Keysight Technologies N5244/5B Service Manual page 196

Theory of Operations
Synthesized Source Group Operation
Table 5-3 TEST SET I/O Connector Pin Assignments
DB-25 Female Connector
Pin Numbers Name
7 GND
8 LAS
9–11 AD4–AD2
12 GND
13 Interrupt In
14 +22 V
15–16 SEL1–2
17 AD11
18 SEL3
19–21 AD7–5
22–23 AD0–1
24 LDS
25 RLW
5-28
Function
0 V, ground reference
TTL out, active low address strobe (1 μs min)
TTL I/O, address and latched data
0 V, ground reference
TTL in, low level (10 μs min) aborts sweep
+22 Vdc, 100 mA max.
TTL out, test set select bits 1-2, tied to 0 V
TTL I/O, address and latched data
TTL out, test set select bit 3, tied to 0 V
TTL I/O, address and latched data
TTL I/O, address and latched data
TTL out, active low data strobe (1 μs min)
TTL out, high = read, low = write
Keysight N5244B/45B Service Guide