TB 9-6625-2216-24
c. Connect autotransformer to a 115 V ac source and adjust output to 115 V.
d. Press STBY/ON pushbutton to ON (in) and allow at least 1 hour for stabilization. If
TI has been disconnected from line power for more than 24 hours, allow at least 24 hours
for warm-up before beginning calibration.
e. Position controls as listed in (1) through (7) below:
(1) NORM/HOLD pushbutton to NORM (out).
(2) Function pushbuttons to FREQ A/START A (in) and PER A/T A-B (out).
(3) SHIFT key (blue pushbutton) (out).
(4) RESOLUTION pushbutton to 1 Hz (in).
(5) CHANNEL A and CHANNEL B controls as follows:
(a) LEVEL A and LEVEL B to mid-range.
(b) SLOPE to ?? (out).
(6) ATTN pushbutton to X1 (out).
(7) SEP/COM pushbutton to SEP (out).
8. Time Base Stability
a. Performance Check
(1) Connect 1 MHz output of time/frequency workstation to REF INPUT of
frequency difference meter.
(2) Connect frequency difference meter SIG INPUT to TI test point TP P (located
on the bottom of A1 next to U2 behind front panel).
(3) Adjust OSC ADJ (front panel) for option 001 (located on top, left corner) for
minimum difference indication on frequency difference meter.
(4) Allow at least 24 hours for TI time base oscillator stabilization. Frequency
difference meter will indicate less than 3 parts in 107 (1 part in 107 for option 001).
(5) Adjust autotransformer output to 105 V ac. Allow 1 minute for oscillator to
stabilize. Verify that TI oscillator drift is less than 1 part in 107 (1 part in 108 for option 001).
(6) Adjust autotransformer output to 125 V ac. Allow 1 minute for oscillator to
stabilize. Verify that TI oscillator drift is less than 1 part in 107 (1 part in 108 for option 001).
(7) Adjust autotransformer output to 115 V ac.
b. Adjustments. No further adjustments can be made.