Giga-tronics 2400/2500 Microwave Synthesizer Series
4. Programming Interfaces
Programming Manual, Part Number 34783, Rev A, July 2009
139
4.7.5 HP 8370 Emulation Commands
The HP8370 command set is made up of the standard SCPI commands with the additional commands
listed in Table 31 In standard SCPI, all queries are terminated with a <CR> <LF> whereas in HP8370
emulation mode, only a <LF> is used. Also, standard SCPI requires an EOI as a terminator for GPIB
communication; in HP8370 emulation, a <CR>, a <LF>, or a <CR><LF> is acceptable in place of an EOI. In
HP8370 emulation mode, the front panel display will show the current menu and data values as remote
commands are received. The *IDN? will return “HEWLETT-PACKARD,8370”.
Default differences in this mode are:
PM Start Trigger: BNC connector
PM Stop Trigger: BNC connector
PM Polarity: Active High
CW Frequency: 3 GHz
CW Power: Min Power
FM impedance: 600 Ohms
AM impedance: 5 k Ohms
Table 31 Hewlett Packard 8370 Command Set
Command
Description
TRIGger[:STARt]:SOURce IMMediate|BUS|EXTernal
Selects the trigger source for List
mode. The sources are:
BUS: sets to GPIB/GET
EXT: sets to BNC (Trigger commands
do not function when in EXT)
(IMM only for 83732 mode)
TRIGger[:STARt]:SOURce?
Queries the trigger source for List
mode
TRIGger:STOP:SOURce IMMediate|BUS|EXTernal
Sets the stop trigger source.
TRIGger:STOP:SOURce?
Queries the stop trigger source.