Chapter 7 117
Technical Characteristics
Noise floor
• N8241A < -150 dBc/Hz across the channel bandwidth
• N8242A < -150 dBc/Hz across the channel bandwidth
Sample clock
• Internal: Fixed 1.25 GS/s
• Internal clock output: +3 dBm nominal into 50 ohm load
• External clock input: Tuneable 100 MS/s to 1.25 GS/s
• External clock input (power): -15 to +5 dBm, 0 dBm nominal
Phase Noise Characteristics
• 1 kHz -95 dBc/Hz
• 10 kHz-115 dBc/Hz
• 100 kHz-138 dBc/Hz
• 1 MHz-150 dBc/Hz
• Noise Floor-150 dBc/Hz
Accuracy: Same as 10 MHz timebase input
10 MHz REF IN
• Input drive level: –5 to +10 dBm into 50 ohms (nominal)
10 MHz REF OUT
• Output drive AC-coupled: 50 ohms (+5 dBm nominal)
AUX 10 MHz Frequency reference in
• Input drive level: +2 to +12 dBm into 50 ohms (+2 dBm nominal)
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