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(4)
(5)
(6)
Press Button 2 (MHz} on. the Push Button Range Switch to check the 1 MHz
display.
Press Button 4 (kHz).
Carefully adjust the internal oscillator fora display reading of±3 parts in
107 (Refer to Fig.2.4 Service View: Chassis Upperside}.
NOTE:
The displayed reading should be five O's with the least significant digit
reading 0, 1, 2 or 3 or five 9's with the least significant digit reading
9,8or7.
6. 11
Externa I Frequency Standard Input
(1)
Set the Function Switch to FREQUENCY (9057) or FREQUENCY 'A' (9059)
(2)
Set the Operate/Check switch to CHECK.
(3)
Set the Internal/External Switch to EXTERNAL.
(4)
Apply the 1 MHz frequency standard to the 1 MHz External Frequency
Standard input socket at a level of 80mV r.m.s.
(5)
Press Button 3 (kHz) on the Push Button
Range Switch.
(6)
Check that the display reads 100.000.
ATTENUATOR CHECKS
6.12
Equipment:
Signal Generator
I
T
1
piece and 50Q I oad.
6. 13
Attenuator 19-0662
9057/9059
(1)
Apply a signal of 80 MHz at 10 mV r.m.s. into a 50Q termination to the
rnput socket ('A
I
input on 9059).
(2)
Set .the Slide Switch Attenuator to 0.01 - 10V.
(3)
Set the Function Switch to FREQUENCY or FREQUENCY 'A'.
(4)
Press the 10 ms (MHz) Range Switch Push Button.
(5)
Check for correct display of the input frequency.
6-4
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