12-56
Module I/O Specifications
A27 DAC/Upconverter
A27 DAC/Upconverter
Use extender card 08922-60129.
Use coax jumpers on Plug 1, pins 7, 9 and 13. Plug 3, pin 15.
Power Supplies
Inputs
See "A5 Premodulation Filter and NSM", page 12-10, for measurement procedure.
The NSM_IF_DATA can be probed on SMC connectors Plug 1 (pins 7, 9 and 13). The
NSM Data Stream is difficult to measure on a digital oscilloscope.
The Table shown are typical settings for an oscilloscope. To obtain a reading the display
persistance must be increased. Typically 1 bit of the data stream will be60 ns.
+15 V J2(2) 20 mA
-15 V J2(3) 50 mA
+5 V J2(4) 25 mA
-5 V J2(1) 150 mA
Ground J1(1,3,4,17,18,20)
J3(1-4,6-14,16-20)
From A5 Premod Filter and NSM
NSM_IF_CLK J1(2)
Frequency: 17.3333 MHz± 250 Hz
Level: TTL
NSM_IF_DATA J1(5-16)
Level: TTL