Initial Checkout Procedure; Rs-232-C Dip Switch Settings; Test Equipment And Tools - Wavetek 75 Instruction Manual

pin can be connected to an always positive
pin on the other device or to pin 4 on the
Model 75.
(5) Pin 4 is always positive when the power is
on and can be connected to any pin on the
other device that requires being held
positive.
(6) Pins 6and 8are properly terminated inputs
but have no function.
NOTE
Anypins not mentioned in the previous list are
not connected in the Model 75and therefore
can be connected to anything if the connec-
tions are already present in the cable.
3. The handshaking method is front panel selectable
as CTSIDTR (hardware) or XONIXOFF (see para-
graph 3.31 for more information).
4. Set the baud rateon the Model 75 to the highest rate
that is available on both the Model 75 and the other
device by setting the dip switches (figure 2-8)
according to table 2-4.
5. Configure the other device for the same baud rate
as in step 4, 1 stop bit, 8 data bits, and no parity.
Table 2-4. RS-232-C DIP Switch Settings
Baud Rate SW1-4 SW1-3 SW1-2 SW1-1
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Open
Open
Closed
Open
Open
Closed
Open
Closed
Open
Open
Closed
Open
Closed
Open
Open
Closed
Closed
Open
Closed
Closed
Closed
Open
Open
Closed
Open
1
Open
I
Closed
Closed
1
( 3 ; : ;
I
Closed
Open Open
Closed
Closed
Closed
Open
Closed
Closed
Open
*This is the factory set position
NOTE 1 . SW1-5 should always be OPEN
2. Factory connector configuration is DCE
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Closed
Open
Open
Open
Open
Open
Open
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2.3 INITIAL CHECKOUT PROCEDURE
The Model 75 ARB waveform generator will supply a
variety of waveforms at the ARB Out connector that can
be modified at will using the front panel controls. In order
toverify the operation of the controls and the functions1
modeslvalues that they control, the generator must first
be set up to produce an output and then the effect of the
controls on the output and the display indications noted.
While this procedure verifies functional operation of this
instrument, it does not verify the calibration.Thevalues
shown are typical values and should only be used as a
guide. Required tools and test equipment are shown in
table 2-5.
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Open
Open
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Table 2-5. Test Equipment and Tools
Instrument Comments
Oscilloscope *
50R Feedthrough
BNC Tee
BNC Coax Cable
Signal Source*
Frequency
Counter
Dual channel. 20 MHz rnin band-
width with external trigger and Z-
axis capability.
2 % accuracy, 2W
1 male to 2 female
RG58U,
Q
3 ft. length (4 each)
1 MHz capability with square
wave (1 0 Vp-p into 50R) and TTL
output.
Capable of both frequency and
period measurements.
*Check the oscilloscope manual to determine the
maximum allowable Z-axis input voltage. Do not
exceed that voltage.
*A second Model 75 can be used as the signal source.
For the TTL signal requirements, use the Ref Out
connector on the rear panel and use the SAMPL
soft key to set the frequency. For the 1 kHz, 10 Vp-p
signal, use the STOP soft key to set the stop address
to 1999, use the FREQ soft key to set the frequency,
and use the FUNC and EXEC soft keys to select a
square wave. See section 3 for more detail.
To verify the overall operation of the Model 75 ARB
waveform generator, follow the procedure in table 2-6.
Refer to the referenced figures and tables for appropriate
test equipment connections and settings. Refer to figure
3-1 and paragraph 3.2 for control and connector
locations.
Scans by ArtekMedia O 2006'