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r
(6)
Reduce the input from the signal generator unti I the display ceases to
operate then carefully increase the input for a correct and stable display
(threshold). Note the output level setting of the signal generator.
(7)
Switch the slide switch Attenuator to 0.1 to 100V and check that the display
does not operate.
(8)
Carefully increase the level of input signal to obtain a correct and stable
display. Note the output level setting of the signal generator.
(9)
The input voltage level required to operate the display in (8) should be
20dB
±
4dB higher than that required to operate the display in (6).
6.14
Attenuator 19-0620 (Model 9059 only)
(1)
Apply a signal of 480 MHz at 10 mV r.m.s. to the 9059 Channel 'B' input
(no 50Q termination required).
(2)
Set Channel 'B' Slide Switch Attenuator to 0.01 -
5V.
(3)
Set the Function Switch to Frequency 'B'.
(4)
Press the 10
ms
(MHz) Range Switch Push Button.
(5)
Check for correct display of the input frequency.
(6)
Reduce the input from the signal generator unti
I the display ceases
to operate then carefully increase the input for a correct and stable display.
Note the output level setting of the signal generator.
(7)
Set the Channel • B' Slide Switch Attenuator to 0.1 to
5V
and check that
the display does not operate.
(8)
Carefully increase the level of input signal for a correct and stable display.
Note the output level setting of the signal generator.
(9)
The input voltage required to operate the display in (8) should be 20dB
±
3dB higher than that required to operate the display in (6).
SENSITIVIlY CHECK
6.15
In the following checks the signal generator must be calibrated by an electronic
voltmeter to ensure an accurate 1 OmV input.
6-5
9057/9059
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