Tektronix Type 82 PLUG-IN Instruction Manual page 33

Significant ditferences between ohmmeter types are: (1) ohmmeters did not differ so much in these respects, the re-
the amount of internal voltage they use (2) the currents they sistance measurements as given in the table would be more
require to make the meter needle deflect full scale for each typical.
range, and (3) the scale readings on the meter itself. If
TABLE 4-3
Diode A ONLY B ONLY ALTER. CHOP.
D134 Forward Forward Forward Forward
D138 Reverse Reverse Reverse Reverse
D139 Reverse Reverse Reverse Reverse
D234 Forward Forward Forward Forward
D238 Reverse Reverse Reverse Reverse
D239 Reverse Reverse Reverse Reverse
D501 Reverse Forward
D502 Reverse Forward
D503 Forward Reverse
D504 Forward Reverse See footnote 1. See footnote 1.
D562 Forward Reverse
D572 Reverse Forward
D566 Reverse Reverse
foot . tnote 2, D576 Reverse Reverse See footnote 2 See footnote
D579 Unbiased Unbiased See footnote 3. See footnote 3.
D580 Unbiased Unbiased Unbiased Unbiased
D581 Forward Forward Forward Reverse
D585 Reverse Reverse Slightly reverse biased. Reverse
See footnote 4.
D586 Reverse Reverse Reverse 100 ke-Reverse
D590 Unbiased Unbiased See footnote 5. See footnote 5.
D506 Forward Reverse
D507 Forward Reverse ;
D508 Reverse Forward See footnote 1. See footnote 1.
D509 Reverse Forward
1. Same as A ONLY bias conditions when channel A is electronically switched ''on"; same as B ONLY
2, Reverse biased. Conducts only during duration of positive-going trigger pulses.
3. Unbiased. Conducts when triggers from Blocking Oscillator stage are applied.
4. Conducts only when the positive-going portion of the alternate trace sync pulse is applied to the diode.
5. Unbiased. Conducts only during the negative-going backswing as 7590 field collapses.
conditions when channel B is
4-9