Racal Instruments 3152A, Руководство пользователя

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3152A User Manual
Using The Instrument 3-12 Racal Instruments
©
2001
sets the filter frequency for the currently active function. 20 MHz
has a Gaussian response, and the 25 MHz and the 50 MHz
filters have an Elliptical response. Note that the filters cannot be
changed if the synthesizer is set to output sine waveform from its
standard waveform library. The filters will be activated only after
the OUTP:FILT ON command. The default filter setting is 20
MHz. Note also that 20 MHz, 25 MHz and 50 MHz designate
filter types. These parameters should be programmed as
switches, not as values. The filter type
cannot be programmed
using OUTP:FILT:FREQ 25e6 or OUTP:FILT:FREQ 50e6 Hz.
The query:
OUTPut:FILTer:FREQuency?
queries the currently selected filter setting and returns 20 MHz,
25 MHz or 50 MHz.
Activating the
Backplane
ECLTRG and
TTLTRG Lines
The Model 3152A can transmit and receive signals on the
VXIbus ECLTRG and TTLTRG lines.
Use the following command to activate one of two backplane
ECLTRG lines:
OUTPut: ECLTrg<n> { OFF | ON}
<n> designates the activated trigger line; 0 and 1 are available.
ON enables the selected trigger line. The trigger source for this
line can be selected with the TRIG:SOUR command. The default
ECLTrg<n> state is OFF.
The query:
OUTPut:ECLTrg<n>?
queries the ECLTrg<n> state and returns "<n>,0" (OFF) or
"<n>,1" (ON).
Turning on ECLTRG0 causes the module sample clock signal to
be routed onto the VXI backplane. Other Model 3152As may be
set up to receive this sample clock using the command
FREQ:RAST:SOURCE ECLTRG0 (See
Selecting the Sample
Clock Source ). ECLTRG1 should not be enabled onto the
backplane. Note that ECLTRG0 and ECLTRG1 are both used
for Inter-Module Synchronization.
The TTLTRG lines can be used to transmit and receive trigger
signals between the Model 3152A and other VXIbus modules.