Keysight N9038A MXE Service Guide 339
Analog & Digital IF
A3 Digital I.F. Assembly Description
The Smart Noise Source (SNS) interface includes power switching for the
28 volt and 15 volt power supply. In addition, it has buffers to interface to
the SNS I2C bus for control and read back of ENR data automatically. The
SNS connector is used with the SNS series noise sources.
DSP
The signal from the ADC is sent to the Digital Signal Processor.
Digital Bus Common Mode Filtering
The Digital Bus is a real time digital interface. It is sometimes referred to as
Messenger or LVDS. The implementation on the Digital IF is unidirectional,
meaning it can only source data, not receive it. Common mode filtering is
required to translate the digital ground referenced signals to analog ground
at the rear panel.
A3 Digital IF Assembly Connections
The connections to and from the A3 Digital IF assembly are as listed in Table
10-6, as illustrated in Figure 10-11 and Figure 10-12.
Table 10-6 A3 Digital IF Assembly Signals
Port Description To/From Cable Frequency
J4 Digital Bus Not Available n/a n/a
J5 Analog Out Rear Panel n/a n/a
J6 Trigger 2 Out Rear Panel n/a n/a
J7 Trigger 1 Out Rear Panel n/a n/a
J8 Sync Rear Panel n/a n/a
J9 Trigger 2 In Rear Panel n/a n/a
J10 Trigger 1 In Rear Panel n/a n/a
J11 Noise Source Rear Panel n/a n/a
J12 Smart Noise Source Rear Panel A3W1 n/a
J13 Reference Out Rear Panel n/a 10 MHz
J14 Reference In A16 Reference J716 W20 100 MHz
J15 IF Input
A15 Front End Control J901
a
W15 322.5 MHz
J16 Not Used n/a n/a n/a
J17 Step Cal Output A16 Reference J726 W23 n/a
J18 Not Used n/a n/a n/a
J19 IF Input A2 Analog IF J601 W17 22.5 MHz
To Next Page
Loading...
