NF WAVE FACTORY WF1967, Instruction Manual (Operations, Page: 314 / 330

17.13 2-Channel Coordination (WF1968 only)
WF1967/WF1968 17-24
Constant
frequency ratio
Keep the ratio of frequency constant. Oscillation in the same oscillation
mode (the same modulation type for modulation oscillation and the same
sweep type for sweep oscillation).
Apply to the standard waveform except for noise and DC, and arbitrary
waveform.
Keep the same frequency ratio also for frequency sweep, internal frequency
modulation, and internal FSK.
External frequency modulation and external FSK are not allowed.
Burst and gated single sweep are not allowed.
Differential
output
Same frequency, amplitude, and DC offset. Reverse phase waveform.
Oscillates on the same oscillation mode (for modulation oscillation,
modulation type is also same. For sweep oscillation, sweep type is also
same).
Apply to the standard waveform and arbitrary waveform.
Keep the different output, even for each type of sweep and internal
modulation.
External modulation is not allowed.
Burst and gated single sweep are not allowed.
External addition is not allowed.
Differential
output2
Same as differential output but DC is reversed polarity.
When the hot sides of CH1 and CH2 are used as the output, including DC, it
is possible to obtain the double amount of output voltage (however, the
output impedance is 100Ω).
Equivalence setting and equivalence operation functions
Yes
Frequency difference setting range 0.00µHz to less than 200MHz
Resolution: 0.01µHz
CH2 frequency - CH1 frequency
Frequency ratio N:M setting range 1 to 9,999,999 (for both N and M)
N:M = CH2 frequency:CH1 frequency
Frequency resolution is limited to N×0.01µHz for CH1,
M×0.01µHz for CH2 (also for frequency sweep, internal
FM and internal FSK)
Phase synchronization operation Auto executed when the channel mode is changed
Time difference between channels for 2-phase
±10ns or less typ., ±20ns or less
*1
Conditions: Continuous oscillation, same waveform (sine
wave or square wave), load 50Ω, DC offset
setting 0V, amplitude setting 10Vp-
p/50Ω
Limitations See (17.9) for parallel use with the synclator function