HP 8590 E & L Series Spectrum Analyzers and HP 8591C Cable TV ...

Person0 computer Analyzer
TxD 2 > > 2 RxD
RxD 3 3 TxD
RTS 4
1 DCD
;a; ,” s 4 DTR
GND 7
DCD 8
DTR 20
no connection 9 RI
Figure C-2. HP 245426 25-pin to g-pin Full Handshaking Connection
Personal Computer Analyzer
DCD 1 < < 7 RTS
RxD 2
TxD 3
DTR 4
GND 5
RTS 7
I:: ,” z
5 GND
1 DCD
4 DTR
RI 9 no connection 9 RI
Figure C-3. HP 24542U g-pin to g-pin Full Handshaking Connection
If your computer operates with only three wires, you can use the cable connections in
Figure C-4.
Some computers require that the CTS, DSR, and DCD inputs be true before serial transmission
can occur. lb solve this problem, you can wire these three signals to the personal computer
RTS line.
Personal Computer Analyzer
TxD 2 > > 2 RxD
RxD 3 < < 3 TxD
GND 7 < < 5 GND
E 8 7 1 CTS RTS DCD
Figure C-4. 25-pin to O-pin S-Wire Connection
cu135e
cu136e
cu137e
M-232 and Parallel Option 043 C-3