8
Dual-channel Operations
Tracking
Independent (Off):
The channels are independent of each other.
Equal:
The two channels are identical and behave identically.
Inverse:
The two channels are identical except that the output of channel 2 is
inverted. In this mode the two channels can be used together as a
differential signal source.
Coupling
Frequency coupling:
The frequencies of the two channels can be coupled. Changing the
frequency of one channel changes the frequency of the other channel,
either by a fixed ratio or fixed offset.
Waveforms
Sine, Square, Ramp and Arbs can be coupled to
each other. Pulse can only be coupled to Pulse.
Noise and PRBS cannot be frequency coupled.
Type
Ratio
0.001 to 1000, resolution 0.001
Offset +/- 50MHz -1
µ
Hz, resolution 1
µ
Hz
Amplitude (and DC Offset)
coupling:
Amplitude (and DC offset) of the two channels can be coupled.
Changing the amplitude and offset on one channel changes the
amplitude and offset of both channels.
Output coupling:
Output On/Off can be coupled. Switching the output On/Off on one
channel switches the output On/Off of both channels.
Characteristics
Relative phase:
-360 to 360 degrees, 0.1 degree resolution (Phase offset cannot be set
for Pulse, Noise and PRBS waveforms)
Channel to channel
Skew (typical):
Sine – Sine
<1ns
Sine – Square
50% duty cycle
30ns or 0.1% of period
(whichever is greater)
Other duty cycles
30ns or 2% of period
(whichever is greater)
Sine – Ramp/Arb (any
Ramp symmetry)
8ns (worst case)
Square – Square
Same duty cycle
<1ns or 0.1% of period
(whichever is greater)
Different duty cycle
<1ns or 2% of period
(whichever is greater)
Square – Ramp/Arb
(any Ramp symmetry)
50% duty cycle
30ns or 0.1% of
8ns (whichever is greater)
Other duty cycles
30ns or 2% of
8ns (whichever is greater)
Ramp/Arb – Ramp/Arb
(any Ramp symmetry)
8ns (worst case)
Pulse – Pulse
<4ns
PRBS – PRBS
<1ns or 0.1% of bit rate (whichever is greater)
Crosstalk (typical):
<80db
