HP 4277A Operation And Service Manual page 149

Model 4277A
SECTION IV
2. Set the 4277A's controls as follows:
DC BIAS selector switch (rear panel) . INT (OPTION 001)
DC BIAS switch (front panel) . ON
TEST SIG LEVEL . LOW
Other controls . Any setting
3. Set the dc bias voltage in accordance with Table 4-10. The voltage readings on
the 3478A should be within the test limits given in the table.
Table 4-10. INT DC Bias Voltage Test Limits
DC Bias Setting Test Limits
-O.OIV 0.ImV to -20-ImV
6.82V
6.7895V to 6.8505V
-9.99V
-9.8801V to -10.0999V
lOV
9.9i5V to 10.085V
-12.7V
-12.5.58V to -12.862V
40V
39.765V to 40.235V
-40V
-39.565V to -40.435V