Model 1707B Performance Check
SECTION V
PERFORMANCE CHECK AND ADJUSTMENTS
5-1. INTRODUCTION. Begin each test or adjustment with the controls set
to these positions. If a control is to be set to another
5-2. This section contains step-by-step procedures position, it will be listed in the procedures. After the
for checking the instrument specifications as given in completion of each performance check or adjustment
table 1-1 of this manual. The performance check pro- procedure, the controls should- be set back to the
cedure gives troubleshooting suggestions in case the original front panel setting. Set controls as follows:
instrument fails to meet any specification tested. A
table (performance check record) is provided at the VOLTS/DIV (A and B) ................. .01
end of the performance check for recording the meas-
coupling (A and B). ..................... AC
urements obtained in the first running of the pro- verniers (A and B) .................... CAL
cedures. The record may be used to compare meas- POSITION (A and B) ........... as required
urements taken at later dates with the original. The DISPLAY.. ................................ A
procedures for making all internal adjustments are
trig ............................ .NORM TRIG
covered in paragraphs 5-138 through 5-234. A photo- B POLARITY.. ....................... NORM
graph showing the locations of all internal adjustment HORIZONTAL POSITION. ....... as required
controls is presented in figure 5-19.
5-3. TEST EQUIPMENT.
5-4. Test equipment required for procedures in this
.......... OFF
section is listed in table 5-1. Test equipment equiva- AUTO/NORM .... ........... AUTO
lent to that recommended may be substituted, provid- AUTO/TRIG ............ .... AUTO
ed it meets the required characteristics listed in the
table. For best results, use recently calibrated test main INT/EXT ............
delayed INT/EXT.. ...................... INT
equipment. main slope.. .......... ............
5-5. PERFORMANCE CHECK. main TRIGGER LEVE
delayed TRIGGER LEVEL.
5-6. The following subparagraphs describe pro-
cedures to determine whether or not the
instrument is operating within the specifications of
table 1-1. This can be used as part of an incoming DELAY TIME .................... 1.00
inspection, as a periodic operational test, or to check
calibration after repairs or adjustments have been
made. Any one of the following checks can be made
....... disengaged
separately if desired.
5-7. The first time the performance check is made,
enter the results on the performance check record 5-12. PERFORMANCE TESTS.
at the end of the procedure. Remove the record from 5-13. DEFLECTION FACTOR.
the manual and file it for future reference. Be sure
to include the instrument serial number on the record
for identification. 5-14. Specification. Ranges: from IO mV/
div to 5 V/div (9 ranges) in I, 2, 5 sequence. Ac-
curacy: *3%1 with vernier in GAL position. Vernier:
5-8. FRONT-PANEL ADJUSTMENTS.
continuously variable between all ranges, extends
5-9. Set the instrument up and perform initial adjust- maximum deflection factor to at least 12.5 V/div.
VERNIER UNCAL light indicates when vernier is not
ments outlined in Section I11 before proceeding with in CAL position.
the performance checks or adjustment procedures.
5-1 0. FRONT-PAN EL SETTl N GS. 5-15. Description. The deflection factor is check-
ed by applying a 400-Hz, voltage-calibrated signal
j to the input. The displayed signal is compared
5-11. The control settings listed below are to be used
in each performance test and adjustment procedure. against the voltage standard.
5- 1 |
ACEC
