Model 1415A Appendix I
APPENDIX I
OPTIONS
OPTION 14. Figure 5-6,
ClOl and C102: Change value to 2250 pf.
The Model i415A Time Domain Reflectometer with C146: Change value to 5000 pf.
Option 14 is a standard hp Model 1415A with an addi- L170: Change value to 2.5 MH.
tional position added to the DISTANCE/TIME switch. R149: Change value to 10K ohms.
This added position is equal to 1000 nsec/cm expressed
in time, or 10, 000 CM LINE/CM DISPLAY (polyeth- Figure 5-12,
ylene) and 15,000 CM LINE/CM DISPLAY (air) ex- Replace with Figure IA-1 of this Appendix.
pressed in distance. To provide this extended range, Figure 5-14,
changes have been made in several circuits resulting Replace S301 switch circuit with Figure IA-2 of
in several changes to the specifications. To provide this Appendix.
coverage for an Option 14 instrument, the following C325: Delete
changes must be made to this manual. Figure 5-18,
L401 and L402: Change value to 1.0 ph.
Table 1-1,
SYSTEM R422 and R423: Change value to 22M ohms.
Rise Time: Less than 200 psec. Add L405, 1.0 mh, in the -12.6 v input line
(outside the shield).
Repetition Rate: 30 kc nominal.
SIGNAL CHANNEL Table 6-1 and 6-2,
Rise Time: Approximately 190 psec.
Noise and Internal Pickup, Peak: 0.25% of Make changes as indicated in Table IA-1 of this
Appendix.
step (terminated into 50 ohms).
STEP GENERATOR In all other respects, the Option 14 instrument is
Droop: Less than 2%. electrically identical to the standard Model 141 5A.
DISTANCE/TIME SCALE
Polyethylene Line (E =2.25): 200 cm/cm to
100 m/cm.
Air Line (E =l): 300 cm/cm to 150 m/cm. C330 L303 C335 C336 C331 C332
Time Scale: 20 nsec/cm to 1 psec/cm,* 5%
accuracy.
Paragraph 3 - 8, fourth-f rom- last line,
Change "30007' to "600".
Paragraph 3-8, last line,
Change "30, 000" to "6000".
Paragraph 4-2, line 7; and 4-6, line 2,
Change "150 kc'' to "30 kc".
Paragraph 5-12, step f,
Change "0. 15" to "0.20", and "1. 5" to "2. 0".
Paragraph 5-14, step b,
Change "1 cm" to "2 cm".
Paragraph 5-15, step d, last line,
Change to read "less than 0.5 cm peak. ''
Paragraph 5-27, step c,
Change SWEEP TIME TO "5 psec/cm".
Paragraph 5-27, step d, first line,
Change "5 microsecondsTt to 30 microseconds".
Paragraph 5-38, step a,
Change NSEC/CM to "1000". S301 R332 C333 C334 R338 R337
Figures 5-5 and 5-13,
Change waveform time reference from "7. 5 1415A-A-57
pSEC" to "30 pSEC".
5 igure IA-1. Component Locations on A9,
Option 14.
01944-3 IA- 1/IA-2 |
ACEC
