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5.5.4.4. Gain X I 0 (sensitivity) channel A
-
Depress A (B) of S1.
-
Depress A (B) of S23.
-
Set the AMPL/DIV switch S9 (S11) to 2mV.
-
Apply a square-wave signal, freq. IOkHz, ampl. 10mV to input A (B).
-
Check that the trace height is 5 div.
5.5.4.5. Trigger view sensitivity via EXT and A and B
- Set the controls as indicated in fig. 4.1.
- Put the MTB TIME/DIV (S15) in position 0.5ms.
- Set the AMPL/DIV switch S9
- Apply a square-wave signal, freq. IOkHz, ampl. exactly 0.8V to input EXT (X5) and A and B.
-
Apply a square-wave signal, freq. IOkHz, ampl. exactly 2V to input EXT (X5) and A and B.
- Depress TRIG VIEW of S1.
-
Depress TRIG and AUTO PP of S3.
- Set the trace in the vertical centre by means of the LEVEL control R6,
-
Depress EXT of S23,
- Check that the trace height
- Depress A of S23.
- Check that the trace height
- Depress B of S23.
-
Check that the trace height is exactly 4 div.; if necessary readjust R961, fig. 5.2.
5.5.5.
Square-wave response and bandwidth
The adjustments of channel A and B are identical.
The item numbers of the kpobs, sockets and adjustments of channel B are shown in brackets behind those of
channel A.
5.5.5.1. Attenuator square-wave response, channel A
- Set the controls as indicated in fig. 4.1.
- Set the MTB TIME/DIV switch S15 to 20p.
-
Apply
square-wave signal freq. IOkHz, rise time
a
- Depress A (B) of S1.
- Depress A
of S23.
- Check the trace height of the displayed signal (indicated in the table below).
- Check the square-wave response; check that
readjust as indicated in the table below.
Channel A
2 mV
5 mV
20 mV
50 mV
v
0.1
v
0.2
0.5 V
2
v
5
v
v
- Remove the input signal
+
-
or
3%; if necessary readjust R586 (R786), fig. 5.2.
is 4 div.; if necessary readjust R1104, fig. 5.2.
is exactly 4 div.; if necessary readjust R958, fig. 5.2.
the pulse-top errors do not exceed
Amplitude of input
Adjusting element
signal A (B)
channel A
12 mV
30 mV
60 mV
120 mV
300 mV
C509
600 mV
v
1.2
C511
3
v
6
V
C503
30
V
+
or -1 % ; if necessary
Trace height
+
or -1%
see fig. 5.2.
5-15
6 div.
6 div.
6 div.
6 div.
6 div.
6 div.
6 div.
6 div.
6 div.
6 div.
3 div.
3 div.
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