1730–Series Checks and Adjustments
5–11
d. Return the autotransformer to 110 or 220 Volts.
3. Check Calibrator Frequency
REQUIREMENT – Frequency 100 kHz ±100 Hz, Synchronizes 1LINE and
2LINE SWEEP (free runs in 2FLD).
a. Connect a X10 probe from the frequency counter to the blue CRT lead
on the 1730–Series Main circuit board.
b. Display the CAL signal at the 2LINE SWEEP rate.
c. CHECK – that the frequency of the Calibrator is 99.9 to 100.1 kHz.
d. CHECK – that the Calibrator is synchronized in both 1LINE and 2LINE
SWEEP.
e. CHECK – that sweep free runs in 2FLD.
4. Sync Separation
REQUIREMENT – Check for stable sweep synchronization; internally 40 IRE
(300 mV) ±6 dB, and externally 143 mV to 4 V.
a. CHECK – that the 1730–Series instrument can be synchronized to the
amplitudes shown in Table 5–2, using the 1410–Series Option AA test
signal generator. Check both 2LINE and 2FLD SWEEP for stable
triggering.
Table 5–2. Amplitude
REFERENCE
SOURCE
SIGNAL AMPLITUDE OF SYNC
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