Tektronix WFM 601A, Service Manual

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Operating Information
WFM 601A, WFM 601E, & WFM 601M Service Manual
2–15
SERIAL OUT. Provides a reclocked version of the selected signal input (SER A or
SER B).
JITTER OUT. Provides a 75
W
output signal from the jitter demodulator for the
WFM 601M waveform monitor. The Jitter high-pass filter (JITTER HPF)
selection does not affect this signal. You can view the jitter waveform on the
waveform monitor using the JITTER display mode. This output is disabled on
the WFM 601A and WFM 601E waveform monitors.
The RS-232 connector is a 9-pin D-type connector that provides a remote
verification interface. Figure 2–9 shows the pin assignments and the communica-
tion parameters for the RS-232 interface. The Remote Command set is defined in
Appendix C: Remote Commands of the User Manuals.
Pin
Number
1
2
3
4
5
6
7
8
9
DCD (Received line signal detector)
RXD (Received data)
TXD (Transmitted data)
DTR (DTE readly)
Signal ground
DCR (DCE readly)
RTS (Request to send)
CTS (Clear to send)
Not connected
Data Connection
Baud: 9600
Data bits: 8
Stop bits: 1
Parity: None
Communication parameters
Flow control: Xon/Xoff
Figure 2–9: Pin assignments for the RS-232 connector
The rear-panel REMOTE connector is a 25-pin, D-type connector that allows
low-level remote control. Use the RS-232 interface for control using SCPI
commands sent from a PC controller.
The 25-pin remote connector provides remote control of presets and monitoring
of line select and video alarm events. Eight of the Presets (stored front-panel
settings) can be stored or recalled remotely.
STORE. When pin 25 is grounded along with one of the preset pins, the current
front-panel settings are stored at the selected Preset location.
Line Select Strobe. Pin 15 outputs an active-low TTL pulse during selected lines
when in Line Select modes. Use this signal as a trigger for a logic analyzer or
oscilloscope.
RS-232 Connector
Remote Connector