ILX Lightwave LDC-3700B Series - Reading the GPIB Address; Changing the GPIB Address; Changing Operation from Local to Remote; Figure 3.2 GPIB Connector Diagram

REMOTE OPERATION
Basic GPIB Concepts
7/01 LDC-3700 Series 39
CHAPTER 3

• SRQ (service request) can be set by any device in the system to request service from the
controller.
• EOI (end or identify) is used by talkers to identify the end of a message.
Figure 3.2 GPIB Connector Diagram
Reading the GPIB Address
Before you can operate the LDC−3700B from a remote location, you need to know its GPIB address.
Simply press the LOCAL switch in the section labeled GPIB on the front panel. The instrument will
display the address on the TEC display. The default address from the factory is address "Adr 01".
Changing the GPIB Address
Every device on the GPIB bus must have a unique address. If it is necessary to change the
address, press and hold in the (PARAMETER) SET switch while displaying the GPIB address. Turn
the ADJUST knob until the desired address value is displayed, then release the SET switch. The
new GPIB address will then be stored in non−volatile memory. The allowable address range is 0−30
for primary GPIB addressing. Extended GPIB addressing is not implemented on the LDC−3700B
Series Laser Diode Controller at this time.
Changing Operation from Local to Remote
Sending a command over the GPIB bus automatically puts the instrument in REMOTE mode. The
REMOTE indicator identifies when the controller is in remote operation mode. When the instrument
is in REMOTE mode, pressing the LOCAL switch returns the instrument to LOCAL control mode
unless the Local Lockout state has been activated by the host computer. Local Lockout disables all
LDC−3700B Series Laser Diode Controller front panel switches until this condition is changed by the
host computer. When the instrument is put in Local Lockout Mode by the host computer, the
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
DIO5
DIO6
DIO7
DIO8
REN
GND (Twisted pair with DAV)
GND (Twisted pair with NRFD)
GND (Twisted pair with NDAC)
GND (Twisted pair with IFC)
GND (Twisted pair with SRQ)
GND (Twisted pair with ATN)
SIGNAL GROUND
DIO1
DIO2
DIO3
DIO4
EOI
DAV
NRFD
NDAC
IFC
SRQ
ATN
SHIELD
LOCAL
GPIB
TALK/LISTEN
REM OT
E
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com