Connections
Front Panel Connections
MAIN OUT
This is the 50
Ω
output from the main generator. It will provide up to 20V peak-to-peak e.m.f.
which will yield 10V peak-to-peak into a matched 50
Ω
load. It can tolerate a short circuit for 60
seconds.
Do not apply external voltages to this output.
SYNC OUT
This is a TTL/CMOS level output which may be set to any of the following signals from the SYNC
OUTPUT SET-UP screen.
WAVEFORM SYNC
A sync marker phase coincident with the MAIN OUT waveform. For
standard waveforms, (sine, cosine, haversines, square, triangle, sinx/x
and ramp), the sync marker is a squarewave with a 1:1 duty cycle with
the rising edge at the 0º phase point and the falling edge at the 180º
phase point. For arbitrary waveforms the sync marker is a positive
pulse coincident with the first few points (addresses) of the waveform.
In a sequence each waveform in the sequence generates its own sync
marker.
POS’N MARKER
When position (pos’n) marker is selected, the instrument generates a
pulse marker pattern for arbitrary waveforms. The pulse pattern is
programmable from the “edit waveform”
menu on the MODIFY
screen.
BURST DONE
Provides a signal during Gate or Trigger modes which is low while the
waveform is active at the main output and high at all other times.
SEQUENCE SYNC
Provides a signal which is low during the last cycle of the last
waveform in a sequence and high at all other times.
TRIGGER
Provides a positive going version of the actual trigger signal; internal,
external, manual and remote all produce a trigger sync.
SWEEP SYNC
Goes high at the start of the sweep and low at the end of the sweep.
PHASE LOCK
Produces a positive edge coincident with the start of the current
waveform; this is used for phase locking instruments. This waveform
may not appear coherent.
SYNC OUT logic levels are nominally 0V and 5V from typically 50
Ω.
SYNC OUT will withstand a
short circuit.
Do not apply external voltage to this output.
TRIG IN
This is the external input for Trigger, Gate, Sweep and Sequence operations. It is also the input
used to synchronise the generator (as a slave) to another (which is the master).
Do not apply external voltages exceeding ±10V.
14