Gain; Calconstant Dumper (Cc Dumper) - Tektronix 11A52 Service Manual

GAIN:
h
ADDRESS
j
k
w
EXPECTED
x y
Dia nasties
z
k:
encodes the index of the bandwidth limit setting which has the lowest bandwidth limit gain error.
Z: encodes the index of the bandwidth limit setting which has the highest bandwidth limit gain error.
korZ
0
1
2
Bandwidth Limit Setting
20MHz
lOOMHz
Full
j: encodes the index of the gain range having the lowest gain error.
Y: encodes the index of the gain range having the highest gain error.
jorY
Gain Setting
0 1 mV /div
1 2mV/div
2 SmV/div
3 lOmV/div
4
20 mV /div
5 50 mV /div
6
100 mV /div
7 200 mV /div
8
SOOmV /div
9
1 V /div
A
2 V /div
B 5 V /div
Calconstant Dumper (CC DUMPER)
The CC Dumper diagnostic provides a method of viewing any of the amplifier's internal calconstants through
the diagnostic interface without having to use the GPIB or RS232 oscilloscope interfaces. The amplifier
contains up to 64 floating point calconstants per channel, which are stored in the amplifier's non-volatile RAM.
The CC Dumper diagnostic never returns a Fail indication as it does not attempt to validate any calconstants;
its only purpose is to provide a method of querying the calconstants through the diagnostic user interface. The
diagnostic should be executed in Loop mode. When so executed, the calconstant number and the value stored in
that particular calconstant location will be displayed. The CH 1 and CH 2 buttons on the amplifier front panel
may be used to step through the calconstant storage area for the channel currently selected. Pressing the CH 1
button will increment the calconstant number on each cycle of the diagnostic; pressing the CH 2 button will
decrement the calconstant number. Pressing and holding both CH 1 and CH 2 buttons simultaneously will exit
the test, leaving the display showing the last calconstant retrieved.
Due to display field-width limitations on the oscilloscope display, the calconstant values must be rounded to
fit the allotted display area. To get exact values for the calibration constants in the amplifier, the GPIB or
RS232 calconstant query commands must be used.
11A52 Extended Service Manual 4-19