WA-1150 and WA-1650 Wavemeter Operating Manual
Appendix D
Rear Panel Controls
D-4
(09042-M-00 Rev C) EXFO Burleigh Products Group Inc.
6
DTR
WA-1150/1650 Data Terminal Ready. This output signal is active whenever the
instrument is powered and is not in internal reset.
7
CTS
User
Clear To Send. An input signal indicates to the instrument when
the user device is able to accept additional data.
8
RTS
WA-1150/1650 Request To Send. The instrument makes this signal active as long
as its internal command buffer has room in it. When the internal
command buffer is full, the instrument sets RTS inactive.
9
-
-
N/C
Signal Monitor Connector
The Signal Monitor connector on the back panel of the instrument provides a
combination of analog and digital signals for observing the fringe signals and
measurement timing signals using an oscilloscope. The signals have the characteristics
described in Table D-1.
The Signal Monitor output is a 15-pin, female, D-sub style connector shown in Figure D-
1 and with the pinout described in Table D-2.
Table D-1 Signal Monitor Characteristics
Analog Signals
Digital (TTL) Signals
Output Voltage
± 7 V maximum
V
OL
= 0.4V max,
V
OH
= 2.4V min
Output Current
100 mA maximum
I
OL
= 16 mA max, I
OH
= -0.4 mA
Output Timing
NA
t
r
≤
7 nsec, t
f
≤
7 nsec
Figure D-1. Signal Monitor Output Connector
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