Boonton 4500B Peak Power Meter - Manual (Page 201)

Boonton 4500B RF Peak Power Analyzer
Remote Operation 5-1
5. Remote Operation
5.1 GPIB CONFIGURATION
The 4500B GPIB interface is configured using the Util > Remote > GPIB > Bus Setup menu. The primary listen/talk address
(MLTA) under menu item Util > Remote > GPIB > Bus Setup > Address can be set to any value from 1 to 30 inclusive. The
value assigned must be unique to each GPIB device. Secondary address is not implemented.
The Listen string terminator character (EOS) can be set under menu item Util > Remote > GPIB > Bus Setup > Listen Term
to ASCII character LF ( decimal 10), CR (decimal 13) or EOI Only. ―EOI only‖ is the default. The 4500B always responds to
the GPIB ―end‖ signal (EOI), which may be sent by the controller with the last character of the command string or with the
EOS character. If the controller does not, or cannot send the EOI signal, a mutually agreed upon EOS character must be
used.
The Talk string terminator character (EOS) can be set under menu item Util > Remote > GPIB > Bus Setup > Talk Term to
ASCII character LF ( decimal 10), CR (decimal 13), the two character sequence CRLF or EOI only. ―EOI only‖ is the
default. The 4500B always sends the GPIB ―end‖ signal (EOI) with the last character of every string. If a one or two
character EOS is selected, the EOI signal will be sent with the last EOS character. If ―EOI only‖ is selected, the EOI signal
will be sent with the last character of the string.
In a new setup try the 4500B default settings ―EOI only‖ for both Listen and Talk. If this does not work, the controller‘s
requirements will have to be satisfied for communications to take place.
At menu item Util > Remote > GPIB > Set Mask, the bus service request enable byte mask value can be set. If the value is
zero, SRQ is disabled.
The menu report item Util > Remote > GPIB > View Buffers alternately displays the current contents of the Listen and Talk
internal buffers. Press the > View Buffers menu key to switch between Listen and Talk buffers. This feature is very useful for
analyzing bus communication problems. The buffers show what has been received from the controller and what has been sent
to the controller.
5.2 4500A EMULATION MODE
The 4500B provides a 4500A Emulation Mode for compatibility with programs written for models 4400, 4500, 4400A,
4500A, 4400A-L and 4500A-L. The emulation mode does not provide access to new features of the 4500B that were not
available in the 4500A. To take full advantage of the 4500B‘s capabilities, the SCPI Language must be used. It is strongly
recommended that you use SCPI for all new programs. To select the 4500A Emulation mode, set the Util > Remote > GPIB
> Emulate 4500A menu selection to ―On‖. The emulation mode selection is non-volatile so that the 4500B will power up in
the emulation mode. The menu item Util > Remote > GPIB > Mnemonics will display a multi-page list of all valid emulation
GPIB command mnemonics in an outline format. Use the and arrow keys, the knob and the menu keys to highlight an
item. The highlighted command is described and arguments (if any) are listed at the bottom of the report window.