Wavetek 39A Maintenance Manual page 8

Hold
Holds an arbitrary waveform at its current position. A TTL low level or switch closure causes the
waveform to stop at the current position and wait until a TTL high level or switch opening which
allows the waveform to continue. The front panel MAN HOLD key or remote command may also
be used to control the Hold function. While held the front panel MAN TRIG key or remote
command may be used to return the waveform to the start. The Hold input may be enabled
independently for each channel.
Input Impedance:
Ref Clock In/Out
Set to Input:
Set to Output:
Set to Phase Lock:
INTER-CHANNEL OPERATION
Inter-channel Modulation:
The waveform from any channel may be used to Amplitude Modulate (AM) or Suppressed Carrier
Modulate (SCM) the next channel. Alternatively any number of channels may be Modulated (AM
or SCM) with the signal at the MODULATION input socket.
Carrier frequency:
Carrier waveforms:
Modulation Types:
AM:
SCM:
Modulation source:
Frequency Range:
Internal AM:
Depth:
Resolution:
Carrier Suppression
(SCM):
External Modulation
Signal Range:
SCM:
10kΩ
Input for an external 10MHz reference clock. TTL/CMOS threshold
level.
Buffered version of the internal 10MHz clock. Output levels nominally
1V and 4V from 50Ω.
Used together with SYNC OUT on a master and TRIG IN on a slave to
synchronise (phase lock) two separate generators.
Entire range for selected waveform.
All standard and arbitrary waveforms.
Double sideband with carrier.
Double sideband suppressed carrier.
Internal from the previous channel.
External from Modulation input socket.
The external modulation signal may be applied to any number of
channels simultaneously.
DC to >100 kHz.
0% to 105%
1%.
> −40dB.
VCA: Approximately 1V pk−pk for 100% level change at maximum
output.
Approximately ± 1Vpk for maximum output.
7