Wavetek 39A Maintenance Manual page 9

Inter-channel Analog Summing:
Waveform Summing sums the waveform from any channel into the next channel.
Alternatively any number of channels may be summed with the signal at the SUM input socket.
Carrier frequency:
Carrier waveforms:
Sum source:
Frequency Range:
External Signal Range:
Inter-channel Phase locking:
Two or more channels may be phase locked together. Each locked channel may be assigned a
phase angle relative to the other locked channels. Arbitrary waveforms and waveform sequences
may be phase locked but certain constraints apply to waveform lengths and clock frequency
ratios. With one channel assigned as the Master and other channels as Slaves a frequency
change on the master will be repeated on each slave thus allowing multi−phase waveforms at the
same frequency to be easily generated.
DDS waveforms are those with 7 digits of frequency setting resolution, while Non−DDS
waveforms have 4 digits
Phase Resolution:
DDS waveforms:
Non−DDS waveforms:
Phase Error:
All waveforms:
The signals from the REF IN/OUT socket and the SYNC OUT socket can be used to phase lock
two instruments where more than 4 channels are required.
Inter-channel Triggering:
Any channel can be triggered by the previous or next channel.
The previous/next connections can be used to 'daisy chain' a trigger signal from a 'start' channel,
through a number of channels in the 'chain' to an 'end' channel. Each channel receives the trigger
out signal from the previous (or next) channel, and drives its selected trigger out to the next (or
previous) channel. The 'end' channel trigger out can be set up to drive the 'start' channel, closing
the loop.
In this way, complex and versatile inter−channel trigger schemes may be set up. Each channel
can have its trigger out and its output waveform set up independently. Trigger out may be
selected from Waveform End, Position Markers, Sequence Sync or Burst Done.
Using the scheme above it is possible to create a sequence of up to 64 waveform segments,
each channel producing up to 16 segments and all channels being summed to produce the
complete waveform at the output of channel 4.
INTERFACES
Full remote control facilities are available through the RS232 or GPIB interfaces.
RS232:
IEEE−488:
8
Entire range for selected waveform.
All standard and arbitrary waveforms.
Internal from the previous channel.
External from SUM IN socket.
DC to >8MHz.
Approximately 5Vpk−pk input for 20Vpk−pk output.
0.1 degree
0.1 degree or 360 degrees/number of points whichever is the greater.
<±10ns
Variable Baud rate, 9600 Baud maximum. 9−pin D−connector.
Conforms with IEEE488.1 and IEEE488.2