Keysight N5264A Service Manual page 71

Theory of Operation
Synthesized LO Group Operation (Option 108)
Table 5-1 TEST SET I/O Connector Pin Assignments
DB-25 Female Connector
Pin Numbers Name
18 SEL3
19–21 AD7–5
22–23 AD0–1
24 LDS
25 RLW
Table 5-2 HANDLER I/O Connector Pin Assignments
Rectangular 36-Pin Female Connector
Pin Numbers Name
1 GND
2 INPUT1
3–4 OUTPUT1–2
5–12 Port A0–7 Out
13–20 Port B0–7 Out
21–24 Port C I/O
25–28 Port D I/O
29 Port C Status
30 Port D Status
31 Output Strobe
Write Strobe
32 No connect
33 Pass Fail
Keysight N5264A Service Guide
Function
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 s min)
TTL out, high = read, low = write
Function
0 V, ground reference
TTL in, negative pulse (1 s min) latches OUTPUT1-2
TTL out, latched
TTL out, latched
TTL out, latched
TTL I/O, latched
TTL I/O, latched
TTL out, low = input mode, high = output mode
TTL out, low = input mode, high = output mode
TTL out, active low data write strobe (1 s min)
Not used
TTL out, latched, indicates pass fail (programmable polarity)
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