THORLABS MC1000A, Руководство по эксплуатации

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Section 7: Description
7.1 Controller Front Panel Features
REF OUTPUT
0 - 5V
0 - 5V
POWER
FREQUENCY (Hz)
EXT REF INPUT
OPTICAL CHOPPER
SET
N
SET
D
RECALL
SETUP
SAVE
SETUP
REF
SELECT
MODE
EXT IN
ENABLE
CYCLE ENTER
14
13
1 2 3 4
5
6
7 8 9 10
11 12
Figure 1 – MC1000A Front Panel
Feature: Description
1 FREQ DOWN / ENTER Key - This key is used to decrease the chopping frequency when operating
in the internal reference mode. It is also used for as an enter key when setting the various operating
parameters.
2 4-Digit LED Display (to display operating frequency and user messages)
3 EXT IN ENABLE Key - Pressing this key toggles the MC1000 between the internal and external
reference mode.
4 EXT IN LED – This LED will illuminate when the External Input is enabled.
5 EXT REF IN - the external reference signal is connected to this input BNC (TTL / CMOS logic level).
6 REF OUTPUT - the reference output signal selected by the REF SELECT mode (CMOS logic level).
7 SAVE SETUP - When this LED is lit, the user can save the current configuration to one of five setups.
Use the FREQ UP / CYCLE key to select the setup number and press the FREQ DOWN / ENTER to
save the setup to that number. Note: the setup number will wrap around back to 1 after it reaches 5
when pressing the FREQ UP / CYCLE key.
8 RECALL SETUP - In this mode, the user can recall one of the five user setups. Select the setup
number with the FREQ UP / CYCLE key and press the FREQ DOWN / ENTER to restore the saved
configuration.
9 SET D - This mode allows the user to select a sub-harmonic of the external reference input. The
external reference frequency will be divided by this value and used to synchronize the chopper blade.
The sub-harmonic can be used with the harmonic multiplier, N, to create fractional harmonics (i.e.
chopper frequency, f
chopper
= REF
EXT
* N / D).
Note: The Harmonic, N, and sub-harmonic, D, are only available when using the external reference
input and a single frequency chopping blade (i.e. 10, 15, or 30 slot blade).
10 SET N - This mode allows the user to select a harmonic of the external reference input. The external
reference frequency will be multiplied by this value and used to synchronize the chopper blade. The
harmonic multiplier can be used with the sub-harmonic divider, D, to create fractional harmonics (i.e.
chopper frequency, f
chopper
= REF
EXT
* N / D).
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Doc 12536-D03 Rev D 9/19/2005
Page 11 of 22