Practice Quiz in Wire and Wireless Communications System Part 56

Question 551. If a switching machine is set to accept pulses at a rate of 10 pulses per second with a 60% break, find the make interval of the switch.

Question 552. Phase jitters occur at what frequency?

Question 553. A type of signaling was developed as an alternative to loop signaling.

Question 554. A telephone exchange has a subscriber loop limit of 1800 ohms, excluding the telephone instrument. What is the farthest distance, in miles, that a subscriber can be located away from the telephone exchange, if AWG 26 cable, which has a resistance of 431 ohms/loop mile, is used?

Question 555. Signals that provide the routing information, such as calling and called numbers.

Question 556. If the tuning meter reads midscale, what would this indicate in facsimile?

Question 557. The letter of the loaded cable designation 24B88 indicates

Question 558. What emf is required across the circuit in facsimile to form a dark spot?

Question 559. In a standard CCITT group, 12 channels FDM, the carrier frequency of the channel No. 1 is _______________.

Question 560. With what type transmitter is fax transmitted on HF?