5-18 Keysight N5227B Service Guide
Theory of Operation
Synthesized Source Group Operation
5-
9–11
AD4–AD2
TTL I/O, address and latched data
12
GND
0 V, ground reference
13
Interrupt In
TTL in, low level (10
μ
s min) aborts sweep
14
+22 V
+22 Vdc, 100 mA max.
15–16
SEL1–2
TTL out, test set select bits 1-2, tied to 0 V
17
AD11
TTL I/O, address and latched data
18
SEL3
TTL out, test set select bit 3, tied to 0 V
19–21
AD7–5
TTL I/O, address and latched data
22–23
AD0–1
TTL I/O, address and latched data
24
LDS
TTL out, active low data strobe (1
μ
s min)
25
RLW
TTL out, high = read, low = write
Table 5-3
HANDLER I/O Connector Pin Assignments
Rectangular 36-Pin Female Connector
Pin Numbers
Name
Function
1
GND
0 V, ground reference
2
INPUT1
TTL in, negative pulse (1
μ
s min) latches OUTPUT1-2
3–4
OUTPUT1–2
TTL out, latched
5–12
Port A0–7 Out
TTL out, latched
13–20
Port B0–7 Out
TTL out, latched
21–24
Port C I/O
TTL I/O, latched
25–28
Port D I/O
TTL I/O, latched
Table 5-2
TEST SET I/O Connector Pin Assignments
DB-25 Female Connector
Pin Numbers
Name
Function
