Newport New Focus 3502, Руководство пользователя

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26
Mode Setting F
outer
locked to OUT 1 OUT 2
H/S
(H/S)
˜
F
Sync
(H/S)
˜
F
sync
[H/(7
˜
S)]
˜
F
sync
+/- F
sync
F
outer
– F
inner
F
outer
+ F
inner
Normal F
sync
5
˜
F
sync
F
inner
Table 1: Chopping frequency and outputs vs. mode setting.
For all wheels with a dual slot pattern (except for the 60/2-slot wheel), F
outer
=
7/5·F
inner
. Therefore, F
outer
– F
inner
= 2/7·F
sync
and F
outer
+ F
inner
= 12/7·F
sync
.
When the
Sync
setting is
V
ext
, the reference signals available at
OUT 1
and
OUT 2
are generated with respect to the measured chopping signal F
outer
.
Please see Table 2 on page 29 for a complete reference of output signals
according to
Mode
selection.
To change the
Mode
, push the
Mode
key until the LED under the desired
selection lights up.
Sync In
A TTL signal applied to the
Sync In
input will be used as a frequency and phase
reference in
EXT+
and
EXT-
modes. TTL pulses can be used to trigger the
Chopper Controller as long as they are longer than 1
P
s.
Synth Out
The signal provided by the internal synthesizer is available on this output.
F Outer
The signal from the optical pick-up on the Chopper Head is available on this
output as a TTL signal.
Set Button
The
Set
button selects which instrument parameter you can modify using the
cursor keys. Press
Set
until the LED lights under the desired parameter: FREQ,
PHASE
,
H
,
S
,
RECALL
, or
STORE
. Each of these parameters is described below.
The up arrow and down arrow keys will then change the parameter value. In
some cases, the left arrow and right arrow keys select the significant digit to be
modified.
Set: FREQ
The user may set the internal synthesizer frequency depending on the
Sync
source selected. When
EXT-
,
EXT+
or
V
ext
sync has been selected, the frequency
may range from 4.00 Hz to 99.9 kHz.