Atec Agilent-8757D - Manual (Page 4)

4
GPIB
Interface
GPIB operates according to IEEE 488-1978 and
IEC-625 interface standards.
Interface function codes
SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP0, DC1,
DT0, C0, E1.
Transfer formats
Data can be transferred either as ASCII strings
or as 16-bit integers. Readings may be taken at a
single point, or an entire trace may be transferred
at once.
Transfer speed
ASCII format, 401 point trace:
500 ms typical
ASCII format, single point: 10 ms typical
Binary format, 401 point trace: 30 ms typical
Binary format, single point:
7 ms typical
Programmable functions
All front panel functions except power on/off
are programmable. The 8757D is compatible with
all appropriate 8757A/C scalar analyzer program-
ming codes.
User-accessible display graphics
HPGL subset that allows user to display test
setup diagrams and operator instructions on the
analyzer CRT/LCD.
Interrupts
GPIB service interrupts (SRQs) are generated for
the following conditions:
• Front-panel key pressed
• Operation complete
• Illegal command
• Instrument self-test error
• Limit test failed
System interface
The Agilent 8757 system interface is a dedicated
GPIB port used exclusively by the 8757 to control
and extract information from a swept source, a
digital plotter, and a printer.
Compatible swept sources
The following swept sources are specifically made
to complement the 8757 system. With them, the
8757 is able to display start, stop, and marker fre-
quencies, save and recall front panel states of both
the sweeper and the scalar analyzer, preset both
instruments simultaneously, and alternately sweep
two different frequency or power ranges and dis-
play both simultaneously:
• Agilent PSG 1 signal generators (Option 007)
• Agilent 8360 series synthesized sweeper
• Agilent 8370 series synthesized sweeper
Printers
For a list of compatible printers, consult our
printer-compatibility guide Web page. Its URL
location is http://www.agilent.com/find/pcg. Or go
to www.agilent.com and use keyword search
printer guide.
Internal plotter/printer buffer
The GPIB buffer speeds measurements by return-
ing the control to the analyzer while outputting
data to a plotter or printer. Output two channels
(401 points each) of information to the buffer in
typically less than 5 seconds.
Note: In order to use the currently available printers a GP-IB
to parallel port adapter is needed. Adapters are available
from Intelligent Interfaces. Please see their website at
http://www.intelligentinterfaces.com.
Disk interface
The 8757D provides the capability to store and
retrieve the analyzer’s instrument state, measure-
ment data, and user accessible display graphics
to and from an external GPIB disk drive that is
compatible with command subset CS/80. Data files
are stored in Agilent’s standard LIF format and
can be read by a wide variety of computers, includ-
ing the HP 9000 series 200 or 300. Files can be
stored in binary or ASCII format.
Disk drive
Agilent no longer offers Option 802, the HP 9122C
disk drive. Agilent 8757D-compatible disk drives
are available from ISA, Inc. In the U.S., contact
Saaya, Inc. (formerly known as ISA, Inc.).
Elsewhere, contact ISA Company, Ltd. at
http://www.isa-j.co.jp/.
Agilent 8757D scalar network analyzer, continued
1 URL location: http://www.agilent.com/find/psg