NF WF1973 - Load Impedance Setting; Waveform Output; Sync;Sub Output; Signal Characteristics

7.5 Signal Characteristics
131
WF1973/WF1974
Accuracy
*1
±( | 1% of DC offset setting [V] | +5mV
+ 0.5% of amplitude setting [Vp-p])/open
Condition: Sine wave output of 10 MHz or lower, 20°C
to 30°C
Outside 20°C to 30°C temperature range,
1 mV/°C typ. is added
7.4.3 Load impedance setting
Functions Setting and display of the amplitude and DC offset for
the output termination voltage under the specified load
condition.
Setting range 1 Ω to 10 kΩ (1 Ω resolution), 50 Ω, High-Z (load open)
7.4.4 Waveform output
Output on/off control On, Off (selectable) (When Off, output pin open state)
Output impedance 50 Ω, unbalanced
Short-circuit protection Protection against short circuit to signal GND
Output connector Front panel, BNC receptacle
7.4.5 Sync/sub output
Output signal Reference phase sync, internal modulation sync, burst
sync, sweep sync, sequence step sync, internal
modulation signal, sweep X drive (selectable)
Reference phase sync output Square waveform with 50% duty that rises at zero
waveform phase position of reference phase (DDS oscillation
phase) of waveform output
Output voltage Sync signals: TTL level (low level 0.4 V/open or lower,
high level 2.7 V/open or higher)
Internal modulation signal: −3 V to +3 V/open
Sweep X drive: 0 V to +3 V/open
Output impedance 50 Ω, unbalanced
Load impedance 50 Ω or higher recommended
Output connector Front panel, BNC receptacle
7.5 Signal Characteristics
7.5.1 Sine wave
Amplitude frequency characteristics
*1
100 kHz or lower ±0.1 dB
100 kHz to 5 MHz ±0.15 dB
5 MHz to 20 MHz ±0.3 dB
20 MHz to 30 MHz ±0.5 dB (±0.8 dB at amplitude setting of 2.8 Vp-p/50 Ω
or higher)
Condition: Amplitude setting 50 mVp-p to 10 Vp-p/50
Ω, reference frequency 1 kHz
Total harmonic distortion
*1
10 Hz to 20 kHz 0.2% or less
Condition: Amplitude setting of 0.5 Vp-p to 10 Vp-p/50 Ω