz to 10 MHz
3
for an amplitude difference of ≤30 dB and aural C/N ≥15 dB
(300 kHz RBW)
Resolution 1Hz
Accuracy ±15 Hz for visual-to-aural carrier difference ≤8MHz
Visual Carrier Peak Level Measurement Absolute peak amplitude of visual carrier measured with PREAMP OFF
Accurate Frequency and
Amplitude
Visual carrier frequency measurement
Visual-to-aural carrier frequency measurement
Visual carrier peak level measurement
Visual-to-aural carrier level difference measurement
Accurate Amplitude Only Visual carrier peak level measurement
Visual-to-aural carrier level difference measurement
Fast Amplitude Only Carrier amplitudes are measured using marker values in 10 dB/div vertical scale
Amplitude Range --18 dBmV to +58.8 dBmV
4
for visual C/N ≥30 dB (300 kHz RBW )
1
Configured using Cable TV RF Measurements Software.
2
Dependent on selected channel table. Frequencies above 1.8 GHz are not supported by the Cable TV RF Measurements
Software.
3
Dependent on selected channel table.
4
Total input power (all signals included) cannot exceed +70 dBmV.