HP 3325A - Manual (Page 11)

TB 9-6625-2049-35
11
(4) Set oscilloscope controls to measure ramp retrace time from the 90 to 10 percent
points. Ramp retrace time will be
≤ 3 µ s.
(5) Press FUNCTION negative ramp key and repeat (4) above.
b. Adjustments. No adjustments can be made.
12. Frequency Accuracy
a. Performance Check
(1) Connect TI SIGNAL to frequency counter CHANNEL A.
(2) Press keys and enter values using DATA keys as listed in (a) through (f) below:
(a) SIGNAL off (option 002 not lit).
(b) FUNCTION sine wave.
(c) ENTRY FREQ.
(d) 20 MHz.
(e) ENTRY AMPTD.
(f) .99 VOLT.
(3) Set frequency counter 50 Ω Ω /1M Ω Ω switch to 50 Ω Ω .
(4) Set frequency counter controls to measure frequency. If frequency counter does
not indicate between 19.99990 and 20.00010 MHz, perform b below.
(5) Press FUNCTION square wave key. Frequency counter will indicate between
9.999950 and 10.000050 MHz.
(6) Disconnect frequency counter from TI SIGNAL.
(7) Connect frequency counter CHANNEL A to TI SYNC OUT.
(8) Press TI FUNCTION triangle key.
(9) Set frequency counter controls to measure period. Frequency counter will
indicate between 99.99950 and 100.00050
µ s.
(10) Press FUNCTION positive ramp key. Frequency counter will indicate between
99.99950 and 100.00050
µ s.
(11) Press FUNCTION negative ramp key. Frequency counter will indicate between
99.99950 and 100.00050
µ s.
(12) Disconnect frequency counter from TI SYNC OUT.
(13) Connect frequency counter to TI AUX 21-60 MHz (rear panel).
(14) Press keys and enter values using DATA keys as listed in (a) through (c) below:
(a) FUNCTION sine wave.
(b) ENTRY FREQ.
(c) 60 MHz.