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corresponding decimal point correction at the pri'nter. Carry out this
test usi ng both the;' 10 and the:- 100 outputs.
(5)
If Option 05 is fitted, select Istraight through I mode on the Remote
Control Uni t. Check that the counter reads the correct frequency and
that the correct decimal point printout is obtained.
SUPPLEMENTARY ALIGNMENT PROCEDURE
AMPLIFIER DIVIDER ASSEMBLY :19-0630
Overall Gain and Response Check Using Sweep Scanner.
NOTE:
It is assumed that the user is fully conversant with the type of sweep
scanner to be used and that the Amplifier Divider Board is mounted
in a servicable instrument.
4. 11
Equipment Required
(a) Sweep Scanner such as a KnotfJlPolyskanner
ll
•
(b) Coaxial lead with BNC plug at each end.
,
(c) Coaxial lead with BNC plug at one end and open wire at the other,
with lOOn resistor and O. llJF capacitor wired in series.
4. 12
Procedure
(1)
Allow the Sweep Scanner to warm up and set the.controls for H.F.
operation with output attenuation of -25 dB and frequency sweep (initially)
of 0.5 MHz to 50 MHz.
(2)
Set up the Sweep Scanner to an appropriate input reference for gain
•
measurement.
(3)
Connect the R. F. OUTPUT socket of the Sweep Scanner to the INPUT
socket of the Decade Divider instrument under test.
(4)
On the Decade Divider set the SENSITIVITY switch to the most sensitive
setting. (O.OlV)
(5)
Using the open-ended coaxial lead, with the 1000 resistor and O.lIJF
<
capacitor wired in series, co.nnect the Sweep Scanner R. F.lnput socket
to the base of transistor Q6 (junction of R26/C16) on the Amplifier
Divider Board. The braiding should be lightly soldered to the adjacent
901
0-
9013
4 - 7
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