Agilent Technologies E2730A, Инструкция по установке и эксплуатации

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E2730A VXI RF TUNER
OPERATION 3-9
3.4 TUNER OPERATIONS
The following paragraphs describe the word serial commands which are
used to control and query the operational parameters of the E2730A VXI
VHF/UHF Tuner. All commands use IEEE-488.2 ASCII mnemonics and
the command messages consist exclusively of ASCII-encoded data. Refer
to
paragraph 3.3.4 for specific details on communication protocol. The
word serial commands are divided into the following operational
subcategories:
•
Setup Operations
•
Manual Control
•
Memory Operation
•
Communication
•
Error Messages
•
Master/Slave LO’s
•
Compatibility
•
User Configuration
•
Factory Configuration
•
Maintenance
3.4.1 SETUP OPERATIONS
Tuner Setup Operations are global commands that affect the E2730A
regardless of the current operational mode. These commands include
external reference selection, the tuner reset operation, and the clear storage
memory operation. The commands in this message category are described
in the following paragraphs.
REFERENCE SELECTION
The E2730A can have its frequency referenced to one of three sources: an
internal reference oscillator, an external 10 MHz input on the front panel
of the tuner or the VXI 10 MHz bus reference. The tuner always powers
up using the internal reference oscillator. If an external reference is
selected, it must be present (otherwise the tuner LOs will become
unlocked). The commands in this message category are listed in
Table 3-4 .