HP 8082A Operating And Service Manual page 57
Hide thumbs
Also See for 8082A:
- Operating and service manual (113 pages) ,
- Operating and service manual (111 pages) ,
- Operating and service manual (17 pages)
Table of Contents
Advertisement
Table 5-23. Positive Pulse Baseiine
STEP
1
Set 8082A for positive output pulses.
2
Observe right channel baseline shift white rotating
amplitude vernier. Adjust A5 R81 for minimum baseline shift (a
fixed dc offset may be present1.
3
Adjust A5 R80 for zero dc offset in right channel.
Adjust A5 R 17 5 for zero dc offset in left channel.
4
Carry out steps 1 to 4 for normal and compl modes, with
5
transition times of ln-5n and 5n-50% and with transition time
verniers CCW and CW. Readjust A5 R80, R81, R 115 for the
best compromise. Baseline shift should not exceed f 80mV in
the 5-2V attenuator ranga
Table 5-24. Width
STEP
1
1 REP RATE
8 WIDTH
9
WIDTH
VERNIER
Set A4 R43 for a 7ns pulse width.
2
3
Set 8082A to max rep rate, r,rrn delay, min width. Set
A4 R24O for a pulse width between 1.95 and 2.OOns. Optimize
adjustments for the worst case of normlcompl, right/left
channel.
Set pulse width selector to SW.
4
Observe p&se amplitude and baseline shift while varying rep rate
ADJUSTMENTS
ABOUT 20 MHz
2-5ns
Table 5-25. Gate
STEP
1 REP RATE
7 MODE SWITCH
Drive 8082A from a 5 MHz, 50% duty cycle source
2
3
Adjust A3 R87 for a correct first pulse.
4
Set the 8082A to SQUARE WAVE.
5
Readjust A3 R87. if necessary. (If readjusted, verify
step 3).
6
between A3 J3 (SW output, A3 U2 pin 71 and - 1OV (at
A3 C131. Values tie in range 1.8 l&to 5.6 kfi
NOTE: For instruments with serial numbars
below: disconnect ground leads at A4 Q69 and 070 of the co-ax
cables which link the width circuit (A4 U4f to the level shifter
7
Repeat steps 2 to 5.
Table 5-26. Double Puke
STEP
1
1.2 REP RATE
8.9 WIDTH
3
DOUBLE
PULSE/NORM
4 DELAY
5 V E R N I E R
2
Verify pubes are equal in width.
First pulse width can ba adjusted by sefecting A4 R42 values in
the range 3-10 I&?. This adjustment is done at the factory.
3
If A4 R42 is changed, repeat tables 5-24 and 5-25.
M a x
Min
GATE
1410600270 and
Min
DOUBLE PULSE
c c w
Advertisement
Table of Contents
