Synchronising Generators; Synchronising Principles - Metrix GX1010 Notice De Fonctionnement

4.9.2.1. Cursor Style
The edit cursor style can be selected with the cursor in the CURSOR CHAR field. The
default style is to alternate between the screen character and underline [-]; the alternatives
are a solid rectangle, an open rectangle and a blank. Use the rotary control to select the
required style.
4.9.2.2. Rotary Control
The default condition for the rotary control is UNLOCKED, i.e. active. Set the DIAL field to
LOCKED using the DIGIT keys to make the rotary control inactive.
4.9.2.3. Power Up Setting
With the cursor in the POWER UP field the setting can be changed from POWER UP =
DEFAULTS (the default setting) to POWER UP = POWER DOWN (i.e. settings at power
down are restored at power up) or POWER UP = any of the settings stored in non-volatile
memories 1 to 9. POWER UP = DEFAULTS restores the factory default settings, see
Appendix 2.
4.9.2.4. Clock In/Out Setting
The function of the rear panel CLOCK IN/OUT socket is determined by the setting in the
CLOCK BNC field.
With CLOCK BNC = OUTPUT (the default setting) a buffered version of the internal clock
is made available at the CLOCK IN/OUT socket. When two or more generators are
synchronised the 'master' is set to OUTPUT and the signal is used to drive the CLOCK
IN/OUT of 'slaves'.
With CLOCK BNC = INPUT the socket becomes an input for an external clock.
With CLOCK BNC = PHASE LOCK the generator is in 'slave' mode and CLOCK IN/OUT
socket must be driven by a 'master' generator set to CLOCK BNC=OUTPUT.
Because setting 'slave' mode cancels any gate, trigger, sweep or FSK mode currently
running, a warning message is shown when this option is selected and it is necessary to
press CONFIRM to execute; pressing ESCAPE will return the setting to INPUT or
OUTPUT.
Further details are given in the Synchronising Generators section.

4.10. Synchronising Generators

Two or more generators can be synchronised together following the procedure outlined
below; the number of generators that can be linked in this way will depend on the clocking
arrangement, cable lengths, etc., but problems should not be experienced with up to 4
generators.

4.10.1. Synchronising Principles

Frequency locking is achieved by using the clock output from the 'master' generator to
drive the clock inputs of 'slaves'. The additional connection of an initialising SYNC signal
permits each slave to be synchronised such that the phase relationship between master
and slave outputs is that specified on each slave generator's Trigger menu.
Synchronisation is only possible between generators when the ratio of the master and
slave frequencies is rational, e.g. 3kHz can be synchronised with 2kHz but not with 7kHz.
The most practical use of synchronisation will be to provide outputs at the same frequency,
or maybe harmonics, but with phase differences.
GX1010 II - 35