Frequency; Offset Vertification Procedures - Wavetek 75 Instruction Manual

Table 5-4. Offset Vertification Procedures
- -
Remarks
1. Setup, RSET (F2), EXEC (F3)
1
Sets default values
2. Edit, ERASE (F2), EXEC (F3)
Clears waveform memory
Verify that the ARB OUT offset value as shown on
the DVM is O V
_+
5 mV.
3. Parameter, AMPL (Fl), Control knob
I
Set amplitude to 5.00 mVp.
4. OFFSET (F2), Control knob Adjust the offset to each of the following settings
Verify that the DVM offset values are within the
specified limits for each setting.
SETTING UPPER I-IMIT
LOWER LIMIT
- - - - - -
5. Remove the ARB OUT cable with the 50R termination from the DVM and connect to the oscilloscope CHAN
1 vertical input.
6. Control knob
I
Adjust the offset from
-
5.00V to
+
5.00V and verify
that the output level smoothly increases from
-
5V
1
to
+
i v .
5.7 FREQUENCY 1. Interconnect the Model 75 and test equipment as
This paragraph verifies the sample frequency accuracy
shown in figure 5-4.
of the Model 75 throughout its range. If the readings are
outside the upper or lower limits, the instrument is in need
2. Set the frequency counter controls to measure fre-
of repair. Refer to Section 6 (Troubleshooting) and Sec-
quency with maximum resolution.
tion 4 (Circuit Description) for help in solving an out of
tolerance problem.
3. Perform the steps in the order shown in table 5-5.
Scans by ArtekMedia O 2006